HomeMy WebLinkAbout; Carlsbad Blvd Bridge Replacement Encinas Creek; Carlsbad Blvd Bridge Replacement Encinas Creek; 2005-11-30EDAW
E^'^'" '""^ November 30, 2005
1420 KETTNER BOULEVARD Mr. Christopher M. Muehlbacher, P.E.
SUITE 620 Associate Engineer
City of Carlsbad, Public Works - Engineering
1635 Faraday Avenue
Carisbad, Califomia 92008
SAN DIEGO CALIFORNIA
TEL 619 233 1454
FAX 619 233 0952
UNITED STATES
AUSTRALIA
RE: Southbound Carlsbad Boulevard Bridge Replacement Biological
Resources Survey
Dear Mr. Muehlbacher:
The purpose of this letter report is to present the fmdings of the biological resource
survey conducted for the Southbound Carlsbad Boulevard Bridge Replacement
" Project (project) to the City of Carisbad (City). The purpose of the biological survey
is to (1) compile a list of plant and animal species that occur within the site,
(2) identify plant communities and distribution, (3) summarize jurisdictional wetland
delineation, and (4) identify potential opportunities and constraints during proposed
bridge replacement activifies.
The project is located approximately 0.5 mile south of Palomar Airport Road in
Carlsbad, Califomia, between Island Way and Solamar Drive (refer to Figures 1 and
2). The survey boundaries were provided digitally by the City on October 18, 2005.
The boundary was adjusted per the City's direction to limit the study area to the edge
of northbound Carlsbad Boulevard. The study area is approximately 6.15 acres. The
survey area, as provided by the City, includes approximately 500 feet north and 300
feet south of the southbound bridge, extending 200 feet east to northbound Carlsbad
Boulevard, and extending west to the ocean. This survey provides necessary
information to assist the City during the engineering and planning phase for the
replacement of the southbound bridge.
Project Description
The existing bridge was buih in 1928 and includes two southbound lanes. The bridge
is approximately 65 feet wide by 26 feet long.
Methodology
Prior to conducting the field survey, a review of existing data from the Multiple
Habitat Conservation Program's Vegetation Communities with Sensitive Species and
Vernal Pools map for the Encinitas Quad (SANDAG n.d.) was performed to
determine if there have been any occurrences of biological sensitive resources
previously reported within or adjacent to the study area. In addition, a search of the
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 2
Califomia Department of Fish and Game's (CDFG) Califomia Natural Diversity
Database (CNDDB) RareFind 3 version 3.0.5 was conducted.
The City's 1999 Habitat Management Plan (HMP) and the North County Multiple
Habitat Conservation Program (MHCP) were reviewed. Both the HMP and MHCP
propose to identify how government agencies, in cooperation with federal and state
wildlife agencies, can regionally preserve the diversity of species and habitat while
allowing for development. Specifically, the HMP provides guidelines to address
impacts to vegetation communities, and plants and wildlife species in Carlsbad. A
review of each document was included in the research for this letter report.
EDAW biologists John Messina and John Ko conducted a biological survey on
October 26, 2005. The survey was conducted by walking through the site and
recording plants and animals observed. Vegetafion communities were mapped on a
recent, color aerial photograph at a scale of 1 inch = 20 feet. A wetland determination
and delineation was performed pursuant to the Corps of Engineers Wetland
Delineation' Manual (Environmental Laboratory 1987). The survey began at
7:00 a.m. and the weather was slightly overcast with an approximate temperature of
70° F and a slight on-shore breeze, less than five miles per hour.
Due to the project schedule, the survey was conducted at the time of year when spring
ephemeral plant species and migratory animal species would not have been
observable.
Vegetation Communities
The study area is divided by southbound Carlsbad Boulevard. The west side is
predominantly sandy beach and the east side is predominantly nonnative vegetation
with native vegetation concentrated adjacent to Encina Creek and remnant patches
scattered throughout. The road is elevated above a trapezoidal profile constmcted of
soil and reinforced with riprap on the west side. The ocean reaches the riprap placed
at the road foundation during high fides. This portion of Carlsbad Boulevard is a
divided road with southbound lanes separated from the northbound lanes by
approximately 200 feet of disturbed native and nonnative habitats. The road crosses
historically low land that has remnant salt marsh species such as pickleweed
{Salicornia spp.) and salt grass {Distichlis spicata). Much of the vegetation between
the northbound and southbound lanes of Carlsbad Boulevard is dominated by the
nonnative plant species Hottentot fig {Carpobrotus edulis). Encina Creek crosses
under the portion of the bridge proposed for replacement.
