HomeMy WebLinkAboutCDP 2018-0031; EL CAMINO AT CANNON ROAD INTERSECTION IMPROVEMENTS - CIP 6042; BIOLOGICAL RESOURCES TECHNICAL REPORT; 2020-06-01BIOLOGICAL RESOURCES TECHNICAL REPORT
EL CAMINO REAL AT CANNON ROAD INTERSECTION IMPROVEMENTS
PROJECT
CITY OF CARLSBAD
SAN DIEGO COUNTY, CALIFORNIA
Prepared for:
City of Carlsbad
1635 Faraday Avenue
Carlsbad, California 92008
Contact: Brandon Miles
Prepared by:
LSA Associates, Inc.
703 Palomar Airport Road, Suite 260
Carlsbad, California 92011
(760) 931-5471
LSA Project No. HCR1905
LSA
May 2018 I Revised June 2020
•
B10lOGICAl RESOURCES TECHNICAL R"CST
R,v,,.o JUNE 2020
E, CAMINO RHL AT CANNON Roso INHRSECTION IMPRO\IEMEHS PROJECT
CIT, OF CA'l,OAO, CAWORNIA
TABLE OF CONTENTS
LSA
SECTION 1.0: SUMMARY OF FINDINGS ................................................................................................. 1
SECTION 2.0: INTRODUCTION ................................................................................................................ 3
2.1 PROJECT DESCRIPTION .............................................................................................................. 3
2.1.1 Sidewalk Improvements ............................................................................................... 3
2.1.2 Bridge and Barrier/Rail Improvements ........................................................................ 3
2.1.3 New Pedestrian Bridge ................................................................................................. 5
2.1.4 Utility Relocation .......................................................................................................... 5
2.2 BIOLOGICAL STUDY AREA .......................................................................................................... 6
SECTION 3.0: METHODS ......................................................................................................................... 7
3.1 LITERATURE AND DATABASE REVIEW ....................................................................................... 7
3.2 GENERAL BIOLOGICAL RESOURCES ASSESSMENT ..................................................................... 7
3.3 JURISDICTIONAL DELINEATION ................................................................................................. 8
3.4 FALL/WINTER SEASON NIGHTTIME BAT SURVEY ...................................................................... 8
SECTION 4.0: RESULTS AND DISCUSSION ............................................................................................. 10
4.1 VEGETATION COMMUNITIES .................................................................................................. 10
4.1.1 Riparian Scrub ............................................................................................................ 10
4.1.2 Freshwater Marsh ...................................................................................................... 10
4.1.3 Unvegetated Stream Channel .................................................................................... 12
4.1.4 Open Water ................................................................................................................ 12
4.1.5 Coastal Sage Scrub ..................................................................................................... 12
4.1.6 Nonnative Grassland .................................................................................................. 12
4.1.7 Ornamental ................................................................................................................ 12
4.1.8 Bare Ground ............................................................................................................... 12
4.1.9 Developed .................................................................................................................. 12
4.2 TOPOGRAPHY .......................................................................................................................... 12
4.3 SOILS ........................................................................................................................................ 13
4.4 SPECIAL-STATUS SPECIES ......................................................................................................... 13
4.4.1 Special-Status Plants .................................................................................................. 14
4.4.2 Special-Status Wildlife ................................................................................................ 14
4.4.3 HMP Covered Species ................................................................................................. 15
4.4.4 Narrow Endemic Species ............................................................................................ 16
4.5 U.S. FISH AND WILDLIFE SERVICE CRITICAL HABITAT AREAS .................................................. 16
4.6 WILDLIFE CORRIDORS .............................................................................................................. 16
4.7 AQUATIC RESOURCES .............................................................................................................. 16
SECTION 5.0: IMPACT DETERMINATIONS ............................................................................................ 19
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EL CAMINO REAL AT CAN NO~ ROAD INT(RS,CTION IMt•OVEMrnTS PROHCT c,n OF CASLSBAO, (AllFOR~•· LSA
5.1 PROJECT-SPECIFIC IMPACTS .................................................................................................... 19
5.1.1 Permanent lmpacts .................................................................................................... 19
5.1.2 Temporary Impacts .................................................................................................... 19
5.1.3 Direct Impacts ............................................................................................................ 19
5.1.4 Indirect Impacts .......................................................................................................... 19
5.2 VEGETATION COMMUNITIES .................................................................................................. 19
5.3 SPECIAL-STATUS PLANT SPECIES ............................................................................................. 21
5.4 SPECIAL-STATUS WILDLIFE SPECIES ......................................................................................... 21
5.4.1 Special-Status Invertebrate Species ........................................................................... 21
5.4.2 Special-Status Avian Species and Nesting Birds ......................................................... 21
5.4.3 Special-Status Bat Species .......................................................................................... 22
5.5 HMP COVERED SPECIES ........................................................................................................... 22
5.6 NARROW ENDEMIC SPECIES ................................................................................................... 22
5.7 U.S. FISH AND WILDLIFE SERVICE CRITICAL HABITAT AREAS .................................................. 22
5.8 WILDLIFE MOVEMENT CORRIDORS ......................................................................................... 22
5.9 AQUATIC RESOURCES .............................................................................................................. 23
SECTION 6.0: HMP COMPLIANCE ......................................................................................................... 25
6.1 REDUCTION OF IMPACTS TO VEGETATION COMMUNITIES .................................................... 25
6.1.1 Temporary Impacts .................................................................................................... 25
6.1.2 Permanent Impacts .................................................................................................... 25
6.2 REDUCTION OF IMPACTS TO SPECIAL-STATUS SPECIES .......................................................... 25
6.2.1 Special-Status Plant Species ....................................................................................... 25
6.2.2 Special-Status Invertebrate Species ........................................................................... 26
6.2.3 Special-Status Avian Species and Nesting Migratory Birds ........................................ 26
6.2.4 Special-Status Bat Species .......................................................................................... 26
6.2.5 HMP Covered Species ..............................................................................................•.• 27
6.2.6 Narrow Endemic Species ............................................................................................ 27
6.3 REDUCTION OF IMPACTS TO JURISDICTIONAL RESOURCES ................................................... 27
6.4 COMPLIANCE WITH HMP COASTAL ZONE STANDARDS .......................................................... 27
6.5 AVOIDANCE AND MINIMIZATION MEASURES ........................................................................ 28
SECTION 7.0: REFERENCES .................................................................................................................. 31
FIGURES
Figure 1: Project Location ...........................................................................................................•.•.•.•.•••. 4
Figure 2: Vegetation Map ............................................................................................................••••.••.• 11
Figure 3: Aquatic Resources Map ...............................................................................................••.•.•.•.• 18
Figure 4: Proposed Project Impacts to Vegetation .............................................................................. 20
Figure S: Proposed Project Impacts to Aquatic Resources .................................................................. 24
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TABLES
EL CAMINO R,., AT CANNON Ro,o INTERS,CTION IMe,ov,MENTS P,oncr
CITY OF CSOtSBAO, CAUFORN<A LSA
Table A: Vegetation Communities within the BSA (Acres) ................................................................... 10
Table B: Criteria for Evaluating Special-Status Plant and Wildlife Species Potential for Occurrence
(PFO) .............................................................................................................................................. 14
Table C: Potential Corps and RWQCB Jurisdictional Waters of the U.S. within the BSA ...................... 17
Table D: Potential CDFW Jurisdiction within the BSA .......................................................................... 17
Table E: Potential CCC Wetlands within the BSA ................................................................................. 17
Table F: Anticipated Impacts by Vegetation Community (Square Feet) .............................................. 21
Table G: Potential Impacts to Corps and RWQCB Jurisdictional Waters of the U.S ............................. 23
Table H: Potential Impacts to CDFW Jurisdiction ................................................................................. 23
Table I: Potential Impacts to CCC Wetlands ......................................................................................... 23
Table J: HMP-Required Mitigation for Permanent Impacts to Vegetation Communities .................... 25
APPENDICES
APPENDIX A: SITE PHOTOGRAPHS
APPENDIX B: VASCULAR PLANT SPECIES OBSERVED
APPENDIX C: WILDLIFE SPECIES OBSERVED
APPENDIX D: JURISDICTIONAL DELINEATION REPORT
APPENDIX E: FALL/WINTER SEASON NIGHTTIME BAT SURVEY
APPENDIX F: SPECIAL-STATUS SPECIES SUMMARY TABLE
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610lOGICAL R,sou,us TECHNICAL REPO•T
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EL CAM,sO REAl Al CANNON ROAD INHRSECllDN IMPROYH"NTS PROJECT
(.r, OF [ARLSOAD, [AUFOaNIA LSA
SECTION 1.0: SUMMARY OF FINDINGS
The City of Carlsbad (City) proposes to improve pedestrian and vehicular operations across the Agua
Hedionda Creek Bridge at the intersection of El Camino Real (ECR) and Cannon Road in the City of
Carlsbad, San Diego County, California. Major components of the proposed project include sidewalk
improvements, bridge and barrier rail improvements, and constructing a new pedestrian bridge
across Agua Hedionda Creek along the eastern edge of ECR.1
Under contract with the City, LSA conducted a pre-construction general biological resources
assessment, a fall/winter season nighttime bat survey, and a jurisdictional delineation to identify the
limits of aquatic resources potentially subject to the jurisdiction of the United States Army Corps of
Engineers (Corps), the Regional Water Quality Control Board (RWQCB), the California Department of
Fish and Wildlife (CDFW), and the California Coastal Commission (CCC). LSA surveyed an
approximately 3.46-acre Biological Study Area (BSA). LSA conducted the original general biological
resources assessment on December 8, 2014, and a follow-up site visit on March 9, 2018, to update
vegetation mapping and note any changes within the BSA. LSA conducted the original jurisdictional
delineation fieldwork on December 10, 2014, and follow-up site visits on April 30, 2018, and April
22, 2019, to assess the BSA for any changes to aquatic resources. LSA conducted the fall/winter
season nighttime bat survey on November 11, 2015. LSA did not perform an updated bat survey, as
much of the BSA is highly disturbed, and an updated bat survey is not likely to yield different
findings or data in support of additional mitigation measures.
The entire BSA is within the City Habitat Management Plan (HMP) Area. The western half of the BSA
(west of the eastern edge of the ECR right-of-way) is within the Coastal Zone and within an existing
Hardline Conservation Area at the northwestern corner of Local Facilities Management Zone 24. The
western half of the BSA appears to be within the Core 4 Focused Planning Area (FPA}, while the
eastern half of the BSA appears to be within Linkage Area B, which connects to the Core 2 and Core
3 FPAs.
Yuma myotis {Myotis yumanensis, CDFW Special Animal), a special-status bat species, was observed
during the fall/winter season nighttime bat survey and San Diego marsh-elder (Iva hayesiana,
California Rare Plant Rank [CRPR] 2B.2), a special-status plant species, was observed during the
general biological resources assessment. An additional six special-status wildlife species have a
moderate or higher potential to occur within the BSA based on the presence of suitable habitat;
however, none was observed during the biological surveys. These species are monarch butterfly
(Danaus plexippus), coastal California gnatcatcher (Pofiopti/o ca{ifornica ca/ifornica), least Bell's vireo
(Vireo be/Iii pusilfus), western red bat (Lasiurus blossevillii), hoary bat (Lasiurus cinereus), and
western yellow bat (Lasiurus xanthinus)
Although special-status vegetation communities (e.g., riparian scrub, freshwater marsh, coastal sage
scrub, open water, unvegetated stream channel, and nonnative grassland) as well as unregulated
Although the section of ECR within the project site is oriented in a northwest to southeast direction, ECR typically runs
north to south, so for the purposes of simplification and clarification, all directions have been changed to be
consistent with a north-south orientation for ECR.
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BIOLOGICAL Resau,c,s lECHNICAl R"aRT
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EL CAMINO REAi AT CANNON Ro•o INH,HCTION IM,oov,M<Nr> PRQ,<CT
Ci,, OF CAAL>OAO, CAL"O,NIA LSA
vegetation communities/land uses (e.g., ornamental, disturbed habitat, and developed land) occur
within the BSA, impacts to these communities will be temporary and mostly low-intensity, with the
exception of nonnative grassland, ornamental, and developed land, which will result in
approximately 0.01 acre, 0.05 acre, and 0.04 acre of permanent impacts, respectively. Due to the
small amount of permanent impacts to nonnative grassland, the City will achieve the HM P's
mitigation requirement by planting native grassland or other appropriate native plant species on site
where ornamental vegetation is currently present. Permanent impacts to ornamental and
developed land do not require mitigation.
The project is not expected to result in permanent impacts to areas subject to regulation by the
Corps, the RWQCB, the CDFW, or the CCC. However, 130 square feet of temporary impacts to these
areas will require acquisition of permits from the Corps, the RWQCB, the CDFW, and the CCC.
Because these impacts will be temporary and low-intensity (associated with the placement of
scaffolding for sidewalk overhang construction on top of vegetation/ground) mitigation is not
expected to be required.
Implementation of the resource avoidance and minimization measures listed in Section 6.5 will
contribute to the minimization of impacts to special-status species and habitat, nesting birds, and
aquatic resources.
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BIOlOGICAL Re;ou•cB T,c~••c.L REPORT
REVISED JUNE 2020
tL CAMINO REAL., C••NON Ro•o INTERS,CTIDN IMPAOVEMENT> PROJECT
Cin OF C"LSOAO, CA<IFO,NIA LSA
SECTION 2.0: INTRODUCTION
2.1 PROJECT DESCRIPTION
The City proposes to improve pedestrian and vehicular operations across the Agua Hedionda Creek
Bridge (hereafter referred to as ECR Bridge) at the intersection of ECR and Cannon Road in the City
of Carlsbad, San Diego County, California (Figure 1). Major components of the proposed project
include sidewalk improvements, bridge and barrier rail improvements, and constructing a new
pedestrian bridge across Agua Hedionda Creek along the eastern edge of ECR, within the public
right-of-way. These major components are described in further detail below.
2.1.1 Sidewalk Improvements
The project proposes construction of a new concrete cantilever slab on top of the existing cantilever
slab, to widen the existing western sidewalk from 4 feet to 6 feet. The existing pedestrian hand
railing would be relocated to the new sidewalk edge and new barriers would be installed to replace
the existing obsolete bridge railings.
The sidewalk along the eastern side of ECR is discontinuous for 2S0 feet between Cannon Road and
the southern end of the bridge. To complete this missing section of sidewalk, a separate pedestrian
bridge is proposed adjacent to the eastern side of the bridge. Details regarding this new pedestrian
bridge are discussed below.
2.1.2 Bridge and Barrier/Rail Improvements
Existing bridge barriers are damaged in some locations and are obsolete, as they do not meet
current Federal Highway Administration (FHWA) crash standards. Concrete and steel barriers along
both edges of the bridge deck will be removed and new standard bridge barriers will be installed.
New rails will most likely be see-through steel railings. Additionally, the new eastern bridge railing
requires impact protection to meet current crash standards. This will likely be in the form of a
compact crash-absorbing barrier assembly. The new bridge barrier along the western edge of the
bridge deck will be offset several feet from its original alignment, necessitating reconstruction of the
approaching metal beam guard rail. This guard rail may also be replaced with a crash barrier, similar
to the eastern barrier railing approach. The outward alignment of the barrier will result in the
widening of the southbound bicycle lane. According to inspectiOh reports, bridge deck cracking has
become worse with time, and cracks are currently present at all four abutment walls at the ends of
the deck slabs. To mitigate this existing microcracking, prevent water intrusion, and reduce
corrosion rates, a clear Methacrylate sealant will be poured over the entire riding surface of the
concrete bridge deck.
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2.1.3 New Pedestrian Bridge
A new pedestrian bridge is proposed to be installed along the eastern edge of the existing vehicular
bridge. The pedestrian bridge would be a prefabricated steel truss bridge, 8 feet wide and 120 feet
long, connecting the sidewalk along ECR to the sidewalk at the Cannon Road intersection. The
pedestrian bridge will be constructed on new concrete abutments aligned with the existing ECR
bridge abutments, which will be supported on deep micro pile foundations. The vertical profile of the
proposed steel truss pedestrian bridge would be relatively flat with the deck approximately 18
inches higher than the top of the existing ECR bridge to achieve positive freeboard clearance from
flows within Agua Hedionda Creek during a 100-year storm event. Additional right-of-way will be
obtained along the eastern edge of the project to accommodate this new pedestrian bridge.
2.1.4 Utility Relocation
Numerous overhead utilities along the eastern edge of the bridge must be relocated to
accommodate the proposed project. Other utilities in the vicinity consist of a large underground
water main, conduits mounted to the edge of the ECR bridge deck, and two fuel lines and one gas
line underground along the proposed alignment of the pedestrian bridge. Utilities attached to the
eastern edge of the ECR Bridge deck would be protected in place. Affected utilities will either be
abandoned or relocated to the new pedestrian bridge.
Construction of the new pedestrian bridge abutments is expected to occur from the creek bed and
from the parkways above. A portion of the existing brick soundwall behind the southeastern
sidewalk will be demolished to allow for the installation of the new pedestrian bridge. The
soundwall would be reconstructed and realigned inside the property line of the adjacent residences.
Access to the creek bed is anticipated either from the northeastern embankment or an access road
from the private driveway several hundred feet upstream. A private gated road and lot adjacent to
the northeastern embankment may be considered as a contractor staging area.
After construction of the bridge improvements, sidewalks, curbs, and gutters approaching the
bridge will be rebuilt. The existing 5-foot-wide sidewalk along the eastern side of ECR, east of the
bridge, may also require widening. The temporary project construction footprint will extend beyond
the current right-of-way along both sides of the bridge.
San Diego Gas & Electric will be installing a 5-inch electrical conduit duct bank within the new
pedestrian bridge. Excavation will be required on both sides of the existing bridge structure for
connection to existing conduit. Once this work is completed, the two overhead electric distribution
poles and associated hardware will be removed.
During project construction, several closures of varying durations are anticipated. Long-term
shoulder and/or outside lane closures are anticipated during barrier rail replacement operations.
Short-term lane closures are anticipated during concrete placement operations. Overnight closure
of the entire bridge is required for the deck overlay. At least one bus stop and one driveway are
within the project limits and may be affected by these project-related closures.
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E, C•MINO R,u AT CANNOO Ro,o l>HERSECTION IMPROVEM,NTS PROJECT
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The planted areas disturbed during construction will be revegetated upon completion of the
proposed project.
2.2 BIOLOGICAL STUDY AREA
The BSA encompasses a 3.46-acre area south of the intersection at ECR and Cannon Road in the City
of Carlsbad, San Diego County, California. Specifically, the BSA is in the Agua Hedionda Land Grant of
the United States Geological Survey {USGS) San Luis Rey, California 7.5-minute topographic
quadrangle map.
The BSA contains a section of Agua Hedionda Creek that supports various plant and wildlife species.
Due to surrounding residential development, the eastern section of the BSA (east of ECR) is
dominated by ornamental vegetation. Native vegetation communities, such as riparian scrub,
freshwater marsh, and coastal sage scrub are present at the western section of the BSA (west of
ECR). Photographs of the BSA are included as Appendix A.
The BSA is within the South Coast subregion of the Southwestern California region of the California
Floristic Province and within the Carlsbad Hydrologic Unit {Carlsbad Watershed).
The entire BSA is within the HMP Plan Area. The western half of the BSA (west of the eastern edge
of the ECR right-of-way) is within the Coastal Zone and within an existing Hard line Conservation
Area at the northwestern corner of Local Facilities Management Zone 24. The western half of the
BSA appears to be within the Core 4 FPA, while the eastern half of the BSA appears to be within
linkage Area B, which connects to the Core 2 and Core 3 FPAs.
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B10tOGICAC RESOURCEs T,ca~ICAL Repos,
REVISfD JUNE 2020
E, CAMINO R,>L AT CANNON Ro•o INTER5'Cfl0N 1 .... 0VEMENTS PROJ<CT
(1TY OF (AR<SMD, (ACIFOHOA LSA
SECTION 3.0: METHODS
3.1 LITERATURE AND DATABASE REVIEW
Prior to conducting field surveys, LSA reviewed the most recent records of the CDFW California
Natural Diversity Data Base (CNDDB 2014) and the California Native Plant Society's Electronic
Inventory of Rare and Endangered Vascular Plants of California (CNPS 2014) within a 3-mile radius of
the BSA. The CNDDB contains records of reported occurrences of Federal-and/or State-listed
species, proposed endangered or threatened species, California Species of Special Concern (SSC), or
otherwise special-status species or habitats that may occur within or in the vicinity of the BSA.
Additionally, LSA reviewed the HMP to identify covered species with potential to occur in the BSA.
3.2 GENERAL BIOLOGICAL RESOURCES ASSESSMENT
LSA Senior Biologist Jaime Morales and LSA Biologist Scott Batchelder conducted a general biological
resources assessment on December 8, 2014. The assessment included the following elements:
• Mapping of habitat types;
• A directed search for special-status plant and animal species with potential to occur within the
BSA;
• A general inventory of plant and wildlife species;
• Evaluation of suitability of habitat for special-status resources identified during the literature
search;
• Preliminary identification of areas that may be considered wetland or nonwetland waters of the
U.S., stream beds as defined by the Corps and the CDFW, and wetlands as defined by the CCC;
and
• Notes on other pertinent features or conditions of the site and adjacent lands.
LSA recorded a list of all plant species observed within the BSA (see Appendix B). LSA identified and
mapped on an aerial photograph vegetation communities within the BSA. Then, using Geographic
Information System (GIS) software, LSA digitized the mapping and calculated the acreages of
vegetation communities occurring within the BSA. Vegetation communities were determined in
accordance with the categories described in Holland ( 1986) and Oberbauer (2008). Plant
nomenclature follows that of The Jepson Manual: Higher Plants of California (Hickman 1993).
Special-status plant species with a potential to occur within the BSA are described in Section 4.4.
All wildlife observed and wildlife sign detected, including tracks, scat, carcasses, burrows,
excavations, and vocalizations, were recorded and are included as Appendix C. Notes were made on
the general habitat types, species observed, and the conditions of the site. Special-status wildlife
species with a potential to occur within the BSA are described in Section 4.4.
Mr. Morales conducted a site visit on March 9, 2018, to update the vegetation map due to changes
in the project footprint.
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EL CAM••o R<AL AT CANNON ROAD INn,;,c·10N IM .. OV>MENYS PRO.OCT
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3.3 JURISDICTIONAL DELINEATION
LSA
Mr. Morales and Mr. Batchelder performed the fieldwork associated with a jurisdictional delineation
on December 10, 2014. LSA prepared a field map of the area to be surveyed using a 2014 aerial
photograph base at a scale of 1 inch= 56.25 feet. The study area was surveyed on foot and all areas
of potential jurisdiction were evaluated according to Corps, CDFW, and CCC criteria. Data were
collected and recorded using a global positioning system (GPS) unit with sub-meter accuracy and
directly on the field map, particularly where GPS reception was limited due to dense tree canopies.
LSA evaluated areas supporting hydrology or species of plant life potentially indicative of wetlands
according to routine wetland delineation procedures described in the Regional Supplement to the
Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0) (Regional
Supplement) (Corps 2008). Representative sample points were selected and examined in the field in
those areas where wetland jurisdiction was in question or needed to be confirmed. At each sample
point, the dominant and subdominant plant species and their wetland indicator statuses were
identified (National Wetland Plant List 2014). A small sample pit {approximately 12-20 inches deep)
was dug at each point to examine soil characteristics and composition. Soil matrix colors were
classified according to the Munsell Soil Color Charts (Munsell Color 2010). Hydrological conditions,
including any surface inundation, saturated soils, groundwater levels, and/or other wetland
hydrology indicators, were recorded. General site characteristics were also noted. Standard data
forms were completed for each sample point. The results of the jurisdictional delineation are
presented in a separate report titled Jurisdictional Delineation Report: El Camino Real at Cannon
Road Intersection Improvements Project, City of Carlsbad, San Diego County, California prepared by
LSA (Revised December 2019). A copy of that report is included as Appendix D of this report.
Mr. Morales conducted follow-up site visits on April 30, 2018, and April 22, 2019, to assess the BSA
for any changes to aquatic resources. No significant changes to the limits or classifications of aquatic
resources were observed and the findings of the jurisdictional delineation report remain unchanged.
3.4 FALL/WINTER SEASON NIGHTTIME BAT SURVEY
LSA Senior Biologist Jill Carpenter and LSA Biologist Lonnie Rodriguez perlormed a fall/winter season
nighttime bat survey at the bridge on the evening of November 11, 2015.
Prior to the emergence period and exit count portion of the survey, the crevices between the
concrete box beams were examined for the presence of day-roosting bats with a high-intensity
spotlight, and the approximate numbers, distribution, and species of bats observed were marked on
a hand-drawn map. The exit count portion of the survey was subsequently initiated one-half hour
before sunset and continued until one hour after sunset. An observer was positioned on each side of
the bridge at a vantage point that would optimize visibility of any bats that may exit or enter the
bridge in order to obtain an estimate of the number of day-roosting bats present, and to correlate
the acoustic data recorded with visual observations. Numbers of bats exiting or entering the bridge
were recorded using tally counters. Observers remained in position counting bats until one hour
after sunset. Following completion of the emergence period, the biologists performed a second
spotlight examination of the crevices between the concrete box beams to determine how many, if
any, bats remained in the roost crevices. For the remaining hour of the survey period, the biologists
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assessed the level of night-roosting activity beneath the bridge by observing and documenting any
bat activity in the vicinity of the structure using night vision equipment.
Three Pettersson D240X and one Wildlife Acoustics EchoMeter 3+ ultrasound detectors were used in
time expansion mode to collect acoustic data during the entirety of each nighttime survey. These
data, consisting of full-spectrum sonograms of echolocation calls, were subsequently analyzed using
SonoBat 2.9 acoustic analysis software. Species identifications were made by comparing call
recordings with a library of "voucher" calls from known hand-released bats. Some limitations are
inherent in acoustic monitoring and in the analysis of acoustic data and include (but are not limited
to) human bias and past experience in data interpretation, as well as the fact that some species are
not equally detectable or may not be recorded at all. For example, some bats (e.g., Mexican free-
tailed bats [Tadarida brasi/iensis]) emit loud low-frequency echolocati~n calls that can be recorded
from great distances and will be overrepresented in the data, while "whispering" bats (e.g.,
Townsend's big-eared bats [Corynarhinus townsendi1l) emit faint calls that may not be recorded at
all. In addition, not all call sequences are identifiable. Different bat species may use similar types of
echolocation calls, or the same species may use different types of echolocation calls based on the
perceptual task and the immediate environment or habitat. In addition, not all bats recorded will be
those exiting or entering the bridge in question. Some are foraging bats en route to or from other
structures. It is important, therefore, to have observers on site in order to correlate calls with visual
observations.
