HomeMy WebLinkAbout3466; OLIVEHAIN RD WIDENING AND REALIGNMENT; CONCEPTUAL RIPARIAN MITIGATION DESIGN FOR HOME DEPOT; 1993-05-01I
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I Conceptual Riparian Mitigation Design
I for Home Depot - Encinitas Project
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Prepared for
Greenberg Farrow Architects I .
11941 Fitch Road
Irvine, California 92111
I for Home Depot Inc.
Encinitas Project
I Prepared by
Ogden Environmental and Energy Services Co, Inc
1 5510 Morehouse Drive
San Diego, California 92121
(619) 4584044
I Brad
Compiled by
Burkhart and John Minchin
1 May 1993
Project No 310401000
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I TABLE OF CONTENTS
I SECTION TITLE PAGE
' 1 INTRODUCTION
2 RIPARIAN MITIGATION DESIGN. 2-1'
I 2.1 Plant Palettes , ' 2-1
2.2 ' Buffer Zone 2-6
2.3 Commercial Development Compatibility 2-6 :
3 PROJECT DESCRIPTION . 3-1
3.1 Qualifications and Responsibilities of Persons Developing Plans 3-1
3.2 Dedication' . . . .. 3-2
I 3.3 . Bonding . . 3-2
3.4 Installation Specifications . 3-3
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Contractor Education . . 3-3.
3.4.2 Timing of Construction . . 3-3
3.4.3 Site Protection . . , 3-3 1 3.4.4
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Site Grading
3.4.5 General Planting Specifications , 3-5
3.4.6
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' Exotic Weed Species Removal . 3-8
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4 5-YEAR MITIGATION MAINTENANCE PROGRAM 4-1
4.1 ' Time Frame ' , . . ,. . 4-1
I 4.2 Responsibilities : . .
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4.2.1 Owner •. ' ' 4-1
4.22 'Cit)i of Encinitas . 4-1 1 4.2.3 Revegetation Designer 4-2
4.2.4 ' Installation Contractor, ' . ' . 4-2
I . 4.2.5 Maintenance Contractor ' . . 4-2
4.3 . . Contractor Education . . 4-3
I ' 4.4 Contractor Guarantees ' 4-3
4.5 Irrigation System Maintenance ' . 4-13
I 4.5.1
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System Repair , ' . 4-3
4.5.2 . ' , 'System Cycle Documentation . . . 4-3
4.5 .3 . System Removal . ... . .4-3 . . , .
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I • TABLE OF CONTENTS (Continued)
I SECTION • TITLE PAGE
4.6 Weeding • 4-4
I • 4.7 Staking and Caging • 4_4•
4.8 : Dead. Plant Replacement • . . 4-5
I 4.9 Trash and Debris Removal 45•
4.10 Motorized Vehicle. Access . • • 4-5
4.1.1 Pest Control • 4-6
I • 4.12 Fertilization . 4-6
• 4.13 Grease Trap Cleaning • 4-6
I. 4.14 Cleaning of Water Runoff Treatment Basins • 4-6
t 5 5-YEAR MONITORING PROGRAM . • 5-1
. 5.1 Time Frame and Purpose 5-1
5.2 Horticultural Monitoring • 5-1
5.3 Botanical Monitoring •
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5.4 Monitoring Reports . 5..3
5.4.1 W During Construction 5-3
5.4.2 After Construction • • • . 5-3
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6 SUCCESS STANDARDS AND REMEDIAL MEASURES 6-1
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6.1 Purpose and Basis for Standards • • 6-1
6.2 . Scope of Remedial Measures . 6-1
6.3 . Project Success Standards and Recommended Remedial I Measures • • • 6-1
6-4 Modification of Monitoring Period . 6-2
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LIST OF FIGURES
NUMBER TITLE •• • PAGE
1 Regional Location of Project • • 1-2
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Project Vicinity Map. • • • . • • 1-3
• Conceptual Wetland Mitigation. Design
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I TABLE OF CONTENTS (Continued)
I LIST OF TABLES
I NUMBER TITLE PAGE
I 1 Mitigation Planting Palettes 2-3
I LIST OF APPENDICES
I LETTER TITLE PAGE
A Biotechrncal Report for Site A-i
I B U.S. Army Corps of Engineeis - Nationwide 26 Permit-
Approval for Project B-i
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C Waste Water Treatment Wetland Design C-i
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SECTION 1
INTRODUCTION ..
The following, document is designed to summarize, in one report, all facets of the
conceptual riparian mitigation plan for the Home Depot Encinitas project. The Home Depot
Encinitas Specific Plan Area occupies a 37.3 acre site at the southeastern corner of
El Camino Real and Olivenhain Road in Encinitas (See Figures 1 and 2). The northern
portion of the site bordering Olivenhain Road includes the Encinitas Creek flood plain.
This flood plain contains a total of 11.6 acres of wetlands, composed primarily of
freshwater/brackish marsh, salt marsh, riparian woodland, disturbed alluvial shrublands
and fallow field wetlands. The construction of the Home Depot project will result in the
loss of 0.1 acres of riparian woodland and 2.9 acres of fallow field wetlands, totaling
3.0 acres of wetland losses. (See Appendix A, Biological Technical Report, for greater
detail). The remaining wetlands on site will be protected by a permanent open space
preserve. The project proponent intends to mitigate for the loss of the impaëted wetlands
through the creation of 0.7 acres of new wetlands. and the enhancement of 3.7 acres of
existing degraded wetlands, presently dominated by. fallow field growth and other invasive
exotic plant species. Thus a total of 4.4 acres of new and enhanced wetlands will be
created to compensate for the 3.0 acre loss. This constitutes a 1.5:1 replacement-ratio.
This level of mitigation is considered sufficient to mitigate site impacts to a level of
insignificance since the wetlands being impacted have insignificant 'riparian cover (see
Appendix A). .
TO date the project has been reviewed by the U.S Army Corps of Engineers (Corps) and
has been given approval to proceed under the Nationwide 26 Clean Water Act Program
(Corps letter of approval is included as Appendix B). The purpose of this document is to
further refine the conceptual plan for the riparian mitigation areas, such that the application
for the necessary 1603 Streambed Alteration Agreement, required by the California
Department of Fish and Game, can be successfully accomplished. Also the final
development plan has been further refined since the initiation of the original 404 permit
process, thus it is the project proponents intent to update the U.S. Army Corps of
Engineers with the refinements indicated in this document.
This report is divided into six major sections. Section 1 is this introduction. Section 2
will cover the intended riparian mitigation design, as well as a discussion of the intended
plant species and areas proposed as riparian mitigation sites. Section 2 will also discuss in
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greater detail the intended planting palette for the required nuisance water treatment
wetlands, which will be installed in association with this project (see. Appendix Q.
1 . Although these nuisance water wetlands will not be a part of the mitigation acreage, they
will nevertheless contribute to wetland values m two ways First, they will assure that
I runoff water entering the wetland areas from the project is filtered of pollutants before
entering the drainage. Oil/water separators will be installed as backup. protection to this
system Secondly, these wetlands will provide additional wetland habitat values since it is
I, required that they be re-vegetated with appropriate marsh species.
Section 3 Of this document will specify the installation guidelines which should be followed
in implementing the riparian mitigation program Section 4 will then specify the
I requirements for a 5 year post-construction maintenance program for the wetland preserve
and revegetation areas. Section 5 will delineate the requirements for a 5 year biological and
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horticultural monitoring program to assure project success. Finally, Section 6 will specify
the success standards which the project will be-required to meet and the potential remedial
measures which may need to be implemented should the project fail to meet these
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I SECTION 2
RIPARIAN MITIGATION DESIGN•
The conceptual wetlands mitigation design for this site is shown in. Figure 3. This
I mitigation plan has been further refined from the original design concept to better suit the
various, ecological factors which exist on. the site. Four basic habitat types will be created
or enhanced at the site These include willow woodlands or enhanced woodlands, riparian
brackish/freshwater In scrub, enhanced salt marsh, and marsh. addition, a coastal sage
scrub border will be implemented along the roads and parking lot slopes bordering the
I project on the north,, south, and west. Minor down grading/excavation and surface weed
removal will be necessary to create the willow, brackish marsh, and riparian' scrub habitats.
I .. A combination of container plantings and seedings will be utilized to establish new
vegetation in each of these habitat areas. Only container plantings will' be utilized in the salt
marsh enhancement areas.
2.1 PLANT PALETTES
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Woodland Creation/Enhancement .
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.'Willow
This habitat type will be created primarily along the northern and eastern boundaries of the
I .Home Depot Parking Lot, in an area which borders existing willow woodland and salt
marsh vegetation. One to three feet of excavalion will be necessary in this area to bring the
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surface elevation near enough to the existing watertable to support the intended vegetation.