DESIGN, PLANNINS AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 3
The habitat communities within the study boundary include beach, open water,
disturbed salt marsh, disturbed. coastal and valley freshwater marsh, disturbed
wetlands, disturbed southem coastal bluff scmb, and disturbed habitat. In addition,
developed areas occur within the study area. Each of the plant communities is
described in detail below and depicted in Figure 3. Table 1 hsts the acreage of each
of these communities within the study area. See Appendix A for a list of individual
plant species observed within the study area.
Beach and Open Water
The beach west of Carlsbad Boulevard is devoid of vegetation because of public use.
The open water is devoid of vegetation due to permanent inundation.
Disturbed Southem Coastal Salt Marsh
Disturbed southem coastal salt marsh is dominated by pickleweed, salt grass, alkali
heath {Frankenia salina), and Hottentot-fig. Other species include Parish's glasswort
{Salicornia subterminalis), pineapple weed {Amblyopappus pusillus), grass poly
{Lythrum hyssopifolium), msh {Juncus sp.), annual beardgrass {Polypogon
monspeliensis), coast goldenbush {Isocoma menziesii var. vernonoides), sweetclover
{Melilotus sp.), and coyote bush {Baccharis pilularis). The plant community is
identified as disturbed because of the possibility of fill dirt and encroachment by
Hottentot-fig throughout the fill slopes and constmction of the northbound and
southbound lanes of Carlsbad Boulevard.
Disturbed Coastal and Valley Freshwater Marsh '
The disturbed coastal and valley freshwater marsh is limited to the lower banks of the
open water channel associated with Encina Creek. The freshwater marsh vegetation
varies in width between 5 and 15 feet on either side of the open water. The plant
community is dominated by broad-leave cattail {Typha latifolia), salt marsh fleabane
{Pluchea odorata), and cocklebur {Xanthium strumarium). Pickleweed, giant reed
{Arundo donax), and common celery {Apium graveolens) were also present, but in
smaller numbers. This plant community is considered disturbed because of its
relatively small size (0.5 acre) and encroachment by Hottentot-fig and trash washed
from upstream, covering as much of the ground as the vegetation.
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City ofCarlsbad, Public Works - Engineering
November 30, 2005
Page 4
Disturbed Wetlands
The disturbed wetlands occur at a small swale, approximately 3 feet wide, that is
approximately 50 feet east of the southbound bridge. The swale begins south of the
study area at a culvert under northbound Carlsbad Boulevard and drains north into
Encina Creek. For most of its length, within the study area boundary, the limits of the
swale are difficult to discern because of the dense mat of Hottentot-fig. In some
areas, the flow of this swale may be strictly subsurface. Curly dock {Rumex crispus)
and spotted spurge {Chamaesyce maculata) are the two most common species in the
swale. Other less common species are salt heliotrope {Heliotropium curassavicum),
salt marsh fleabane, and cocklebur. ^
Disturbed Southem Coastal Bluff Scmb
Disturbed southem coastal bluff scmb is limited to a small patch of windswept
lemonadeberry {Rhus integrifolia). Other species typical of this community were
scattered in the disturbed areas within and immediately adjacent to the study area.
These included saltbush {Atriplex sp.) and a single individual of Califomia desert-
thom {Lycium californicum). This plant community is considered disturbed because
of its extremely small size (less than 0.1 acre) and surrounding nonnative vegetation.
Disturbed Habitat
Disturbed habitat is the most prevalent plant community within the study area. This
plant community is dominated by Hottentot-fig, which is the predominant cover
throughout the study area. Other species present as minor components include
crystalline iceplant {Mesembryanthemum crystallinum), Russian thistle {Salsola
tragus), Australian saltbush {Atriplex semibaccata), common stock {Matthiola
incana), pampas grass {Cortaderia sp.) and sea rocket {Cakile maritima). Several
native species were scattered throughout the manufactured slopes such as Califomia
buckwheat {Eriogonum fasciculatum ssp. fasciculatum), coastal cholla
{Cylindropuntia prolifera), Califomia croton {Croton californicus), and ephedra
{Ephedra sp.). These native species were extremely sparse, consisting of a few
individuals each, and appeared to have only recently invaded the manufactured
slopes, rather than represent remnant patches of historical habitat, as the salt marsh
species seem to do. These patches of natives do not provide more than 10 percent
cover and are therefore not considered native habitat.