The results of the nighttime bat survey are presented in a separate memorandum prepared by LSA
(January 2016). A copy of that memorandum is included as Appendix E of this report. LSA did not
perform an updated bat survey, as much of the BSA is highly disturbed, and an updated bat survey is
not likely to yield different findings or data in support of additional mitigation measures.
p ,\HCR1905 -ECR at Cannon Rd ln>provomonts\BTR\ECR Bridge 8TR_Rev_Juno2020_Clean docx 106/17 /201 9
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E, CAMINO RHl AT CANNON RoAO INHR5,CTIOI< IMeaOVEME~TS P•OJ<CT
(,n OF (ARlSUD, CAUFOR~IA LSA
SECTION 4.0: RESULTS AND DISCUSSION
4.1 VEGETATION COMMUNITIES
The BSA supports vegetation communities totaling 3.46 acres. Vegetation communities identified
during the general biological resources assessment include riparian scrub, freshwater marsh, coastal
sage scrub, unvegetated stream channel, open water, nonnative grassland, ornamental, bare
ground, and developed land. Figure 2 displays the vegetation communities within the BSA on an
aerial photograph. The vegetation communities observed within the BSA are described below. All
plant species observed during the survey are listed in Appendix B. Table A presents the acreages of
the vegetation communities identified in the BSA.
Table A: Vegetation Communities within the BSA (Acres)
Vegetation Community Total Area
Riparian Scrub 0.37
Freshwater Marsh 0.42
Unvegetated Stream Channel 0.20
Open Water 0.20
Coastal Sage Scrub 0.16
Nonnative Grassland 0.08
Ornamental 0.53
Bare Ground 0.02
Developed 1.47
Total• 3.46
*Total may not equal sum due to rounding.
4.1.1 Riparian Scrub
Within the BSA, riparian scrub was observed on the banks of Agua Hedionda Creek and on the
western edge of an adjacent wetland at the southeastern corner of the BSA, west of ECR. Plant
species observed include arroyo willow (Salix fasiofepis), Goodding's black willow (So/ix gooddingii),
red willow {So/ix laevigata), poison oak (Toxicodendron diversifobum), mule fat (Baccharis
sa/icifolia), and Brazilian pepper tree (Schinus terebinthifolius). In areas where tree cover was less
dense, the understory was composed of combinations of the following species: bristly ox-tongue
{Picris echioides), wild celery (Apiastrum angustifo/ium), giant reed (Arundo donax), bur clover
(Medicago polymorpha), stinging nettle {Urtica dioica), castor bean (Ricinus communis), and
saltmarsh fleabane (Pluchea odorata). Although not a dominant species, multiple San Diego marsh-
elder {Iva hayesiana) individuals, a special-status plant species, were identified west of ECR in the
riparian scrub understory.
4.1.2 Freshwater Marsh
Freshwater marsh was present within the BSA at two locations west of ECR and one strip east of
ECR. The freshwater marsh within the BSA was dominated by broadleaf cattail (Typha fatifo/ia).
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4.1.3 Unvegetated Stream Channel
Areas designated as unvegetated stream channel within the BSA consist of stream bed that lack
surface vegetation and are not underwater. A strip of unvegetated stream channel is present along
Agua Hedionda Creek, east of ECR. Strips of unvegetated stream channel also occur under the
bridge.
4.1.4 Open Water
Areas designated as open water within the BSA consist of areas within Agua Hedionda Creek that
lack surface vegetation and are composed entirely of water.
4.1.5 Coastal Sage Scrub
Coastal sage scrub vegetation was observed at two locations near the southwestern portion and
along the northeastern edge of the BSA. Plant species observed include California sagebrush
(Artemisia ca/ifornica), mule fat, coastal goldenbush (lsocoma menziesi1J, coyote brush (Bacchoris
piluloris), and California wildrose (Rosa californica).
4.1.6 Nonnative Grassland
Areas designated as nonnative grassland within the BSA consist of mostly nonnative annual
vegetation. Nonnative grassland was observed east of ECR. Plant species observed include Bermuda
grass (Cynodon dacty/on), burclover, African brass buttons (Cotula coronop,folio), cheeseweed
(Malva parvif/ora), and Mexican fan palm (Washingtonia robusta) sprouts.
4.1.7 Ornamental
Large areas of ornamental vegetation are present throughout the eastern portion of the BSA.
Ornamental vegetation includes trees and shrubs, such as pine (Pfnus spp.) trees, Mexican fan palm
trees, eucalyptus (Eucalyptus sp.) trees, and acacia (Acacia spp.) shrubs, which are typically
associated with residences, commercial properties, roadsides, and other developed areas.
4.1.8 Bare Ground
This designation applies to areas within the BSA that consist of highly compacted soils with little to
no vegetation.
4.1.9 Developed
The developed areas within the BSA consist of paved or gravel roads, sidewalks, and other road
features.
4.2 TOPOGRAPHY
The topography within the BSA varies from relatively flat along the drainage bottom to moderate
slopes along the banks and terraces.
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4.3 SOILS
Ee CAMINO REAL AT CANNO~ ROAD INHRS•CTION IMPAOV<MENTS PROJECT
c,n 0, CARLSBAD, CALIFO,NIA LSA
The Soil Survey for the Son Diego Area, California, Part I {Soil Conservation Service 1973) San Luis
Rey, California quadrangle identifies the soil expected to correspond to the BSA as Sartell fine sand,
6 to 12 percent slopes (SbC) and Rim rock-Cave complex (Rm).
4.4 SPECIAL-STATUS SPECIES
This section provides a summary of the special-status species potentially occurring within the BSA.
The following information is a list of abbreviations used to help determine the significance of
special-status species potentially occurring within the BSA.
US: Federal Classifications
FE Taxa listed as Endangered.
FT Taxa listed as Threatened.
FPE Taxa proposed for listing as Endangered.
FPT Taxa proposed for listing as Threatened.
FPD Taxa proposed for delisting.
FC Candidate for listing as Threatened or Endangered.
CA: State Classifications
SE Taxa State-listed as Endangered.
ST Taxa State-listed as Threatened.
SR Taxa State-listed as Rare.
SCE Candidate for State-listing as Endangered.
SCT Candidate for State-listing as Threatened.
SSC California Species of Special Concern. Refers to animals with vulnerable or seriously
declining populations.
CFP California Fully Protected. Refers to animals protected from take under Fish and Game
Code Sections 3511, 4700, 5050, and 5515.
SA Special Animal. Refers to any other animal monitored by the Natural Diversity Data
Base, regardless of its legal or protection status.
SP Special Plant. Refers to any other plant monitored by the Natural Diversity Data Base,
regardless of its legal or protection status.
CRPR: California Native Plant Society (CNPS) California Rare Plant Rank (CRPR) Classifications
1A Plants presumed extinct in California.
1B Rare, threatened, or endangered in California and elsewhere.
2B Rare, threatened, or endangered in California, but more common elsewhere.
3 Plants about which more information is needed-a CNPS review list.
4 Plants of limited distribution - a CNPS watch list.
CRPR Extensions
0.1 Seriously endangered in California (greater than 80 percent of occurrences
threatened/high degree and immediacy of threat).
0.2 Fairly endangered in California (20 to 80 percent occurrences threatened).
0.3 Not very endangered in California (less than 20 percent of occurrences threatened).
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Table B lists criteria for evaluating special-status plant and wildlife species potential for occurrence
(PFO).
Table B: Criteria for Evaluating Special-Status Plant and Wildlife Species Potential for
Occurrence (PFO)
PFO Criteria
Absent Species is restricted to habitats or environmental conditions that do not occur within the BSA.
L= Historical records for this species do not exist within the BSA, and/or habitats or environmental conditions
needed to support the species are of poor quality.
Moderate Either a historical record exists of the species within the BSA and marginal habitat exists within the
proposed work areas or the habitat requirements or environmental conditions associated with the species
occur within the proposed work areas, but no historical records exist within the BSA.
High Both a historical record exists of the species and the habitat requirements and environmental conditions
associated with the species occur within the BSA.
Present Species was detected within or near the BSA during project surveys.
Each special-status plant and wildlife species with the potential to be present in the project vicinity
is discussed in Appendix F.
4.4.1 Special-Status Plants
The results of the records search indicate the potential occurrence of seven species listed as
Threatened or Endangered at the Federal and/or State level (hereafter referred to as listed species)
and 37 other special-status plant species. Based on the results of the biological resources
assessment, of these 44 special-status plant species, only one species {San Diego marsh-elder) was
determined to have a moderate or higher potential of occurring within the BSA due to the presence
of suitable habitat (see 4.4.1.1, below). San Diego marsh-elder was observed in the BSA during the
biological resources assessment. The remaining 43 special-status plant species identified by the
literature review have a low potential to occur within the BSA due to the presence of only
marginally-suitable habitat, or are not expected to occur within the BSA due to the absence of
suitable habitat.
4.4.1.1: San Diego Marsh-Elder (Iva hayesianaJ CRPR 28.2
A few scattered individuals of this species were observed west of ECR on the banks of Agua
Hedionda Creek under the canopy of the riparian scrub.
4.4.2 Special-Status Wildlife
The results of the records search indicate the potential occurrence of four listed species and 11
other special-status wildlife species. Based on the results of the biological resources assessment, of
these 15 species, seven species (monarch butterfly [Danaus pfexippus], coastal California
gnatcatcher [Polioptifa ca/ifornica ca/ifornicaJ, least Bell's vireo [Vireo be/Iii pusillus], western red bat
[Lasiurus b/assevilli11, hoary bat [Lasiurus cinereusJ, western yellow bat [Lasiurus xanthinus], and
Yuma myotis (Myotis yumanensis]) have a moderate or higher potential of occurring within the BSA
due to the presence of suitable habitat (see 4.4.2.1 through 4.4.2.7, below). Yuma myotis was
observed in the BSA during the bat survey. The remaining eight special-status wildlife species
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identified by the literature review have a low potential to occur within the BSA due to the presence
of only marginally-suitable habitat or are not expected to occur within the BSA due to the absence
of suitable habitat.
4.4.2.1: Monarch Butterfly (Danaus plexippusJ SA
Although no individuals of this species were observed during the biological resources assessment,
the eucalyptus trees present within the BSA provide suitable roosting habitat.
4.4.2.2: Coastal California Gnatcatcher (Polioptila californica californica) FT, SSC, HMP Covered
Although no individuals of this species were observed during the biological resources assessment,
the coastal sage scrub present within the BSA provides suitable nesting and foraging habitat.
4.4.2.3: Least Bell's Vireo (Vireo bellii pusillus) FE, SE, HMP Covered
Although no individuals of this species were observed during the biological resources assessment,
the riparian scrub present within the BSA provides suitable nesting and foraging habitat.
4.4.2.4: Western Red Bat {lasiurus blossevillii) SSC
Although no individuals of this species were observed or detected during the biological resources
assessment or the bat survey, Mexican fan palm, willow (Salix sp.), and eucalyptus trees present
within the BSA provide suitable roosting habitat.
4.4.25: Hoary Bat {lasiurus cinereus) SA
Although no individuals of this species were observed or detected during the biological resources
assessment or the bat survey, Mexican fan palm, willow, and eucalyptus trees present within the
BSA provide suitable roosting habitat.
4.4.2.6: Western Yellow Bat (lasiurus xanthinusJ SSC
Although no individuals of this species were observed or detected during the biological resources
assessment or the bat survey, Mexican fan palm, willow, and eucalyptus trees present within the
BSA provide suitable roosting habitat.
4.4.2.7: Yuma Myotis (Myotis yumanensis) SA
During the bat survey, approximately 12 individuals of this species were identified within the
crevices between the concrete beams of the ECR Bridge.
4.4.3 HMP Covered Species
These are species for which take authorization would be provided by the City because long-term
viability was determined to be adequately maintained under a particular preserve design. The
results of the records search indicate the potential occurrence of eight HMP Covered Species. Based
on the results of the biological resources assessment, two of these species (coastal California
gnatcatcher and least Bell's vireo) were determined to have a moderate or higher potential of
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occurring within the BSA due to the presence of suitable habitat. No HMP Covered Species were
observed during the biological resources assessment.
4.4.4 Narrow Endemic Species
These are species with restricted geographic distributions, soil affinities, and/or habitats. For
purposes of the HMP, Narrow Endemic species include those that have important populations
within the HMP area, such that substantial loss of these populations or their habitat within the HMP
area might jeopardize their continued existence or recovery. The results of the records search
indicate the potential occurrence of 12 Narrow Endemic species. However, based on the results of
the biological resources assessment, none of these species is expected to occur within the BSA due
to the absence of suitable habitat. No Narrow Endemic species were observed in the BSA during the
biological resources assessment.
4.5 U.S. FISH AND WILDLIFE SERVICE CRITICAL HABITAT AREAS
Critical habitat for thread-leaved brodiaea (Brodiaea fi/ifolia), coastal California gnatcatcher, San
Diego thorn-mint (Acanthomintha ilicifofia), and southwestern willow flycatcher (Empidonax trail/ii
extimus) is approximately 0.8 mile southeast, 1.5 miles south, 2.1 miles east, and 2.5 miles east of
the BSA, respectively.
4.6 WILDLIFE CORRIDORS
The northern half of the BSA serves as a migration corridor for wildlife species. The BSA, via Agua
Hedionda Creek, connects to undeveloped land to the west and Los Monos Canyon to the east,
which is also undeveloped. The eastern half of the BSA is within HMP linkage B, which connects the
Core 4 FPA to the Core 2 and 3 FPAs.
4.7 AQUATIC RESOURCES
Calavera Creek and Agua Hedionda Creek converge east of the BSA. Agua Hedionda Creek continues
westward and conveys flows through the BSA. The creek conveys flows within a natural channel and
underneath the ECR Bridge. Water within the creek may also receive additional water from irrigation
runoff from the surrounding development and associated ornamental vegetation. Additionally,
hydrophytic vegetation and hydric soils occur at the southeastern corner of the BSA. This area does
not receive flows from Agua Hedionda Creek; rather, it is at a similar elevation to the creek, and the
hydrophytic vegetation is likely supported by a high water table. A vegetated berm and unpaved
access road separate this area from Agua Hedionda Creek. LSA presumes that a hydraulic connection
exists between Agua Hedionda Creek and the area dominated by hydrophytic vegetation that is
outside of the OHWM.
Agua Hedionda Creek is a tributary to the Agua Hedionda Lagoon, and ultimately the Pacific Ocean
(a Traditional Navigable Water (TNW] of the U.S.). Because of the direct connection with the Pacific
Ocean, this feature is subject to Corps jurisdiction to the Ordinary High Water Mark (OHWM) and
adjacent wetlands. The entire area mapped as wetlands meets all three criteria for wetland waters
of the U.S. as defined by the Corps: wetland hydrology, hydric soils, and dominance of hydrophytic
plant species. However, based on recent guidance from Corps staff, areas within the OHWM that
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BIOlDGICAL R,scu,c,s T,cHNICAL R,eoRT
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meet all three criteria for wetland waters of the U.S. are mapped as nonwetland waters of the U.S.
Because the area at the southwestern corner of the BSA displays a hydraulic connection (i.e.,
hydrology) to the creek, prevalence of hydrophytic vegetation, and presence of hydric soils, LSA
considers this area to be wetland waters of the U.S. that are adjacent to Agua Hedionda Creek.
Streambed and banks, including riparian scrub vegetation associated with this drainage feature, are
subject to CDFW jurisdiction. Because the western half of the BSA (west of the eastern edge of the
ECR right-of-way) is within the Coastal Zone, areas west of the eastern edge of the ECR right-of-way
that are subject to CDFW jurisdiction are also considered CCC Wetlands.
Functions and values for the creek were determined to have a moderate to high significance in
terms of resources. Figure 3 depicts the location of this feature and extent of resource agency
jurisdiction. Further information about the aquatic resources present within the BSA is presented in
a report titled Jurisdictional Delineation Report: El Camino Real at Connon Rood Intersection
Improvements Project, City of Carlsbad, San Diego County, California prepared by LSA (2019). A copy
of the report is included as Appendix D of this report.
Tables C, D, and E display the total acreages of potential Corps/RWQCB jurisdiction, CDFW
jurisdiction, and CCC wetlands identified within the BSA, respectively.
Table C: Potential Corps and RWQCB Jurisdictional Waters of the U.S. within the BSA
Linear Wetland Waters Non-Wetland Total Corps/RWQCB
Feature Feet {Acres) Waters (Acres) Jurisdiction (Acres)
Agua Hedionda Creek and 240 0.40 0.59 0.98 Adjacent Wetlands
Table D: Potential CDFW Jurisdiction within the BSA
Feature Stream bed/Banks and Riparian Vegetation {Acres)
Agua Hedionda Creek and Adjacent Wetlands 1.16
Table E: Potential CCC Wetlands within the BSA
Feature CCC Wetlands (Aaes)
Agua Hedionda Creek and Adjacent Wetlands 1.05
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BIOLOGICAL R,sou,c,s TEC•NICAt REPOaT
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SECTION 5.0: IMPACT DETERMINATIONS
5.1 PROJECT-SPECIFIC IMPACTS
Construction of this project would result in temporary disturbance to riparian scrub, freshwater
marsh, unvegetated stream channel, open water, coastal sage scrub, nonnative grassland,
ornamental vegetation, and developed land. Construction of this project would result in permanent
loss of a small amount of nonnative grassland, ornamental vegetation, and developed land.
5.1.1 Permanent Impacts
Permanent loss involves long-term impacts associated with construction of the pedestrian bridge
and sidewalk overhang abutments.
5.1.2 Temporary Impacts
Temporary disturbance includes grading and compaction at four areas associated with each of the
four pedestrian bridge/sidewalk overhang abutments, followed by efforts associated with
subsequent revegetation (e.g., site preparation and hydroseeding). Minor temporary disturbance
will also occur due to construction crew pedestrian access through vegetation and placement of
scaffolding for sidewalk overhang construction on top of vegetation/ground.
5.1.3 Direct Impacts
Direct impacts to vegetation communities will result from temporary and/or permanent clearing of
vegetation or temporary physical disturbance of vegetation (construction crew pedestrian access
and placement of equipment materials). It is anticipated that wildlife within the immediate vicinity
of any active work areas will be displaced for the duration of the activity.
5.1.4 Indirect Impacts
Indirect impacts to adjacent areas may result from noise and dust generated by construction-related
activities, which has the potential to disturb nearby wildlife and, in the case of dust, vegetation.
Additionally, if construction is performed at night, lighting has the potential to indirectly affect
wildlife.
5.2 VEGETATION COMMUNITIES
Figure 4 displays the anticipated impacts to vegetation communities within the BSA on an aerial
photograph. Table F outlines the impacts anticipated to occur to each vegetation community as a
result of project-related activities.
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a,oLOGICAL RESOURCES TECHNICAL R>PORT
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EL CAMINO R<A_ AT CANNON ROAD INTeASecr,oN l'-'PAOVEMENTS P•OJHT
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Table F: Anticipated Impacts by Vegetation Community (Square Feet)
Vegetation Community Temporary Impacts Permanent Impacts
Riparian Scrub 48
Freshwater Marsh 11 .
Unvegetated Stream Channel 27 .
Open Water 15 .
Coastal Sage Scrub 253
Nonnative Grassland 890 (0.02 acre) 540 (0.01 acre)
Ornamental 6,819 (0.16acre) 2,002 {0.05 acre)
Bare Ground
Developed 1,528 (0.04 acre) 1,916 (0.04 acre)
Total 9,591 (0.22 acre) 4ASB (0.10 acre}
5.3 SPECIAL-STATUS PLANT SPECIES
A few scattered San Diego marsh-elder (a CRPR 2B.2 species) individuals were observed on the
banks of Agua Hedionda Creek under the canopy of the riparian scrub west of ECR. No other special-
status plant species were observed during the biological resources assessment. Due to the absence
of suitable habitat for the other special-status plant species and due to the absence of conspicuous
perennial special-status plant species other than San Diego marsh-elder, there is a low potential for
impacts to special-status plant species as a result of project-related activities. Additionally, impacts
to San Diego marsh-elder are not anticipated because project-related impacts will mostly occur in
upland areas and temporary impacts to riparian scrub will be limited to construction crew access by
foot. Implementation of avoidance measures provided in Section 6.S will further reduce the
potential for impacts to San Diego marsh-elder.
5.4 SPECIAL-STATUS WILDLIFE SPECIES
5.4.1 Special-Status Invertebrate Species
Although no special-status invertebrate species were observed during the biological resources
assessment, there is a moderate potential for monarch butterfly to roost within the eucalyptus trees
present within the BSA. Monarch butterfly wintering sites are considered a special-status resource
by the CDFW. Implementation of avoidance measures provided in Section 6.5 will reduce the
potential for impacts to monarch butterfly.
5.4.2 Special-Status Avian Species and Nesting Birds
Although no special-status avian species were observed during the biological resources assessment,
there is a moderate potential for coastal California gnatcatcher (FT, SSC, HMP Covered) and least
Bell's vireo {FE, SE, HMP Covered) to occur within the coastal sage scrub and riparian scrub in the
BSA, respectively. Impacts to coastal sage scrub and riparian scrub have the potential to affect these
species directly through the loss of suitable foraging and nesting habitat or indirectly through
impacts associated with noise and dust during construction. Additionally, if project-related activities
are conducted during the bird breeding season (January 15 through September 15), they may cause
both temporary and permanent impacts to foraging and/or nesting habitat for avian species that are
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Et CAMINO REAL AT CANNON RDAD INTERSECTION IMPAO,EMENTS PROJECr
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not considered special-status, but are covered under the Migratory Bird Treaty Act (MBTA).
Implementation of avoidance measures provided in Section 6.5 will reduce the potential for impacts
to coastal California gnatcatcher, least Bell's vireo, and nesting birds.
5.4.3 Special-Status Bat Species
During the bat survey, approximately 12 Yuma myotis (SA) individuals were identified within the
crevices between the concrete beams of the ECR Bridge. Although the following foliage-roosting bat
species were not observed or detected during the biological resources assessment or the bat survey,
there is a moderate potential for them to occur within the trees in the BSA: western red bat (SSC),
hoary bat (SA), and western yellow bat (SSC). Activities performed close to the bridge crevices have
the potential to affect Yuma myotis individuals temporarily, especially if activities are performed
during the bat maternity season (April 1 through August 31). Clearing/disturbance of trees have the
potential to affect the foliage-roosting species directly through the loss of suitable roosting habitat
and all bat species could be indirectly affected by impacts associated with activities that generate
high amounts of vibration, noise, or possible night lighting. Implementation of avoidance measures
provided in Section 6.5 will reduce the potential for impacts to special-status bat species.
5.5 HMP COVERED SPECIES
Coastal California gnatcatcher and least Bell's vireo are the only HMP Covered Species with a • moderate or higher potential to occur within the BSA. Impacts to coastal sage scrub and riparian
scrub-coastal California gnatcatcher and least Bell's vireo habitat, respectively-have the potential
to affect these species directly through the temporary loss of suitable habitat and indirectly through
impacts associated with noise and dust during construction. Implementation of avoidance measures
provided in Section 6.5 will reduce the potential for impacts to coastal California gnatcatcher and
least Bell's vireo.
5.6 NARROW ENDEMIC SPECIES
The results of the literature and database records search indicate the potential occurrence of 12
Narrow Endemic species. However, based on the results of the biological resources assessment,
none of these species is expected to occur within the BSA due to the absence of suitable habitat.
Furthermore, no Narrow Endemic species were observed in the BSA during the biological resources
assessment. The project is not expected to affect any Narrow Endemic species.
5.7 U.S. FISH AND WILDLIFE SERVICE CRITICAL HABITAT AREAS
Critical habitat for thread-leaved brodiaea, coastal California gnatcatcher, San Diego thorn-mint, and
southwestern willow flycatcher is approximately 0.8 mile southeast, 1.5 miles south, 2.1 miles east,
and 2.5 miles east of the BSA, respectively. Due to the distances from the BSA, no designated critical
habitat will be affected by the proposed project activities.
5.8 WILDLIFE MOVEMENT CORRIDORS
The northern half of the BSA serves as a migration corridor for wildlife species, as wildlife can move
along the banks and within Agua Hedionda Creek under the ECR Bridge. Project-related activities
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have the potential to deter wildlife movement under the bridge during active construction;
however, during off hours, wildlife movement will be unaffected.
5.9 AQUATIC RESOURCES
Figure 5 displays the anticipated impacts to aquatic resources within the BSA on an aerial
photograph. Tables G, H, and I display the total areas of potential impacts to Corps/RWQCB, CDFW,
and CCC wetlands, respectively.
Table G· Potential Impacts to Corps and RWQCB Jurisdictional Waters of the U S ..
Wetland Waters Non-Wetland Waters Total Corps Jurisdiction
Linear {Square Feet) (Square Feet) (Square Feet)
Feature Feet Temporary Permanent Temporary Permanent Temporary Permanent
Drainage and 10 . 130 . 130 0
Associated Terraces
.
Table H: Potential Impacts to COFW Jurisdiction
Streambed/Banks and Riparian Vegetation
(Square Feet) Total CDFW Jurisdiction
Feature Temporary Permanent (Square Feet}
Drainage and Associated Riparian
Vegetation 130 0 130
Table I: Potential Impacts to CCC Wetlands
CCC Wetlands
(Square Feet} Total CCC Wetlands
Feature Temporary I Permanent (Square Feet)
Drainage and Associated Riparian/Marsh Vegetation 130 I 0 130
P·\HCRl\KJS -ECR ot Connon Rd lmprovemont<\BTR\ECR Br;d11e BTR_Rov_Juno2020_Clean.doc• 106/17 /201 23
B,o,oo,c" RESOU,CES T,cHN'CAL REPORT
REvtsEO JUNE 2020
El CAMINO R,AL AT CUNO~ Ro,o INHAS,CTION IMe,ov,M,~TS PaCJECT
c,n OF CARLSBAD, CALlfCANIA
SECTION 6.0: HMP COMPLIANCE
6.1 REDUCTION OF IMPACTS TO VEGETATION COMMUNITIES
6.1.1 Temporary Impacts
LSA
Temporary impacts to coastal sage scrub and nonnative grassland will be revegetated with native
hydroseed mixes. Temporary impacts to riparian scrub and freshwater marsh will result from the
placement of scaffolding for sidewalk overhang construction; however, because these activities will
be of short duration and low-impact, vegetation is expected to grow back. Temporary impacts to
unvegetated stream channel and open water will result from the placement of scaffolding for
sidewalk overhang construction. These areas are unvegetated and will require no revegetation.
Temporary impacts to ornamental and developed land do not require revegetation; however, non-
invasive replacement ornamental trees will be planted in affected ornamental areas.
6.1.2 Permanent Impacts
Table J displays the appropriate mitigation (as described in the HMP) and anticipated mitigation
totals for permanent impacts to vegetation communities.
Table J: HMP-Required Mitigation for Permanent Impacts to Vegetation
Communities
Permanent
HMP-Requlred Mitigation Impacts Required HMP Habitat
Vegetation Community Ratio (Square Feet) Mitigation Group
Nonnative Grassland 0.5:1 540 270 E
Ornamental NA 2,002 NA F
Developed NA 1,916 NA NA
Total 4,458 270
Due to the small amount of permanent impacts to nonnative grassland (540 square feet), the city
will achieve the HM P's mitigation requirement for impacts to this vegetation community by planting
270 square feet of native grassland or other appropriate native plant species on site where
ornamental vegetation is currently present.