The main species which will be utilized in this habitat area are given in Table 1; these
include arroyo willow (Salix lasiolepsis), sandbar willow (Salix hindsiana), and mulefat
I (Baccharis glutinosa) in the overstory; and spiny rush (Juncus acutus), yerba mansa
(Anemopsis californica), and San' Diego marsh elder (Iva hayesiana) in the understory. In
I addition Fremont cottonwood (Populus fremontii.) will be utilized along the parking lot
edge to provide a higher level buffer between the parking lot and the wetlands. All
I exotic/invaded species including pampas grass (Corraderia 'selloana) and eucalyptus
(Eucalyptus spp.) will be removed from the entire wetland and enhancement areas as a part
of this revegetation effort.
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71TOBREMOVET";J ___ LEGEND -
/ I ) L I WILLOW WOODLANDCC2EATION/ENHANCEMENT
• IRIPARIAN SCRUB CREATION/ENHANCEMENT
Al !SALT MARSH ENHATCEMENT
2.S Ise BRACKISH MARSH/RSH WATER MARSH CREATION
•\ \/ I. NUISANCE WATER 1rEATMENTWETLANDS
CREATION
'UPLAND/COASTAL S1GE SCRUB BUFFER CREATION
1 r' EXISTING ALKALI-I4EA1JH TO REMAIN
(Frarikenia sauna)
EUCALYPTUS 14, EXISTING BRACKISH MARSH/FRESH WATER MARSH
' TO BE REMOVED ____ EXISTING WILLOW WOODLAND VEGETATION T REMAIN O
I \\I 1EXISTING SALT MARSH TO REMAIN (Salicornia sp.)
' - ' \ \ '. \ \ \ \ \ - +. EXISTING PAMPAS GRASS TO BE REMOVED
• •• •. fcc;. \ \ \ •.•,,\ -'. .• • -
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I Table 1
MITIGATION PLANTING PALETTES
Willow Woodland Container Plant Palette S
(Goal 75% cover by overstory species and 10 % cover for understory species)
Overstory
arroyo willow Salzx laszolepss
sandbar willow Sahx hzndzana
I mulefat Baccharis glutinosa
Fremont cottonwood Pop ulusfremontu
I arrow weed Puichea serzcea
Understory
I San Diego marsh elder Iva hayesiana
spiny rush Juncus acutus
Douglas mugwort Artemisia douglaszana
giant wild rye Elymus condensarus
Willow Woodland/Riparian Scrub Seed Mix
spiny rush Juncus acutus I Hooker's primrose Oenorhera hookeru
halberd-leaf saitbush Atriplex parula ssp hastata
yerba mansa Anemopszs caisfornica
Douglas mugwort Arremisia douglasiana
giant wild rye Elymus condensarus
coastal sunflower Encelia Calzfornzca
coast goldenbush Haplopappus venetus I zorro fescue Fesruca megalura (riparian scrub area only)
western ragweed Ambrosia psyilosrachya
Riparian Scrub Container Plant Palette
I (Goal 80 % cover by container plantings)
mulefat Baccharis glunnosa
upright coyote bush Baccharis pilularis ssp consan guinea
spiny rush Juncus acutus
giant wild rye Elymus condensarus
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Table 1 (Continued)
MITIGATION PLANTING PALETTES
Salt Marsh Container Plant Palette
(Goal the addition of 20 % cover into enhanced saltmarsh areas)
alkali heath Frankenia salma
pickleweed Salzcornui vzrginzca
spiny rush Juncus acutus
Brackish Marsh/Fresh Water Marsh Container Plant Palette
(Goal: 100 % cover by container species at 4 feet on center)
bulrush Scirpus calzfornzcus
alkali rush Scirpus robustus
Upland Coastal Sage Scrub Buffer Container Plant Palette
(Goal: 20 % cover by container species)
California sagebrush Arremisia caljfornica
flat-topped buckwheat Erzogonu,nfascicularwn
California sunflower Enceha californica
California desert thorn Lycium ca1zforiuca
lemonadeberiy Rhus integrifolia
Upland"Coastal Sage Scrub Buffer Seed Mix
coast golden bush Haplopappus venerus
California sagebrush Arremisia calfornica -
flat-topped buckwheat Erzogonwnfasczcularu,n
coast sunflower Enceiza calzfor,uca
giant wild rye Elymus condensarus
California poppy Eschscholzza calzfornzcd
arroyo lupine Lupinus succulenrus
phaceha - Phaceha ranaceufoha
310401000 2-4
Riparian Scrub
Along the northern edges of the existing drainage, at slightly greater distances from the
stream channel and generally separated from the stream channel by salt marsh vegetation,
new riparian scrub habitat will be created. This area will also receive a slight amount of
down/excavation to bring it ino the floodplain influence. Mulefat, arrow weed (Puichea
servicea), and coyote bush (Baccharis pilularis spp consan guinea) will be the primary
overstory species utilized here Coast golden bush (Happlopappus venetus), San Diego
marsh elder, Hooker's primrose (Oenothera hookeri), and Douglas mugwort (Artemisia
douglasiana) will be the main understory species This habitat type will also have scattered
Fremont cottonwoods utilized as a buffer along its edges
Salt Marsh
Areas designated for salt marsh (enhancement on site will be improved through initial
removal of dead woody annual species and then the addition of several salt marsh species
into the openings created by prior- degradation of site vegetation and the areas left after
weeding procedures are complete Pickleweed (Salzcornza vzrgznzca), alkali-heath
(Fran/cenia sauna), and spiny rush will be utilized to create this habitat type (See Table 1).
These plants will be planted from containers in small patches throughout the enhancement
area. The salt marsh enhancement area will be located on the north side of the drainage
between the existing salt marsh and the .riparian scrub areas
Brackish Marsh
Several brackish marsh areas will be created by excavation of small areas of vegetation
currently dominated by weedy species, to levels slightly below the water, table. It is
anticipated that once these areas are graded they will fill with water and then container
plantings of bulirush (Scirpus californicus) and alkali rush (Scirpus robustus) will be
planted into the newly created basins (See Table 1) The nuisance water treatment wetlands
will also be planted with the bulrush
Upland/Coastal Sage Scrub Buffer -
Along the upland borders of the wetlands, coastal sage scrub vegetation cover will be
planted from seed and containers The species which will be utilized in this area are listed
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I in Table 1. The predominate species utilized will be California sage brush (Arremisia
californica), coast sunflower (Encelia californica), and coastal buckwheat (Eriogonum
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fascicularwn).. It is intended that this vegetation cover will be thick enough to discourage
entry into the wetland areas and will supplement the fence protection which is already
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2.2 BUFFER ZONE
The-wetland mitigation areas will also provide a 50-100 foot biological buffer zone of
I native vegetation cover between the existing wetland and the development and 50 feet of
unstructured buffer to further protect the wetlands from future disturbance. Thus an overall
I . 150 foot planning buffer is intended from the wetlands to the building, Which will include
the paved parking lot area in front of the Home Depot building. .-
2.3 COMMERCIAL DEVELOPMENT COMPATIBILITY .
I - Site planning and design features of the commercial development should have minimal
impacts on the existing wetlands. Commercial development has the advantage over
I residential development incompatibility, since domestic pets will not be a factor and access
will be better controlled. Most pedestrian and vehicular traffic will occur near the building,
which has been located as far from the wetlands as possible. No buildings will be located
within at least 100 feet of the existing wetland edge. Vehicular traffic and parking areas
will occur near the wetlands on only peak operating days. The site will drain into torn
sewers: however; a combination of oil interceptors and nuisance water treatment wetlands
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will also be located at the perimeter of,parking areas to prevent creek contamination from
Finally fencing be polluted runoff. protective will provided along the wetland edges on all
sides which face roadways. . . . .
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I ) SECTION 3
CONSTRUCTION INSTALLATION REQUIREMENTS
This section describes installation specifications and requirements for the proposed
revegetation plantings. These specifications and requirements will be incorporated into the
final landsape construction documents for the project. All final construction documents
will be approved by a qualified riparian revegetation designer before they are let for bid.
3.1 QUALIFICATIONS AND RESPONSIBILITIES OF PERSONS DEVELOPING
-- PLANS
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I An experienced riparian revegetation designer (see requisite qualifications below) will work
with a landscape architect registered in the State of California to develop final landscape :.
plans and a civil engineer registered in the State of California to develop final grading plans
for the revegetation sites. The revegetation designer will review and approve all final
I planting
grading. plans developed by the civil engineer. The revegetationdesigner willdevelop
in design irrigation layouts and consult with the landscape architect the of the
layout and final specifications set. The landscape, architect will be responsible for the
I preparation of final planting plans, irrigation plans, and specifications. The revegetation
designer will review and approve all final landscape drawings and specifications before
these plans are issued for bid. The landscape architect • will be responsible for the
preparation of an installation cost estimate for the project which will be used for bonding
and bidding purposes.
The revegetation designer or firm shall have the following minimum qualifications:
- At least one year's training and/or local experience in growing the native plant
I species used in the project (either in a nursery setting Or in the field).
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Knowledge of the vegetation associations proposed for the revegetation effort,
including species identity, general composition for both overstory and
- understory, and species' ecological positions relative to the water table.