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 5
Developed
Developed areas include areas of the road and shoulder that do not support any
biological resources.
Table 1
Vegetation Communities and Acreages within the
Carlsbad Boulevard Study Area
Vegetation Community Acreage
Beach 0.90
Open water 1.36
Disturbed southem coastal salt marsh 0.58
Disturbed coastal and valley freshwater rnarsh 0.50
Disturbed wetlands 0.01
Disturbed southem coastal bluff scmb 0.04
Disturbed habitat 2.12
Developed 0.64
Totals 6.15
Wildlife
Wildlife species within the study area are limited due to the lack and disturbed nature
of the habitat. As discussed earlier, the habitat on the east and west sides of the
bridge is distinctly different. A majority of vegetated areas, and hence wildlife
habitat, occurs east of the bridge. The sandy beach occurs west of the bridge and as
mentioned previously is devoid of vegetation. Bird species observed east of the
bridge included great blue heron {Ardea herodias), black phoebe {Sayornis
nigricans), song sparrow {Melospiza melodia), house finch {Carpodacus mexicanus),
northem harrier {Circus cyaneus), red-winged black bird {Agelaius phoeniceus),
mouming dove {Zenaida macroura), and common raven {Corvus corax). Califomia
ground squirrel {Spermophilus beecheyi) burrows were also observed east of the
bridge. Bird species observed west of the bridge included brown pelican {Pelecanus
occidentalis), sanderlings {Calidris alba), and semipalmated plover {Calidris pusilla).
Bird species such as northem harrier and common raven were only observed flying
overhead, and the brown pelicans were observed flying over the incoming surf and
not necessarily utilizing the study area. (See Appendix B for a complete list of
wildlife species observed within the study area.)
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 6
Sensitive Vegetation Communities
Sensitive vegetation communities are those regulated by the U.S. Army Corps of
Engineers (ACOE) pursuant to Section 404 of the Clean Water Act and Section 10 of
the Rivers and Harbors Act; regulated by CDFG pursuant to Sections 1600-1616 of
the Califomia Fish and Game Code; regulated by the Califomia Coastal Commission
(CCC) pursuant to the Califomia Coastal Act and federal Coastal Zone Management
Act; or considered sensitive under the City's HMP (1999).
The open water, salt marsh, coastal and valley freshwater marsh, and disturbed wetland
habitats are all considered sensitive habitats regulated by the ACOE, CDFG, arid CCC.
These habitats are also considered sensitive by the City. The coastal bluff scmb is
considered sensitive by the City (1999) and the beach is regulated by the CCC. In
addition, certain areas of the disturbed habitat are considered sensitive by the CDFG
and CCC because these areas meet their definition of wetlands. By definition, wetlands
have to meet three criteria (vegetation, hydrology, and soil) to be considered ACOE
wetlands but only need to meet one of three criteria to be considered wetlands by the
CDFG. Though the CCC extent of wetiands conforms to the limits of ACOE wetiands,
the CCC takes jurisdiction of an additional 100 feet measured outward from the edge of
the wetlands as a wetland buffer. Several areas of the disturbed habitat meet the hydric
soil criteria and are thus considered wetiands by the CDFG and but not the ACOE.
Portions of these disturbed areas also fall within the CCC 100-foot wetland buffer.
Refer to the Wetland Delineation Report for a more detailed description. Lastly, the
CCC takes jurisdiction of all areas 500 feet inland of any beach habitat, which would
include the entire study area.
The project is located in Carlsbad and is subject to the City's Habitat Management
Plan for Natural Communities in the City of Carlsbad (1999). The study area is not
designated by the HMP as a Core, Linkage, or Special Resource Area. The study area
falls within Local Facility Management Zone 22 and the HMP vegetation map
designates the study area as "disturbed" vegetation. In addition, the study area is not
considered an Existing or Proposed Hardline Conservation Area or Proposed
Standards Area as defined by the HMP.