6.2 REDUCTION OF IMPACTS TO SPECIAL-STATUS SPECIES
6.2.1 Special-Status Plant Species
A few scattered San Diego marsh-elder individuals were observed on the banks of Agua Hedionda
Creek under the canopy of the riparian scrub west of ECR. No other special-status plant species were
observed during the biological resources assessment. Due to the absence of suitable habitat for the
other special-status plant species and due to the absence of conspicuous perennial special-status
plant species other than San Diego marsh-elder, there is a low potential for impacts to special-status
plant species as a result of project-related activities. To further reduce the potential for impacts to
San Diego marsh-elder, a biologist should flag individuals of this species near work areas or access
Pc\HCRI905 -ECR ot C.nnon Rd lmprnvements\8TR\ECR Bridg@ BTR_Rev_June2020_Cleon docx (06/17 /20) 25
B10L0~1CAL RE>OU,CES TECHNICAL REPO•T
REV1HO JUNE 2020
h c, .. ,uo REAL AT CANNON ROAD INTERsEC.,ON IMPROVEMeN•S P•oJECJ
en, OF CARLSBAD, c,11,oRNIA LSA
paths for avoidance. Additionally, pertinent information about this species (e.g., description,
location, and reason for avoidance) should be included in an environmental awareness training
program to be provided to all project personnel. Because no impacts are expected to occur to
special-status plant species, no mitigation for these species is required.
6.2.2 Special-Status Invertebrate Species
Although there is a moderate potential for monarch butterfly to roost within the eucalyptus trees
present within the BSA, impacts to this species' roosting sit.es will be avoided to the greatest extent
practicable by having a biologist perform a presence/absence survey for monarch butterfly prior to
disturbance/removal of eucalyptus trees. The biologist will survey the tree(s) to be affected and an
appropriately-sized surrounding buffer. If any Monarch butterfly roosting sites are identified, tree
disturbance/removal will be prohibited until roosting is no longer observed. Because no impacts are
expected to occur to monarch butterfly or any other special-status invertebrate species, no
mitigation for these species is required.
6.2.3 Special-Status Avian Species and Nesting Migratory Birds
Impacts to coastal California gnatcatcher, least Bell's vireo, and nesting birds protected under the
MBTA will be avoided to the greatest extent practicable either by conducting vegetation disturbance
outside of the typical bird breeding season (i.e., between September 16 and January 14), or by
having a biologist perform a nesting bird survey within the proposed construction area and a 300-
foot buffer no more than 72 hours prior to vegetation disturbance during the bird breeding season.
lfthe planned vegetation disturbance does not occur within 72 hours of the nesting bird survey,
then the area would be resurveyed. If nesting birds are found, then the qualified biologist should
establish an adequate buffer zone (on a species-by-species, case-by-case basis) in which
construction activities are prohibited until the nest is no longer active. The size of the buffer zone is
determined by the biological monitor based on the amount, intensity, and duration of construction,
and can be altered based on site conditions. If appropriate, as determined by the biological monitor,
additional monitoring of the nesting birds may be conducted during construction to ensure that
nesting activities are not disrupted. If any active coastal California gnatcatcher or least Bell's vireo
nests are identified, then the project biologist will consult with the USFWS for direction on
appropriate buffer zone radius for avoidance. Because no impacts are expected to occur to special-
status avian species or nesting migratory birds, no mitigation for these species is required.
6.2.4 Special-Status Bat Species
Impacts to special-status bat species will be avoided to the greatest extent practicable by having a
bat specialist conduct a survey prior to construction activities to determine the need for humane
eviction or other avoidance and minimization measures. Additionally, conducting tree removal or
construction activities adjacent to the bridge outside of the bat maternity season (i.e., September 1
through March 31); ensuring that possible night lighting only be used on the portion of the bridge
structure actively being worked on and that the lighting be focused on the direct area of work; and
ensuring that airspace access to and from the bat roost features is not obstructed except at direct
work areas would further reduce the potential for impacts to these species. With employment of
P .\HCR1905 -ECR 01 Cannon Rd lmprovement,\BTR\ECR Bridge BTR_Rev_Juno2020_Clean.docx (06/17 /20) 26
BIOLOGICAL R'50U<CH T,co<N,CAL Re,on
R,vis,o Ju•• 2020
EL CA ... INO RH." CANNON ROAO IMHR>ECTION lr.,,,o,, ... ,NlS P,o,,CT
Cm OF CARLSOAO, CALIFORNIA LSA
these avoidance and minimization measures, impacts to special-status bat species will be avoided
and no mitigation for these species is expected to be required.
6.2.5 HMP Covered Species
Coastal California gnatcatcher and least Bell's vireo are HMP Covered Species. The project is not
expected to result in impacts to coastal California gnatcatcher or least Bell's vireo because
vegetation disturbance is anticipated to take place outside of the bird breeding season. However, in
the event that vegetation clearing and grubbing must occur during the bird breeding season, a
qualified biologist will perform a nesting bird survey prior to vegetation disturbance to determine if
coastal California gnatcatcher, least Bell's vireo, or any other birds or their nests are present. If any
active coastal California gnatcatcher or least Bell's vireo nests are identified, then the project
biologist will consult with the USFWS for direction on appropriate buffer zone radius for avoidance.
Because no impacts are expected to occur to coastal California gnatcatcher or least Bell's vireo, no
mitigation for these species is required.
6.2.6 Narrow Endemic Species
Due to the absence of suitable habitat, no Narrow Endemic species were observed during the
biological resources assessment and none has a moderate or higher potential to occur within the
BSA. The project is not expected to affect any Narrow Endemic species; therefore, no mitigation is
required for Narrow Endemic species.
6.3 REDUCTION OF IMPACTS TO JURISDICTIONAL RESOURCES
Temporary impacts are expected to occur to areas potentially subject to the jurisdiction of resource
agencies; therefore, consultation will be required from the Corps, the RWQCB, the CDFW, and the
CCC for this project. Permits from these agencies will be required based on staff evaluation of
impacts. Because these impacts will be temporary and low-intensity (associated with the placement
of scaffolding for sidewalk overhang construction on top of vegetation/ground) mitigation is not
expected to be required.
6.4 COMPLIANCE WITH HMP COASTAL ZONE STANDARDS
All projects within the Coastal Zone are required to comply with HMP Coastal Zone Standards 7-1
through 7-14 (HMP Section D). Compliance with these standards is described below.
• 7-1: Environmentally Sensitive Habitat Areas (ESHA). No ESHAs are present within the BSA.
• 7-2: Coastal Sage Scrub. Under this standard, properties containing coastal sage scrub located in
the Coastal Zone shall conserve a minimum of 67 percent of the coastal sage scrub and 75
percent of the coastal California gnatcatchers on site. No coastal sage scrub within the Coastal
Zone will be affected by project-related activities. Only coastal sage scrub east of ECR (outside of
the Coastal Zone) will be temporarily affected by project-related activities. No coastal California
gnatcatchers are expected to be affected by project-related activities.
• 7-3: Oak Woodland. No oak woodland is present within the BSA.
p ,\HCR1905 . ECR ot Cannon Rd lmprov.ements\BTR\ECR Brldgo BTR_Re,_June2020_Cloon docx (06/17 /20) 27
BIOLOGICAL Resou•c" TEC•NICAL REPOOf
Rev,s,o JUNE 2020
El C~MINO REAL AT CA•NON RoAO INT,,S,CTJON IMPRO,EMrnrs P•o,<CT
Cl"if OF (ASLSOAD, CACIFORNIA LSA
• 7-4: Streams. Agua Hedionda Creek is within the BSA. Temporary impacts will result from
construction crew pedestrian access and the placement of scaffolding for sidewalk overhang
construction within the creek.
• 7-5: Ephemeral Drainages and Ephemeral Streams. No ephemeral drainages or ephemeral
streams are present within the BSA.
• 7-6: Wetlands. CCC wetlands are present within the BSA. Short-term, low-intensity impacts to
wetlands will result from the placement of scaffolding for sidewalk overhang construction on
top of the vegetation/ground.
• 7-7: Wetland Mitigation Requirements. Because wetlands are expected to be temporarily
affected by low-intensity activities (placement of scaffolding for sidewalk overhang construction
on top of the vegetation/ground), no wetland mitigation is required.
• 7-8: No Net Loss of Habitat. No coastal sage scrub within the Coastal Zone will be affected by
project-related activities. Only coastal sage scrub east of the ECR right-of-way (outside of the
Coastal Zone} will be temporarily affected by project-related activities.
• 7-9: Upland Habitat Mitigation Requirements. No coastal sage scrub within the Coastal Zone
will be affected by project-related activities. Only coastal sage scrub east of ECR right-of-way
(outside of the Coastal Zone) will be temporarily affected by project-related activities. No
mitigation is required.
• 7-10: Highly Constrained Properties. The proposed project is not constrained by any ESHA.
• 7-11: Buffers and Fuel Modification Zones. Because no mitigation is proposed, no buffer is
necessary.
• 7-12: Grading and Landscaping Requirements. The project will be designed to avoid conducting
grading activity during the rainy season (October 1 to April 1); however, it is understood that
construction may be extended into the rainy season with the approval of the City engineer and
with the implementation of special erosion control measures designed to prohibit discharge of
sediments off site. All graded areas shall be revegetated prior to October 1 to reduce erosion
potential.
• 7-13: City-Owned Lands Adjacent to Macario Canyon and Veterans Memorial Park. These
standards are not applicable to this project.
• 7-14: Other Parcels-Specific Habitat Protection Standards. These standards are not applicable
to this project.
6.5 AVOIDANCE AND MINIMIZATION MEASURES
In order to avoid or minimize impacts to existing biological resources, LSA recommends the
following measures during project implementation:
• A biologist will prepare an Environmental Awareness Training Program to be provided to all
project personnel prior to commencement of project-related activities. The program will contain
information concerning special-status plant, wildlife, and aquatic resources, including, but not
P:\HCR1905 -ECR at cannon Rd lmprovement>\BTR\ECR Bridge BTR_Rev_J~ne2020_0e~n.docx I00/17 /20) 28
BIOLOGIUl Ruoc•c" TErnNICAl REPORt
Re,isrn Jo•• 2020
El CAMINO REAL AT CANNON Ro,o INTE.SHTION IMPROVEMENTS P,OJ>CT
CITY 0, CARLSOAD, CALIFORNIA LSA
limited to, descriptions, locations of suitable habitat, reasons for avoidance, and avoidance and
minimization measures.
• The contractor will install orange construction fencing (or similar) along the perimeter of the
proposed Temporary Impact Areas to demarcate limits of work clearly. A biologist will be
present during this activity to direct that impacts to vegetation outside of the proposed
Temporary Impact Areas and bird nests (if fence installation occurs between January 15 and
September 15) are avoided.
• A biologist will flag San Diego marsh-elder individuals near work areas or access paths for
avoidance.
• A biologist will perform a presence/absence survey for monarch butterfly prior to disturbance/
removal of eucalyptus trees. The biologist will survey the tree(s) to be affected and an
appropriately-sized surrounding buffer. If any Monarch butterfly roosting sites are identified,
tree disturbance/removal will be prohibited until roosting is no longer observed.
• If vegetation disturbance is scheduled to occur during the bird breeding season (between
January 15 and September 15), a biologist will perform a nesting bird survey within the
proposed construction area and appropriately-sized buffer no more than 72 hours prior to
vegetation disturbance. If the planned vegetation disturbance does not occur within 72 hours of
the nesting bird survey, then the area will be resurveyed. If nesting birds are found, then the
qualified biologist will establish an adequate buffer zone (on a species-by-species, case-by-case
basis) in which construction activities would be prohibited until the nest is no longer active. The
size of the buffer zone is determined by the biological monitor based on the amount, intensity,
and duration of construction, and can be altered based on site conditions. If appropriate, as
determined by the biological monitor, additional monitoring of the nesting birds may be
conducted during construction to ensure that nesting activities are not disrupted. If any active
coastal California gnatcatcher or least Bell's vireo nests are identified, then the project biologist
will consult with the USFWS for direction on appropriate buffer zone radius for avoidance.
• A bat specialist will conduct a survey prior to construction activities to determine the need for
humane eviction or other avoidance and minimization measures.
• Tree removal or construction activities adjacent to the bridge will be conducted outside of the
bat maternity season {April 1 through August 31) to the greatest extent practicable.
• If nighttime work is necessary during construction, then LSA recommends that night lighting
only be used on the portion of the bridge structure actively being worked on, that the lighting
be focused on the direct area of work, and that airspace access to and from the bat roost
features not be obstructed except at direct work areas.
• All vehicles, equipment, tools, and supplies will stay within the limits of the Temporary Impact
Areas, but no vehicles, equipment, tools, or supplies will be placed within the Agua Hedionda
Creek or its associated riparian vegetation. Only the temporary placement of the scaffolding
associated with sidewalk overhang construction will be placed on top of vegetation/ground
within the creek.
• BMP features (e.g., silt fencing, straw wattles, and gravel bags) will be installed where necessary
to prevent off-site sedimentation.
Pc\HCR1905 ECR al Connon Rd lmprovemen!>\BTR\ECR Sndge BTR_Rev_June2020_Clean.doc, (06/17 /WI 29
610,oGICAL Resouac,; T''"""" REPORT
Re.ism JuN, 2020
Ee CAMINO REAL AJ CANNON ROAD INHRSECTIO~ l,,e,O,fMENTS PR0JOCT
(lfy 0, C .. lSOAO, CAUFO,NIA LSA
• Equipment refueling will occur in an upland area far enough away from the creek to prevent
contamination of waters.
P:\I-ICR1905 -ECR at Cannon Rd lmprovements\BTR\ECR Bridge BTR_ Rev_Jur,e2020_Clean,doe• (06/17 /W) 30
B,oLOOIC.C Rescu,CES TH•NIC.C RteCRT
REVISED JuNe 2020
El CAMINO REAL AT CANNON Ro,c INTERSECTION IMPAOV{M,-TS PROJECT
Cir-OF c""""· CA<iro,NIA LSA
SECTION 7.0: REFERENCES
California Department of Fish and Wildlife (CDFW). 2014. RareFind Version 5.2.6, Records search
executed in December 2014, covering the United States Geological Suivey 7.5-minute series
topographic map, San Luis Rey, California quadrangle. Resource Management and Planning
Division. Biogeographic Data Branch, Natural Diversity Database. Sacramento, California.
California Native Plant Society, Rare Plant Program. 2014. Inventory of Rare and Endangered Plants
of California (on line edition, vS-03 0.38). Website http://www.rareplants.cnps.org [accessed
December 2014}.
City of Carlsbad. November 2004. Habitat Management Plan for Natural Communities in the City of
Carlsbad.
Crother, B.I. ed. 2012. Scientific and Standard English Names of Amphibians and Reptiles of North
America North of Mexico. Herpetologica/ Circular 39.
Hickman, J.C., ed. 1993. The Jepson Manual: Higher Plants of California. University of California
Press, Berkeley and Los Angeles, CA. 1,400 pp.
Holland, R.F. 1986. Preliminary Descriptions of the Terrestrial Natural Communities of California.
State of California, The Resources Agency, Department of Fish and Wildlife, Natural Heritage
Division, Sacramento, California.
LSA Associates, Inc. November 2015. Jurisdictional Delineation Report, El Camino Real at Cannon
Road Intersection Improvements Project, City of Carlsbad, San Diego County, California.
LSA Associates, Inc. January 2016. Fall/Winter Season Nighttime Bat Suivey at the El Camino Real
Bridge over Agua Hedionda Creek, City of Carlsbad, San Diego County, California.
Lichvar, R.W., M. Butterwick, N.C. Melvin, and W.N. Kirchner. 2014. The National Wetland Plant List:
2014 Update of Wetland Ratings. Phytoneuron 2014-41: 1-42. Published April 2, 2014. ISSN
2153 733X.
Munsell Color. 2000 (rev. ed.). Munsell Soil Color Charts. Macbeth Division of Kollmorgen
Instruments Corporation, New Windsor, NY.
North American Butterfly Association. 2001. NABA checklist and English Names of North American
Butterflies, Second Edition, North American Butterfly Association, Morristown, New Jersey;
see http://www.naba.org/pubs/checklst. html.
Oberbauer, Thomas, Meghan Kelly, and Jeremy Buegge. March 2008. Draft Vegetation Communities
of San Diego County. Based on "Preliminary Descriptions of the Terrestrial Natural
Communities of California," Robert F. Holland, Ph.D., October 1986.
P:\llCftl~5 , ECR ot Con=n Rd lmpro~m@nts\BTR\ECR Brldg@ BTR_Rev_Junei□20_Clean.doc< [06/17 /20) 31
B10,co1tAL Resou,ces TECHNICAL REPORT
R,vi,rn J,Nf 2020
EL CAMINO REAL AT (ANNON ROAD INHR"CTION IMPRGVEMENTS PROJECT
C1n Of c'""""· CAuFO•N1A LSA
Paulson, D. 2009. Dragonflies and Damselflies of the West, Princeton University Press, Princeton,
New Jersey.
Rebman, J.P., and M.G. Simpson. 2006. Checklist of the Vascular Plants of San Diego County, 4th
Edition. San Diego. Natural History Museum, San Diego, California.
Stebbins, R.C., and S.M. McGinnis. 2012. Field Guide to Amphibians and Reptiles of California,
Revised Edition, University of California Press, Berkeley.
Technology Associates (TAIC). September 30, 2008. Guidelines for Biological Studies. City of
Carlsbad, California.
United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS).
2013. Soil Survey Staff, Natural Resources Conservation Service, United States Department
of Agriculture. Official Soil Series Descriptions. Online: http://soils.usda.gov/technical/
classification/osd/index.html.
Pc\HCR1905 -ECR at Cannon Rd lmprovements\BTR\ECll Br,dge BTR_Rev_June2020_Clean.docx (06/17 /20) 32
B,o,o~,CAL R,soaocES r,c,N•CAL R"o,r
R,v,;,o JuNE 2020
EL (AMINO REAL AT CANNON RC>Ao INH,SECTION IMPSOV,MENT5 P,oi,CT c,n OF C"lSOAO, (,CIFO,NIA
APPENDIX A
SITE PHOTOGRAPHS
P·\HCR1905. ECR al Cannon Rd lmpro""m~nt<\BTR\ECR Bridge BTR_Rev_June2020_Cl•an.docx 106/17/20)
LSA
BIOLOGICSl RESOURCES TEC"NICSL REPORT
R,visrn JON[ 202□
EL C•M.NO RE<L AT (A~NCN ROAD INTERS,CTION IMPROVEM,NTS PROJECC
CIT, OF CARLSBAD, CAUFOANIA
APPENDIX B
VASCULAR PLANT SPECIES OBSERVED
Pc\HCR1905 -ECR at Cannon Rd lmprov•m•nts\BTR\ECR Brodgo BTR_Re,_Juno2020_Clean.docx {06/17 /201
LSA
BIOLOGICA> R,sou,ces T,cHNoCAL R(PORT
R<V"'D JUNE 1010
EL CAMINO REAL" CANNON Ro,o l~n,;,cTION IMPAO'IEM"" PRO!ECT
c,n o, '""""· '""o'"'' LSA
The following vascular plant species were observed within the BSA by LSA during the biological
surveys.
VASCULAR PLANT SPECIES OBSERVED
Scientific Name Common Name
Pinaceae Pine family
Pinus sp. Pines
Anacardiaceae Sumac family
Schinus terebinthifo/ius (nonnative species} Brazilian peppertree
Toxicadendron diversi/obum Pacific poison oak
Apiaceae Carrot family
Apium angustifolium Wild celery
Asteraceae Sunflower family
Baccharis pilularis Coyote brush
Bacchoris sa/icifo/io Mule fat
Helminthotheca echioides (nonnative species) Bristly ox-tongue
lsocama menziesii Goldenbush
Iva hayesiana San Diego marsh-elder
Pluchea odorata Sweetscent
Sonchus asper (nonnative species) Prickly sow thistle
Brassicaceae Mustard family
Hirschfe/dio incano (nonnative species) Shortpod mustard
Chenopocliaceae Saltbush family
Solicornio pacifica Virginia glasswort
Euphorbiaceae Spurge family
Ricinus cammunis (nonnative species) Castor bean
Fabaceae Pea family
Acacia sp. (nonnative species) Acacia
Medicago polymorpho (nonnative species) Bur-clover
Myrtaceae Myrtle famlly
Eucalyptus sp. (nonnative species) Eucalyptus
Plantaginaceae Plantain family
Plantaga Jancealoto (nonnative species) English plantain
Salicaceae wmowfamily
Salix /aevigata Red willow
Salix /asia/epis Arroyo willow
Urticaceae Nettle Family
Urtico diaica Stinging nettle
Arecaceae Palm family
Washingtonia robusta (nonnative species} Mexican fan palm
Juncaceae Rush family
Juncus mexicanus Mexican rush
P:\HCR1905 -ECR at Cannon Rd lmprc,ernent,\6TR\!aCR B,;Oge 0TR_Rov_Juno2020_Clun.Ooc, 16/17/2020) B-1
B10,MICAL RESou,c,S TECHNICAL R,eo,r
R,visrn JUNE 2020
E, CAMINO R,., AT CANNON Ro•o INTSRSECTION IMPROVEM,NTS PROJECT
(IH o, C•scso•o, CALIFORN1•
VASCULAR PLANT SPECIES OBSERVED
Scientific Name Common Name
Poaceae Grass family
Arundo donax (nonnative species) Giant reed
Cynodon dacty/on (nonnative species) Bermuda grass
Dist/ch/is spicata Saltgrass
Typhaceae Cattail family
T ypha latifo/ia Broad leaf cattail
LSA
Taxonomy and scientific nomenclature generally conform to Hickman (1993). Common names for each taxa generally conform to the
Checklist of the Vascular Plants of San Diego County (Simpson and Rebman 2006).
Pc\HCR190S -CCR ot Cannon Rd lmprovemonts\BTR\ECR Bridie Brn_Roe_June2020_Clean.doc> (6/17/2020) B-2
BIOLOGICAL Resou,c,s TECHNICAL REP OAT
R>vl5ED JuN, 2020
E, C•MING Re•L AT CANNON ROAD '""'"CTIO" IM,.ov<•HNTS PROJ<CT
c,n o, c,,cse,o, C•wo••••
APPENDIX C
WILDLIFE SPECIES OBSERVED
P·\HCR1905 -ECR o! Connon Rd lmprovements\8TR\ECR B,idge BTR_Rev_June2020_ Cleon.doc• (6/17/20201
LSA
B•OLOGICAL ResouRte< TECHNICAL R"ORT
RfVISEO JuNE 2020
EL CAMINO Re,, AT CANNON Ro,o l~TERSECTION IMPROVEM<NTS P,oJSCT
CIH O> CARLSMO, CAUFOR~a LSA
This is a list of the conspicuous aerial insects, reptiles, birds, and mammals noted in or adjacent to
the BSA by LSA during the biological surveys. Presence may be noted if a species is seen or heard, or
identified by the presence of tracks, scat, or other signs.
WILDLIFE SPECIES OBSERVED
Scientific Name Common Name
AVES BIRDS
Accipitridae Kites, Hawks, and Eagles
£/onus /eucurus White-tailed kite
Columbidae Pigeons and Doves
Zenaida macrouro Mourning dove
Trochilidae Hummingbirds
Calypte onno Anna's hummingbird
Corvldae Crows and Ravens
Corvus brachyrhynchos American crow
Mimidae Mockingbirds and Thrashers
Mimus po/yglottos Northern mockingbird
Emberizidae Emberizines
Me/ozone crissolis California towhee
Fringi11idae Finches
Corpodacus mexiconus House finch
CHIROPTERA BATS
Vespertilionidae Evening Bats
Myotis yumanensis Yuma myotis
Molossidae Free-tailed bats
Tadorido brosiliensis Mexican free-tailed bat
Taxonomy and nomenclature are based primarily on the following:
Birds; American Ornithologists' Union (1998, The A.O.U. Checklist of North American Birds, Seventh Edition, American Ornithologists'
Union, Washington D.C.; and supplements; see http://www.aou.org/checklist/north/inde~.php).
P;\HCR1905 -ECR •t Cannon Rd lmpro,,..ment>\BTR\ECR Bridge BTR_Rev_June2020_ Clean.docx (6/17/2020) C-1
BIOLOGICAL Re,ou,CES T,c,",cAL R"o"
R,visrn Ju•E 2020
EL CAMl"O REAL AT CA~"CN ROAO l.r,'5ECTION IM,,OVEM<hTS PROJECT c,n OF C•RLSOAO, CA<IFO,NIA
APPENDIX D
JURISDICTIONAL DELINEATION REPORT
P;\HCR19D5 • ECR at Cannon Rd lmprovom.,,ts\BTR\ECR Bridge BTR _Ro,_Jun@2D20_Clean.docx (6/17/2020)
LSA
JURISDICTIONAL DELINEATION REPORT
EL CAMINO REAL AT CANNON ROAD INTERSECTION IMPROVEMENTS PROJECT
CITY OF CARLSBAD
SAN DIEGO COUNTY, CALIFORNIA
Prepared for:
Brandon Miles, P.E., T.E.
Associate Engineer
City of Carlsbad
1635 Farady Avenue
Carlsbad, California 9008
(760) 602-2730
Prepared by:
Jaime Morales, Senior Biologist
LSA
703 Palomar Airport Road, Suite 260
Carlsbad, California 92011
(760) 931-5471
LSA Project No. HCR1402
LSA
November 2015 I Revised March 2020
Ju,ISOICTIONAL DELINEATIO" Reoon
R,vis,o MARCH 2020
EL CA,"N0 RfAL AT CANNON ROAD INT,.SECTION IM"O"MeNTS POOJHT
CAOLS,AO, Cstl'ORNIS
TABLE OF CONTENTS
·~
INTRODUCTION ...................................................................................................................................... 1
PROPOSED PROJECT ............................................................................................................................... 1
SITE DESCRIPTION ................................................................................................................................... !
REGULATORY BACKGROUND .................................................................................................................. 3
United States Army Corps of Engineers ........................................................................................... 3
Wetlands .......................................................................................................................................... 5
California Department of Fish and Wildlife ..................................................................................... 8
Regional Water Quality Control Board ............................................................................................ 9
METHODOLOGY ...................................................................................................................................... 9
RESULTS ................................................................................................................................................ 10
Vegetation ...................................................................................................................................... 11
Soils ................................................................................................................................................ 15
Hydrology ....................................................... : .............................................................................. 16
CONCLUSIONS ...................................................................................................................................... 17
Potential Corps and RWQCBJurisdiction ....................................................................................... 17
Potential CDFW Jurisdiction ........................................................................................................... 17
REFERENCES ......................................................................................................................................... 18
FIGURES
Figure 1: Project Location ...................................................................................................................... 2
Figure 2: Potential Corps and CDFW Jurisdictional Areas .................................................................... 12
Figure 3: Site Photographs ................................................................................................................... 13
TABLES
Table A: Hydrophytic Vegetation ........................................................................................................... 6
Table B: Potential Corps and RWQCB Jurisdictional Waters of the U.S. within the Study Area .......... 17
Table C: Potential CDFW Jurisdiction within the Study Area .................. Error! Bookmark not defined.