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A minimum of 2 years of practical horticultural experience, i.e., maintenance
and/or and of growing propagating plants. -
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I - 4. A minimum of 2 years of college level study and 2 years of field experience in
landscape design and construction, including a knowledge of. both irrigation
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system design and planting plan development
3.2 DEDICATION .
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The project owner will assurethat all revegetation areas are placed in natural open space I .
easements within the City of Encinitas (City) and that these easements restrict any and all
future building/grading (except for flbod control purposes) within the revegetation areas.
,..,., .,. 3.3 BONDING
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The applicant shall enter into a secured agreement with the City which will cover the.
I . -amount of money necessary to install, monitor, and report on the revegetation plans until -
the end of a five-year monitoring period. This agreement will be secured by a form of
security acceptable to the City, estimate shall include a.6 percent annual inflation rate.. This
security will be held by the City until the following conditions are met:
Installation completion:
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- 1. The revegetation designer certifies in writing to the City that the project has been
installed according to the intent of the p13.11. .
- 2. The City inspects the grading and landscape installations and determines them to.
I be acceptable. (Installation monies will be refunded at the -end of successful
. installation determined by the City.) . as .-
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I . 5-Year Monitoring period completion:
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1. The revegetation designer/horticultural monitor and/or project biologist.
- concludes in the final monitoring report that all success criteria have been met.
I for the project and that no additional remedial measures remain to be completed
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2. The City. all other permitting resource agencies having jurisdiction over the
have project approved successful completion of the mitigation efforts.
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3.4 INSTALLATION SPECIFICATIONS .
This section covers all activities, relating to the installation of the riparian mitigation
landscape plans, including contractor education, construction timing, site protection
grading, irrigation installation and frequency,. general planting specifications, contract
growing, substitutions, sources, and guarantees. -
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3.4.1 Contractor Education .
Before the beginning of any grading or installation work, all contractors who Will complete
some aspect of the plans will meet at the site with the project revegetation designer. The
revegetation designer will review all requirements of the plan and associated wetland
permits which concern the contractor including site protection, inspections, landscape
procedures, and guarantees. It shall be made clear to the contractor(s) that the revegetation
designer will have final supervisory control along with the landscape architect over field
installation.
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3.4.2 Timing of Construction . .
The installation of the project will be coordinated in such a way that grading takes place
during the same year as irrigation and planting installation. Landscape installation must
immediately follow grading/clearing without any delay. Areas may be landscaped (i.e.,
irrigated and planted) at any time of year. . .•
3.4.3 Site Protection
Protection During Construction ..
Existing wetlands and the proposed revegetation sites will be protected during the project
wetland and construction process by construction fencing. Construction fencing will limit
access into the revegetation areas to workers and machines implementing the plans. It will
also assure that the existing riparian vegetation is not damaged during, installation of the:
mitigation plans. Additional fencing may also be required by the revegetation designer
during grading of the revegetation areas to protect the existing ripanan vegetation on site if
deemed necessary. The biologist/revegetation designer will flag the location of the fencing
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I locations. This fencing will remain in place until all facility grading and/or excavation work V
is completed, at-which time, upon approval of the biologist/revegetation designer, it may be
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V removed if other construction activities will not harm existing riparian vegetation.
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.The project revegetation designer will certify in writing to the City that the limits of the
V V work area have been properly fenced befàre the contractor may proceed with work. If at
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any time workmen or machines damage vegetation I outside the limits.-of work, the
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full having designer contractor.will bear the cost of the revegetation complete a restoration
plan for the area. as well as the costs 'formonitoring the success of the revegetation
according to the same standards as theorigina1 revegetation. The contractor will also be
responsible for repairing all damage to protective fencing within one week of such damage. V
The.project revegetation designer will haveV final discretion in all protective fencing and may
at any time require additional fencing if it is deemed necessary to protect existing native
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vegetation or the revegetation areas. V
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I: Only construction equipment necessary to accomplish the landscape installation will be
allowed in the revegetation area. Workers' vehicles will be parked outside the riparian
open space and all equipment will be removed from t'he site as soon as its task is
completed. No vehicular fluids will be added or changed onsite. V V
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- . . Post-construction Protection V V
I. V is After construction completed and during the 5-year monitoring period, the revegetation
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V site and wetland edges will be fenced by permanent 5-foot chain link fencing, or other '
fencing by designer approved the revegetation as appropriate, on all sides except those
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which directly abut existing riparian vegetation. The first post-construction monitoring V
1 report to the City will certify that ,this fencing Vhas been completed. to. the satisfaction of the
project revegetation designer. The purpose of fencing will be to keep Vail non-maintenance
V persons and vehicles out of the revegetation area at all times. Additional fencing will be
added during the monitoring period whenever the revegetation designer/biological monitor
determines that it is necessary lo eliminate human or vehicular entry into the project site.
Any breaks in fencing will be repaired within one week by the landscape contractor. . V
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1 3.4.4 Site Grading
The project revegetation designer 'Will supervise grading to assure that final grades
adequately match the depths to water table required to support the revegetation types in the
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landscape plans. Final approval of site.grading will be made in writing to the City, before
irrigation installation proceeds. .
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During grading operations, desirable topsoils, as specified by the revegetation designer,
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will be stockpiled and redistributed. to the project after grading is completed. Topsoil
be done in by the 'revegetation designer. stockpiling will only areas approved
I . Grading vQrk will remain always withizi the limits of work set by the revegetation designer
'in the field before the commencementof grading. The contractor will be liable for repair of.•
• any damage beyond these, limits as per the requirements of the original revegetation plan.
I . If fill soils are needed they must be 'approved by the revegetation' designer prior .to
placement. Generally, no fill soils are expected to be used in this project.
1 All cut soils that are not needed will be iemoved from the revegetation tes and disposed of.
offsite in a legally acceptable manner.,
Grading equipment will not remain onsite longer than necessary to complete the required
I work. No oil or other fluids from grading equipment will be dumped onsite..
I 3.4.5 General Planting Specifications, . .
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Contract Growing and Sources •, ' T. " .. •, , , .. .. .
If possible, arrangements will be made' 9-12 months before the expected planting date to
I grow all container plant materials and seed required for revegetation work. 'An additional
10 percent of the total number of container plants will be grown for replacements. A copy
of this contract will be submitted to the revegetation designer by the contractor as
verification of this matter. Contract growing will be conducted by an experienced native
I. plant nursery or seed company such' as, but not limited to, Tree of Life Nursery, San Juan
Capistrano, CA; Mockingbird Nursery, Riverside, CA; or S & S Seeds, Carpintéria, CA.
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Substitutions
The contractor is expected to secure all plant materials well in advance of the expected
planting date. No substitutions above 10 percent of any species number specified will be
allowed, and sizes shall not be changed. If the contractor is unable to obtain the proper.
species, specified at the, time of planting, commencement of the guarantee period will be
delayed until all plants specified are planted. Substitution of plant materials at the time of
planting depends solely upon the discretion, of the project revegetation designer.
Plant Iiispection' ,
All plant materials will'be inspected by the revegetation designer and approved as healthy,
disease free, and of proper size prior to planting. In addition, the revegetation designer will
approve the final layout of all plant materials in the field'prior to planting to assure their
correct ecological positioning. .
Sources
It is preferred that the source of all propagules and seed used at the.site be secured from
wild sources within San Diego County that are as close to the revegetation sites as possible.
The revegetation designer will work closely with the contractor and the suppliers to
approve all sources of plant materials. The contractor will provide the revegetation
designer with information on the sources of all plant and seed materials grown/collected for
the project for final approval. If necessary, the project revegetation designer will help the
'grower locate local sources for plant materials.
Irrigation System Inspection . .
Final layout of the irrigation system will be approved in the field by the revegetation
designer/landscape architect prior to planting installation. Any major changes to the
irrigation system, would be reviewed and approved by the project landscape architect.
310401000 , 3-6 ' .
I' Container Planting Practices
I Container plants will be planted using standard horticultural practice, utilizing a hole twice
the diameter of the rootball and leaving the plant crown 2 inches above grade after planting..
I Backfilled holes will be irrigated on several days prior to planting, to settle the soil.
I All plants will be thoroughly watered in their pots before planting. Likewise, the soilin all
planting holes will be wetted-before planting.
I A backfill mix containing only native soil mixed with .7 lbs. per cubic yard of Os,mocote
18-6-12 slow release fertilizer or equivalent will be used. In addition, container plantings
I will receive Agriform (21 gram 20-10-5) slow release fertilizer tabs at the rate of one for
1-gallon, and two for 5-gallon. These tabs will be placed no deeper than 8 inches from the
1 soil surface.
I No pruning of' plant materials will be, allowed unless specified by the revégetation
designer/biologist.
I Staking of trees will only be implemented if considered necessary by the revegetation
designer at the time of planting. All staking will be with two 2-inch diameter by 8-foot'
I wooden posts on either side of the plant with tree ties holding the trunk to the post at the
lowest possible level of support. Staking will be' removed as soon as trees can support
1 themselves.