Sensitive Plant and Wildlife,Species
Sensitive species are those that are:
• listed as endangered, threatened, or proposed for listing as endangered by the
U.S. Fish and Wildhfe Service (USFWS);
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 7
• listed as endangered, threatened, or rare by the CDFG (2005a, b);
• considered "special vascular plants, bryopytes, or lichens" (CDFG 2005);
• on the Califomia Native Plant Society (CNPS) Inventory of Rare and
Endangered Plants of California (CNPS 2001);
• considered "Special Animals" (CDFG 2004); or
• HMP "Covered Species" or "Narrow Endemics" known from the City (City of
Carisbad 1999).
Cahfomia desert-thom, a CNPS List 4 species, was the only sensitive plant species
observed within the study area during the survey. CNPS List 4 species are species
with "limited distribution or infrequent throughout a broader area in Califomia, and
their vulnerability or susceptibility to threat appears relatively low at this time"
(CNPS 2001). Only one individual was observed within the study area. The study
area was surveyed extensively and the potential for other individuals occurring within
the study area is considered low.
The northem harrier, a CDFG "Califomia Special Concem species," and the great
blue heron, a CDFG "Special Animal," were the two sensitive animals observed
within the study area. There are many sensitive plant and animal species known from
coastal communities within Carlsbad.
Appendix C lists the sensitive plant and animal species known from the vicinity of the
study area that could potentially occur within, or use the study area, based upon the
presence of suitable habitat. None of these species were observed during the survey.
Most of these species are either not expected to occur or have a low potential of
occurrence due to the disturbed nature of the habitats within the study area.
The sandy beach immediately west of the bridge is subject to ocean surf and tides.
This area may provide habitat for gmnion {Leuresthes tenuis). Gmnion spawn
between March and September depending upon the lunar and tidal cycles, with peak
spawning mns between late March and early June. Gmnion is a game species
regulated by CDFG.
The Migratory Bird Treaty Act of 1918 protects all migratory birds and most resident
birds of North America, including bird species identified during the survey. Some of
these common birds could potentially nest within the study area; however, the
potential is relatively low due to the disturbed nature of the site.
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E. '
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 8
Wetland Delineation
The study area does contain areas that are under the jurisdiction of the ACOE, CDFG,
and CCC. Figure 3 depicts the areas of each jurisdiction. Areas under ACOE
jurisdiction include nonwetland waters of the U.S. and wetlands within and
immediately adjacent to Encina Creek. Areas under CDFG and CCC jurisdiction are
inclusive of, but extend beyond the limits of ACOE jurisdiction (Figure 3).
The Wetland Determination and Delineation Report for Southbound Carlsbad Bridge
is included as a separate attachment and describes in detail the results of the wetland
determination and delineation. Approximately 2.3 acres of ACOE jurisdictional
waters ofthe U.S. and 0.6 acre of wetlands, 3.6 acres of CDFG jurisdictional wetiand
habitat, and 5.0 acres of CCC jurisdictional wetlands (including the wetland buffer)
occur within the study area. The acreages of CDFG and CCC jurisdictional wetlands
include the 2.3 acres of ACOE jurisdictional waters of the U.S. and 0.6 acre of
wetlands.
The delineation report is subject to review and approval by the resource agencies
(ACOE, CDFG, and CCC).
Potential Biological Resources Constraints
The sensitive habitats described above, (i.e., beach, open water, disturbed southem
coastal salt marsh, disturbed coastal and valley freshwater marsh, disturbed wetlands,
and disturbed southem coastal bluff scmb), especially those regulated by the ACOE,
CDFG and CCC, pose the most likely constraint to the proposed project, because
these resources are immediately adjacent to the bridge. Any potential impacts to
these regulated habitats would require regulatory authorizations from these agencies
and compensatory mitigation.
Impacts to the Califomia desert-thom, which is located more than 100 feet from
southbound Carlsbad Boulevard and the bridge, are not likely to pose a constraint
given the low population number, the relatively low sensitivity status of this species,
and the very disturbed condition of its habitat. Though the surveys were conducted at
a time of year when ephemeral sensitive plant species would not have been
observable, it is anticipated that other sensitive plant species are absent from the study
area due to its highly disturbed condition.