APPENDICES
A: COPY OF WETLAND DETERMINATION DATA FORMS
B: ARID WEST EPHEMERAL AND INTERMITTENT STREAMS OHWM DATASHEET
C: FUNCTION AND VALUES ANALYSIS
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INTRODUCTION
EL CAMINO REAC AT CANNON ROAO INTERsecr,oN IMPRO,eMSNTS PROJSCT
CARLSBAO, CALIFORNIA IC
This report presents the results of a jurisdictional delineation conducted by LSA. The report
summarizes the results of fieldwork conducted to identify the limits of potential waters of the
United States subject to the jurisdiction of the United States Army Corps of Engineers (Corps) and
Regional Water Quality Control Board (RWQCB) pursuant to Sections 404 and 401 of the Federal
Clean Water Act (CWA), respectively; streambeds, water bodies, and associated habitat subject to
California Department of Fish and Wildlife (CDFW) regulation pursuant to the California Fish and
Game Code, and aquatic resources subject to California Coastal Commission (CCC) regulation
pursuant to the California Coastal Act. LSA surveyed an approximately 1.8-acre study area located in
the City of Carlsbad (City), San Diego County, California (Figure 1). This report has been prepared for
the City for purposes of identifying aquatic resource limits for design consideration with the intent
of minimizing and avoiding impacts to aquatic resources to the greatest extent feasible, and for
submittal to the Corps, CDFW, RWQCB, and CCC as part of their review of applications for permit
authorization, if project impacts trigger the need for such permits.
This routine wetland and jurisdictional delineation was conducted under contract with the City. The
findings and conclusions presented in this report, including the location and extent of aquatic
resources subject to regulatory jurisdiction, represent the professional opinion of LSA and should be
considered preliminary until verified by representatives of the Corps, CDFW, RWQCB, and CCC.
PROPOSED PROJECT
The City proposes to improve pedestrian and vehicular operations across the Agua Hedionda Creek
Bridge at the intersection of El Camino Real and Cannon Road in the City of Carlsbad, San Diego
County, California (Figure 1). Major components of the proposed project include sidewalk
improvements, bridge and barrier rail improvements, and constructing a new pedestrian bridge
across Agua Hedionda Creek along the eastern edge of El Camino Real.
Project-related activities will remain compliant with all State and Federal agencies and permits
associated with the project.
SITE DESCRIPTION
The study area is within the City, at the intersection of El Camino Real and Cannon Road,
approximately 2.4 miles east of Interstate 5 along Cannon Road (latitude: 33.149180, longitude: -
117.297093). Specifically, the study area encompasses areas at the northeastern and southeastern
corners of the intersection of El Camino Real and Cannon Road, classified by United States
Geological Survey (USGS) Unsectioned Land-grant: Agua Hedionda, Township 12 South, and Range 4
West, of the San Luis Rey, California 7.5-minute topographic quadrangle map.
The study area contains a section of Agua Hedionda Creek, which supports various plant and wildlife
species. The northern section (north of El Camino Real) of the study area is dominated by
ornamental vegetation. Native habitats, such as riparian scrub, freshwater marsh, and coastal sage
scrub are present in the southern section {south of El Camino Real). The section of the creek
underneath the bridge is completely unvegetated.
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The study area is within the South Coast subregion of the Southwestern California region of the
California Floristic Province, characterized by valleys and small hills extending from the coast inland
to the foothills of the Transverse and Peninsular Mountain ranges.
The study area is within the Carlsbad Hydrologic Unit (HU) (Carlsbad Watershed), which is
approximately 210 square miles extending from the headwaters above Lake Wolhford in the east to
the Pacific Ocean in the west, and from Vista and Oceanside in the north to Solana Beach,
Escondido, and the community of Rancho Santa Fe to the south. The Cities of Carlsbad, San Marcos,
and Encinitas are entirely within this watershed. There are numerous important surface hydrologic
features within the Carlsbad Watershed, including four unique coastal lagoons, three major creeks,
and two large water storage reservoirs. The HU contains four major, roughly parallel hydrologic
areas (HAs). Encompassing the study area is the San Marcos (904.2) HA and the Batiquitos
hydrologic subarea (HSA) according to the Water Quality Control Plan for the San Diego Basin -
Region 9 (State of California 2007). The average annual rainfall for the study area is approximately
11.13 inches.1
REGULATORY BACKGROUND
United States Army Corps of Engineers
The Corps regulates discharges of dredged or fill material into waters of the United States (WOTUS).
These waters include wetland and non-wetland bodies of water that meet specific criteria. Corps
regulatory jurisdiction pursuant to Section 404 of the Federal Clean Water Act {CWA) is founded on
a connection, or nexus, between the water body in question and interstate commerce. This
connection may be direct (through a tributary system linking a stream channel with traditional
navigable waters used in interstate or foreign commerce) or may be indirect (through a nexus
identified in Corps regulations).
For several decades, the operable definition of WOTUS was provided at 33 Code of Federal
Regulations (CFR) 328.3, but implementation of this definition has been shaped by the courts and
subsequent guidance over the years, most substantially by the 2001 Supreme Court decision in Solid
Waste Agency of Northern Cook County v. United States Army Corps of Engineers, No. 99-1178
(SWANCC) and the 2006 Supreme Court decision in the consolidated cases Rapanos v. United States
and Corabel/ v. United States (126 5. Ct. 2208), collectively referred to as Rapanos. The Supreme
Court concluded that wetlands are WOTUS if they significantly affect the chemical, physical, and
biological integrity of other covered waters more readily understood as navigable.
Based, in part, on the Rapanos decision, a new rule defining WOTUS was promulgated in the Federal
Register on June 29, 2015. Following a series of legal challenges and the current presidential
administration's attempt to delay the implementation of this rule, on August 16, 2018, the U.S.
District Court for the District of South Carolina enjoined the delay of the WOTUS Rule
implementation for failure to comply with the Administrative Procedure Act. This decision made the
http://www.idcide.com/weather/ca/carlsbad.htm, January 5, 2015.
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2015 WOTUS definition effective in 26 states where federal district court judges did not stay it,
including California.
However, pursuant to an Executive Order signed on February 28, 2017, "Restoring the Rule of Law,
Federalism, and Economic Growth by Reviewing the 'Waters of the United States Rule,"' the Corps
and EPA had embarked on a two-step process to revise the definition of WOTUS. The first step was
to repeal the 2015 WOTUS definition and revert to the operative definition that was shaped by
previous regulations and subsequent court decisions. The Federal Register notice that effected this
repeal was published on October 22, 2019, with an effective date of December 23, 2019. On
February 14, 2019, as the second step of the comprehensive two-step process, the Corps and EPA
proposed to interpret WOTUS to encompass: Traditional navigable waters, including the territorial
seas; tributaries that contribute perennial or intermittent flow to such waters; certain ditches;
certain lakes and ponds; impoundments of otherwise jurisdictional waters; and wetlands adjacent to
other jurisdictional waters. The public comment period for the proposed revised definition of
WOTUS closed on April 15, 2019, and the agencies are reviewing and considering approximately
620,000 comments they received. If finalized, the revised definition of WOTUS will replace the
regulations that the agencies finalized in the October 22, 2019, Federal Register.
Given the substantial changes in operable definitions that have occurred and may continue to occur
considering the regulatory revisions and potential court actions, it is not possible to predict the
regulations that will be in place at the time of a particular jurisdictional determination by the Corps.
Therefore, this jurisdictional delineation focuses on identifying the boundaries of potentially
jurisdictional water bodies, utilizing methods for determining the locations of ordinary high water
mark (OHWM) and wetland boundaries as described below. These methods for determining the
boundaries of water bodies in general have not substantially changed over the years and are not
likely to change with revised regulations. This delineation can then be used in combination with a
companion jurisdictional analysis to determine which of the identified water bodies is actually
jurisdictional, based on the definition that is in effect at the time of a jurisdictional determination by
the Corps. In some cases it may be possible to identify water bodies that are likely or unlikely to be
jurisdictional under any scenario, i.e., based on the 2015 WOTUS definition, previous regulations
and Ropanos guidance, or proposed regulations.
Any definition is likely to include the following categories of waters:
(i) All watecs which ace rnrrently osed, wece used in the past, or may be susceptible to use
in interstate or foreign commerce, including all waters which are subject to the ebb and
flow of the tide;
(ii) Alt interstate waters, including interstate wetlands;
(iii) The territorial seas;
(iv) All impoundments of waters otherwise identified as waters of the United States;
(v) Tributaries of waters identified in paragraphs (i) through (iii) above; however the
definition of tributary, based on the nature and amount of flow, is subject to change as
regulations are revised; and
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(vi) Wetlands adjacent to any of the above.
I C:
Similarly, certain water bodies are likely to be excluded, pursuant to one of the following: 1) specific
rules; 2) the preamble to the 1986 regulations; 3) the SWANCC decision; or 4) Ropanos guidance;
examples include:
(i) Isolated waters;
(ii) Artificial, ephemeral ditches, excavated on dry land and draining only uplands;
(iii) Erosional features that do not meet the definition of tributary;
(iv) Storm water control features created in dry land;
(v) Artificial reflecting pools or swimming pools and ornamental waters; and
(vi) Incidental depressions created in dry land.
As applicable, waters in the above categories are noted in this delineation; the relationships of
waters in other categories likely to be jurisdictional waters are also noted, but without speculation
as to their future jurisdictional status.
The Corps typically considers any body of water displaying an OHWM for designation as WOTUS.
Subject to the applicable definition of WOTUS, Corps jurisdiction over nontidal WOTUS extends
laterally to the OHWM or beyond the OHWM to the limit of any contiguous wetlands, if present. The
OHWM is defined as "that line on the shore established by the fluctuations of water and indicated
by physical characteristics such as a clear natural line impressed on the bank, shelving, changes in
the character of soil, destruction of terrestrial vegetation, the presence of litter and debris, or other
appropriate means that consider the characteristics of the surrounding area" (33 CFR 328.3).
Jurisdiction typically extends upstream to the point where the OHWM is no longer perceptible.
Waters found to be isolated and not subject to CWA regulation may still be regulated by the RWQCB
under the State Porter-Cologne Water Quality Control Act (Porter-Cologne Act).
Wetlands
Wetland delineations for Section 404 purposes must be conducted according to the Regional
Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0)
(Regional Supplement) (Corps 2008) and the Corps of Engineers 1987 Wetland Delineation Manual
(1987 Manual) (Environmental Laboratory 1987). Where there are differences between the two
documents, the Regional Supplement takes precedence over the 1987 Manual.
The Corps and the United States Environmental Protection Agency (EPA) define wetlands as follows:
Those areas that are inundated or saturated by surface or groundwater at a frequency and
duration sufficient to support, and that under normal circumstances do support., a
prevalence of vegetation typically adopted to life in saturated soil conditions.
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In order to be considered a jurisdictional wetland under Section 404, an area must possess three
wetland characteristics: hydrophytic vegetation, hydric soils, and wetland hydrology. Each
characteristic has a specific set of mandatory wetland criteria that must be satisfied for that
particular wetland characteristic to be met. Several indicators may be analyzed to determine
whether the criteria are satisfied.
Hydrophytic vegetation and hydric soils indicators provide evidence that episodes of inundation
have lasted more than a few days or have occurred repeatedly over a period of years, but do not
confirm that an episode has occurred recently. Conversely, wetland hydrology indicators provide
evidence that an episode of inundation or soil saturation occurred recently, but do not provide
evidence that episodes lasted more than a few days or occurred repeatedly over a period of years.
Because of this, if an area lacks one of the three characteristics under normal circumstances, the
area is considered nonwetland under most circumstances.
Determination of wetland limits may be obfuscated by a variety of natural environmental factors or
human activities, collectively called difficult wetland situations, including cyclic periods of drought
and flooding or highly ephemeral stream systems. During periods of drought, for example, bank
return flows are reduced and water tables are lowered. This results in a corresponding lowering of
ordinary high water and invasion of upland plant species into wetland areas. Conversely, extreme
flooding may create physical evidence of high water well above what might be considered ordinary
and may allow the temporary invasion of hydrophytic species into nonwetland areas. In highly
ephemeral systems typical of Southern California, these problems are encountered frequently. In
these situations, professional judgment based on years of practical experience and extensive
knowledge of local ecological conditions comes into play in delineating wetlands. The Regional
Supplement provides additional guidance for difficult wetland situations.
Hydrophytic Vegetation
Hydrophytic vegetation is plant life that grows and is typically adapted for life in permanently or
periodically saturated soils. The hydrophytic vegetation criterion is met if more than 50 percent of
the dominant plant species from all strata (tree, shrub, herb, and woody vine layers) are considered
hydrophytic. Hydrophytic species are those included on the 2016 National Wetland Plant list
(lichvar et al. 2016) published by the Corps. Each species on the list is rated according to a wetland
indicator category, as shown in Table A.
Table A: Hydrophytic Vegetation
Category Probability
Obligate Wetland OBL Almost always occur in wetlands (estimated probability> 99%)
Facultative Wetland FACW Usually occur in wetlands (estimated probability 67-99%)
Facultative FAC Equally likely to occur in wetlands and nonwetlands (estimated probability 34-66%)
Facultative Upland FACU Usually occur in nonwetlands (estimated probability 67-99%)
Obligate Upland UPL Almost always occur in nonwetlands {estimated probability > 99%}
To be considered hydrophytic, the species must have wetland indicator status (i.e., be rated
Obligate Wetland [OBL], Facultative Wetland [FACW], or Facultative [FAC]).
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The delineation of hydrophytic vegetation is typically based on the most dominant species from
each vegetative stratum (strata are considered separately); when more than SO percent of these
dominant species are hydrophytic (i.e., FAC, FACW, or OBL), the vegetation is considered
hydrophytic. In particular, the Corps recommends the use of the "50/20" rule (also known as the
dominance test) from the Regional Supplement for determining dominant species. Under this
method, dominant species are the most abundant species that immediately exceed 50 percent of
the total dominance measure for the stratum, plus any additional species comprising 20 percent or
more of the total dominance measure for the stratum. In cases where indicators of hydric soil and
wetland hydrology are present but the vegetation initially fails the dominance test, the prevalence
index must be used. The prevalence index is a weighted average of all plant species within a
sampling point. The prevalence index is particularly useful when communities only have one or two
dominants, where species are present at roughly equal coverage, or when strata differ greatly in
total plant cover. In addition, Corps guidance provides that morphological adaptations may be
considered when determining hydrophytic vegetation when indicators of hydric soil and wetland
hydrology are present (Corps 2006). If the plant community passes either the dominance test or
prevalence index after reconsidering the indicator status of any plant species that exhibit
morphological adaptations for life in wetlands, then the vegetation is considered hydrophytic.
Hydric Soils
Hydric soils1 are defined as soils that formed under conditions of saturation, flooding, or ponding
long enough during the growing season to develop anaerobic conditions in the upper part.2 Soils are
considered likely to meet the definition of a hydric soil when one or more of the following criteria
are met:
1. All Histels except Folistels and Histosols except Folists;
2. Soils that are frequently ponded for a long duration or very long duration3 during the growing
season; or
3. Soils that are frequently flooded for a long duration or very long duration during the growing
season.
Hydric soils develop under conditions of saturation and inundation combined with microbial activity
in the soil that causes a depletion of oxygen. While saturation may occur at any time of year,
microbial activity is limited to the growing season, when soil temperature is above biologic zero (the
soil temperature at a depth of 50 centimeters, below which the growth and function of locally
adapted plants are negligible). Biogeochemical processes that occur under anaerobic conditions
during the growing season result in the distinctive morphologic characteristics of hydric soils. Based
on these criteria and on information gathered from the National Soil Information System (NASIS)
The hydric soils definition and criteria included in the 1987 Manual are obsolete. Users of the 1987 Manual are
directed to the United States Department of Agriculture (USDA) NRCS website for the most current information
on hydric soils.
Current definition as of 1994 (Federal Register, July 13, 1994).
"Long duration" is defined as a single event lasting from 7 to 30 days; qvery long duration" is defined as a single
event that lasts longer than 30 days.
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database, the United States Department of Agriculture's Natural Resources Conservation Service
(NRCS) created a Soil Data Access (SDA) Hydric Soils list that is updated annually.
The Regional Supplement has a number of field indicators that may be used to identify hydric soils.
The NRCS (2017) has also developed a number of field indicators that may demonstrate the
presence of hydric soils. These indicators include hydrogen sulfide generation, accumulation of
organic matter, and the reduction, translocation and/or accumulation of iron and other reducible
elements. These processes result in soil characteristics that persist during both wet and dry periods.
Separate indicators have been developed for sandy soils and for loamy and clayey soils.
Wetland Hydrology
Under natural conditions, development of hydrophytic vegetation and hydric soils is dependent on a
third characteristic: wetland hydrology. Areas with wetland hydrology are those where the presence
of water has an overriding influence on vegetation and soil characteristics due to anaerobic and
reducing conditions, respectively (Environmental Laboratory 1987). The wetland hydrology criterion
is satisfied if the area is seasonally inundated or saturated to the surface for a minimum of 14
consecutive days during the growing season in most years (Corps 2008).
Hydrology is often the most difficult criterion to measure in the field due to seasonal and annual
variations in water availability. Some of the indicators that are commonly used to identify wetland
hydrology include visual observation of inundation or saturation, watermarks, recent sediment
deposits, surface scour, and oxidized root channels (rhizospheres) resulting from prolonged
anaerobic conditions.
California Department of Fish and Wildlife
The CDFW, through provisions of the California Fish and Game Code (Sec. 1600 et seq.), is
empowered to issue agreements for any alteration of a river, stream, or lake where fish or wildlife
resources may be adversely affected. Streams {and rivers) are defined by the presence of a channel
bed and banks and at least an intermittent flow of water. The CDFW regulates wetland areas only to
the extent that those wetlands are part of a river, stream, or lake as defined by the CDFW. Also, the
CDFW typically does not regulate estuaries below the mouth of a tributary river or stream.
In obtaining CDFW agreements, the limits of wetlands are not typically determined. The reason for
this is that the CDFW generally includes, within the jurisdictional limits of streams and lakes, any
riparian habitat present. Riparian habitat includes willows, mule fat, and other vegetation typically
associated with the banks of a stream or lake shorelines and may not be consistent with Corps
definitions. In most situations, wetlands associated with a stream or lake would fall within the limits
of riparian habitat. Thus, defining the limits of CDFW jurisdiction based on riparian habitat will
automatically include any wetland areas and may include additional areas that do not meet Corps
criteria for soils and/or hydrology (e.g., where riparian woodland canopy extends beyond the banks
of a stream away from frequently saturated soils).
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Regional Water Quality Control Board
EL CAMINO R,M AT C•N~ON Roso INHRS,CTION IMeR~V"'H~TS PrnJ>CT
CARLSOAO, CALIFOANIA I C:
The RWQCB is responsible for the administration of Section 401 of the CWA and the State Water
Resources Control Board Porter-Cologne Water Quality Control Act (Water Code Section 13260).
Section 401 of the CWA specifies that certification from the State is required for any applicant
requesting a Federal license or permit to conduct any activity including, but not limited to, the
construction or operation of facilities that may result in any discharge into navigable waters. The
Porter-Cologne Act requires "any person discharging waste, or proposing to discharge waste, within
any region that could affect the waters of the State" to file a report of discharge. Typically, the areas
subject to RWQCB jurisdiction coincide with those of the Corps (i.e., waters of the U.S., including any
wetlands).
California Coastal Commission
The CCC, through provisions of the California Coastal Act, is empowered to issue a Coastal
Development Permit (CDP) for many projects located within the Coastal Zone. In areas where a local
entity has a certified Local Coastal Program {LCP), the local entity {e.g., City of Carlsbad) can issue a
CDP only if it is consistent with the LCP. The CCC, however, has appeal authority for portions of the
LCPs and retains jurisdiction over certain public trust lands and in areas without an LCP.
The CCC's definition of wetlands, as defined in Section 30121 of the Coastal Act and Title 14, Section
13577 of the CCC's regulations, is distinctly different from the Corps definition of wetlands.
According to the CCC's regulations, wetlands are defined as "land where the water table is at, near,
or above the land surface long enough to promote the formation of hydric soils orto support the
growth of hydrophytes." Both definitions focus on three fundamental wetland characteristics:
hydrology, soils, and vegetation. However, while the Corps definition requires the existence of all
three wetland characteristics for an area to be considered a wetland, the CCC's definition of
wetlands is based on the existence of only one characteristic: wetland hydrology sufficient to either
support a prevalence of hydrophytic vegetation or promote the formation of hydric soils (exceptions
include certain areas that lack wetland soils and vegetation). Under certain circumstances, reliable
indicators of all required characteristics are not necessarily apparent, and areas may be delineated
as wetlands by the Corps on the basis of indicators of only two of the three characteristics. The CCC
routinely makes jurisdictional wetlands determinations based on the presence of one characteristic
indicator (i.e., wetland soils or vegetation) under the assumption that wetland hydrology must be
present in order for the indicator to be present. Nevertheless, the presence of wetland hydrology
during some portion of most years is fundamental to the existence of any wetland, and the CCC will
sometimes disregard vegetation or soil indicators when sufficient evidence exists to conclusively
refute the presence of wetland hydrology.
METHODOLOGY
LSA Biologists Jaime Morales and Scott Batchelder performed the jurisdictional delineation fieldwork
on December 10, 2014. LSA prepared a field map of the area to be surveyed using a 2014 aerial
photograph base at a scale of 1 inch= 56.25 feet. The study area was surveyed on foot, and all areas
of potential jurisdiction were evaluated according to Corps and CDFW criteria. Data were recorded
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using a Global Positioning System (GPS) unit with sub-meter accuracy and directly on the field map,
particularly where GPS reception was limited due to dense tree canopies.
LSA evaluated areas supporting hydrology or species of plant life potentially indicative of wetlands
according to routine wetland delineation procedures described in the Regional Supplement.
Representative sample points were selected and examined in the field in those areas where wetland
jurisdiction was in question or needed to be confirmed. At each sample point, the dominant and
subdominant plant species were identified and their wetland indicator status (Uchvar et al. 2014)
noted. A small sample pit (approximately 15-20 inches deep) was dug at each point in order to
examine soil characteristics and composition. Soil matrix colors were classified according to the
Munsell Soil Color Charts (Munsell Color 2000). Hydrological conditions, including any surface
inundation, saturated soils, groundwater levels, and/or other wetland hydrology indicators, were
recorded. General site characteristics were also noted. Standard data forms were completed for
each sample point; copies of these data forms are included in Appendix A of this report.
LSA performed a follow-up site visit on April 30, 2018, to assess the study area for any changes to
aquatic resources. No significant changes to the limits or classifications of aquatic resources were
observed. LSA visited the site on April 22, 2019, to again assess the study area for any changes to
aquatic resources and to prepare an Arid West Ephemeral and Intermittent Streams OHWM
datasheet to determine the limits of the OHWM of the creek. No significant changes to the limits or
classifications of aquatic resources were observed during this visit.
RESULTS
Within the study area, a segment of Agua Hedionda Creek flows from northeast to southwest in a
developed area. The creek flows unobstructed beneath the Agua Hedionda Creek Bridge.
Additionally, hydrophytic vegetation and hydric soils occur at the southeastern corner of the study
area. This area does not receive flows from Agua Hedionda Creek; rather, it is at a similar elevation
to the creek and the hydrophytic vegetation is likely supported by a high water table. A vegetated
berm and unpaved access road separate this area from Agua Hedionda Creek. LSA presumes that a
hydraulic connection exists between Agua Hedionda Creek and the area dominated by hydrophytic
vegetation that is outside of the OHWM. Based on the hydraulic connection (i.e., hydrology),
prevalence of hydrophytic vegetation, and presence of hydric soils, LSA considers this area to be
wetland waters of the United States that are adjacent to Agua Hedionda Creek.
Agua Hedionda Creek ultimately flows to the Pacific Ocean (a Traditional Navigable Water of the
U.S.). Because of the direct connection with the Pacific Ocean, this feature is subject to Corps
jurisdiction to the OHWM and adjacent wetlands. The areas mapped as wetlands meet all three
criteria for wetland waters of the U.S.: wetland hydrology, hydric soils, and dominance of
hydrophytic plant species. However, based on recent guidance from Corps staff, areas within the
OHWM that meet all three criteria for wetland waters of the U.S. are mapped as nonwetland waters
of the U.S. Streambed and banks, including riparian scrub vegetation associated with this drainage
feature, are subject to CDFW jurisdiction. Because the western half of the study area (west of the
eastern edge of the El Camino Real right-of-way) is within the Coastal Zone, areas west of the
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eastern edge of the El Camino Real right-of-way that are subject to CDFW jurisdiction are considered
CCC Wetlands.
Functions and values for this feature were determined to have a moderate to high significance in
terms of resources. Figure 2 depicts the location of this feature and Figure 3 shows site conditions.
The wetland determination data forms {Appendix A) contain full descriptions of the results of each
sample point, while the Arid West Ephemeral and Intermittent Streams OHWM datasheet (Appendix
B) describes the OHWM of the feature. Appendix C describes and evaluates the functions and values
of the feature within the study area.
Vegetation
The study area contains the following vegetation communities and land uses: riparian scrub,
freshwater marsh, coastal sage scrub, ornamental vegetation, unvegetated stream channel, open
water, disturbed land, developed areas, and bare ground. The hydrophytic vegetation criterion for
Corps jurisdictional wetlands is satisfied when there is a prevalence of wetland vegetation. Areas
identified in this report as wetlands are dominated by wetland vegetation and are subject to Corps
(outside of the OHWM), CDFW, and CCC jurisdiction. Drainage-associated riparian scrub vegetation
occurring beyond the stream bank is also subject to CDFW and CCC jurisdiction.
Within the study area, wetland vegetation was only present south of the Agua Hedionda Creek
Bridge. Freshwater marsh, dominated by broadleaf cattail (Typha /atifo/ia OBL), and to a lesser
extent by salt grass (Distich/is spicata FAC), pickleweed (Sa/icornia virginica OBL), salty Susan
(Jaumea camosa OBL), and Mexican rush (Juncus mexicanus FACW), was observed within the
drainage, while riparian scrub, dominated by arroyo willow (Salix /asio/epis FACW), Goodding's black
willow (Salix gooddingii FACW), red willow (Salix /aevigata FACW), mule fat (Baccharis saficifolia
FACW), and Brazilian pepper tree (Schinus terebinthifo/ius FAC), was observed on the banks.
Wetland vegetation was also present at the southeastern corner of the study area. Although this
area does not receive flows from Agua Hedionda Creek, it is at a similar elevation to the creek and a
high water table likely supports the broadleaf cattail-dominated freshwater marsh and riparian
scrub habitats.
North of the Agua Hedionda Creek Bridge, the terraces on either ~ide of the open water are
unvegetated due to frequent inundation; therefore, these areas were classified as unvegetated
stream channel because they were still within the bounds of the stream banks and OHWM. Beyond
the areas designated as unvegetated stream channel (upslope), upland vegetation (nonnative
grassland), dominated by Bermuda grass (Cynodon dacty/on FACU), burclover (Medicago
polymorpha FACU), and cheeseweed (Malva parviflora FACU) was present. Additionally, Mexican fan
palm (Washingtonia robusta FACW) sprouts were abundant in this area. Some of the areas
vegetated by nonnative grassland showed evidence of flooding, such as drift deposits and matted
vegetation. The OHWM was extended to include these areas within the active floodplain that
inundate during high discharge events.