Container Plant Guarantees '
All plants determined to be dead or diseased by the revegetation designer will be replaced
120 days after installation by the contractor and then as required by the maintenance
program. Unless substitutions are approved by the revegetation designer, the replacement
plants shall be of the same size and species as originally planted.
I Hydroseeding Specifications
I '
- Hydroseeding will be done after the completion of all container plantings. The areas to be
hydroseeded will be watered for two weeks prior to seeding after container planting is
completed. All weeds growing at the end of two weeks will' be sprayed with Rodeo
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310401000 3-7
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herbicide or equivalent and then the weeds 'allowed to die over the course of the next week.
Any weeds left alive at the end of the third week will be hand cleared by the contractor prior
to hydroseeding The ground will be thoroughly wetted prior to hydroseeding
Hydroseeding will proceed only after the revegetation designer certifies that hydroseed site
preparation work has been completed.
In areas where different hydroseed mixes will be used, the final limits of the areas to be
seeded will be approved by the revegetation designer.
Hydroseed quality will be the best obtainable in the- year of application for both purity and,
germination. No seed shall be more than one year old when applied
Amount of seed purchased, germination, and purity of seed will be provided in writing to
the revegetation designer by the contractor forall seed used.
During hydroseeding, all plant materials 1 gallon or smaller, will be covered with 15-gallon-
planting containers during the hydroseeding process to prevent seeding around ,theirbases.
These cans will not remain in place longer than 1 hour and will be removed as soon as
possible after seeding takes place
Once seed is in place, the contractor will be responsible for supplying sufficient irrigation
to adequately germinate and establish the seed applied. The irrigation system will be
checked by the contractor for malfunctioning and/or damage to individual heads every other
day for the first three weeks after seeding, and repairs will be made immediately.
Hydroseed Guarantees
The contractor will guarantee a 70 percent coverage rate at '120 days or respray all areas
where inadequate seed establishment has taken place at the direction of the revegetation
designer. The revegetation designerwill determine the need for respraying.
3.4.6 Exotic Weed Species Removal
'The contractor shall remove completely from both the mitigation and wetland preserve open'
space areas of the site all establish plants and seedlings of the following species during the
310401000 3-8
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I SECTION 4
I
5-YEAR MITIGATION MAINTENANCE PROGRAM
I
41 TIME FRAME
'on ce the revegetation designer certifies that revegetation plantings have been completed, a
I
. 5-year maintenance and monitoring period will begin, to assure project success. This
I period may be extended per City, or resource agency direction based upon recommendation
of the project revegetation designer that the project has not met its performance standards.
4.2 RESPONSIBILITIES
I
421 Owner
I The owner will be responsible for hiring both a qualified revegetation designer and
I. landscape contractor for all phases of installation. He will also be responsible for hiring a
landscape maintenance contractor for the 5-year maintenance period. The owner may, with ' sole discretion, replace any of these parties. If the revegetation designer/biological monitor
is replaced, the owner must notify the City of the new designer. Finally, the owner shall
pay the City to hire the revegetation designer to carry out the 5-year mitigation monitoring
5 program
5 .4.2.2 City of Encinitas
I The City shall have responsibility for overall final approval of the project and the
completion of all required post construction monitoring measures Landscape installation
I .
during construction will be reviewed and approved in the revegetation areas by the City
landscape inspector. After construction is completed the City will hire the project
revegetation designer to carry out all aspects of the revegetation monitoring program. The
purpose of having the project designer carry out long-term monitoring is to assure adequate
quality control on the project. The City may at their discretion have the monitoring report
I produced by the revegetation monitor reviewed by their on call biological consultant
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I 310401000 - 4-1
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4.2.3 Revegetation Designer
1 Overall supervisioi of both the installation and maintenance contractors will be the
responsibility of the revegetation designer. He will utilize the landscape architect for
technical review of the irrigation installation. During the design and installation phases the
revegetation designer will be directly under contract with the owner to assure proper
completion of contract document and proper installation procedures are followed.,At the
completion of: the installation, the rèvegetation designer will be contracted by the City to
carry out the 5-year monitoring program This contract will be indirectly paid for by the
owner under a separate agreement with the City
The revegetation designer will provide these contractors with a written checklist of tasks
to be performed after each of his monitoring visits to the site. If the revegetation designer's
recommendations call for work beyond the scope of the contractor's contract, the contractor
will be paid additional fees for this work once authorized by the owner.
4.2.4 Installation Contractor
The installation contractor will have responsibility for the installation of all mitigation
landscape plans and the maintenance of all revegetation areas for 120 days after installation
or until final certification is received from the revegetation designer certifying completion of
all required installation and maintenance contract tasks including, but not limited to, dead.
plant replacement, proper staking, weed clearance, and irrigation system maintenance
4.2.5 Maintenance Contractor
After 120 days, a maintenance contractor will be hired by the owner for the remainder of
the 5-year monitoring period. The maintenance contract will be let only on a yearly basis
and renewed based upon the recommendations of the revegetation designer. At the
discretion of the revegetation designer, the maintenance contractor may be changed if
proper maintenance is not performed. mc maintenance contractor will be responsible for
the maintenance program requirements once the installation contractor's work has been
certified as completed At the completion of each maintenance contract, the contractor will
be responsible for having completed all requests for work specified by the revegetation
designer before receiving final payment.
310401000 , 4-2
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I 4.3 CONTRACTOR EDUCATION
The revegetation designer will meet with all contractors prior to the beginning of their
contract to ensure that they understand thç maintenance provisions of the mitigation plan as
well as the recommendations for current maintenance procedures. .
44 CONTRACTOR GUARANTEES
The contractors will, be responsible for the replacement. of all plant materials considered
I dead or -diseased by the revegetation designer at the specified replacement dates defmed in
the success standards (Section 6.0). . .. .
I '.. 4.5 IRRIGATION SYSTEM MAINTENANCE
I . 4.5.1 System Repair
I The installation be responsible for the regular maintenance and maintenance contractors will
and repair of all elements of the irrigation system. The installation contractor will make
I general system checks every three days for the first month after installation to assure heads
are operating properly and coverage of hydroseeded areas 'is adequate. Thereafter,
1
contractors will check system operation at least once a month, except during periods when
the system is not in operation due to the recommendation of the revegetation designer.
4.5.2 System Cycle Documentation .
Contractors designer length will provide the revegetation with the cycle start times and the
of each cycle for all valves in the revegetation areas. These times will be changed as
1 . recommended' by the revegetation designer. When changes are made, the contractor will
provide the revegetation designer with written confirmation of the date and time at which
I the change was made.
'0 45•3 System Removal
I
. The surface components of irrigation systems in the revegetation areas are to be removed
once the landscape plantings have become 'established. The revegetation designer will,
decide how and when irrigation will be phased out. At the completion of the monitoring
310401000 ' 4-3
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period, all irrigation components which are above grade will be removed by the contractor.
from the revegetation areas and all valves permanently disconnected.
I
46 WEEDING
I Weed removal will require constant diligence by the contractor. The crucial period for
I - weed control will be the first two years of project establishment. An 18-inch weed free
band will be maintained around all container plantings for the first two years after planting
I Throughout the rest Of the project, weed species to be removed and the ,methods to be used.
will be specified by the revegetation designer. In general, weed removal will be by hand or
hoe(no weed whips or herbicides will be permitted.) Because of the critical nature of weed
I control at the beginning of the project, the contractor will be held liable for rehydroseeding
if weeds are not removed on a timely basis, thus preventing the establishment of
I hydroseeded species A timely basis will be within one week of wntten recommendations
by the revegetation designer or as specified in this document. During the first 120 days,
I weeds will be removed at least every two weeks After 120 days, weed removal will take
place at least once a month during the first year, once every four months. for years 3and 4,
I
and twice a year during year 5. More frequent monitoring 'will be performed as necessary
or as recommended by the revegetation designer to keep weeds at manageable levels.
I Special attention will be given by the cohtractor to the removal of invasive exotic weed
species from the revegetation site and within all other wetlands onsiie. These species
I include, but are not limited to, giant cane (Arundo donax), .tamarisk. (Tamarix .spp.),
pampas grass (Cortaderia selloana), castor bean (Ricinus communis), and wild tobacco
I (Nicoriana glauca). Repeat herbicide applications may be necessary on large plants. All
small plants are to be removed with their roots if possible before herbicide use is attempted
I All herbicide use at the project will be carried out under the supervision of the revegetation
designer and the recommendations of ahcensed pest control adviser. /
I 47 STAKING AND CAGING
'I.
I Staking of trees will be avoided, and any stakes used will be removed as soon as 'a tree can
support itself adequately. It is expected that same trees will require staking during the first
I 2 years of the project Staking will only be done if recommended by the revegetation
designer. All stakes will be removed before the completion of the 5-year monitoring period
I 310401000 4-4.
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or earlier, as recommended by the revegetation designer. All stakes taken off trees will be
removed from the revegetation areas by the contractor and disposed of legally.