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 9
In addition, the area immediately west of the bridge is a sandy beach subject to ocean
surf and tides. This area may provide habitat for gmnion. Gmnion spawn between
April and August depending upon the lunar and tidal cycles. Gmnion are a game
species regulated by the CDFG. It is anticipated that the CCC will also need to be
consulted regarding potential effects to gmnion spawning.
Although somewhat limited, the study area potentially provides habitat for nesting
migratory birds. Most of the area covered by Hottentot-fig is not suitable for nesting.
Measures to Reduce Potential Impacts
The following measures are preliminary and will be refined upon completion of
engineering plans for the proposed bridge realignment and subsequent discussions
with the resource agencies. Impacts to resources such as jurisdictional waters and
wetlands, native habitat, and potential gmnion spawning areas should be avoided to
the maximum extent practical during design and constmction. There is a paved
shoulder on the east side of the road (south of the bridge) that could be used for a
staging area. In addition, any of the Hottentot-fig that is not considered jurisdictional
can be used during constmction without constraint. Additional measures to reduce
potential impacts are hsted below.
1. Impacts to ACOE jurisdictional habitats would require the issuance of a
Department of Army Permit (Nationwide Permit 14 for Linear
Transportation Crossings is anticipated as the impacts to jurisdictional
habitats are expected to be below the one-third-acre threshold of tidal waters
and non-tidal adjacent wetlands. Impacts to CDFG jurisdictional habitats
would require a 1602 Streambed Alteration Agreement. Impacts to CCC
jurisdictional areas would require a Coastal Development Permit. Issuance
of a Department of Army 404 Nationwide Permit would require a Section
401 Certification from the Califomia Regional Water Quality Control Board.
Impacts to any jurisdictional wetland habitats would require compensatory
mitigation. The exact compensation requirements would be negotiated with
the appropriate resource agencies (e.g., ACOE, CDFG, and CCC) during the
permitting process. However, federal, state, and local agencies generally
require a no net loss goal of wetland habitat. It is assumed that the required
mitigation ratios would vary depending upon the type of replacement habitat.
2. Appropriate Best Management Practices (BMPs) will need to be developed
to minimize impacts to water quality.
DESIGN, PLANNING ANO ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineering
November 30, 2005
Page 10
3. Though other sensitive plant species have a low potential for occurrence
within the study area, if the area of potential impacts extends beyond the
existing bridge footprint or beyond the limits of the manufactured slopes of
the existing roadway, a spring rare plant survey should be conducted to
verify the presence of sensitive plant species.
4. To verify if nesting birds are present during constmction, a qualified
biologist should perform preconstmction surveys, prior to clearing of
vegetation.
5. If grading impacts resulted in the loss of beach and/or southem coastal bluff
scmb, the project would require compensation of habitat at a 3:1 mitigation
ratio as required by the City's HMP.
6. Fee compensation is also required for the loss of the disturbed habitat, as
required by the City's HMP.
7. Migratory nongame native birds are protected by the federal Migratory Bird
Treaty Act of 1918 (50 C.F.R. Section 10.13). To be in comphance with this
Act, vegetation clearing should occur outside of the nesting season, generally
March 1 through August 31. However, raptors can be active earlier
(Febmary) and, if present, vegetation clearing would be restricted as early as
Febmary. The resource agencies (USFWS and CDFG) require that direct
and indirect impacts to nesting/breeding bird species be avoided. The
agencies typically require a 500-foot buffer from constmction where nesting
activities would have to be monitored. Potential harm to native avian species
dm-ing this time frame can be avoided by confirming nesting birds are not
present prior to performing clearing and gmbbing of vegetation. Once the
vegetation is cleared, nesting birds are unlikely be an issue.
8. Minimize impact to beach sand during the gmnion spawning season (March
- September). Since the gmnion spawning mns are influenced by tides, the
CDFG publishes the "Expected Gmnion Run" on its website where it lists the
expected dates and times of the spawning mns. The affected beach area
should be monitored by a qualified professional biologist.
9. There is a foot path that leads from the housing development northeast of the
project site to an area approximately 100 feet north of the bridge. The CCC
reviews coastal access and may require this trail to stay open or be rerouted
during and after constmction activities.