P:\liCR1905 • ECR at Canrion Rd lmp,0Vt!ment>\JD\JD_Rep011_FIMl_revMarch2020.doc, «3/30/2020• 11
Ju•ISDOCTION<l DHINEATION R,eo,r
R,v,s,o MARCH 2020
Soils
El CAMINO REAL" CSNSON RoAD INTERSECTICN IMPROV<M,HS P•O.HT
CARLSBAD, CAclFORN,. I C:
The Soil Survey for the San Diego Area, California, Part I (Soil Conservation Service 1973) Carlsbad,
California {San Luis Rey Quadrate) identifies and describes the soil expected to correspond to the
drainage within the study area as Sartell fine sand, 6 to 12 percent slopes (SbC) and Rim rock-Cave
complex (Rm).
Sample plots were taken within the study area above and below the observed OHWM where
wetland vegetation was present in order to identify the limits of potential jurisdictional areas.
Previously referenced Figure 2 depicts the locations of the sample plots.
Soil Pit (SP) 1 was dug in an eastern terrace of Agua Hedionda Creek, within unvegetated stream
channel and the creek's active floodplain. This sample plot was chosen because it had the potential
to meet the Corps' three criteria based on visual inspection. Soils within the pit consisted of sandy
loam and sand. The profile at this location included a layer that was approximately 3 inches thick,
with 100 percent of the matrix composed of the correct combination of hue, value, and chroma
(Munsell moist lDYR 3/2) to meet the hydric soils indicator Sandy Mucky Mineral (51), as outlined in
the Regional Supplement. Between 3 and 16 inches, 100 percent of the matrix was classified as
7.5YR 3/2. Although wetland hydrology was evident and hydric soils were present, the hydrophytic
vegetation criterion was not met due to the dominance of Bermuda grass (FACU), despite the
presence of Mexican fan palm sprouts (FACW).
SP 2 was also dug in the eastern terrace of Agua Hedionda Creek, south of SP 1 and slightly higher in
elevation than SPl, although still within the creek's active floodplain. This sample plot was also
chosen because it had the potential to meet the Corps' three criteria based on visual inspection.
Soils within the pit consisted of silty clay. The profile at this location included a layer that was
approximately 10 inches thick consisting of a uniform matrix (100 percent) classified as lOYR 3/2.
Soils within the pit did not display any hydric soils indictors. Although wetland hydrology was
evident, hydrophytic vegetation criterion was not met due to the dominance of Bermuda grass
(FACU), despite the presence of Mexican fan palm sprouts (FACW) and annual beard grass
(Pofypogon monspeliensis FACW).
SP 3 was also dug on the north side of the Agua Hedionda Creek Bridge, on the eastern bank of Agua
Hedionda Creek, slightly higher up the bank (outside of the active floodplain) in order to identify the
point at which hydric indicators were absent. Soils within the pit consisted of silty clay. The profile at
this location included a layer that was approximately 10 inches thick consisting of a uniform matrix
(100 percent) classified as lOYR 3/2. Between 10 and 16 inches, 95 percent of the matrix was
classified as lOYR 4/2 and the remaining S percent of the matrix was classified as 2.SYR 5/8. These
findings meet the Depleted Matrix (F3) hydric soils indicator, as outlined in the Regional
Supplement. Although analysis of this sample plot was not necessary because Sample Plots 1 and 2
were not within wetlands, it was chosen because it was clearly dominated by an upland ornamental
species, sea fig (Corpobrotus chifensis FACU). The point of this plot was to test for hydric soils and
wetland hydrology. Only hydric soils were present at this sample plot.
SP 4 was dug on the eastern bank of Agua Hedionda Creek {south of the Agua Hedionda Creek
Bridge) within the channel's active floodplain. Soils within the pit consisted of silty clay. The profile
P .\HCR1905 -!:CR at Cannon Rd lmpr<lvements\JD\JD _Rep<,rt_final_revMarch2020.doe>< •3/30/2020• 15
)USISOICTIDNAL Drn~,.,,oN R'"o"
REVIS<D MARCH 2020
£L CAMINO R<A. AT CAN No• ROAD INHAS,(TION IMPROVEMENTS P,o,HT
C.eLSBAo, CAL roSNIA I C:
at this location included a layer that was approximately 5 inches thick, with 100 percent of the
matrix identified as 10YR 2/2. Between 5 to 16 inches, 95 percent of the matrix was identified as
lOYR 4/2 and contained red ox features that were identified as lOYR 5/6. These findings meet the
Depleted Matrix (F3) hydric soils indicator, as outlined in the Regional Supplement. Vegetation in the
area was dominated by willow (Salix sp.) trees, and wetland hydrology was evident. Although this
sample plot meets the Corps' three wetland criteria, it is considered nonwetland waters of the U.S.
because it is within the OHWM. Although areas upslope and outside of the OHWM did contain
hydrophytic vegetation and hydric soils, wetland hydrology was no longer identified.
SP 5 was also dug on the eastern bank of Agua Hedionda Creek (south of the Agua Hedionda Creek
Bridge), slightly upslope from SP 4, outside of the OHWM. Soils within the pit consisted of sandy
texture. The profile at this location included a layer that was approximately 16 inches thick
consisting of a uniform matrix (100 percent) classified as lOYR 4/2. Soils within the pit did not
display any hydric soils indictors. This sample plot was chosen to demarcate the limit of wetland
hydrology beyond the OHWM. As it was slightly upslope from SP 4, wetland hydrology and hydric
soils were no longer present at this elevation, although a predominance of hydrophytic vegetation
was present.
SP 6 was dug south of El Camino Real; however, not within Agua Hedionda Creek. This pit was dug to
the east, beyond an unpaved access road and a patch of coastal sage scrub, on the border of the
coastal sage scrub and freshwater marsh habitats. Soils within the pit consisted of silty clay. The
profile at this location included a layer that was approximately 3 inches thick, with 100 percent of
the matrix identified as lOYR 3/2. Between 3 and 16 inches, 95 percent of the matrix was identified
as lOYR 4/2 and contained redox features that were identified as 2.SYR 4/8. These findings meet the
Depleted Matrix (F3) hydric soils indicator, as outlined in the Regional Supplement. This sample plot
was chosen because it appeared to be the boundary of areas that would meet the Corps' three
wetland criteria. Upon further analysis, this sample plot did mark the boundary of what the Corps
considers adjacent wetlands, as the wetlands occurred adjacent to the OHWM of Agua Hedionda
Creek. Another sample plot in this area was not necessary because upland vegetation (coastal sage
scrub) was present immediately upslope from SP 6.
Hydrology
Wetland hydrology was evident within Agua Hedionda Creek and to the east in the freshwater
marsh/riparian scrub habitat (surrounding SP 6). The following wetland hydrology indicators were
observed: water stained leaves (B9; a primary wetland hydrology indicator described in the Regional
Supplement), aquatic invertebrates (B13; a primary indicator), oxidized rhizospheres along living
roots (C3; a primary indicator), the presence of reduced iron (C4; a primary indicator), drainage
patterns (B10; a secondary indicator), thin muck surlace (C7; a secondary indicator), and drift
deposits (B3; a secondary indicator).
Pc\HCR190S -ECR at Cannon Rd lmprovern•nts\JD\JD _Report_final_revMotch2010 do0< «3/30/2020• 16
Ju,ISDICTIONAC 0WNEATIO• REPORT
R,v,,,o MARCH 2020
EL CAMINO R,AL AT CANNON RoAO INHRSECllDN IMPROVEMENTS P,o,ecr
CASL5BAD, CAll'ORNIA I C:
CONCLUSIONS
Potential Corps and RWQCB Jurisdiction
The drainage has a direct connection to designated navigable waters of the U.S. All areas within the
OHWM are considered nonwetland waters of the U.S. subject to Corps jurisdiction. While the
majority of the riparian corridor south of El Camino Real meets the Corps' three wetland criteria,
areas within the OHWM that meet all three wetland criteria are mapped as nonwetland waters of
the U.S. based on recent guidance from Corps staff. However, areas that meet all three wetland
criteria and are outside of the OHWM, such as the area east of Agua Hedionda Creek composed of
freshwater marsh and riparian scrub, are considered wetland waters of the U.S .. See Table B.
Table B· Potential Waters of the U.S. within the Study Area
Linear Wetland Waters Non-Wetland Waters Total Corps Jurisdiction
Feature Feet (Acres) (Acres) (Acres)
Agua Hedionda Creek and 240 0.40 0.59 0.98 Adjacent Wetlands
Potential CDFW Jurisdiction
All areas within the streambed and banks and any riparian scrub vegetation associated with the
drainage are considered to be subject to CDFW jurisdiction. See Table C.
Table C: Potential CDFW Jurisdiction within the Study Area
Streambed/Banks and Riparian Vegetation (Acres)
Feature
Agua Hedionda Creek and Adjacent Wetlands 1.16
Potential CCC Jurisdiction
The wetland hydrology within Agua Hedionda Creek and the adjacent wetland to the east is
sufficient to support a prevalence of hydrophytic vegetation and/or the formation of hydric soils.
Therefore, areas within the coastal zone (west of the eastern edge of the El Camino Real right~of-
way) that are subject to CDFW jurisdiction are considered CCC Wetlands. Table D displays the
acreages of potential CCC jurisdictional wetlands present within the study area.
Table D· Potential CCC Wetlands within the Study Area .
Feature CCC Wetlands (Acres)
Agua Hedionda Creek and Adjacent Wetlands 1.05
P:\HCR1905 • ECR at Connon Rd lmprovements\JD\JD_Repo<t_Final_revMarch2020.doc, •3/30/2020• 17
JURISDICflON<l DHINEATION REPORT
REVIS[O MARCH 2020
EL CAMINO REAL AT (ANNON ROAD lt<HRSEC,,ON IMPRO,EMENT> PRoJCCT
CARL5BAD, C•uro,N" ·~
REFERENCES
California Coastal Commission. 1981 (rev. ed.). Statewide Interpretive Guidelines.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report
Y-87-1. United States Army Engineer Waterways Experiment Station, Vicksburg, MS.
Federal lnteragency Committee for Wetland Delineation. 1989. Federal Manual for Identifying and
Delineating Jurisdictional Wetlands. United States Army Corps of Engineers, United States
Environmental Protection Agency, United States Fish and Wildlife Service, and United States
Department of Agriculture Soil Conservation Service, Washington, D.C. Cooperative Technical
publication. 76 pp. plus appendices.
Hickman, J.C., ed. 1993. The Jepson Manual: Higher Plants of California. University of California
Press, Berkeley and Los Angeles, CA. 1,400 pp.
Lichvar, R.W., M. Butterwick, N.C. Melvin, and W.N. Kirchner. 2014. The National Wetland Plant List:
2014 update of wetland ratings. Phytoneuron 2014-41: 1-42. Published 2 April 2014. ISSN 2153
733X.
Metz, V., and J. Dixon. 2006. Suggestions for Preparing a Wetland Delineation Report for the
California Coastal Commission.
Munsell Color. 2000 (rev. ed.). Munsell Soil Color Charts. Macbeth Division of Kollmorgen
Instruments Corporation, New Windsor, NY.
Soil Conservation Service. 1973. Soil Survey of the San Diego Area, California, Part I. United States
Department of Agriculture, Washington, D.C.
State Water Resources Control Board. Workplan: Filling the Gaps in Wetland Protection. September
2004.
United States Army Corps of Engi'neers. 1991. CECW-OR Memorandum: Questions and Answers on
the 1987 Manual.
United States Army Corps of Engineers. 1992. CECW-OR Memorandum: Clarification and
Interpretation of the 1987 Manual.
United States Army Corps of Engineers. 1999. Code of Federal Regulations. Title 33, Volume 3, Parts
200 to End. United States Government Printing Office.
United States Army Corps of Engineers. 2007. CECW-OR Memorandum: Clean Water Act Jurisdiction
Following the United States Supreme Court's Decision in Rapanos v. United States & Corabel/ v.
United States.
P;\HCR1905 -ECR •• Cannon Rd lmprovements\JD\)D_Report_Final_revMarch2020.d0<X •3/30/2020• 18
JUR'SDICTIONA< DHINEATION R»OaT
REvlSED MAAtH 2010
El CAMINO REAL AT CANNON ROAD INHRHCTION IMe.OV,MENlS POOJECT
CARLSBAD, CALIFORNIA I C:
United States Army Corps of Engineers. 2008. Regional Supplement to the Corps of Engineers
Wetland Delineation Manual: Arid West Region (Version 2.0). ed. J.S. Wakeley, R.W. Lichvar, and
CV. Noble. ERDC/EL TR-08-28. Vicksburg, MS: United States Army Engineer Research and
Development Center.
United States Department of Agriculture, Soil Survey Staff. 1975. Soil Taxonomy. Agriculture
Handbook No. 436. United States Government Printing Office, Washington, D.C. 754 pp.
Wetland Research and Technology Center. 1993. Draft Training Package, Wetland Delineator
Certification Program. Environmental Laboratory, EP-W, Vicksburg, MS.
P;\HCR190S -ECR al Cannon Rd lmprcvements\JD\JD _Report_Final_revMarch20W.dcCJC •3/30/20W» 19
JuRISD,CTIOHL DWN<ATION R>eoST
RlvlS(O MARCH 2020
h CAMINO REAL .r CANNON ROAO l~H,SECllON IMPAOVEMENTS PAOJECT
C;",OAO, CAc,FORNIA
APPENDIX A
COPY OF WETLAND DATA FORMS
P:\HCR1905 -ECR at Cannon Rd lmprovem•nts\JD\JD _Roport_Final_r~March2020 ~oCJ< •3/30/2020•
I
SOIL Sampling Point: (J)
Profile Descrip(lon: (Describe to the depth needed to document the Indicator or confirm the absence of Indicators.)
Deplh Miltll!. Redox Fegl!,!res
nadla:il ~IQC (lll2l1~ ____!i_ ~olor (mQ!stl ___..%.._ ....fu1L. ---1.2L n111!.!ca Remarks
o~-s tu vfl-3 2: _ff&. ---------~l-#..1"\ I
)-t !. '2.-5. tt ~ ---------¥A,,{ I
' ------------
---------
------------
------------
------------
---------
1Tvoe: <>Concentration D=Deoletion. RM=Reduced Matrix.. 2Location: PL=Pore Linlna, RC=Root Channel. M=Matrix.
Hydrlc Soll Indicators: (Appllcable to all LRRa, unless othe,wlse noted.) Indicators for ProblematJc: Hydric Soll,':
_ Histosol (A1) _ Sandy Redox (S5) _ 1 cm Muck (A9) (LRR C)
_ Hlstlc Eplpedon (A2) _ Stripped Matrix (S6) _ 2 cm Muck (A 10) (LRR B)
_ Black Hlstlc (A3) _ Loamy Mucky Mineral (F1) _ Reduced Vertie (F18)
_ Hydrogen Sulfide (A4) _ loamy Gleyed Matrix (F2) _ Red Parent Material (TF2)
_ Stratified Layers (A5) (LRR C) _ Depleted Matrix (F3) _ Other (Ex.plain in Remarks)
_ 1 cm Muck (A9) {LRR D) _ Redox Dark Surface {F6)
_ Depleted Below Dark Surface (A11} _ Depleted Dark Surface (F7}
_ Thick Dark Surface (A12} _ Redox Depressions (F8)
..)('.. Sandy Mucky Mineral (S1} _ Vernal Pools (F9} 3Indicators of hydrophytic vegetation and
Sandy Gleyed Matrix (S4} wetland hydrology must be present
Restrictive Layer (If present):
Type: ✓ Depth {Inches): Hydric Soll Present? Yes No -Remarks:
~cc,,,v,. ~j,1,-,.ft.'J....,_.).. rt-~-\.r k-Yih\J· ~
HYDROLOGY
Wetland Hydrology Indicators: §econdl!O! IO!ll!.mQ!i !Z 2l'. !!!Qlll r1m11i~l
Prims!JY Indicators (1ny: one indicator is sufficl~tl _ Water Marks (81) {Riverine)
_ Surface Water (A 1} _ Salt Crust (B 11) _ Sediment Deposits (B2) (Riverine)
_ High Water Table {A2) _ Biotic Crust (B12) ~rift Deposits (83) (Riverine)
_ Saturation {A3) ~Aquatic Invertebrates {B13) _ Drainage Patterns (B10)
_ Water Marks (B 1 ){Nonrlverlne) _ Hydrogen Sulfide Odor (C1) _ Dry-Season Water Table (C2}
_ Sediment Deposits {B2) (Nonrtverlne} _ Oxidized Rhizospheres along Uvlng Roots (C3) _ Thin Muck Surface (C7)
_ Drift Deposits (B3) (Nonrlverine) _ Presence of Reduced Iron (C4} _ Crayfish Burrows (CS)
_ Surface Soil Cracks (86) _ Recent Iron Reduction In Plowed Soils (C6) _ Saturation Visible on Aerial Imagery (C9}
_ Inundation Visible on Aerial Imagery {87) _ Other (Explain in Remarl<.s) _ Shallow Aquitard (D3)
~ Water-Stained Leaves (B9) _ FAC-Neutral Test (D5)
Field Observations:
Surface Weter Present? Yes __ No L_ Depth (inches):
Water Table Present? Yes __ No~ Depth (inches): Yu ✓ Saturation Present? Yes _j._ No __ Depth {Inches): Wetland Hydrology Present? No --(Includes capillarv frinae)
Describe Recorded Date {stream gauge, monitoring well, aerial photos, previous inspections), If available:
Remarks:
'
WETLAND DETERMINATION DATA FORM -Arid West Region
Project/Site: C{ l'.'lh"lt·...., Q ~~ IM,,,µt.1•••,t-~1h;· City/County: Q......k,b0,,0, ,_<;o.,, n>r~\1.-, Sampling Date: f'2-/fofa'-{
ApplicanUOwner: (A;i t1t" /c,·A '>W: . State: IA SampllngPoint:_a)-=----
lnvestlgator(s): 5 {] ,-\f\ Section, Township, Range: \MSH-d: • NJ-Jl\'l.1-..P l'l-.S , ~ LI ..,.I
Landfonn (hlllslope, terrace, etc.): 'furo,,µ, Local relief (concave, convex, noQe): /lk,,..J Slope (%): Z
Subregion (LRR): ______________ Lat: 33.-1'-¥i 1./ h > Long: I t:7 . "2..-'l ~788 Datum: ___ _
Soil Map Unit Name: 12..,µ., .-\>t.~ -t~ ~~ j 51Sx\.!.J.J, '4 "'-:l,. ~x NWl classification: ________ _
Are climatic/ hydrologic conditions on the site typical fo~is time of year? Yes / No ___ (If no, explain in Remarks.)
Are VegetaUon __ , Soll ___, or Hydrology ___ significantly disturbed? Are "Normal Circumslances" present? Yes / No
Are Vegetation __ , Soil ___ , or Hydrology ___ naturally problematic? (If needed, explain any answers in Remarks.)
SUMMARY OF FINDINGS -Attach site map showing sampling point locations, transects, important features, etc.
, ..
No_c Hydrophytic Vegetation Present? Yes ---Is the Sampled Area
Hydric Soil Present? Yes No_.:L within a Wetland? Yes No /
WeUand Hydrology Present? Yes v' No ---------
Remarks:
VEGETATION
Absolute Dominant Indicator Dominance Test workshfft:
Tr!2§ §lrat!,!m (Use scientific names.) "{q Co~[ Species?~ Number of Dominant Species () 1. That Are OBL, FACW, or FAC: (A)
2. Total Number of Dominant
3. Species Across All Strata: ( (B}
4.
Total Cover:
Percent of Dominant Species 0
Sapllno/Sbwb SIG!IYm
Thal Are OBL, FACW, or FAC: (A/B)
1. Prevalence Index worksheet:
2. IQ!al 0/ii ~Q~r gf: M1,111i111Y. b~:
3. OBL species x1=
4. FACW species )C 2 ~
5. FAC species x3-
Total Cover: FACU species x4=
Herb Stratum UPLspecies x5=
1. aw~A a~s-so y fAcv Column Totals: (A) (B)
2. },Jo. -5b , .,.._ i~~I e.. l 11b1 ta c._,~ 'l.-II/ -r:Al.\J
3. /-11.ff~(:flat 1,-. Mu(jO~ -,~l •~ -z_ N FAcvl Prevalence Index = BIA=
,1 • Hydrophytlc Vegetation Indicators: 4.
5. -Dominance Test Is >50%
6. -Prevalence Index is S3.01
7. _ Morphological Adaptations' (Provide supporting
8. data in Remarks or on a separate sheet)
Total Cover. 71 _ Problematic Hydrophytic Vegetation' (Explain)
W229.y_ Vi[l§: Slr!!lll!I!
1. 'Indicators of hydric soil and wetland hydrology must
2. be present.
Total Cover: Hydrophytlc
t../ ft. Vegetation ✓ % Bare Ground in Herb Stratum % Cover of Biotic Crust Present? Yes ---No
Remarks:
US Army Corps of Engineers Arid West -Version 11-1-2006
SOIL Sampling Point:~(}).,... __ _
Profile Description: (Describe to the depth needed to document the Indicator or confirm the absence of Indicators.)
Depth Matrix Redox Eeatures
finches} !:;2!2!:!m2i:ill ~ Color !m2i§tl _L_ ...TufilL. ~ I!llfil!r!! Remarks
0-I~ lO. YR 7/.z.. _m ------~-,~t½
---------
------------
---------
------------
------------
------------
------------
'T11oe: C:Concentralion, D=Dellletlon, RM=Reduced Matrix. 2Location: PL=Pore Linina, RC=Root Channel, M=Matrix.
Hydrlc Soll Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydrlc Soi1s3:
_ Histosol (A1) _ Sandy Redox (SS) __ 1 cm Muck (A9) (LRR C)
_ Histic Eplpedon (A2) _ Stripped Matrix (S6) _ 2 cm Muck (A10) (LRR B)
_ Black Hlstlc (A3) _ Loamy Mucky Mineral (F1) _ Reduced Vertie (F18)
_ Hydrogen Sulfide (A4) _ Loamy Gleyed Matrix (F2) _ Red Parent Material (TF2)
_ Stratified Layers (A5) (LRR C) _ Depleted Matrix (F3) _ Other (Explain in Remarks)
_ 1 cm Muck (A9) (LRR D) _ Redox Dark Surface (F6)
_ Depleted Below Dark Surface (A 11) _ Depleted Dark Surface (F7)
_ Thick Dark Surface (A12) _ Redox Depressions (F8)
_ Sandy Mucky Mineral (S1) _ Vernal Pools (F9) 31ndlcators of hydrophytic vegetation and
_ Sandy Gleyed Matrix (S4) wetland hydrology must be present.
Restrictive Layer (If present):
Type:
Depth (inches): Hydrlc Soll Present? Yes ---No_L_
Remarks:
HYDROLOGY
Wetland Hydrology Indicators: §eron!;!~!:ll lngjcatQm {2 Q! !llQ~ rggj.!l[~}
Prlma!Y Indicators {any one Indicator Is sufficient} _ Water Marks (B1) (Riverine)
_ Surface Water (A 1) _ Salt Crust (B 11) _ Sediment Deposits (82) (Riverine)
_ High Water Table (A2) _ Biotic Crust (B12) _ Drift Deposits (83) (Riverine)
_ Saturation (A3) ~quatic Invertebrates (B13) _ Drainage Patterns (B10)
_ Water Marks (B1) (Nonrlverlne) _ Hydrogen Sulfide Odor (C1) _ Dry-Season Water Table (C2)
_ Sediment Deposits (B2) (Nonrlverlne) ..Z Oxidized Rhizospheres along Living Roots (C3) _ Thin Muck Surface (C7)
_ Drift Deposits (B3) (Nonrlverlne) _ Presence of Reduced Iron (C4) _ Crayfish Burrows (CB)
_ Surface Soil Cracks (B6) _ Recent Iron Reduction in Plowed Soils (C6) _ Saturation Visible on Aerial Imagery (C9)
7'nundatlon Visible on Aerial Imagery (87) _ Other (Explain in Remarks) _ Shallow Aqultard (D3)
_ Water-Stained Leaves (B9) _ FAC-Neutral Test (DS)
Field Observations:
Surface Water Present? Yes __ No.£ Depth (Inches):
Water Table Present? Yes --No ../ Depth (inches): J Saturation Present? Yes __ No!£..__ Depth (inches): Wetland Hydrology Present? Yes No ------(includes caoillarv frinae)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Inspections), if available:
Remarks:
US Army Corps of Engineers Arid West-Version 11 -1-2006
SOIL Sampling Point _@)_3.._ __
Profile Description: (Describe to the depth needed to document the Indicator or conflnn the absence of Indicators.)
Depth Matrix Redox Fea11,1tes
(ingbes} Color (mgl;ll ~ Color (molsl) ~...!mL.. Loc2 T!!is!Yr!! Re!lllrkl
0-10 bJ VI{ S'2 JEE_ ------<fi.,ltf'=k !i
rO-l c.,. J.J:j.JL. fb-_%_ '2. • c;y/L 5/1 ~ ,, I I '
------
---------
---------
---------
---------
---------
---------
1TVflA: C;ConcenlraUon. D=Deotetlon, RM=Reduced Matrix. 2Location: PL=Pore Linina, RC=Root Channel M=Matrtx.
Hydrlc Soll Indicators: (Appllc:■ble to all LRRs, unless otheiwlse noted.) Indicators for Problematic Hydric Solts3:
_ Hlslosol (A1) _ Sandy Redox (S5) _ 1 cm Muck (A9) {LRR C)
_ Hlstic Eplpedon (A2) _ Stripped Matrix (S6) _ 2 cm Muck (A10) (LRR B)
_ Black Histic (A3) _ Loamy Mucky Mineral (F1) _ Reduced Vertie (F18)
_ Hydrogen Sulfide (A4) _ Loamy Gleyed Matrix (F2) _ Red Parent Material {TF2)
_ Stratified Layers (A5) (LRR C) _?oepteted Matrix {F3) _ Olher(Explain in Remarks)
_ 1 cm Muck {A9) (LRR D) _ Redox Dari< Surface (F6)
_ Depleted Below Dark Surface (A 11) ·-Depleted Dark Surface (F7)
_ Thick Dark Surface (A12) _ Redox Depressions (F8)
_ Sandy Mucky Mineral (S1) _ Vemal Pools (F9) 3lndlcators of hydrophytic vegetation and
Sandy Gleyed Matrix (S4) wetland hydrology must be present
Restrictive Layer (If pr ... nt):
Type: ✓ Depth (Inches): Hydrlc Soil Present? Yes No -Remarks:
(.,,) I J.H,, r>f... c.. <.,(.t"' .,J:74~._ f-It.; thd Qr'··--.'-'O •• f l"TJ b t\.,.o1_,..).