Caging of trees to protect trees from predator damage is not planned for initial installation
I If this need becomes evident, the revegetation designer will recommend that such caging
take placeand the contractor will install the caging according to the specifications provided
I by the revegetation designer. The costs of this caging will be borne by the owner.
48 DEAD PLANT REPLACEMENT
Dead and diseased plants will be fgg4 in the field by the revegetation designer and list
P
provided to the maintenance contractor for replacement Dead and diseased plants will be
replaced at 4, 8, and 12 months during the first year after installation. If plants fail to meet
performance milestones at the end of any given year, plant replacement may be one of the.
remedial measures recommended by the revegetation designer. The cost of replacement
plants will ultimately be born by the owner, although he may assign some or all of this
responsibility to his contractor or other responsible party.. All plants will be replaced in.
p
kind unless otherwise specified by the revegetation designer
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TRASH AND DEBRIS REMOVAL
P
49
'removed All human created trash and debris will be by the contractor from the revegetation
I 'areas at least once every three months throughout the 5-year maintenance period. Care will
be taken that these trash removal activities minimize or avoid impacts to plantings in the
P
. revegetation or wetland areas. All dead limbs and. tree fall will be left in the revegetation
areas. Weed debris will be removed from the project area and disposed of outside the I
I
npanan open space and buffer areas of the development.
4.10 MOTORIZED VEHICLE ACCESS .
I
No service vehicles will be allowed in the revegetation areas at any time. Maintenance
access to the revegetation site will be limited to the minimum necessary for weed and trash
removal. All vehicles will be parked outside the riparian open space and buffer zone areas
of the project at all times No power tool fluids will be changed or added while they are in
the riparian open space or mitigation areas
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310401000 4-5
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The contractor will immediately notify the revegetation designer if any unauthorized
persons, vehicles, or large domestic animals enter the revegetation area.
4.11.PEST CONTROL
I
Insects and diseases will be monitored Biological control will be used whenever possible
I Plants that are severely diseased will be removed and replaced to prevent the spread of
disease and insects Pesticides will be largely avoided unless recommended for special ' problems by the project revegetation designer/horticulturist Rodent control, if necessary,
will be restricted to trapping or anti-coagulants with no secondary poisoning effect. Any
I control
pest control measures which require pesticide use will be recommended by .a. licensed pest
advisor with review and approval by the project revegetation designer.
I 4.12 FERTILIZATION
P For the first two years after planting, all oak, poplar, and sycamore container plantings will
receive one application of Osmocote 18-6-12 in January Recommended rates will be
.applied. The fertilizer will be dug at least 1 inch into the soil within the drip lines of the
p plants. No fertilization will be used after the second year of project. installation unless
I
recommended by the revegetation designer.
GREASE TRAP CLEANING
I
4.13
Either the contractor or other firm designated by the owner shall be responsible for cleamng
R out site grease traps at a minimum of twice every year in early October and March or more
often if required by the revegetation designer. Traps will be cleaned by pumping and
I
removal of trapped material by flushing of the system All removed sediments will be
disposed of offsite
P 4.14 CLEANING OF WATER RUNOFF TREATMENT BASINS
Water runoff treatment basins shall be maintained through the removal of no more than half
of their vegetative cover andi sediments biennially. Work shall be carried out in March
P following the rainy season and prior to the initiation of spring riparian bird nesting
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SECTION 5
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5-YEAR MONITORING PROGRAM
5.1 TIME FRAME AND PURPOSE
I The first purpose of the monitoring program will be to ensure that proper installation,
I maintenance, and establishment procedures, as outlined in the previous section, are
followed. The second purpose of the monitoring program will be to define performance
I standards by which to evaluate project progress The third purpose of the monitoring
program will be to recommend remedial measures, if the project does not meet the
performance standards, which will bring it back into conformance. Horticultural
monitoring will be the primary method for evaluating achievement of the first purpose; a.
combination of horticultural and botanical monitoring will be used to evaluate achievement
of the second goal The revegetation designer will recommend remedial measures
The monitoringi program twill beginbefore construction commences with a preconstruction
education session between the contractors involved in. project construction and the project
-k revegetation designer. Monitoring will continue for '5 years after completion of installation I or until the vroiect is given final approval by the yand the ACOE and CDFG
1 52 HORTICULTURAL MONITORING
' The revegetation designer/native plant horticulturist with the qualifications outlined in
- Section 1.1 will direct the nroiect's horticultural monitoring nroram. Plantings will be
inspected by the revegetation designer on a bi-weekly basis during installation and at least
once .eve1y.. ,3 eeks durinj the fi arerlantig. T!after, the revegetation
designer will visit the project a minimum-of six times a year. However, monitoring visits
I will be made as often as necessary to ensure project progress and proper maintenance
A written memorandum will be prepared after each 1.c.oRstru.cilou. sfleisitJng
prqblDms remedial measures. These memoranda will be sent to the
1' contractor and owner for implementation. These memoranda will focus on any and all
problems concerning project horticulture including weeding, irrigation scheduling, trash
I removal, pruning, pest control, etc. The revegetation designer will be responsible for all
required dead and diseased plant counts and the approval of any substitutions as outlined in
P
Section 6 The 'revegetation designer will be responsible for recommending all remedial
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measures implemented and will set irrigation scheduling and decide when to phase Out
irrigation..
53 BOTANICAL MONITORING
A biologist having the following qualifications will supervise all botanical monitoring: a
broad background in vegetation sampling, at least 2 years of local experience in
identifying/sampling native vegetation; a good knowledge of the ecological relationships of
the vegetative associations .onsite; and a minimum of a Bachelor's degree with a focus in
botany/ecology.
' 7
Botanical monitoring focuses on quantitatively measuring the development of the plantings
and will be conducted concurrently with horticultural monitoring annually for 4 years
beginning with the second year after projectrnstallation Monitoring will be conducted
during the active growing season from April to September. Similar sampling times should
be consistent from year to year. Required reportswill be will _become apajofthe.anjjal
reports for years
Vegetation growth and establishment will be quantitatively, assessed through the use of
- fourteen 30x2-meter belt or line transects (5% of area planted) be ngintejear
of the..proj. Transects will be located so as to effectively sample all revegëtation areas.
Data collected from these belt transects will be used to evaluate project performance relative
to the success standards. Data will be collected on vegetative composition, canopy cover
'- and density. In addition, for the planted nursery tree stock, annual data will be collected on
species height as a means of predicting or measuring achievement of the year 3 to 5 height
goals A statistically valid sample of at least 5% of planted trees will be used for this study.
Volunteer establishment of native wetland species will also be noted and measured as
appropriate At2y, a statistically valid samng..of tree and shrub species planted will
be used to derive standards for the bottom 20 percent of trees in height growth Those
individuals among the bottom 20 percent will be assessed for remedial needs
310401000 5-2
5.4 MONITORING REPORTS
5.4.1 During Construction S
Progress reports 'will be made to the City every two months during the construction
period, beginning with a letter certifying that contractor education has been completed and
that pre-construction site fencing has taken place If construction is delayed for any reason,
monitoring reports will continue to be filed with the City at least once every three months.
5.4.2 After Construction
-E. After construction, monitoring reports will be filed with the City at3,_6,9,12,18,24,36,
48, and 6Omnh Reports will detail project 2roEe s and rcmcdial
recommended and implemented during the report period Reports at the end of each year
will include a summary and analysis of the botanical monitoring data collected and an
evaluation of project progress relative to success standards
Copies of all yearly monitoring reports will be sent to all resource agencies that require
ri
SECTION 6,
SUCCESS STANDARDS AND REMEDIAL MEASURES 1 ,.
6.1 PURPOSE AND BASIS FOR STANDARDS
1
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1 This section defines a set of yearly performance standards for evaluating project progress.
I .
These standards will beusedto decide shen to implement remedial measures to correct
problems in project progress.
62 SCOPE OF REMEDIAL MEASURES
While remedial measures are partially defined, they are also left to the discretion of the
horticultural monitor since it is expected that one approach will .not always be the best or .
I ' most cost effective. Remedial. measures will include some or all of the following:
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additional weeding, fertilization, pest control, replanting, additional irrigation, changes to
irrigation system, and species substitution
6.3 PROJECT SUCCESS STANDARDS AND RECOMMENDED REMEDIAL
I MEASURES
Remedial Measure if
Standards Not Met Standard. . . .
Year
1. 1. 40% groundcover . . . . Reseed/Replant
Substitutions possible
2 Establishment of all species t Reseed/Replant
Substitutions possible
P 3 100% healthy container plantings
Year 2
Replace with same species/size
I .. All trees of acceptable growth rate in height.
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' Smallest 20% of container trees
receive remedial measures
. All shrubs of acceptable 'growth rate .
Smallest 20% of shrubs receive
remedial measures.
3 100% survival of tree plantings2 Replant
80% survival.of shrub plantings2 . .
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4. 50010 total grundcover for all species . . '
,. . .