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
EDAW
Mr. Christopher M. Muehlbacher, P.E.
City of Carlsbad, Public Works - Engineeriiig
November 30, 2005
Page 11
We can meet to discuss the results of the biological survey and mapping information
at your convenience. Please feel free to contjact me at (619) 233-1454.
Sincerely, \
Teresa Wilkinson
Senior Project Manager
Attachments: Figure 1 - Regional Map
Figure 2 - Vicinity Map
Figure 3 - Biological Resources
Appendix A - Plant Species List
Appendix B - Animal Species List
Appendix C - List of Sensitive Species within Project Vicinity
05080171 Carlsbad Bridge Bio Survey
DESIGN, PLANNING AND ENVIRONMENTS WORLDWIDE
Literature Cited
Califomia Department of Fish and Game (CDFG). 2003. Califomia Natural Diversity Database
(CNDDB) RareFind 3.
Califomia Department of Fish and Game (CDFG). Califomia Natural Diversity Database
(CNDDB). 2005a. State and Federally Listed Endangered and Threatened Animals of
California. January 2005. 11pp.
Califomia Department of Fish and Game (CDFG). California Natiiral Diversity Database
(CNDDB). 2005b. State and Federally Listed Endangered, Threatened, and Rare Plants of
California. April 2005. Mpp.
Califomia Department of Fish and Game (CDFG). Califomia Natiiral Diversity Database
(CNDDB). 2005c. Special Vascular Plants, Bryophytes, and tiichens List. April 2005. 88pp.
Califomia Department of Fish and Game (CDFG). Califomia Natural Diversity Database
(CNDDB). 2004. Special Animals. August 2004. 47pp.
Califomia Native Plant Society (CNPS) 2001. Inventory of Rare and Endangered Plants of
California (sixth edition). Rare Plant Scientific Advisory Cornmittee, David Tibor, Convening
Editor. Califomia Native Plant Society. Sacramento, CA x + 3|88pp.
City of Carisbad. 1999. Habitat Management Plan for Natural Communities in the City of
Carlsbad.
Environmental Laboratory. 1987. Corp of Engineers Wetland Delineation Manual. Technical
Report Y-87-1. U.S. Army Engineer Waterways Experiment Station. Vicksburg, Mississippi.
Hickman, J. (ed.). 1993. The Jepson Manual: Higher Plants of Califomia. University of
California Press.
SANDAG. n.d. Vegetation Communities with Sensitive Species and Vernal Pools map for the
Encinitas Quad.
Figure 1
Regional Map
South Carlsbad Boulevard Bridge
2005\05080I7I SoMh Carlsbad Bhil Briitse\6CrapMcs'J'igiires\ResionalMap.Jhll (P.Moreno) 11/23/05
Source: USGS, Encinitas Quad (1975)
O 2000 1000 0 2000 Feet
Scale: 1 : 24,000; 1 inch = 2000 feet
Figure 2
Vicinity Map
South Carlsbad Boulevard Bridge
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APPENDIX A
VASCULAR PLANT SPECIES OBSERVED
The following vascular plant species were observed iii the study area by EDAW
biologists John Messina and John Ko during site surveys conducted on October 26, 2005.
* Introduced, nonnative species
GYMNOSPERMAE
Cupressaceae
Cupressus macrocarpa
Ephedraceae
Ephedra sp.
ANGIOSPERMAE: DICOTYLEDONAE
Aizoaceae
* Carpobrotus edulis
* Mesembryanthemum crystallinum
Anacardiaceae
Rhus integrifolia
Apiaceae
* Apium graveolens
Asteraceae
Baccharis pilularis
Baccharis salicifolia^
* Centaur ea melitensis
* Amblyopappus pusillus
Gnaphalium californicum
Heterotheca grandiflora
Isocoma menziesii var. vernonioides
Pluchea odorata
Xanthium strumarium
CONE-BEARING PLANTS
Cypress Family
Monterey cypress
Ephedra Family
Mormon tea
DICOT FLOWERING PLANTS
Carpet-weed Family
Hottentot-fig
Crystal ice plant
Sumac Family
Lemonade berry
Carrot Family
|Common celery
Sunflower Family
|Coyote bush
Mulefat
Tocalote
Pineapple weed
]Califomia everlasting
jTelegraph weed
Coastal goldenbush
Marsh fleabane
Common cocklebur
Boraginaceae
Heliotropium curassavicum
Borage Family
Salt heliotrope
Observed outside of study area.