1 ~kr-<-nj)v, (.. -Sa,;/~ ().lit f ,·v)-.,...A t:..,>/ l,. .... ,)N ... V•?•,-
rv-,.o-l,,ro)i,v .s /
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators fany one indicstor 15 sufficient}
Secondary Indicators 12 or more reguir!!dl
_ Water Marks (B1) (Riverine)
_ SurfaceWater(A1) _ SaltCrust(B11)
_ High Water Table (A2) _ Biotic Crust (B12)
_ Sediment Deposits (B2) (Riverine)
_ Drift Deposits (B3) (Riverine)
_ Saturation (A3) _ Aquatic Invertebrates (B13) _ Drainage Pa,ttems (B10)
_ Water Marks (B1) (Nonriverlne) _ Hydrogen Sulfide Odor (C1) _ Dry•Season Water Table (C2)
_ Sediment Deposits (B2) (Nonrlverlne)
_ Drift Deposits (B3) (Nonrlvertne)
_ Oxidized Rhizospheres along Living Roots (C3) _ Thin Muck Surface (C7)
_ Presence of Reduced Iron (C4) _ Crayfish Burrows (CS)
_ Surface Soll Cracks (B6) _ Recent Iron Reduction in Plowed Soils (C6) _ Saturation Visible on Aerial Imagery (C9)
_ Inundation Visible on Aerial Imagery (B7)
Water-Stained Leaves. (89)
_ Other (Explain in Remarks) _ Shallow Aquitard (D3)
_ FAG-Neutral Test (DS)
Field ObMrvatlon1:
Surface Water Present?
Water Table Present?
✓ Yes __ No✓--Depth (Inches): ____ _
Yes __ No Depth (inches): ____ _
Yes __ No ✓ Depth(inches): ____ _ Wetland Hydrology Present? Yes __ Saturation Present?
/includes caplllarv frinae)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Inspections), if available:
Remarks:
I 10 A--•~,..._., __ ,-..& C--1-.---
No /
SOIL Sampling Point· fij)
' I
Profile Description: (Describe to the depth needed to document .the Indicator or confirm the absence of Indicators.)
Depth Matrix Redox Features
'ln£h§s} Color !mQl&tl __ %_ Color {moist} _J____TuQL Loe' TeJ!ll!!:12 Remarks
cJ-5 ,v yr;_ ., I 100 St '/It_ t. f "? ' J ...
~ ---------
-r-/t. r.) '{fl 1IL1o I r/ y' J?' :·; / t, ______:S_ ....!..i..l:.!. /.,I c:jfJ.~c.}~ ~
---------
---------
---------
---------
------------
------------
1Tvoe: C=Concentration, D=Oeoletion, RM=Reduced Matrix. 2Locatlon: PL=Pore UnlnQ. RC=Root Channel M=Matrlx.
Hydrlc Soll Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydrlc Solla':
_ Hlstosol (A 1) _ Sandy Redox (S5) _ 1 cm Muck (A9) (LRR C)
_ Histic Epipedoo (A2) _ Stripped Matrix (S6) _ 2 cm Muck (A10) {LRR B)
_ Black Histic {A3) _ Loamy Mucky Mineral {F1) _ Reduced Vertie {F18)
_ Hydrogen Sulfide (A4) _ Lo;imy Gleyed Matrix (F2) _ Red Parent Material {TF2)
_ Stratified Layers {AS) (LRR C) K Depleted Matrix {F3) _ Other (Explain In Remarks)
_ 1 cm Muck (A9) (LRR D) _ Redox Dark Surface {F6)
_ Depleted Below Dark Surface (A11) _ Depleted Dark Surface {F7)
_ Thick Dark Surface (A12) _ Re<iox Dl'!pressions (F8)
_ Sandy Mucky Mineral (S1) _ Vernal Pools {F9) 'Indicators of hydrophytlc vegetation and
_ Sandy Gleyed Matrix (S4) wetland hydrology must be present.
Restrictive Layer (If present):
Type: / Depth (Inches): Hydrlc Soil Present? Yes No ----
Remarks:
.,
HYDROLOGY
Wetland Hydrology Indicators: S~!21JS!il~ 1nsiild!IQ!J (2 Q! !llQ!e reg11iredl
erimli!rt: I0~i!.li!l2Gi (lm QI!~ in~•~lQr I§ ~!,!ffiS,l!i!!Jll _ Water Marks (B1) (Riverine)
_ Surface Water {A 1) _ Salt Crust(B11) _ Sediment Deposits (82) (Riverine)
_ High Water Table (A2) _ Biotic Crust (B12) ✓ Drift Deposits (B3) (Riverine)
_ Saturation (A3) _ Aquatic Invertebrates (813) ~Drainage Patterns (B10)
_ Water Marks (81) (Nonrlverlne) _ Hydrogen Sulfide Odor (C1) _ Dry-Season Water Table (C2)
_ Sediment Deposits (82) (Nonrlverlne) _ Oxidized Rhizospheres along Living Roots (C3) _ Thin Muck Surface (C7)
_ Drift Deposits (B3) (Nonrlverlne) /Presence of Reduced Iron (C4) _ Crayfish Burrows (C8)
_ Surface Soil Cracks (86) _ Recent Iron Reduction in Plowed Soils (C6) _ Saturation Visible ?1'1 Aerial Imagery (C9)
_ Inundation Visible on Aerial Imagery (87) _ Other (Explain in Remarks) _ Shallow Aquitard (D3)
/Water-Stained Leaves (89) _ FAG-Neutral Test (05)
Field Observations:
Surface Water Present? Yes __ No / Depth (inches):
Water Table Present? Yes __ No~ Depth (inches):
Saturation Present? Yes __ No L__ Depth (inches): Wetland Hydrology Present? Yes ./ No ----(Includes caolllarv frinoe \
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), If available:
Remarks: c~~J") Alo ~~o~ tk,> poi 1t..\-#\,.,~ k'7 J.1-,:1 iv''> ,.,
w~P-r .. J: ,vl.,J~s ~().J { s-c,.., \ t,... ··' , .. ,() . , I
US Army Corps of Engineers Arid West-Version 11-1-2006
WETLAND DETERMINATION DATA FORM -Arid West Region
ProjecUSite: "E\ ~"'° G> ~"" i ,~....,v'•~1" City/County: lJJ)c,,6',.). 1~:D:-9§<> Sampling Date: J?,,/,o.._/4 '-{
Applicant/owner: (', ):; ,f C~hW State: CA Sampling Point: _G...._...,.)'----
lnvestlgator(s): <:;;(3. t-..),Al\ Section, Township, Range: t,..,\_Hf,.1. «I lole-'t"-\.~,'! )2. S I f2e._y-'-lw
Landform (hillslope, terrace, etc.): C<tJ-l.L ~ Local relief (concave, convex, none): bQ">i!f ~ Slope(%): '-l5 -----''---
Subregion (LRR): --------------,--Lat: ]3 • I jfi'¾ 25 Long: I \ "l • 'I.-~"~~ () Datum:
Soil Map Unit Name: ((,..,.,,..,,l(. -( c 1rl-,, G.&(?~ /SaY{<.\.\ .C,-.v. So¥\...{ NWI classlfication: -----
Are climatic I hydrologlc conditions on the site typical for this time of year? Yes ✓ No ___ (If no, explain In Remarks.) ✓
Ive Vegetation __ , Soll __ , or Hydrology __ significantly disturbed? Ate "Normal Circumstances" present? Yes_._ No_
Are Vegetation__. Soil __ , or Hydrology __ naturally problematic? (If needed, explain any answers In Remarks.)
SUMMARY OF FINDINGS -Attach site map showing sampling point locations, transects, Important features, etc.
Hydrophytic Vegetation Present? Yes / No ------la the Sampled Area L Hydrle Soil Present? Yes ---Na+ within a Watland? Yes No Wetland Hydrology Present? Yes ---No ___
Remarks:
VEGETATION
Absolute Dominant Indicator Dom.lnance Test worksheet:
T~iz ~!!l!Mt!l (Use scientific names.) °& Q2titr ~oecie1? §.1Al111 Number of Dominant Species
1. AY·,op wt HovV qo va (Acw' That Are OBL, FACW, or FAC: 5 {A) I
2. Total Number of Dominant > 3. Species Across All Strata: {B)
4. Percent of Dominant Species ~@ Total Cover: (NB)
liiiiH2!1~/Sh~!ll!l!m
That Are OBL, FACW, or FAC: 7 I 00
,p vu FAcw' Prevalence Index wortc•heet: 1. ..( V'-I !o ,,. , ... ~. I(._ ' 2. ~ui>.A @\L. 5 £tlCvl Total ~ QQY!l[ Qf; M!.!1012111'. ~lG
3. OBLspecies x1=
4. FACW species x2=
5. FACspecles x3=
Total Cover: FACU species X4=
t:f!!m ~!rllYQ;i
cdv}
UPLspecles x5=
1. rJ.fJ.-,~ yv... fftu Column Totals: (A) (B)
2.
3. Prevalence Index = BIA =
4. Hydrophytlc Vegetation Indicators:
5. ~Dominance Test Is >50%
6. -Prevalence Index Is SJ.01
7. _ Morphological Adaptations 1 (Provide suJJPC)ftlng
8. data in Remarks or on a separate sheet)
Total Cover: ,~ _ Problematic Hydrophytlc Vegetation1 (Explain)
WQS!Qll'. Vl!Ji! ~l!lllY!!!
1. 1Indicators of hydlic soil and wetland hydrology must
2. be present
Total Cover: Hydrophytlc
t?5 Vegetation
Yes.L_ % Bare Ground In Herb Stratum % Cover of Biotic Crust Present? No -Remarks:
-
SOIL Sampling Point: {J;2_
Profile Description: (Describe to the depth needed to document the Indicator or conflnn the absence of Indicators.)
Depth M111!:lx B1!12.11 EYII.IC!I!
(ID!i!JHl 1::'~ _L_ Color (m2i11ll _!L__Im.:.... ~S!!,2 ~ Remari<s
()-/ (. /i)I) ------
---------
---------
---------
---------
---------
---------
---------1TvnA; C=Concentrallon D=Deoletlon, RM=Reduced Matrix. 2Locatlon: PL=Pore Unlnci_ RC=Root Channel M=Matl1x.
Hydrlc Soll Indicators: -(Applicable to all LRRa, unless otherwise noted.) Indicators for Problematic Hydrlc Solla':
_ Hlstosol (A 1) _ Sandy Redox (S5) _ 1 cm Muck (A9) (LRR C)
_ Histlc Eplpedon (A2) _ Stripped Matrix ($6) _ 2 cm Muck (A10) (LRR B)
_ Black Histlc (A3} _ Loamy Mucky Mineral (F1) _ Reduced Vertie (F18)
_ Hydrogen Sulfide (A4) _. Loamy Gleyed Matrix (F2} _ Red Parent Material (TF2)
_ Stratified Layers (A5) (LRR C) ...:.... Depleted Matrix (F3) _ Other (Explain in Remarks)
_ 1 cm Muck (A9) (LRR D) _ Redox Dark Surface (F6)
_ Depleted Below Dark Surface (A 11} _ Depleted Dark Surface (F7}
_ Thick Dark Surface (A12) _ Redox Depressions (F8}
_ Sandy Mucky Mineral (S1} _ Vernal Pools (F9) 'Indicators of hydrophytic vegetation and
Sandy Gleyed Matrix (S4) wetland hydrology must be present.
Restrictive Layer (If present):
Type:
Depth (Inches): Hydrlc Soll Present? Yes ' No ✓
Remarks:
HYDROLOGY
Wetland Hydrology Indicators: SgQQndaN I !!dlwll12!1 (2 Qt !!!2!:!2 rlQ!,!lrl!l l
Prlflls!IY IC!!lti!IW !IDlo'. QDI i~gtor il! !i!.!f!i£l1nt} _ Water Marks (B1) {Riverine)
_ Surface Water (A1} _ Salt Crust (B11} _ Sediment Deposits {B2) (Riverine)
_ High Water Table (A2) _ Biotic Crust (B12} _ Drift Deposits (B3) (Riverine}
_ Saturation (A3) _ Aquatic Invertebrates (813) _ Drainage Patterns (B10)
_ Water Marks (B1) (Nonrlverlne) _ Hydrogen Sulfide Odor (C1) _ Ory-Season Water Table (C2)
_ Sediment Deposits (B2) (Nonrlver1ne) _ Oxidized Rhizospheres along Living Roots (C3} _ Thin Muck Surface (C7)
_ Drift Deposits (B3) (Nonrlvertne} _ Presence of Reduced Iron (C4) _ Crayfish Burrows (CB}
_ Surface Soll Cracks (86) _ Recent Iron Reduction In Plowed Solis (C6) _ Saturation Visible on Aertal Imagery (CS)
_ Inundation Vlstble on Aerial Imagery (B7) _ Other (Explain In Remarks) _ Shallow Aq"ultard (D3)
_ Water-Stained Leaves (89) _ FAC-Neutral Test (05)
Field Ob■ervatlona:
Yes __ No / Depth (inches}: Surface Water Present?
Water Table Present? Yes __ No :;,,-Depth (inches): / Saturation Present? Yes __ No __ Depth {inches): Wetland Hydrology Present? Yes -No
(includes caDlllarv frinae) -
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Inspections), If evallable:
Remarks:
JUIIISDICTION.\L OntN(ATION REPOaT
RtYISEO MARCH 2020
El CAMINO Rt:.-.L AT CANNON ROAD INTERSf:CTION h,4PROVEM£NTS P1110JECT
CAltlS&AO, CALIFORNIA
APPENDIX B
IC
ARID WEST EPHEMERAL AND INTERMITTENT STREAMS OHWM DATASHEET
P:\HCR1905-ECR at Cannon Rd lmprovements\JD\JD_Repon__Flnal_revMarch2020.docx •3/30/2020•
Wentworth Size Classes
lndles (,n) MIn1meien:: (mm) \Nent.wJth 'i,\ZO ci3ta.
--BculdeJ
ii 10.08 ---256 ----.
Coob•
2.55 ---.. -. ----.
0 157 Pebt:lle ili - --• -. --- -
-
Granule
0079 200
Very coarse sand
0031l ---1 00 -. ----.
Goarse sand
0.020 -- -
050 -----. ~-Medium ,-and ii 112 0.0006 0 25 I Fineiand ,,. 000, ---0 125 ------
Very f:ne sand
1/8-00025 00025
Coarse siH
1/16 0.0012 -00'1 -.
'" ' ,m 000001 - --00156 ~ -----. ~ Fine sd1
1164 0 00031 ---00078------.
Very fine sit !
11126 -0 OCX)15 00039 II Clay
1111111111p11111111111111111111111111111111111111p1111111q1111111111111111111111111
Orn, I 2 \ 4 :i-6 7 ~
11111111111111 I I 1111111111111 'I' I' I' I' I' I' I' I' I' I' I' I' I
0 m 2 J
REPORT DOCUMENTATION PAGE Fonn Approved
0MB No. 0704-0188
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22202-002. ~• ll"oullt"" ,._,, NI ""~""'I-p,.,...,,,flf ,~. nopenon 111 .. be-jlcttoq panall)t for laill,,gto~ly 1llilla-nf °"'"""""lfQ<XlOC no1<1oia,y a
c~ ..ac, ()1,,11 co,,1'<11 ""fft>ar Pl.EASE 00 NOT RETURH 'l'O\Jlil FORM TO 1'HE ll90IIE ADDRESS.
1. REPORT DATE (DD-MM YYYY)
1
2. REPORT TYPE 3. DATES COVERED (From. To)
July 2010 Tecltnil;W Nole
4. TITLE AND SUBTITLE Sa. CONTRACT NUMBER
Updated Datasheet for the Identification of the Ordinary High Water Mark (OHWM) in the 5b. GRANT NUMBER Arid West Region of the Western United States
SC. PROGRAMELEl'IENT NUEER
8. AUTHOR(S) 5d. PROJECT NUMBER
Katherine E. Curtis and Robert W. Lichvar Se. TASK NUMBER
5f. WORK UNIT NUMBER
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) a. PERFORMING ORGANIZATION REPORT
NUMBER
U.S. Anny Engineer Research and Development Center
Cold Regions Research and Engineering Laboratory ERDC/CRREL lN~I0-1
72 Lyne Road
Hanover, NH 03755-1290
9. SP0NSORING I MONITORING AGENCY NAME{S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)
Headquarters
U.S. Army Corps of Engineers
Washington, OC 20314-1000 11. SPONSOR/MONITOR'S REPORT
NUMBER(S)
12. DISTRIBUTION J AVAlLABILITY STATEMENT
Approved for public release; distribution is unlimited.
13. SUPPLEIENTARY NOTES
14. ABSTRACT
The Ordinary High Water Marl< (OHWM) is a method used to identify the lateral limits of non-wetland waters. Lichvar and McColley
(2008) developed an OHWM delineation manual for ephemeral and intermittent streams in the Arid West. Their approach identified key
hydrologic, geomorphic, and vegetation indicators useful in OHWM delineation. This technical note provides an updated datasheet to the
manual. The datasheet has been sin-.,lified but still includes the overall field signatures and preliminary methods used to determine the
OHWM. The datasheet now focuses on identifying the characteristics of each individual hydrogeomorphic tloodplain unit and uses the
differences between the floodplain units to identify the OHWM.
15. SUBJECT TERMS
Arid West, Floodplains, Ephemeral streams, Intermittent streams, Ordinary High Water Mark
16. SECURITY CLASSIFICATION OF: 17. LIMITATION 18. NUMBER
OF ABSTRACT OF PAGES
a.REPORT b.ABSTRACT c. THIS PAGE
u u u u 20
Ula. NAME OF RESPONSIBLE
PERSON
1th. TELEPHONE NUr'8ER (mdudll an,e
~ .. ,
Standard Form 298 (Rev. 8-98)
l'NecrlbedbyNtSlad.ZD111
Ju,rsolCTIONAL DELINEATION Rt,o,r
R,v,,,o MA,CH 2020
E. CAMINO REAL" CANNON Ro•o IN-<RSECT,ON IMPROV,, ... NTS PAO/Hf
CMlSOAO, CACIFORNIA
APPENDIX C
FUNCTIONS AND VALUE ANALYSIS
P:\liCR1905. ECR ot cannon Rd lmprovements\JD\JD_Report_Flnol_revMorch2020.docx •3/30/2020•
I
Ju,,,o,cr,o"" DELl"EATOO" R"ORT
R,visrn M•acH 2020
EL CAMl"O REAL AT CANNON ROAD INTERSECTION IMPAOV<M,NH PROJECT
CARLS,AD, CALlfORNIA I C:
ANALYSIS OF FUNCTIONS AND VALUES OF POTENTIAL WATERS OF THE
UNITED STATES
The following is an assessment of the functions and values attributable to the identified potential
jurisdictional waters in the study area. All waters have some degree of functionality, and no single
drainage can perform all of the functions considered below. The following functions are analyzed at
low, moderate, or high value levels. The individual drainages are analyzed in Table C-1 (following)
based on the criteria outlined below.
HYDROLOGIC REGIME
This function is the ability of a wetland or stream to absorb and store water belowground. The
degree of this saturation is dependent on the soil composition and is affected by prior flooding
events. For example, clay soils possess more pore space than sandy soils. However, the smaller pore
size slows the rate at which water is absorbed and released and, therefore, clay soil has a lower
capacity to store water than sandy soils. The storage of water belowground allows for the
fluctuation between anaerobic and aerobic conditions that benefit environmental conditions
necessary for microbial cycling.
FLOOD STORAGE AND FLOOD FLOW MODIFICATION
This function is determined based on the ability of a wetland or stream at which the peak flow in a
watershed can be attenuated during major storm events and during peak domestic flows to take in
surface water that may otherwise cause flooding. This is dependent on the size of the wetland or
stream, the amount of water it can hold, and the location in the watershed. For instance, larger
wetlands or streams that have a greater capacity to receive waters have a greater ability to reduce
flooding. In addition, areas high in the watershed may have more ability to reduce flooding in
downstream areas, but areas lower in the watershed may have greater benefits to a specific area.
Vegetation, shape, and the configuration of the wetland or stream may also affect flood storage by
dissipating the energy offlows during flood events.
SEDIMENT RETENTION
Removal of sediment is the process that keeps sediments from migrating downstream. This is
accomplished through the natural process of sediment retention and entrapment. This function is
dependent on the sediment load being delivered by runoff into the watershed. Similar to above, the
vegetation, shape, and configuration of a wetland will also affect sediment retention if water is
detained for long durations, as would be the case with dense vegetation, a bowl-shaped watershed,
or slow-moving water. This function would be demonstrated (i.e., high) if the turbidity of the
incoming water is greater than that of the outgoing water.
NUTRIENT RETENTION AND TRANSFORMATION
Nutrient cycling consists of two variables: uptake of nutrients by plants and detritus turnover, in
which nutrients are released for uptake by plants downstream. Wetland systems in general are
P:\HCR1905 • ECR ot C.n""n Rd lmpro'"'monts\JD\JD _ Report_F1r,al_revMacch2020.doc, •3/30/2020• C-1
JURISDICTIO"Al DHINEATION Reeo•r
Re,,srn MARCH 2020
EL CAMl•o REAL AT CANNO" ROAD INTERSECTION IMe,OV,M,STS P,oJeCT
(ARlSOAD, CALIFORNtA I C:
much more productive with regard to nutrients than upland habitats. The regular availability of
water associated with the wetland or stream may cause the growth of plants (nutrient uptake) and
associated detritivores and generate nutrients that may be utilized by a variety of aquatic and
terrestrial wildlife downstream.
TOXICANT TRAPPING
The major processes by which wetlands remove nutrients and toxicants are as follows: (1) by
trapping sediments rich in nutrients and toxicants, (2) by absorption into soils high in clay content or
organic matter, and {3) through nitrification and denitrification in alternating oxic and anoxic
conditions. Removal of nutrients and toxicants is closely tied to the processes that provide for
sediment removal.
SOCIAL SIGNIFICANCE
This is a measure of the probability that a wetland or stream will be utilized by the public for its
natural features, economic value, official status, and/or location. This includes public use for
recreational uses, such as boating, fishing, birding, walking, and other passive recreational activities.
In addition, a wetland or stream that is utilized as an outdoor classroom, is a location for scientific
study, or is near a nature center would have a higher social significance standing.
WILDLIFE HABITAT
General habitat suitability is the ability of a wetland to provide habitat for a wide range of wildlife.
Vegetation is a large component of wildlife habitat. As plant community diversity increases along
with connectivity with other habitats, so does potential wildlife diversity. In addition, a variety of
open water, intermittent ponding, and perennial ponding is also an important habitat element for
wildlife.
AQUATIC HABITAT
The ability of a wetland or stream to support aquatic species requires that there be ample food
supply, pool and riffle complexes, and sufficient soil substrate. Food supply is typically in the form of
aquatic invertebrates and detrital matter from nearby vegetation. Poot and riffle complexes provide
a variety of habitats for species diversity as well as habitat for breeding and rearing activities.
Species diversity is directly related to the complexity of the habitat structure.
Table C-1: Functions and Values of Features within the Study Area
Flood Storage Nutrient
Hydrologic & Flood Flow Sediment Retention & Toxlcant Social Wildlife Aquatic
Feature Regime Modification Retention Transformation Trapping Significance Habitat Habitat
Agua
Hedionda Moderate High Moderate Moderate Moderate High High Moderate
Creek
P:\HCR1905 -ECR at Cannon Rd lmprovomonto\JD\JD _Report_final_revMarchW20.doc«3/30/2020• C-2
BIOLOGICAL RHO"Rns HCHNICAL Re,o•T
R,visrn JUNE 2020
EL CAMl•D REAl Al CANNON ROAD INTERSECTION IMPROVE,<ENTS PROJ,CT
(1T' OF (ARLS,AO, (AllFO,NIA
APPENDIX E
LSA
FALL/WINTER SEASON NIGHTTIME BAT SURVEY AT THE EL CAMINO REAL
BRIDGE OVER AGUA HEDIONDA CREEK
P·\HCR1905 -ECR at Cannon Rd lmprovements\BTR\ECR Bridge BTR_Rev_June2020_Clean,doc> (5/17/2020)
L SA l.SA ASSOCOIAl fS, INC
20 EXECUTIVE PARK su1n: 2UO
IRVINE, CALIFORNIA "2Gl<
949 551 00GG JU.
Y<9 551.8076 eAX
BLRKELEY
CARLSUAIJ
HHI CO[TCNS
FRESNO
PALM SHINGS
Pl R!CllMO'<D
RIVERSIDE
ROCKLIN
SAN l U!S OH.SPO
MEMORANDUM
MIT,
rn.
January 25, 2016
Jaime Morales, LSA Associates, Inc.
Jill Carpenter, LSA Senior Biologist/Bat Specialist
Fall/Winter Season Nighttime Bat Survey at the El Camino Real Bridge over Agua
Hedionda Creek (LSA Project No. HCR1402), City of Carlsbad, San Diego County,
California
This memorandum documents the results of a nighttime bat survey conducted on November 11, 2015,
at the El Camino Real bridge crossing of Agua Hedionda Creek in San Diego County (Figure l; all
figures attached) for the El Camino Real at Cannon Road Intersection Improvements project (project).
Specifically, the study area for the project is located within the City of Carlsbad, and encompasses the
northeastern and southeastern comers of the intersection of El Camino Real and Cannon Road. Due to
the reported historic observations of large numbers of bats roosting within the El Camino Real Bridge
over Agua Hedionda Creek, a preliminary daytime bat habitat suitability assessment for the El
Camino Real at Cannon Road Intersection project was deemed unnecessary. Instead, two nighttime
bat surveys were recommended during two separate seasons, with those surveys to be perfonned as
soon as possible in advance of project construction. Separate seasonal surveys are needed because
species composition and the numbers of bats often change seasonally at a given roost site, and
because potential impacts to bats from construction activities associated with the El Camino Real at
Cannon Road Intersection Project cannot be adequately assessed, nor can appropriate species-specific
minimization measures be detennined, without adequate knowledge of the size(s) and species
composition, including any seasonal variation if present, of any bat colonies roosting within the
bridge. These seasonal surveys will also serve as preconstruction surveys for the project.
This nighttime survey comprises the first of the two recommended seasonal surveys, and was
perfonned during the fall/winter season to ascertain the size and species composition of any bats
potentially utilizing the bridge as an overwintering roost site, as well as how the bats are distributed
throughout the bridge during the fall/winter. This infonnation is useful in determining how many bats
will be displaced and, therefore, subject to temporary impacts from humane evictions or exclusions,
which are typically perfonned during the fall season, should those actions be warranted to prevent
direct mortality. An additional survey will be perfonned at the El Camino Real bridge between June 1
and August 15, which coincides with the peak period of the bat maternity season (April ]-August
31 ), in order to adequately assess the potential for project-related impacts to nursery colonies of bats,
including flightless young.
In addition to discussing the results of the fall/winter season nighttime bat survey, this memorandum
includes preliminary recommendations to minimize potential impacts to bats from activities
associated with the proposed widening of the El Camino Real Bridge as part of the El Camino Real at
Cannon Road Intersection Improvements project. More precise recommendations will be prepared
following the completion of the summer maternity season survey.
l /29/16 "P:\HCR 1402\Biology\Bat Surve} \BatNightSurve} _ ElCammoReal docx»
!SA ,\SSOCl,\l"IS 1,-,,;
BACKGROUND
Bat populations are generally declining throughout Southern California and globally due to various
factors including loss of roosting and foraging habitats, exposure to pesticides and pathogens, and
direct extermination (Johnston et al. 2004; Miner and Stokes 2005). Because bats have low
reproductive turnover (most species have only one young per year, and only a few species have twins
or multiple births) and high juvenile mortality, it can take many years for a colony or population of
bats to recover from any impacts that result in morta1ity or even in a decrease in reproductive ability.