Additional seed or container
. . combined. . .
plantings as recommended by
I : revegetation designer,
310401000 6-1 1
Remedial Measure if
Standard Standards Not Met
Year 3-S
1 Height standards met for all trees - Replant or receive remedial
measures, suosurunons
- possible
Tree Height Standards' XR5.
Oaks (5 gal.) 1.0 P 1.5 1.75
(treepot) 75 10 15
Poplars (1 gal) 4.9 6.4 3.9
Sycamores (5 gal.) ': 1.5 2.0 25
Willows (1 gal.) 2.0 2.7 ,.. 3.4
Mulefat and sandbar willow (1 gal) 1.2 1.5 1 8
2 90% survival of tree plantings2 Replant
80% survival of shrub plantings2
3.. 60% groundcover by all species in year 3 Additional seed or container
70% groundcover by all species in year 4 . 'plantings as recommended by
80% groundcover by all species in year 5 revegetation designer
1 All-heights given in meters
2 At the discretion of the projectrnonitOr, dead container plantings can be mitigated for by
naturally invading seedlings if such seedlings are within 5 feet of the original plantings and of
similar species or habitat value.
4. Irrigation will gradually be withdrawn from the revegetated areas during years 3
and 4. For the project to be considered successful, plants must survive through one
full dry season without supplemental irrigation. Thus, no matter when the'
monitoring period begins, final project evaluation will not be made until the first
March after irrigation has been discontinued..
'
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64 MODIFICATION OF MONITORING PERIOD
The monitoring period is Specified to be 5 years after completion and approval' of
installation. The City and/or the resource agencies (under the project's 1603 and
404 permits) may terminate monitoring earlier than 5 years if it is recommended by the
revegetation designer/horticultural monitor. Likewise, if, at the end of 5'years. any of the ' (
revegetated areas fails' to meet the year 5 standards, then the monitoring and maintenance'
period may be extended an additional year and a specific set of remedial measures will be
implemented as per direction of the City. Only areas which fail to meet the success
standards will require additional work and remedial measures. This process will continue
until the year '5 standards are met or until the City determines that other mitigating
measures are appropriate.
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TABLE OF CONTENTS
SUMMARY
BIOLOGICAL ASSESSMENT
2
FOR THE 55.5 ACRE UOt1E DEPOT SPECIFIC PLAN AREA METHODS 2
ON THE SOUTHEASTERN CORNER OF EL CAMINO REAL
AND OLIVENIIAIN ROAD LOCATION ......................................................S
ENCINITAS, CALIFORNIA - GENERAL PHYSIOGRAPHY S
BOTANICAL RESOURCES 7
VEGETATION 7
SOLITIIERN MIXED CHAPARRAL ............................7
MEGAN SAGE SCRUB 10
SALT MARSH ........................................II
Prepared or 3 FRESiIWATERJBRACKISII MARSH II
II SOUTHERN WILLOW SCRUB
DISTURBED FIELD 12 Constance A Willens & Associates FLORA 13 4231 Collwood lane
San Diego CA 92I15 ZOOLOGICAL RESOURCES 14 Tel 619/583 2870 GENERAL WILDLIFE HABITAT 14
SOUTIIERH WILLOW SCRUB ...............................14
- - FRESHWATER/BRACKISH MARSH ...........................IS
SALT MARSH ......................................... 16
SOUTHERN MIXED CHAPARRAL .............................. 16
DrEoN SAGE SCRUB 17
- DISTURBED FIElDS .....................................18
Prepared by A.1.IPHJBIANS
REVTILE.S ...............................................19
18
Pacific Southwest Biological Services. Inc. BIRDS ...............................................20.
MAItRIAU ...............................................22 Post Office Boa 985
Naciunal City CA 91951-0985 SENSITIVE BIOLOGICAL RESOURCES ..............................22 Tel 619/477-5333
Fax 619/477-1215 SEITIVE PLANTS DETECTED ON-SITE ...........................22 NS
DEL MAR MANZANITA ...................- .............23
-
COAST WHITE-LILAC ...................................23 9 November 1989 DEL MAR SAND ASTER ................................24 (Updated 23 September 1992) COAST SCRUB OAK. ......................................25
SENSITIVE PLANTS KNOWN FROM THE REGION BUT NOT FOUND ON-SITE . . . .. 26
4/ EHCD41TASBACCHAR 28
Keith W.-Merkel, Vice President SEASIDE CALANDRIF4IA ................................29
SEA DAHLIA ........................................30
-
. ORCUTr S SPINEFI OWER 30
- WESTERN DICHONDRA .................................31
ASHY SPIKE-MOSS ..................................... 33
C - -
O9rW92 $
'-' ' T - - r - '- -
PSSS 184$ PSBS IRIS
SENSITIVE AP4uIAu 33 FIGURES TAULES, AND APPENDICES
CoRoNADo SKINK....................................34 S
SHARP-SHINNED HAWK .................................34 FIGURE I. PROJECT VICINITY pp ...............................6
RED-SHOULDERED H"K .................................35 FIGURE 2. VEGETATION AND SENSITIVE RESoURCES .....................8
DOWNY WOODPECKER ...................................35
CALIFORNIA GNATCATCIIER ...............................36 TABLE- 1. SUMMARY OF PERSONNEL, DATES, TIMES AND FIELD CONDITIONS .....4
LOGGERHEAD SHRIKE .......................................37 TABLE 2. SUMMARY OF IMPACTS TO EXISTING VEGETATION BY PLANNING AREA .' 48
SOUTHWESTERN WIILOW'FLYCATCHER ....................... 37
YELLOW.BRçASTED CHAT ................................38 APPENDIX I. FLORAL CHECKLIST ...................................64
NORTHWESTERN SAN DIEGO POCKET MOUSE ..................39 APPENDIX 2. ANIMALS OBSERVED OR DETECTED .........................69
SENSITIVE AND.IALs POTENTLLLY OCCURRING ON-SITE .................39' APPENDIX 3. PLANT SENSITIVITY GUIDELINES .............................73
SAN DIEGO HORNED lIZARD .................................40 APPENDIX 4. ANIMAL SENSITIVITY LISTINGS ............................74
ORANGETHROAT WIIIPTAIL ................................40
COASTAL WHIFTAIL .....................................41
CALIFORNIA LEGI.ESS'LIZARD .............................41
SAN DIEGO RrNccK SNIcE ..............................42
TWO-STRIPED GARTELSLg ........ .....................42
'BLACK-SHOULDERED KITE ....................................42 ' ' COOPERS HAWK ......................................43
CALIFORNIA HORNED I ARK -: .................................43
LEAST BELL'S VIREO .......... .... ...... ....... ............. YELLOW WARBLER .............................................44
PACIFIC POCKET Moi'sk .....................................44
SAN DIEGO DESERT WOODRAT ..............................45
EXPECTED BIOLOGICAL IMPACTS AND RECOMMENDATIONS ...........45
PLANNING AREA I HOME DEPOT SITE ..........................47 - BIOLOGICAL IMPACTS ......................................47 '
MITIGATION MEASURES ...................................50
RESIDUAL IMPACTS ...................................SI -
PLANNINo AREA 2 - BLUFF-TOP RESIDENTIAL DEVELOPMENT ..............52 '
BIOLOGICAL IMPACTS ..................................52 '
MITIGATION MEASURES .................................52 '
RESIDUAL IMPACTS ....................................55'
PLANNING AREA 3 PIERCE PROPERTY COMMERCJAIJLIGHT INDUSTRIAL ......55
BIOLOGICAL IMPACTS ...................................55
MITIGATION MEASURES ................................56 '
RESIDUAL IMPACTS ......................................56
PLANNING AREA 4 - COWAN PROPERTY CoIERCIAIJLIGlfr INDUSTRIAL ......57 *
BIOLOGICAL IMPACTS ....................................57
MITIGATION MEASURES ...............................58
RESIDUAL IMPACT .....................................58
'
ADDITIONAL AGENCY PERMITtING. .............................. 59 5
ALTERNATIVE PROJECT .'59 ' S
LITERATURE CITED .........................................61 - - -
c_-S -
,
5' f\ S S - ' S ,
--
..-
PSBS 084 PSBS IdIS
BIOLOGICAL ASSLSS1l ENT. a level of non significance under CEQA In addition the project would tiult in
the loss of approximately 200-330 Coast White-Lilac and a small population of FOR THE 55.5 ACRE hOME DEI'OT SPECIFIC PLAN AREA i):I Mat Mas weflassubstant as Scrub The these ON ilIE SOUTHEAStERN CORNER O} EL CAIIHNO REAL sensitive plants is of minor significance Associated with the development of
AND OLIVENI lAIN ROAD . Planning Area 2 would be the anticipated loss of one pair of California
ENCLN1TASI CALIFORNIA Gnatcatchers The viability of on site mitigation for this species is considered
low and off site habitat preservation is recommended
Pact/ic Sui,shiezi D,o1oga! Sen:cez Inc
23 September 1992 Further the project would result in the elimination of approximately 7 2 acres of
native Southern Mixed Chaparral vegetation. The impacts of these losses are
mitigable under the proposed project through designation of biological open space
StThI11ARY over at least 50 percent of the Site 21.4 acres of chaparral and implementation
of measures to enhance the presence of the manzaniia and white-lilac within the
A biological investigation 01 the 555 acre Home Depot Specific Plan Area on the preserved open space as well as prevent degradation of this open space by
invasive exotic plantings from above or human intrusion into the area. southeastern corner of El Camino Real and Olivenhain Road in Encinitas revealed
a good quality Southern Willow Scrub/ Woodland bounded by non tidal salt marsh
and highly disturbed wetlands in the northern portion of the site Alluvial upland
terrain through the central portion of the site has been historically farmed and is INTRODUCTION
now covered in a flonstically limited weedy vegetation The southern portion
of the site consists of sandstone hills with a Southern Mixed Chaparral vegetation A biological survey of the Home Depot Specific Plan Area (SPA) was performed by
that includes substantial Coast White Lilac and scattered Del Max Manzanita A
resident pair of California Gnatcatchers occurs within the scrublands of the Pacific Southwest Biological Scrviccs Inc (PSBS) at the request of Constance A Willens and
southern portion of the Specific Plan Area
Associates of San Diego The purpose of the survey was to identify sensitive biological
The proposed project evaluated is a Specific Plan for the 55.5 acre area divided -
into four separate Planning Areas The Plan would allow for construction of a resources and constraints and to assess impacts of the proposed Specific Plan on these existing
home improvement center within Planning Area I a lw lying area straddling the
floodplain of Encinitax Creel I tanning Area 2 is lo.aied on coastal sedimentary resources
bluffs to the south and is pi .uscd for single faintly residential uses Projects
consistent with the proposed Sp..cific Plan in both Planning Areas I and 2 have -' -
been developed to a project level of detail and are proposed at this time. While
no specific projects have been proposed for the remainder of the Specific Plan METHODS
Pluming Areas the Plan assumes developability of two additional areas located
easi of Planning Areas I and 2 and designated Planning Area 3 and Planning The bolantcal portion of the survey was conducted by Craig H Reiser on 30 September
. Area 4. These areas are presumed to have development potential of 2.5 and 15 . -
acres respectively. Light industrial zoning of these sites is proposed under the 1989 The on foot survey covered all slope aspects soil types and drainages Particular
- Plan, with the remainder of these parcels, totalling 14.2 acres, being highly .