A-l
Brassicaceae
* Cakile maritima
* Matthiola incana
Mustard Family
Sea-rocket
Common stock
Cactaceae
Cylindropuntia prolifera
Chenopodiaceae
Atriplex sp.
. Atriplex semibaccata
Salicornia subterminalis
Salicornia virginica
* Salsola tragus
Cactus Family
Coastal cholla
Goosefoot Family
Saltbush
Australian saltbush
Parish's pickleweed
Common woody pickleweed
Russian-thistle
Convolvulaceae
* Calystegia sp.
Euphorbiaceae
* Chamaesyce maculata
Croton californicus
Morning-glory Family
Moming glory
Spurge Family
Spotted spurge
Califomia croton
Fabaceae
Lotus scoparius var. scoparius
* Melilotus indica
Legume Family
Coastal deerweed
Yellow sweetclover ^
Frankeniaceae
Frankenia salina
Frankenia Family
Alkali heath
Lythraceae
* Lythrum hyssopifolium
Nyctaginaceae
Mirabilis californica
Polygonaceae
Eriogonum fasciculatum
* Rumex crispus
Solanaceae
Lycium californicum
* Nicotiana glauca
Solanum americanum
Loosestrife Family
Grass poly
Four O'clock Family
Califomia wishbone bush
Buckwheat Family
Califomia buckwheat
Curly dock
Nightshade Family
Califomia box thom
Tree tobacco
White nightshade
A-2
ANGIOSPERMAE: MONOCOTYLEDONAE MONOCOT FLOWERING PLANTS
Cyperaceae
Cyperus sp.
Sedge Family
Nutsedge
Juncaceae
Juncus sp.
Poaceae
* Arundo donax
* Bromus diandrus
* Bromus madritensis ssp. rubens
* Cortaderia sp.
Distichlis spicata
* Polypogon monspeliensis
Typhaceae
Typha latifolia
Rush Family
Rush
Grass Family
Giant reed
Ripgut grass
Foxtail chess
Pampas grass
Saltgrass
Rabbitfoot grass
Cat-tail Family
Broad-leaved cat-tail
Taxonomy and scientific nomenclature conform to Hickman (1993).
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APPENDIX B
ANIMAL SPECIES OBSERVED
This is a list of the conspicuous aerial insects, bony fishes, amphibians, reptiles, birds,
and mammals noted in the study area by LSA biologists. Presence may be noted if a
species is seen or heard,' or identified by the presence of tracks, scat, or other signs.
Species not native to the study area
AVES BIRDS
Pelecanidae
Pelecanus occidentalis
Pelicans
Brown pelican
Ardeidae
Ardea herodias
Herons, Bitterns, and Allies
Great blue heron
Accipitridae
Circus cyaneus
Hawks, Kites, Eagles, and Allies
Northem harrier
Charadriidae
Charadrius semipalmated
Plovers and Lapwings
Semipalmated plover
Scolopacidae
Calidris alba
Sandpipers, Phalaropes, and Allies
Sanderling
Columbidae
Zenaida macroura
Pigeons and Doves
Mouming dove
Tyrannidae
Sayornis nigricans
Tyrant Flycatchers
Black phoebe
Corvidae
Corvus corax
Crows and Jays
Common raven
Emberizidae
Melospiza melodia
Emberizids
Song sparrow
Icteridae
Agelaius phoeniceus
Blackbirds
Red-winged blackbird
Fringillidae
Carpodacus mexicanus
Fringilline and Cardueline Finches and Allies
House finch
B-1
MAMMALIA MAMMALS
Sciuridae Squirrels, Chipmunks, and Marmots
Spermophilus beecheyi^ Califomia ground squirrel
' Burrows observed.
B-2
APPENDIX C
SENSITIVE SPECIES POTENTIALLY OCCURRING
WITHIN THE STUDY AREA
Species Status Potential for Occurrence Onsite
Plants
South coast saltscale
(Atriplex pacified)
CNPS List IB This aimual occurs in coastal bluff habitats. This
species was not observed during the survey, which
coincided with its traditional blooming period. This
species is not expected to occur within the study
area due to the lack of appropriate habitat and
general disturbed condition of the study area.