As natural roost sites become scarcer due to urban development and changes in land use, the use of
humanmade structures such as bridges and buildings as roost sites by some bat species has increased
as bats seek alternative roosting options (Erickson et al. 2003). The importance and ecological value
of anthropogenic structures as roosts has consequently increased to the point that many of these
'·artificial" roost sites are becoming essential to the survival of local bat populations (Johnston et al.
2004; Smith and Stevenson 2013). However, these anthropogenic roosting sites are also highly
vulnerable because bats are often driven out or killed once they are discovered occupying
humanmade structures. Even bats attempting to roost in landscape plantings can be subject to impacts
from tree removal or trimming activities such as the trimming of palm fronds. Therefore, as urban and
suburban development occurs across the landscape, many of these areas may act as habitat "sinks"1
where bats may at first appear to be relatively common and may even be attracted to humanmade
structures, but then decrease in abundance over time as development of that area continues (Miner
and Stokes 2005; Remington 2000). The protection of bat roosting and foraging habitat, particularly
those identified as being maternity or nursery sites, is, therefore, considered during the environmental
review process to prevent potentially significant negative effects to or further loss ofremaining
populations.
Day roosts protect bats from predators and the elements during the day while resting and/or rearing
their young. Examples of day-roosting sites include, but are not limited to, anthropogenic structures,
trees, cliff or rock crevices, caves, and mines. In humanmade structures such as bridges and culverts.
day roosts are typically in expansion joints, hinges, or other crevices. Some types of day roosts where
bats are particularly vulnerable to disturbance include maternity colonies, where female bats
congregate in the spring and summer months to give birth and raise young, and hibemacu\a, where
bats enter a period of hibernation during the winter months. A night roost, on the other hand, refers to
a structure or structural feature (natural or humanmade) in which bats roost during the evening
between foraging bouts; in addition to crevices, examples of night-roosting habitat include cavities,
comers, culvert walls, and recessed open spaces that are sheltered from the wind. Night roosts are
typically situated in or near a foraging area and play an important role in the energetics and social
interaction of bats. When a night roost is eliminated, the energetics for bats to successfully utilize the
surrounding foraging area may be negatively affected. Day roosts may also double as night roosts,
particularly if they are situated in or near a foraging area Since bats have separate roosting and
foraging habitat requirements, it is expected that some bats may utilize one area for foraging and
another for roosting. While more extensive and direct impacts to bats occur through roost removal,
destruction, or disturbance, indirect impacts such as decline of prey base due to loss or modification
of foraging habitat can also be substantial. Therefore, when assessing an area with regard to proposed
alterations to habitat, a landscape-level approach is required to adequately determine potential
impacts to bats.
A habitat sink refers to an area where the productivity of a given species is insufficient to offset mortality.
1/291 16 «P·"JiCR ! 402\Biology\.Elac Survey'illatNightSurvey _ EICaminoReal docx» 2
L>A ASSO<;]Al U. IN<:
METHODS
On the evening of November 11, 2015, LSA Associates, Inc. (LSA) Senior Biologist and bat
specialist Jill Carpenter performed a nighttime bat survey at the El Camino Real Bridge over Agua
Hedionda Creek in order to evaluate use of the structure by bats as a day and/or night roost during the
fall/winter season. Ms. Carpenter was assisted by LSA biologist Lonnie Rodriguez, who has past
experience assisting with nighttime emergence and acoustic bat surveys.
Prior to the emergence period and exit count portion of the survey, the crevices between the concrete
box beams were examined for the presence of day-roosting bats with a high-intensity spotlight, and
the approximate numbers, distribution, and species of bats observed were marked on a hand-drawn
map. The exit count portion of the survey was subsequently initiated one-half hour before sunset and
continued until one hour after sunset. An observer was positioned on each side of the bridge at a
vantage point that would optimize visibility of any bats that may exit or enter the bridge in order to
obtain an estimate of the number of day-roosting bats present, and to correlate the acoustic data
recorded with visual observations. Numbers ofbats exiting or entering the bridge were recorded using
tally counters. Observers remained in position counting bats until one hour after sW1set. Following
completion of the emergence period, the biologists performed a second spotlight examination of the
crevices between the concrete box beams to detennine how many, if any, bats remained in the roost
crevices. for the remaining hour of the survey period, the biologists assessed the level ofnight-
roosting activity beneath the bridge by observing and documenting any bat activity in the vicinity of
the structure using night vision equipment.
Three Pettersson D240X and one Wildlife Acoustics EchoMeter 3+ ultrasound detectors were used in
time expansion mode to collect acoustic data during the entirety of each nighttime survey, and digital
media players or secure digital (SD) memory cards were used to record the call files. These data,
consisting of full-spectrum sonograms of echolocation calls, were subsequently analyzed using
SonoBat 2.9 acoustic analysis software. Species identifications were made by comparing call
recordings with a library of"voucher" calls from known hand-released bats. Some limitations are
inherent in acoustic monitoring and in the analysis of acoustic data and include (but are not limited to)
human bias and past experience in data interpretation, as well as the fact that some species are not
equally detectable or may not be recorded at all. For example, some bats (e.g., Mexican free-tailed
bats [Tadarida brasiliensis]) emit loud low-frequency echolocation calls that can be recorded from
great distances and will be overrepresented in the data, while "whispering" bats (e.g., Townsend's
big-eared bats [Cmynorhinus townsendii]) emit faint calls that may not be recorded at all. In addition,
not all call sequences are identifiable. Different bat species may use similar types of echolocation
calls, or the same species may use different types of echolocation calls based on the perceptual task
and the immediate environment or habitat. In addition, not all bats recorded will be those exiting or
entering the bridge in question. Some are foraging bats en route to or from other structures. It is
important, therefore, to have observers on site in order to correlate calls with visual observations.
RESULTS AND DISCUSSION
The study area comprises a section of Agua Hedionda Creek, which contained flowing as well as
ponded water at the time of this survey. The area surrounding the El Camino Real bridge over Agua
Hedionda Creek is characterized by open water as well as ornamental vegetation associated with
adjacent urban development on the northern side of the bridge, and native habitats such as riparian
scrub, freshwater marsh, open freshwater, and coastal sage scrub on the southern side of the bridge
1129/16 «P. \JfCR 1402\.Biology\Bat Survey1Ba1NightSurvey _ EICanunoReal.docx» 3
I SA ASSO<,IATfS 1,;r;
(Figure 2). All of these areas likely provide a variety of insect fauna for foraging, increasing the
desirability of the bridge structure for use as a day and night roost.
The El Camino Real Bridge is a concrete box beam bridge. In this type ofbridge design, the spaces
between the concrete beams fonn crevices in the underside of the bridge deck and offer shelter from
inclement weather and potential predators; as a result, the entire length of the El Camino Real bridge
over Agua Hedionda Creek contains structural elements that are suitable for and commonly used by
day-and night-roosting bats (Figures 2 and 3). Bats and bat sign (e.g., guano or urine staining)
confinning use of the bridge by roosting bats were observed throughout the bridge (Figure 3).
At least 440 day-roosting bats were counted during the pre-emergence spotlight inspection of the
roost crevices at the El Camino Real bridge. These bats were primarily observed roosting in the
crevices along the northern side of the bridge, with the largest numbers of bats roosting in the
northern crevices of the middle section of the bridge. The majority of the bats day roosting in the
bridge were visually identified as Mexican free-tailed bats. The remaining individuals, comprising
less than a dozen of the bats roosting throughout the bridge, were identified visually and acoustically
as Yuma myotis bats (Myotis yumanensis).1 A graphic rendering of the bridge layout showing the
approximate numbers, distribution, and species of bats observed during the pre-emergence spotlight
inspection is provided on Figure 4. It should be noted that accurate spotlight counts of roosting bats
are often difficult to obtain when large numbers of bats are roosting in a given crevice because
crevice-roosting bats tend to cluster or "stack" on top of each other; therefore, in some cases, a
number is included on the graphic with a"+" sign indicating that this is a minimum number of bats
present at that location, and that the presence of additional bats above those directly observed cannot
be ruled out.
During the emergence period, approximately 140 bats were observed exiting from the bridge, with the
majority of the bats exiting the bridge on the north side. Many of the bats foraged beneath the bridge
for several minutes before exiting the bridge area. At the conclusion of the emergence period,
approximately 357 bats were counted as remaining in the roost crevices. Based upon the exit count
numbers and the results of this post-emergence crevice inspection, the El Camino Real bridge
supports an overwintering population of approximately 450-500 day-roosting bats2.
While some populations of Mexican free-tailed bats in Southern California have been observed using
bridges as roost sites year-round (person observation), fall and winter roost sites can also be important
stopping points for species engaging in localized seasonal movements or migrating longer distances
toward hibernation and/or wintering sites (Erickson et al. 2003; personal observation). Mexican free-
tailed bats in particular are known to migrate away from colder areas of California and over-winter in
areas with nonfreezing temperatures such as coastal areas, and although the details of these
movements are not well understood, these migratory individuals (along with local resident
populations of this species) appear to be active within their winter range. Although it is not known
Some of the Myotis species can be difficult to identify to the species level without close examination in the
hand; however, based on diagnostic observations of foraging behavior and diagnostic characteristics
present in the acoustic data, this species was conclusively identified.
Although approximately 440 bats were counted during the pre-emergence spotlight inspection, this is
considered a "minimum" number based upon the aforementioned "stacking" behavior; therefore, this
estimate is obtained from adding the numbers of bats counted exiting the bridge to the numbers of bats
counted remaining within the bridge at the conclusion of the emergence period.
1 -'29i 16 «P·\HCR l 402\B,ology1Bat S...-vey\BatN ightSurvey _ EIC'aminoReal docx» 4
whether the individuals present in the El Camino Real bridge during this survey are present year-
round, the El Camino Real bridge is likely an important overwintering site for the observed
population of Mexican free-tailed bats and Yuma myotis. However, the bats are dispersed in
relatively low concentrations throughout the El Camino Real bridge, and it appears that a sufficient
amount of suitable habitat is present throughout the structure to house the overwintering population if
bats are temporarily excluded from some of the roost crevices to prevent direct impacts from project
construction.
CONCLUSIONS AND RECOMMENDATIONS
Bats and other nongame mammals are protected by California Fish and Game Code§ 4150, which
states that all nongame mammals or parts thereof may not be taken or possessed except as provided
otherwise in the code or in accordance with regulations adopted by the commission. Activities
resulting in mortality of non game mammals ( e.g., destruction of an occupied non-breeding bat roost,
resulting in the death of bats) or disturbance that results in the loss of a maternity colony of bats
(including the death of young) may be considered "take" by the California Department of Fish and
Wildlife (CDFW). ln addition, reported anecdotal observations of bats roosting at the El Camino Real
bridge over Agua Hedionda Creek indicate that this bridge is used as a maternity roost by a large
number of bats; as such, it is considered a native wildlife nursery site, and potential impacts should be
minimized to the greatest extent practicable to avoid significant impacts to the viability of the local
population. The species composition and numbers of bats utilizing the El Camino Real bridge as a
maternity roost will be determined during the maternity season bat survey, which will be performed
between June 1 and August 15.
Two bat species, Mexican free-tailed bat and Yuma myotis, were observed and/or acoustically
detected within the study area during the fall/winter season nighttime survey at El Camino Real
bridge over Agua Hedionda Creek. An estimated 450---500 bats, predominantly Mexican free-tailed
bats with approximately a dozen Yuma myotis, use the El Camino Real bridge as an overwintering
roost site. These bats were primarily observed day roosting in the crevices along the northern side of
the bridge, with the largest numbers of bats roosting in the northern crevices of the middle section of
the structure. The overwintering bat population is dispersed in relatively low concentrations
throughout the El Camino Real bridge, and it appears that a sufficient amount of suitable habitat is
present throughout the structure to house the overwintering population if bats are temporarily
excluded from some of those areas. Therefore, if a humane eviction/exclusion at a portion or portions
of the bridge is determined to be necessary to prevent direct impacts, provision of alternate roosting
habitat will not be needed if this exclusion is limited to September I-March 31, which is outside of
the bat maternity season. However, since the numbers and distributions of bats present within the
bridge during the maternity season are not known at this time, if bats will be prevented from roosting
in portions of the bridge between April I and August 31, alternate roosting habitat may need to be
installed to prevent potential impacts from this loss of roosting habitat during the maternity season.
The determination with regard to whether or not alternate bat-roosting habitat will be needed to offset
temporary impacts during the maternity season will be made once information on the size, species
composition, and distribution of bat colonies using the El Camino Real bridge as a maternity.roost are
obtained from the summer maternity season survey.
I i29/16 «P IHCR 14021Biology1Bat SurveylBatN ightSurvey _ElCammoRealdoc,rn 5
To minimize potential impacts to roosting bats from project-related construction activities, LSA
recommends the following preliminary measures, which may be revised following the completion of
the maternity season survey:
• Depending on the type(s) and location(s) of potential impacts during project-related construction
activities, a humane eviction/exclusion may be warranted to prevent mortality of bats. If needed,
humane evictions/exclusions should be performed by a qualified bat biologist in the fall
(September or October) preceding construction to exclude bats from directly affected work areas
and avoid potential direct impacts. However, exclusions are not always appropriate, and the
decision of whether or not to implement a humane eviction/exclusion of bats should be made in
consultation with a qualified bat biologist. It is particularly important to avoid direct impacts to
bats during the maternity season (April I-August 31), when nonvolant (flightless) young are
present.
• Contingent upon the results of the maternity season survey, installation of alternate roosting
habitat may be required by CDFW in conjunction with the humane eviction/exclusion to prevent
impacts to maternity-roosting bats; however, alternate roosting habitat is not necessary for
exclusion periods limited to September ]-March 31.
• If permanent impacts such as removal or obstruction of bat-roosting habitat will occur from
project construction, installation ofalternate roosting habitat may be required by CDFW to avoid
permanent impacts to the maternity colony.
• To minimize potential impacts to maternity-roosting bats, including nonvolant (flightless) young,
activities that generate relatively high vibrations or noise (e.g., structural demolition, pile driving)
should be perfonned outside of the bat maternity season (April I-August 31).
• Foraging and night roosting were observed during the survey. If nighttime work is necessary for
project construction, LSA recommends that night lighting shall be used only on the portion of the
structure actively being worked on and focused on the direct area of work, and that airspace
access to and from the roost features of the structure shall not be obstructed except in direct work
areas.
• Although no foliage-roosting bat species such as western yellow bat (Lasiurus xanthinus),
western red bat (Lasiw-us b/ossevillii), or hoary bat (Lasiurus cinereus) were observed or
acoustically detected during the nighttime survey, it is possible that any of these species may
roost in the fan palm (Washingtonia sp.), willow (Salix sp.), or eucalyptus (Eucalyptus spp.) trees
within the study area because those trees provide suitable roosting habitat for these species. If tree
removal or trimming (including palm frond trimming) is necessary for project construction, this
activity should be perfonned outside of the bat maternity season (April I-August 31) to avoid
potential mortality to flightless young; this time period coincides with the clearing and grubbing
restrictions typically associated with bird nesting season.
Following the completion of the summer maternity season survey, and as construction plans with
regard to the El Camino Real bridge structures are finalized, consultation and communication
between engineers and a qualified bat biologist early in the construction planning process will aid in
the detennination and finalization of site-and species-specific measures to minimize impacts to bats
in a timely, cost-effective, and structurally successful manner.
1,29il6 «P:\HCR1402\Biology1Ba1 Survey\BatNightSurvey_ ElCammoReal docx» 6
l~AASSOi,iAlfS fN<'
REFERENCES
Erickson, G. A., E. D. Pierson, W. Rainey, and P. Brown. 2003. Hitchhikers Guide to Bat Roosts. Bat
and Bridges Technical Bulletin, California Department of Transportation, Sacramento,
California. 143 pp.
Johnston, D.S., Tatarian, G., and Pierson, E.D. 2004. California Bat Mitigation: Techniques,
Solutions, and Effectiveness. Prepared for California Department of Transportation,
Sacramento, California, and California State University Sacramento Foundation.
Keeley, B.W. and M.D. Tuttle. 1999. Bats in American Bridges. Bat Conservation International, Inc.
Resource Publication No. 4. 40 pp. http://www.batcon.org/pdfs/BatsBridges2.pdf.
Miner, K.L. and D.C. Stokes. 2005. Bats in the South Coast Ecoregion: Status, Conservation Issues,
and Research Needs. USDA Forest Service Gen. Tech. Rep. PSW-GTR-195.
Remington, S. 2000. The Distribution and Diversity of Bats in Orange County, California. Pomona,
CA: California State Polytechnic University; 114 p. M.S. thesis.
Smith, H.J., and J.S. Stevenson. 2013. The thermal environment of a concrete bridge and its influence
on roost site selection by bats (Mammalia Chiroptera). Proceedings of the 2013 International
Conference on Ecology and Transportation (ICOET 2013) (http://www.icoet.net/icoet_ 2013/
documents/papers/I COET2013 _ Paper207D _Smith_ %20Stevenson. pdf).
Attachments: Figure 1: Bat Survey Study Area
Figure 2: Location and Distribution of Bats Roosting at the El Camino Real Bridge
Figure 3: Representative Site Photos
Figure 4: Representative Site Photos
1/29116 «P \HCR 1402'Biology\Bat Survey\BatNightSunicy_EICanunoReal docx» 7
B10lOGICAl RBOURCB TECHNICAL REPORT
R,visrn JUNE 2020
El c.M,~0 R,M ., C•NNON ROAD INTERSECTION li;nov,M[NTS p,oi,c,
CITY OF CAOLSOAO, [ALIFORNI•
APPENDIX F
SPECIAL-STATUS SPECIES SUMMARY TABLE
P .\HCR1905 • ECR at C.Mon Rd lrnprovolYH!nts\STR\ECR Bndge 8TR_Rov_JuneW20_Cloan,docx (6/17/2020)
LSA
BIOtOGIC.C Resou,c,s lHHNICAt R<PORT
REVISED JUH 2020
Species I Status
Plants
Acanthomintho US: FT
iiicifolio CA: SE
CRPR: 1B.1
San Diego thorn-HMP: List 2,
mint Narrow
Endemic
Acmispon US:-
prostrates CA: SP
CRPR: lB.l
Nuttall's HMP:-
aanispon
Ado/phia US:-
ca/ifornica CA: SP
CRPR: 28.1
California HMP:-
adolphia
Ambrosia pumila US: FE
CA:SP
San Diego CRPR: lB.l
ambrosia HMP: List 2,
Narrow
Endemic
Aretostophylos US: FE
g/anduloso ssp. CA: SP
crassifolia CRPR: lB.l
HMP: List 3,
Del Mar Narrow
manzanita Endemic
El CAMONO Re,," CANNO" Roao INTE.,ECTION IMP,OVEMENTS PeoJECT
[,TY OF CARLSBAD, (AWORNIA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution I Activity Period Occurrence Probability
Annual herb endemic to active Blooms April Not Expected. Suitable
vertisol clay soils of mesas and through June habitat for this species is
valleys within grasslands, (annual herb) not present within the
chaparral, coastal scrub, and BSA. This species was not
vernal pool communities; observed during the
known from southwestern San biological resources
Diego County and Baja assessment or
California; 30 to 3,lSO feet jurisdictional delineation.
elevation.
Annual herb usually found in Blooms March Not Expected. Suitable
beaches, coastal dunes, or through June habitat for this species is
coastal sage scrub. (annual herb) not present within the
BSA. This species was not
observed during the
biological resources
assessment or
jurisdictional delineation.
Sandy/gravelly to clay soils Blooms December Low. Although
within grasslands, coastal sage through May marginally suitable
scrub, and chaparral (perennial habitat is present within
communities; known from deciduous shrub) the BSA, this perennial
western San Diego County and shrub was not observed
Baja California; 50 to 2,400 feet during the biological
elevation. resources assessment or
jurisdictional delineation.
Occurs in open habitats, usually Generally non• Low. Although
near drainages or vernal pools, flowering marginally suitable
usually in sandy loam or on clay (perennial herb) habitat is present within
(including upland clay slopes) the BSA, this perennial
from 20 to 487 meters (70 to herb was not observed
1,600 feet) elevation. Known during the biological
from western Riverside and resources assessment or
western San Diego Counties. jurisdictional delineation.
Also occurs in Mexico.
Sandy areas in maritime Blooms December Not Expected. Suitable
chaparral and coniferous forest, through April, habitat for this species is
typically on coastal mesas and with foliage year not present within the
ocean bluffs, below 365 meters round (evergreen BSA. This evergreen
(1,200 feet) elevation. Known shrub) shrub was not observed
only from San Diego County, during the biological
California. resources assessment or
jurisdictional delineation.
P·\HCR190S -ECR ot Cannon Rd lmprovem@nts\BTR\ECR Bridge BTR_Rev_June2020_Clean.doc< {6/17/2020) F-1
BIOLOGsCM R,sou,ce, T,c"""AC REPoOf
REVISE0 J~NE 2020
Species Status
Attemisio polmeri US:-
CA: SP
San Diego CRPR: 4.2
sagewort HMP:-
Atrip/ex pocifico US:-
CA: SP
South Coast CRPR: 1B.2
saltscale HMP:-
Bloamerio US:-
c/evelandii CA: SP
CRPR: lB.l
San Diego HMP:
goldenstar Narrow
Endemic
E, c.~,.o R,Ac <l C•••ON ROAD lsH,SHT10N IMe,ov, .. ,NTS P,oJ>CT
c,n o, CARLS8AO, CALIF0RN<A LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
Found in chaparral, coastal sage Blooms May Low. Although
scrub, riparian scrub, or riparian through marginally suitable
woodland. September habitat is present within
(perennial shrub) the BSA, this perennial
shrub was not obseived
during the biological
resources assessment or
jurisdictional delineation.
Alkali soils in coastal sage scrub, March through Not Expected. Suitable
playas, coastal bluff scrub, October habitat for this species is
coastal dunes, and chenopod (annual herb) not present within the
scrub below 200 meters (600 BSA. This species was not
feet} elevation, and perhaps observed during the
formerly up to about 430 biological resources
meters (1,400feet) in Los assessment or
Angeles County. In California, jurisdictional delineation.
known from the Channel
Islands and mainland Los
Angeles, San Diego and Orange
Counties. Also occurs in Mexico.
Believed extirpated from
Ventura County. Reports of this
species from Riverside County
are based on misidentification
of Atrip/ex serenana ssp.
davidsanii (The Vascular Plants
of Western Riverside County,
California. F.M. Roberts et al.,
2004).
Chaparral, coastal sage scrub, April through May Low. Although
valley and foothill grassland and (perennial herb} marginally suitable
vernal pools; 50 to 465 meters habitat is present within
(200 to 1,500 feet) elevation. the BSA, this perennial
Only known from San Diego herb was not observed
County and Baja California. dur!ngthe biological
resources assessment or
jurisdictional delineation.
P ,\HCR1905 • ECR at Connon Rd lmpro,,..ments\BTR\ECR Bridge BTR_Rev_June2020_Cleao.docx 16/17/2020) F-2
BIOIOGICAL RESOURCSS TECHNICAL R,eo"
REVISED Ju~, 2020
Species Status
Brodiaea fi/ifo/ia US: FT
CA: SE
Thread-leaved CRPR: lB.l
brodiaea HMP:
Covered,
Narrow
Endemic
Camissoniopsis US: -
lewisii CA:SP
CRPR:3
Lewis' evening· HMP:-
primrose
Ceonothus US;-
verrucosus CA: SP
CRPR: 2B.2
Wart-stemmed HMP: List 2
ceanothus
Centromodia US:-
pungens ssp. loevis CA: SP
CRPR: 18.1
Smooth tarplant HMP:-
Choenactis US: -
g/obriuscu/a var. CA:SP
orcuttiona CRPR: 18.1
HMP:-
Orcutt's
pincushion
Ee CAMl"O REAL Al CANNON ROAO INHA5'CTION IMr,D,EMENTS PROJECT
Cin OF CASlS8AD, c,u,o•~•A LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
Usually on clay or associated Blooms March Not Expected. Suitable
with vernal pools or alkaline through June habitat for this species is
flats; occasionally in vernally (perennial herb) not present within the
moist sites in fine soils (clay BSA. This perennial herb
loam, silt loam, fine sandy was not observed during
loam, loam, loamy fine sand). the biological resources
Typically associated with assessment or
needlegrass or alkali grassland jurisdictional delineation.
or vernal pools. Occurs from 25
to 1,220 meters (80 to 4,000
feet) elevation. Known only
from Los Angeles, Orange,
Riverside, San Bernardino, San
Diego, and San Luis Obispo
Counties, California.
Sandy or clay areas in coastal March through Low. Although
scrub, grassland, and woodland June (annual marginally suitable
below 300 meters (1,000 feet) herb) habitat is present within
elevation. In California, known the BSA, this species was
only from Los Angeles and San not observed during the
Diego Counties. Believed biological resources
extirpated from Orange County. assessment or
Also occurs in Mexico. jurisdictional delineation.
Chaparral in western San Diego December Not Expected. Suitable
County and northern Baja through May habitat for this species is
California; sea level to 380 (perennial shrub} not present within the
meters (1,250 feet) elevation. BSA. This perennial shrub
was not observed during
the biological resources
assessment or
jurisdictional delineation.
Alkaline areas (characteriied by Blooms April Not Expected. Suitable
clay soils) in chenopod scrub, through habitat for this species is
meadows, playas, riparian September not present within the
woodland, valley and foothill (annual herb) BSA. This species was not
grassland below 480 meters observed during the
(1,600 feet) elevation. Known biological resources
from Riverside and San assessment or
Bernardino Counties, extirpated jurisdictional delineation.
from San Diego County.
Sandy areas of coastal bluff Blooms January Not Expected. Suitable
scrub and coastal sand dunes through August habitat for this species is
below 100 meters (300 feet) (annual herb) not present within the
elevation. In California, known BSA. This species was not
only from Los Angeles, Orange observed during the
(believed extirpated), San biological resources
Diego, and Ventura Counties. assessment or
Also occurs in Mexico. jurisdictional delineation.