constrained by slope wetlands and floodway resources as well as existing utility attention was given to a directed search for the Encinitas Bacchazss and Orcutt s Spineflower.
easements
The proposed Specific Plan, including the development of Planning Areas I and 2 Vegetation and sensitive plant locations were delineated on a V. 100' topographic map.
.
as proposed under the Plan guidelines would result in losses of 2.9 acres of A comprehensive wetlands determination was conducted by Keith W Merkel (chief
(allow field wetlands which support weedy herbaceous vegetation as a result of -
their long history of agricultural use Due to the wetland character of this field
habttat, the tremendous decline in wetlands over the past decades, and the general ecologist) and Adam lColt.z (field assistant) In the specific instance of the Home Depot Specific
loss of restoration potential this loss would be considered significant Plan site this boundary encompasses all areas of Corps jurisdiction as well as all areas of
On-site mitigation, as proposed in the form of wetland creation, wetland
- Cali fomiaDepartment of Fish and Game regulatory jurisdiction pursuant to Section 1600 a seq.
enhancement, and wetland preservation as well as urban runoff control, is
considered to provide suitable mitigation to reduce impacts of wetland losses to of the Fish and Game Code Wetlands on the site were mapped on a V 100 scale
ow-was i 09flJ192 2
10
31
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PSBS #845
TARLR 1.. STIMMAnY OF PERSONNEL. DATES. TIMES Am FIELD CONDITIONS
PERsoN?EI.
/
DATE
1
TIME I
(HOURS) COMMONS
Keith W. Merkel 12 October 1989 1700-1900 Overcast skies, 69° F. at 1710 bra., no winds.
Keith W. Merkel 26 October 1989 0900-1140 Clear skies, 71 F. at 0900 his., no wind.
Eric R. Lichtwardt 3 November 1989 1100-1500 Clear skies, 70. F. at 1100 bra., winds
2-5 mph.
Keith W. Merkel 14 March 1991 1500-1600 No weather data collected
Keith W. Merkel 1 June 1991 1115-1130 Overcast skies, 70° F. at 1115 his., winds
NW at 0-5 mph
Keith W. Merkel 7 June 1991 1000-1030 Clear skies, 78° F. at 1030 his., winds
0-3 mph.
Adam Koltz 24 August 1991 0900-1000 Clearing skies, 74° F. at 0930 his., winds
were light from the west.
Adam Koltz 25 August 1991 0700.0750 Overcast skies, 65° F. at 0700 his., winds
were calm..
Adam Koltz 29 September 1991 0715-0845 Clear skies, 68° F. at 0715 his., winds were
light and variable.
Eric R. Lichtwardt 2 October 1991 0700-0900 Hazy, and sunny, 80-85° F. at 0900 bra.
Adam Koltz 18 January 1992 0730-0915 Morning overcast, approximate 600 F. at
David A. Mayer 0730 his, no winds.
David A. Mayer 23 April 1992 0730-1100 Morning overcast becoming mostly sunny,
65° F. at 0730, winds negligible.
David A. Mayer 30 April 1992 0800-1100 Sunny, 67° F. at 0930, winds 2-8 mph.
David A. Mayer 8 May 1992 0730-1030 Overcast, 65720 F., winds negligible.
Geoffrey L. Rogers 26 May 1992 0700-1000 100% clouds, 58-63° F., winds 3-8 mph.
Claude G. Edwards 3 June 1992 0630-0930 overcast, approximately 66° F., light breezes.
Claude G. Edwards 10 June 1992 0630-0750 overcast and misting, 66° F., light breeze.
Claude G. Edwards 17 June 1992 0700-0900 clear, 62-68° F., winds negligible.
Claude G. Edwards 24 June 1992 1100-1245 Hazy sunshine with scattered clouds, humid,
76° F., light breezes.
Claude C. Edwards 1 July 1992 0745-0915 Mostly cloudy skies, 74° F., light to moderate
breezes.
Claude G. Edwards 8 July 1992 0800-0915 Overcast, 76° F., high humidity, light breezes.
John E. Harris 09 July 1992 1930-2030 100% clouds, 70-75° IF., wind 0-2 mph.
John E. Hams 10 July 1992 0630-0730 100% clouds, 70° F., no winds.
John E. Harris 13 July 1992 1915-2000 Partly cloudy skies, 75*F., no winds.
John E. Harris 14iuly 1992 0645-0745 100% clouds, 70 F., no winds.
I
09123/92 4
(
PSBS #845
N FIGURE 1. PROJECT VICINITY MAP
USGS 7.5' Encinitas and Rancho Santa Fe Quadrangles
1-2000.
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I SENSITIVE RESOURCES
-
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1 California Gnatcatcher
Wctland Boundary
I NGURE 2. VEGETATION AND SENSITIVE RESOURCES
I.. _
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arborescent growth not found in the adjacent saline marshlands Along the drier fringes of the Telegraph Weed Horse Weed (Conyus canaderisis) and Chrysanthemum (Chrysanshemwn
woodland Mule fat (8acch0ns sul:c(olia) and Desert Elderberry (Swnbucus mezicana) are coronai-awn) A very similar vegetative condition is found near the base of the north facing
common canopy elements. Riparian woodlands are highly interspersed with salt marsh and slope of mixed chaparral. Here there is a strong representation of Coyote Bush. and although
freshwater/brackish marsh as cil as disturbed uplands Elements from these fringing best delineated within the category of Disturbed Field this area undoubtedly holds some utility
communities predominate as understory within the woodland with such plants as Soft-flag to wildlife occurring in adjacent scrub or chaparral.