Lewis' evening primrose
{Camissonia lewisii)
CNPS List 3 This annual occurs in coastal grasslands. This
species was not observed during the survey which
did not coincide with its traditional blooming period
(Mar.-April). This species is not expected to occur
within the study area due to the lack of appropriate
habitat.
Orcutt's pincushion
{CIraenactis glabriuscula var.
orcuttiana)
CNPS List IB This annual occurs in sandy areas along the coast.
This species was not observed during the survey
which was conducted outside of its traditional
blooming period (Mar.-May). This species has a
low potential for occurrence within the study area.
Sea dahlia
{Coreopsis maritima)
CNPS List 2 This herbaceous perennial occurs in scmb habitats
along the coast. This species was not observed
during the survey which was conducted outside of
its traditional blooming period (Mar.-May). This
species is not expected to occur within the study
area due to the limited amount of appropriate habitat
and the disturbed condition of that habitat.
Del Mar Mesa sand aster
{Coretiirogyne filaginifolia var. linifolia)
CNPS List IB
HMP Covered
HMP Narrow
endemic
This herbaceous perennial occurs in sandy,
sometimes disturbed habitats along the coast. This
species was not observed during the survey which
was conducted outside of its traditional blooming
period (July-Sept.). This species has a low potential
for occurrence within the study area.
Cliff spurge
{Eupiiorbia misera)
CNPS List 2
HMP Covered
This shmb species occurs in scmb habitats along the
coast. This species was not observed during the
survey and is not expected to occur within the study
area.
Nuttall's lotus
{Lotus nuttallianus)
CNPS List IB This annual occurs in sandy areas and beaches along
the coast. This species was not observed during the
survey which was conducted outside of its
traditional blooming period (Mar.-June). This
species has a low potential for occurrence within the
study area due to the disturbed condition of any
appropriate habitat.
Coast wooly-heads
{Nemacaulis denudata var. denudata)
CNPS List IB This annual occurs in sandy areas and beaches along
the coast. This species was not observed during the
survey which was conducted outside of its
traditional blooming period (April-Sept.). This
species has a low potential for occurrence within the
study area due to the disturbed condition of any
appropriate habitat.
C-1
Species Status Potential for Occurrence Onsite
Estuary seablite
{Suaeda esteroa)
CNPS List IB This perennial subshmb occurs in coastal salt marsh
habitats. This species was not observed during the
survey, which coincided with its traditional
blooming period. This species is not expected to
occur within the study area due to the disturbed
condition of the appropriate habitat.
Animals
Westem snowy plover
{Charadrius alexandrinus nivosus)
FT
CSC
This species nests in sandy areas typically along
beaches. This species was not observed during the
survey and is not expected to nest or breed in the
study area due to the high recreational use ofthe
beach.
Belding's savannah sparrow
{Passerculus sandwicliensis beldingi)
SE
HMP Covered
This species occurs in salt marsh habitats. This
species was not observed during the survey and not
expected to occur within the study area, due to the
disturbed condition of the salt marsh habitat.
Califomia least tem
{Sterna antillarum browni)
FE
SE
HMP Covered
This species nests in sandy areas typically along
beaches. This migrant would not have been
observable during the survey. However, this
species is not expected to nest or breed in the study
area due to the high recreational use of the beach.
Mexican long-tongued bat
{Choeronycteris mexicana)
CSC This species could potentially roost under the bridge
but was not observed during the survey. This
species is not expected to occur within the study
area.
Status Listings
U.S. Fish and Wildlife Service (USFWS): FE = Federal endangered; FT = Federal threatened
Califomia Department of Fish and Game (CDFG): SE = State endangered; CSC = Species of Special Concem
California Native Plant Society (CNPS):
List IB: Plants rare, threatened, or endangered in Califomia and elsewhere
List 2: '^Plants Rare, threatened, or endangered in Califomia, but more common elsewhere
List 3: Plants about which we need more information - a review list
City of Carlsbad Habitat Management Plan (HMP):
Covered = Species that are covered under the Take Authorization of the HMP
Narrow Endemic = Species that have a very narrow distribution '
C-2