P·\HCR190S • ECR at Connon Rd lmprovements\BTR\EOl Bridge BTR_Rev_Jun~20W_Cleon.doe< (6/17/2020) F-3
B,o,oo·c•L RESOURCES TEC"""*' R<Po,•
R<vlSEO hNE 2020
Species Status
Comorostophylis US:-
diversifolio ssp. CA: SP
diverifolio CRPR: lB.2
HMP:-
Summer holly
Convolvulus US:-
simulans CA:SP
CRPR: 4.2
Small-flowered HMP:-
morning-glory
Corethrogyne US:-
fi/oginifo/io var. CA: SP
/in/folio CRPR: lB.1
HMP: List 3,
Del Mar Mesa Narrow
sand aster Endemic
Cryptontho US:-
wigginsii CA: SP
CRPR: 16.2
Wiggins' HMP:-
ayptantha
Deinondro US: -
panicu/oto CA: SP
CRPR: 4.2
Paniculate HMP:-
tarplant
Dichondro US:-
occidentalis CA: SP
CRPR: 4.2
Western HMP:-
dichondra
EL CAMINO REAL AT [ANNO~ Ro•o INH,S,GTION IMPRO,EM'"" PROJECl
Cm OF CASLSOAO, CA,IFO,NIA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
Chaparral or cismontane April through Not Expected. Suitable
woodland at 30 to 790 meters June (evergreen habitat for this species is
(100to2,600feet). In shrub} not present within the
California, known only from BSA. This evergreen
Orange, Riverside, and Santa shrub was not observed
Barbara, and San Diego during the biological
Counties. Also occurs in Mexico. resources assessment or
jurisdictional delineation.
Found in clay, serpentinite Blooms March Not Expected. Suitable
seeps within coastal sage scrub, through July habitat for this species is
open chaparral, and grasslands. (annual herb) not present within the
BSA. This species was not
observed during the
biological resources
assessment or
jurisdictional delineation.
Found in openings in chaparral Blooms May Low. Although
and coastal sage scrub. through marginally suitable
September habitat is present within
(perennial herb) the BSA, this perennial
herb was not observed
during the biological
resources assessment or
jurisdictional delineation.
Clay soils in coastal sage scrub. Blooms February Not Expected. Suitable
through June soil for this species is not
(annual herb) present within the BSA.
This species was not
observed during the
biological resources
assessment or
jurisdictional delineation.
Found in habitats that are Blooms between Not Expected. Suitable
considered vernally mesic and April and habitat for this species is
occasionally sandy areas with November not present within the
coastal sage scrub, vernal pools, (annual herb) BSA. This species was not
and valley/foothill grasslands observed during the
biological resources
assessment or
jurisdictional delineation.
Mostly dry sandy banks in scrub Blooms March Low. Although
or under trees; coastal sage through May marginally suitable
scrub, chaparral, oak woodland. (rhizomatous habitat is present within
Coastal Orange and San Diego perennial herb) the BSA, this perennial
Counties; elevations 50 to 520 herb was not observed
meters {200 to 1,700 feet). during the biological
resources assessment or
jurisdictional delineation.
Pc\HCR190S -ECR at Cannon Rd lmprov<,menu\BTR\ECR Bridge BTR_Rev _Ju,...2020_Clean docx (6/17/2020) F-4
BIOLOGICAL Reso"""' TECHNICAL REPOOT
REVISED JUNE 20l0
Species Status
Dudleya US:-
b/ochmaniae ssp. CA: SP
b/ochmaniae CRPR: 1B.1
HMP:
Blochman's Narrow
dudleya Endemic
Dudleya variegata US:-
CA:SP
Variegated CRPR: lB.2
dudleya HMP:-
Dudleya viscida US: -
CA:SP
Sticky dudleya CRPR: lB.2
HMP: List 2
Eryngium US: FE
aristulatum var. CA: SE
parishii CRPR: 18.1
HMP: List 3,
San Diego button-Narrow
celery Endemic
Erysimum US:-
ommophilum CA:SP
CRPR: lB.2
Sand-loving HMP:-
wallflower
,
El CAMINO REAL AT CANNON ROAO INHRHCTION , .... OV<M<NTS PaoJECT
c,n OF CARLSBAD, CALlfDRNIA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
Dry rocky places, often on day May through June Not Expected. Suitable
or serpentine, in chaparral, (perennial herb) habitat for this species is
coastal sage scrub, or grassland, not present within the
below 450 meters (1,500 feet) BSA. This perennial herb
elevation. In California, known was not observed during
only from Los Angeles, Orange, the biological resources
Santa Borbara, San Diego, San assessment or
Luis Obispo, and Ventura jurisdictional delineation.
Counties. Also occurs in Mexico.
In rocky or clay soils within May through June Not Expected. Suitable
chaparral, coastal scrub, (perennial herb) habitat for this species is
cismontane woodland, valley not present within the
and foothill grassland, and BSA. This perennial herb
margins of vernal pools; known was not observed during
from western San Diego County the biological resources
and Baja California; 3 to 580 assessment or
meters (10 to 1,900 feet) jurisdictional delineatlon.
elevation.
Rocky areas in coastal bluff Blooms May Not Expected. Suitable
scrub, chaparral, coastal sage through June habitat for this species is
scrub, and cismontane (perennial herb) not present within the
woodland from 10 to 550 BSA. This perennial herb
meters (30 to 1,800 feet) was not observed during
elevation. Known only from the biological resources
Orange and San Diego Counties, assessment or
California. jurisdictional delineation.
San Diego mesa hardpan and Blooms April Not Expected. Suitable
claypan vernal pools and through June habitat for this species is
southern interior basalt flow (annual/perennial not present within the
vernal pools; usually herb} BSA. This species was not
surrounded by coastal scrub observed during the
and valley and foothill biological resources
grassland, at 50 to 2,035 feet assessment or
elevation. Known from jurisdictional delineation.
Riverside and San Diego
Counties and Baja California.
Sandy openings within Blooms between Not Expected. Suitable
maritime chaparral, coastal February and habitat for this species is
dunes, and coastal scrub June {perennial not present within the
habitats. herb) BSA. This perennial herb
was not observed during
the biological resources
assessment or
jurisdictional delineation.
P:\HCR1~5 • ECR at Cannon Rd lmprovemont,\BTR\ECR Bridge BTR_Rev _Junel020_Cleon.docx {6/17/2020) F-5
B10,0G<CAL R,,ou,,,s TECH NI CM R,eoRT
REVISED Jct<E 2020
Species Status
Euphorbia misera US:-
CA: SP
Cliff spurge CRPR: 28.2
HMP:
Covered
Ferococtus US: -
viridescens CA: SP
CRPR: 2B.1
San Diego barrel HMP: List 2
cactus
Harpogonella US:-
pa/meri CA: SP
CRPR: 4.2
Palmer's HMP:-
grapplinghook
Hozardia orcuttii US: -
CA: ST
Orcutt's hazardia CRPR: lB.1
HMP:
Covered,
Narrow
Endemic
Hordeum US:-
intercedens CA:SP
CRPR: 3.2
Vernal barley HMP:-
lvo hoyesiano US:-
CA: SP
San Diego marsh• CRPR: 28.2
elder HMP: List 3
EL CAMINO RuL sT CANNON ROAO INT .. SECTION IMPRoveMrnr; PROJ,CT
CIH OF CARLSBAD, CA"FORNIA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
Rocky sites within coastal bluff Blooms December Not Expected. Suitable
scrub, coastal sage scrub, and through August habitat for this species is
Mojavean desert scrub at 30 to (perennial shrub) not present within the
1,650 feet elevation. Known BSA. This perennial shrub
from the Channel Islands, was not observed during
coastal Orange and San Diego the biological resources
Counties, Riverside County assessment or
deserts, ond Baja California. jurisdictional delineation.
Often on exposed, level, or Blooms May Not Expected. Suitable
south-facing slopes within through June habitat for this species is
chaparral, coastal scrub, and (perennial stem not present within the
grasslands at 10 to 1,500 feet succulent) BSA. This perennial
elevation. Known from species was not observed
southwestern San Diego County during the biological
and Baja California. resources assessment or
jurisdictional delineation.
Clay soils in openings in coastal Blooms March Not Expected. Suitable
sage scrub, juniper woodland, through May soil for this species is not
and grassland below 830 (annual herb) present within the BSA.
meters (2,700 feet) elevation. This species was not
ln California, known only from observed during the
Orange, Riverside, and San biological resources
Diego Counties and the Channel assessment or
Islands. Also occurs in Arizona jurisdictional delineation.
and Mexico.
Found in chaparral and coastal Blooms August Low. Although
sage scrub. through October marginally suitable
(perennial shrub) habitat is present within
the BSA, this perennial
shrub was not observed
during the biological
resources assessment or
jurisdictional delineation.
Vernal pools and saline flats Blooms March Not Expected. Suitable
and depressions below 1,000 through June habitat for this species is
meters (3,300 feet) elevation. (annual herb) not present within the
Known from many California BSA. This species was not
Counties. Also occurs in Mexico. observed during the
biological resources
ossessment or
jurisdictional delineation.
River washes, marshes, Blooms April Present. This species was
swamps, and playas at 30 to through October observed during the
1,6SO feet elevation. Known {perennial shrub surveys.
from western San Diego County or subshrub)
and Baja California.
Pc\liCR1905 • ECR at Cannon Rd lmprovem@nts\BTR\ECR Bridge BTR_Rev_June2020_ Clean.doc, (6/17/2020) F-6
r ...
B,oLOGICAl R,sou,c,s TECHNOCSl R"o,r
REVISED JUNE 2020
Species Status
Juncus acutus ssp. US:-
Jeopoldii CA: SP
CRPR: 4.2
Southwestern HMP:-
spiny rush
Lepidium US:-
virginicum var. CA: SP
robinson/i CRPR: 4.3
HMP:-
Robinson's
pepper-grass
Leptosyne US:-
maritima CA: SP
CRPR: 2B.2
Sea dahlia HMP:-
Lycium US:-
ca/ifornicum CA: SP
CRPR: 4.2
California box-HMP:-
thorn
Microseris US: -
douglasii ssp. CA:SP
p/atycarpha CRPR: 4.2
HMP:-
Small-flowered
mlcroseris
Myosurus minimus US: -
ssp. opus CA:SP
CRPR: 3.1
Little mousetail HMP: List 3,
Narrow
Endemic
El CAMo•o R,;, AT CANNON ROAO INHOSEC1ION 1, ... 0 .. ..,,NTS PRDJCCT
c,n OF CA'LSOAD, CAUFORN•A LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
Coastal dunes, meadows and Blooms from Not Expected. Suitable
alkaline seeps, saltwater March through habitat for this species is
marshes, and swamps and can June (perennial not present within the
be found along the coast rhizomatous BSA. This perennial herb
between northern California herb) was not observed during
and Oregon. the biological resources
assessment or
jurisdictional delineation.
Dry soils in coastal sage scrub Blooms January Low. Although
and chaparral, typically below through July marginally suitable
3,100 feet elevation. In (annual herb) habitat is present within
California, known only from Los the BSA, this species was
Angeles, Orange, Riverside, not observed during the
Santa Barbara, San Bernardino, biological resources
and San Diego Counties. assessment or
jurisdictional delineation.
Occurs in a variety of soil types, Blooms March Low. Although
including sandstone, within through May marginally suitable
coastal scrub and coastal bluff (perennial herb) habitat is present within
scrub at 15 to 500 feet the BSA, this perennial
elevation. Known from coastal herb was not observed
San Diego County and Baja during the biological
California. resources assessment or
jurisdictional delineation.
Coastal bluff scrub and coastal Blooming will Low. Although
scrub, ranging between Los occur between marginally suitable
Angeles County and Imperial December and habitat is present within
County. August (perennial the BSA, this perennial
shrub} shrub was not observed
during the biological
resources assessment or
jurisdictional delineation.
Clay soils located in cismontane Blooms between Not Expected. Suitable
woodland, coastal scrub, March through soil for this species is not
grasslands (valleys and May (annual present within the BSA.
foothills), and vernal pools. The herb) This species was not
range of habitat extends from obseived during the
Imperial County to Riverside biological resources
County assessment or
jurisdictional delineation.
Alkaline areas in vernal pools at Blooms March Not Expected. Suitable
20 to 640 meters (70 to 2,100 through June habitat for this species is
feet) elevation. In California, (annual herb) not present within the
known only from the Central BSA. This species was not
Valley of the coastal and inland obseived during the
areas of Southern California. biological resources
Also occurs in Oregon and assessment or
Me)(iCO. jurisdlctional delineation.
P ,\I-JCR190S -ECR ot C.nnon Rd lmpro~m~nts\BT~\ECR Bridge BTR_Rev_Junel020_Clean docx 16/17/2020) F-7
BIOLOO'CAL R,sou,n; Tee"~""' R,eo,T
R,VISED JeNE 2020
Species Status
Noma US:-
stenocorpum CA:SP
CRPR: 2B.2
Mudnama HMP:-
Navarretia fassa/is US: FT
CA: SP
Spreading CRPR: lB.1
navarretia HMP: List 3,
Narrow
Endemic
Nemacoulis US:-
denudate var. CA:SP
denudate CRPR: lB.2
HMP:-
Coast woolly•
heads
Pentachoeta aurea US:-
ssp. aureo CA: SP
CRPR: 4.2
Golden-rayed HMP:-
pentachaeta
Phace/ia US:-
ramosissima var. CA: SP
austrolitoro/is CRPR: 3.2
HMP:-
South coast
branching
phacelia
EL C,M1•0 REAt., CANNO• RoAO l~TERS,CTION IMPA0Vi'""" P•o1HT
CIT> OF CARL .. AD, CAc,fOR"IA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
Lake shores, riverbanks, and Blooms January Low. Although
similar intermittently wet areas through July marginally suitable
at 5 to 500 meters (20 to 1,600 {annual/perennial habitat is present within
feet) elevation. Known in herb) the BSA, this species was
California from San Diego, not observed during the
Orange, and Riverside Counties biological resources
and from San Clemente Island. assessment or
Believed extirpated from Los jurisdictional delineation.
Angeles and Imperial Counties.
Known also from Baja California
and Arizona.
San Diego hardpan and claypan Blooms April Not E1epected. Suitable
vernal pools often surrounded through June habitat for this species is
by chenopod scrub, shallow (annual herb) not present within the
freshwater marshes, and similar BSA. This species was not
sites at 95 to 4,300 feet observed during the
elevation. Known from Los biological resources
Angeles, San Luis Obispo, assessment or
Riverside, and San Diego jurisdictional delineation.
Counties. Also occurs in Mexico.
Sandy places such as coastal Blooms April Not Expected. Suitable
dunes below 100 meters (300 through habitat for this species is
feet) elevation. Known in September not present within the
California from Orange, Los (annual herb) BSA. This species was not
Angeles, and San Diego observed during the
Counties. Believed extirpated biological resources
from Santa Catalina Island. Also assessment or
occurs in Mexico. jurisdictional delineation.
Found in valley grassland and Blooms March Not Expected. Suitable
southern oak woodland within through July habitat for this species is
San Diego County. (annual herb) not present within the
BSA. This species was not
observed during the
biological resources
assessment or
jurisdictional delineation.
Commonly observed in sandy Blooms March Low. Although
and occasionally in rocky through August marginally suitable
substrates, located within (perennial herb) habitat is present within
chaparral, coastal dunes, the BSA, this perennial
coastal scrub, and coastal herb was not observed
{saltwater) marshes and during the biological
swamps. resources assessment or
jurisdictional delineation.
p·\HCR1905. ECR at Connon Rd lmp,ov•ment,\BTil\ECR Brodgo !ITR_Rev_Juno2020_aean docx 16/17/2020) F-8
r
•
BIOLOG,CAL RHOURC,S THHNICAl REPOST
R,v,s,o JuN, 2020
Species Status
Quercus du mos a US: -
CA: SP
Nuttall's scrub CRPR: 1B.l
oak HMP:
Covered
Se/aginel/a US:-
cinerascens CA: SP
CRPR: 4.1
Ashy spike-moss HMP:-
Viguiera laciniata US:-
CA: SP
San Diego County CRPR: 4.2
viguiera HMP:-
Invertebrates
Danaus p/exippus US:-
(wintering sites) CA:SA
HMP:-
Monarch butterfly
Birds
Aimophilo ruficeps US:-
canescens CA:Wl
HMP:
Southern Covered
California rufous-
crowned sparrow
EL (AM,.O REAL AT CANNON ROAD INHRHCTION IMPROV,MENTS P,OJCCT
(,r, OF (,aLSOAD, CAUFORNIA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occurrence Probability
On sandy and clay loam soils Blooms February Low. Although
near the coast within closed-through August marginally suitable
cone coniferous forest, (perennial habitat is present within
chaparral, c1nd coastal scrub evergreen shrub) the BSA, this perennial
from 50 to 1,300 feet elevation. shrub was not observed
Known from western Orange, during the biological
Santa Barbara, and San Diego resources assessment or
Counties. Also known from Baja jurisdictional delineation.
California.
Found in chaparral and coastal Blooming period Low. Although
sage scrub. Primarily Isolated to has not been marginally suitable
San Diego County (coastal identified habitat is present within
areas) but small populations (perennial the BSA, this perennial
can occur inland, in isolated rhizomatous herb was not observed
areas of north San Diego herb) during the biologic.al
County. resources i:lssessment or
jurisdictional delineation.
Found in chaparral and coastal Blooms February Low. Although
scrub in areas between San through August marginally suitable
Diego County and Orange (perennii:1I shrub) habitat is present within
County. the BSA, this perennial
shrub was not observed
during the biological
resources assessment or
jurisdictional delineation.
Winter roosts are located in September Moderate. Suitable
wind-protected tree groves through March roosting habitat
(Eucalyptus, Monterey Pine, (eucalyptus trees) for
Cypress) with nectar and water this species is present
sources nearby. within the BSA; however,
the nearest known
overwintering population
is approximately 1.6
miles northwest of the
BSA. This species was not
detected during the
biological resources
assessment or
jurisdictional delineation.
Steep, rocky, coastal sage scrub Year-round, Not Expected. Habitat
i:lnd open chaparral habitats, diurnal activity within the BSA is not
particularly scrubby areas suitable to support this
mixed with grasslands. From species.
Santa Barbara County to
northwestern Baja California.
P .\HCR1905 • ECR at Connon Rd lmprnvements\BTR\ECR Bridge BTR_Rev_Junel0l0_Oun.docx 16/17/2020) F-9
BIOLOGICAL RBOUAC" TECHNICAL R,-ou
R,v1srn '""' 2oio
Species Status
Campylorhyncus US:-
brunneicapil/us CA: SSC
sandiegensis HMP:-
San Diego cactus
wren
Po/iopti/o US: FT
californica CA: SSC
californica HMP:
Covered
Coastal California
gnatcatcher
Rallus longirostris US: FE
/evipes CA: SE, CFP
HMP:
Light-footed Covered
dapper rail
Vireo be/Iii pusillus US: FE
CA: SE
Least Bell's vireo HMP:
Covered
EL c,.,,,.o REALAf CANNON ROAO INTE,SECTION , ... ,.ov, ... ,NTS P,o,,c,
CiTT Of CASLSBAO, CALIFORNjA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period Occ,mence Probability
Inhabits coastal sage scrub, Year-round (non-Not EKpected. Habitat
nesting almost exclusively in migratory) within the BSA is not
thickets of cholla (Opuntia suitable to support this
pro/if era) and prickly pear species.
(Opuntia littora/is and Opuntia
oricolo), typically below 150
meters (500 feet) elevation.
Found in coastal areas of
Orange County and San Diego
Counties, and extreme
northwestern Baja California,
Mexico.
Inhabits coastal sage scrub in Year-round Moderate. Suitable
low-lying foothills and valleys in habitat for this species is
cismontane southwestern present within the BSA. It
California and Baja California. was not detected during
the biological resources
assessment or
jurisdictional delineation.
Found in salt marshes traversed Year-round, Not Expected. Habitat
by tidal sloughs, where vocalizes at night, within the BSA is not
cordgrass and pickleweed are dawn, and dusk suitable to support this
the dominant vegetation. species.
Requires dense growth of
either pickleweed or cordgrass
for nesting or escape cover;
feeds on mollusks and
crustaceans. Coastal southern
California and northern Baja
California.
Riparian forests and willow April through Moderate. Suitable
thickets. The most critical September habitat for this species is
structural component of least present within the BSA. It
Bell's vireo habitat in California was not detected during
is a dense shrub layer 2 to 10 the biological resources
feet (0.6-3.0 meter) above assessment or
ground. Nests from central jurisdiction~I delineation.
California to northern Baja
California. Winters in southern
Baja California.
P·\HCR1905 • ECR at Connon Rd lmp,ovement>\BTR\£CR Br;di• BTR_Rev_J"nol.020_ Clean.doc, (6/17/2020) F-10
BIOlDGICAL R"0URCES T,cHNICAl R"0RT
REVISED JUNE 2020
Species Status
Mammals
lasionycteris US:-
noctivagons CA:SA
HMP:-
Silver-haired bat
lasiurus b/assevillii US:-
CA: SSC
Western red bat HMP:-
lasiurus cinereus US: -
CA:SA
Hoary bat HMP:-
Lasiurus xanthinus US:
CA: SSC
Western yellow HMP:-
bat
Myotis US:-
yumanensis CA:SA
HMP:-
Yuma myotls
El CAMINO REAL AT CANNON ROAO INreAS,n,o• '""""M'"" PRDJ£Ct
CIH OF CAALSOAO, CAL1FOONIA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Habitat and Distribution Activity Period I Occurrence Probablllty
Inhabits forested areas, where Primarily the Low, Conditions within
it forages in small clearings, warmer months the BSA are likely not
along roadways and water-ideal for roosting, but
courses, and among trees. foraging individuals may
Generally roosts in trees but occasionally visit the site.
occasionally enters buildings or Not detected during the
caves. Prefers old growth areas bat survey.
with snag densities of at least
21 per hectare. Range extends
from extreme north-eastern
Mexico north to Alaska and east
to the Atlantic Coast.
Forages over a wide range of Primarily the Moderate. Suitable
habitats, but generally roosts in warmer months roosting and foraging
woodlands and forests. Ranges habitat for this species is
throughout most of California present within the BSA.
west of the deserts. Not detected during the
bat survey.
Forages over a wide range of Primarily the Moderate. Suitable
habitats, but prefers open warmer months; roosting and foraging
habitats with access to trees, leaves colder habitat for this species is
for roosting, and water. Ranges areas during present within the BSA.
throughout most of California. winter Not detected during the
bat survey.
Varied habitats, but usually Primarily the Moderate. Suitable
near water; often associated warmer months roosting and foraging
with palm trees. Southwestern habitat for this species is
United States to southern present within the BSA.
Mexico. Not detected during the
bat survey.
Optimal habitats are open Primarily the Present. This species was
forests and woodlands with wanner months observed during the bat
sources of water over which to survey.
feed. Common and widespread
in California. Uncommon in the
Mojave and Colorado Desert
regions, except for mountains.
Ranging generally from sea
level to 2,440 meters (8,000
feet). Roosts in buildings,
mines, caves or crevices;
occasionally in swallow nests
and under bridges.
Pc\HCR1905 -ECR at Qmnon Rd lmpro,..,menta\BTR\Ec:R Bridge BTR_R~_J"ne2020_Clean.dDCx (6/17/20201 F-11
B<OLOGICAL Ruou,c .. TeCHNICAL REPOST
REvi"o JuN, 2020
EL CAMINO ReAL AT CANNON Ro•o INTER5'CTION IM"O"Mrnrs PROHCf
c,n OF cu,;e,o, CALIFORNIA LSA
SPECIAL-STATUS SPECIES SUMMARY TABLE
Species Status Habitat and Distribution Activity Period Occurrence Probablllty
Neotomo /epida US:-Found in desert scrub and Year-round, Not Expected. Habitat
intermedia CA: SSC coastal sage scrub habitat, mainly nocturnal, within the BSA is not
HMP:-especially in association With occasionally suitable to support this
San Diego desert cactus patches. Builds stick crepuscular and species. Not detected
woodrat nests around cacti, or on rocky diurnal during the biological
crevices. Occurs along the resources assessment or
Pacific slope from San Luis jurisdictional delineation.
Obispo County to northwest
Baja California.
Nyctinomops US:-Usually associated with cliffs or Primarily the Low, Conditions within
femorasacco CA: SSC rock outcrops, often near warmer months the BSA are likely not
HMP:-riparian habitat. Occurs from ideal for roosting, but
Pocketed free-the southwestern United States foraging individuals may
tailed bat to central Mexico. occasionally visit the site.
Not detected during the
bat survey.
Nyctinomops US:-Primarily arid regions from Primarily the Low. Conditions within
mocrotis CA: SSC southwestern United States to warmer months the BSA are likely not
HMP:-northern South America. ideal for roosting, but
Big free-tailed bat foraging individuals may
occasionally visit the site.
Not detected during the
bat survey.
Perognothus US: FE Historically occupied open April through Not Expected. Habitat
/onglmembris CA: SSC habitats on sandy soils along September within the BSA is not
pacifjcus HMP: the coast from Los Angeles to suitable to support this
Narrow the Mexican border. Now species. Not detected
Pacific pocket Endemic known from only four sites in during the biological
mouse Orange and San Diego Counties. resources assessment or
jurisdictional delineation.
LEGEND
US: Federal aasslflcatlons
No applicable classification
FE Taxa listed as Endangered.
FT T axa listed as Threatened.
CA: State Casslflcations
SE Taxa State-listed as Endangered.
SSC California Species of Special Concern. Refers to animals with vulnerable or seriously declining populations.
CFP California Fully Protected. Refers to animals protected from take under Fish and Game Code S"ections 3511, 4700, SOSO, and 5515.
WL California Bird Species of Special Concern Watch List.
SA Special Animal. Refers to any other animal monitored by the Natural Diversity Data Base, regardless of its legal or protection status.
SP Special Plant. Refers to any other plant monitored by the Natural Diversity Data Base, regardless of its legal or protection status.
lB California Rare Plant Rank lB: Rare, threatened, or endangered in California and elsewhere.
2B California Rare Plant Rank 2B: Rare, threatened, or endangered in California, but more common elsewhere.
3 California Rare Plant Rank 3: A review list of plants about which more information is needed.
P .\l-lCRl905 • ECR at Connon Rd lmprovemenls\BTR\OCR Brid~e BTR_Rev_June2020_dean.docx 16/17 /2020) F-12
LEGEND
B,o,OOICSl RBOUOCB TECHNICAL R"ORl
R,visrn )UN[ 2020
EL CM,rNO REAL AT CANNON ROAO INHRSHJION IMPAO'IUHNJS PRO!Hl
CITY OF CARLS .. O, C•LIFO,NIA LSA
4 California Rare Plant Rank 4: A watch list of plants of limited distribution.
CRPR Extensions
0.1 Seriously endangered in California (greater than 80% of occurrences threatened/high degree and immediacy of threat).
0.2 Fairly endangered in California (20 to 80% occurrences threatened).
California Rare Plant Ranks are assigned by a committee of government agency and non-governmental botanical experts and are not official State designations of rarity status.
City of Carlsbad Habitat Management Plan (HMP) Oassifications
List 2
List 3
Covered
Narrow
Endemic
Species not covered by the HMP.
Species coverage contingent on other MHCP Subarea plans being permitted
Species coverage contingent upon funding for management of conserved areas
Species for which take authorization is provided because Jong-term viability has been determined to
be adequately maintained underthe HMP.
Species with restricted geographic distributions, soil affinities and/or habitats, and, for purposes of
the HMP, species that in addition have important populations within the HMP area, such that
substantial loss of these populations or their habitat within the HMP area might jeopardize the
continued existence or recovery of that species.
P ,\HCR190S -ECR at Cannon Rd lmprovements\BTR\ECR Bridie BTR_Rev_June2020_Clean.docx (6/17/2020) F-13