Cattail California Bulrush Prairie Bulrush and Salt marsh Fleabane dominating more mesic Bordering the woodland to the south agricultural use has been more recent and evidence
areas Coyote Bush (8acchans prlulanz asp cwxranXusnea) Telegraph Weed (ileserotheca of furrowing is still present Vegetation in this area is fairly open and dominated by primary
Srandf/lora) and Tree Tobacco (N,couana glouca) occur in drier portions of the woodland successional species including Western Ragweed Russian thistle (Salsola au.uralis) Telegraph
Also of note Is the highly, invasive Pampas Grass (ConaJeria dioica) which has gained a Weed and Chrysanthemum Of noteworthy occurrence In these areas was the abundance of
foothold in the riparian woodland Marsh Evening Primrose (Oenothera clara) scattered seedling Arroyo Willows. and Mule fat
Away from the main channel flowline a second stand of Arroyo Willow is found at the Much of the fallow fields are dominated by wetland associated weedy plants and emergent
base of a small alluvial (an extending north from a side drainage in the southern sandstone natives Wetland delineation soils test pits confirmed the presence of both hydnc soils and
bluffs The base of this fan sustains a high groundwater table which appears to be a tributary wetland hydrology which was suggested by the vegetation..Due to the short recovery history
to the main flow of the creek bed This smaller woodland is almost devoid of understory plants of this Site only subtle vegetation difference and less subtle sub-surface soil and hydrology
Disniaaai FifED (20.3 acres) disparity separate uplands from wetlands.,Given time the vegetation distinctions would become
Three separate types of disturbed fields occur on the specific plan area All are much more clearly defined
dominated by weedy vegetation resulting from past disturbance. The chronology of disturbance Finally, on the southern ndgeliric of the site, recent clearing has denuded all vegetation
and prevailing cnvuonmenial conditions have resulted in the differentiation of these fields from two isolated areas These areas are expected to begin an accumulation of upland weeds
The disturbed fields within the lower alluvial plain on the site have historically been following the onset of winter rains Species which may be the first to recolonize this area
utilized for agricultural purposes To the north of the riparian areas on the creek along include brome grasses (Dromus spp) filarecs (Ervdiwn spp) Scarlet Pimpemet (.4n4841lLs
Olivenhain Road the area has long been fallow and has returned to a great degree to an arvertrls) and Fascicled Tarweed
alluvial (ass shnibland condition Common elements in this area are secondary disturbance FLORA
a.aociates and include Coyote Bush Coast Goldenbush (liocoma senaa) Australian Salibush One hundred and one species of plants were located during the present survey, of which
(Atriplex semibaccaza) and Saw toothed Goldenbush (Flu ardla squarrosa) In addition the area thirty are invasive non-native elements (Appendix I) An additional Ii percent of the site's
supports scattered, but less abundant, primary successional species Including Western Ragweed, flora consists of ephemeral spring annuals which had decomposed by the late October survey
MUNI 12 - 13 - -
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PSUS ISIS
DisnJaeeD FIELDS
Much of the central portion of the site is dominated by recently (allowed fields which
support an abundance of large, seeded weeds and few natives. The grassier areas are utilized
by habitat generalists such as the Mourning Dove (Zenaida macroura), White-crowned Sparrow
(Zoro:nchia leucophrys), Lesser Goldfinch (Carduelis psaliria), and House Finch (Capodacus
me.ucanus). as well as ubiquitous mammals including the California Ground Squirrel
(Spermophilus beecheyl) and Boitas Pocket Gopher (Thumomys honor). The stands of Coyote
Bush adjacent to the chaparral were used by the above-mentioned species as well as those more
characteristic of the chaparral, namely the California Quail. BewicLs Wren, Wrentit, Rufous-
sided Towhee, and most importantly, the California Gnaicatcher. -
Included within the Disturbed Field category is a small grove of eucalyptus which
provides a unique environment for perching raptors; however, the on-site trees may not yet be
mature enough to support maptor nesting. Eucalyptus often attract obligate and facultative nectar-
eating buds when In bloom. These include various hummlngbirds, orioles, tanagers, and
warblers.
AMPHIBIANS
Pacific Chonis Frogs (Pseudacns regilla) were heard calling from the dense riparian
vegetation along the creek. These small frogs Are among the most widespread and common
amphibians in the western United States. The introduced Bullfrog (Rana cwesbelana) Is also
present on-site but apparently in very low numbers. California Toads (Bujb boreas halophilu.$)
also are almost certainly present. Among the oaks in the chaparral, the Garden Slender
Salamander (&urachoseps major) is expected to be present. These small salamanders become
active on the surface during the winter wet season.
Psas 5345
REPTILES
Lizards observed on the site were the Western Fence Lizard (Sceloporus xcidesstalLs),
Side-bloichcd lizard (Ilia s:aniburlana), and Coronado Slink (EunwCes ikilsordarsus
IiuerpanesaIis). These lizards are common In many habitats on the coastal slope in Southern
California. The slink, however. is quite cryptic and more commonly encountered beneath moist
debris following rains. it was recently listed as Category 2 by the U.S. Fish & Wildlife Service
(USFWS). Southern Alligator Lizards (Elgaria muhicatinwa) are probably present In thickeU
and other well-vegetated areas. The California Legless Lizard (Anniella nlgra) in a fossorial
species which inhabits areas of loose soil in scrublands and along beaches. These secretive
lizards may also be present on the site but are seldom observed.
Because the site is bordered on two sides by heavily, traveled roads and is further
bounded by residential development, large snakes are not expected to be common on the site.
This may be compounded by the, history of human occupation and agricultural activities, as
snakes are often killed when encountered by humans. The Common Kingsnakc (LampropeWs
genius) was the only observed snake species but other regionally common species may be
present. These include the Gopher Snake (Pituophis cwen(frr), Coachwhip (MasticophLs
flageliwn). California Striped Racer (Mas:icophls IweraILO, and Southern Pacific Rattlesnake
(Crotalus viridu hellert). The Two-striped Garter Snake (Thamnophis hainmondt) was formerly
-a common snake of wetlands along the coast but is infrequently seen in these habitats today.
The general degradation of these wetlands seems to be the major factor in the decline of this
garter snake which is endemic to California and Baja California, Mexico. It is given moderate
potential to be present.
II Oii'Wfl is
- - .- . -- -
PSBS IS-IS
BIRDS -
Sixty species of birds have been observed on the site during the course of the current
investigations or in the recent past (Appendix 2). This high number is a reflection of the
extended period of study as well as the diversity and quality of the on-site habitats, particularly
the riparian habitats.
Wintering species noted on the property included the Sharp-shinned Hawk (Accipiter
suiwus), Yellow-rumped Warbler, (Dendrolca cownala), Lincoln's Sparrow (Melospiza
Iincolnis), Golden-crowned Sparrow (Zono:nchia aincapilla), and White-crowned Sparrow. The
Ruby-crowned Kinglet (Regulus caleridula) and Hermit Thrush (Ca,honss gwloJus) are also
expected to occur on-site during the winter season. - -
Many of the detected birds are regularly found in a variety of habitat types and/or occur
in rural residential areas. Examples of these more ubiquitous species are the Mourning Dove,
Anna's Hummingbird (Calypie anna), Costa's Hummingbird •(Catyp:e costae), Northern
Mockingbird (Mimw pofyglolios), Scrub Jay, Bushtit, Wrentit, House Finch, and Lesser
Goldfinch.
The scnsblands and chaparral supported a diverse assemblage of avifauna fairly typical
of the region. Scrubland associated birds observed on-site were the California Quail. Greater
Roadrunner (Geococcyx ca!jfomianus), California Gnatcatcher, and Bewick's Wren, along with
many of the more ubiquitous species mentioned above.
The open fields tend to support comparatively fewer species of birds; however, several
are more characteristic of such conditions. Among these are the Western Meadowlark (Snarnello
neglecta) and Loggerhead Shrike (Lan/us ludoticianur). This latter species has received recent -
LJSFWS Category 2 listing due to widespread regional population declines. Another recent
Category 2 listing which may occur is the California Horned Lark (Eremophila alpesirts acda).
C963d 20
AW : _ -
- PSB$ 014$
Riparian areas or woodland and mixed marshlands attract a wide variety of birds to the
property. Great Egrets, Great Blue Herons, and a Green-backed Heron were seen in the
freshwater marsh foraging for Mosquicofish. frogs, or crayfish. A Belted Kingfisher (Ce,yk
akyon) flew over the site but probably finds more productive fishing grounds at Bauquitos
Lagoon. The more numerous avian species were the Common Ycllowthroat, Song Sparrow,
Red-winged Blackbird, and House Finch. Areas of larger or more dense willows were favored
by the Nuttall's Woodpecker, Northern Flicker (Colajnes aurww), Pacific-slope Flycatcher
(Empidonax djfflcllis), Black-headed Grosbeak, and House Wren. The Downy Woodpecker
(P/co/des pubescent) was seen on the site during October 1991 as well as the spring 1992 field
work, indicating regular occurrence in the area although It is very uncommon in San Diego
County south of the San Luis Rey River.
Focused riparian studies In the spring of 1992 did not detect the Least Bell, Vireo or
Southwestern Willow Flycatcher on the site. This latter species was observed In June 1991
(Mooney 1992) but no breeding activity was observed and the observer has indicated the
individual was a migrant (Claude Edwards personal communication 1992) The Least Bell's
Vireo has not been seen In the immediate vicinity for approximately 10 years (Mooney 1992),
although there is good quality habitat both on and off-site. A single Yellow-breasted Chat was
observed in mid-June 1992 but Its on-site breeding activity is unlikely based upon the lack of
detection prior or subsequent to this sighting. The willow woodland is suitable for chats, and
the observation nonetheless speaks highly for the habitat quality. Yellow-breasted Chats are
often used as indicators of habitat quality potentially suitable for the less common Least Bell's
Vireo.
Three raptor species were observed during the study: the Red-shouldered Hawk (DuJe0
lineaws), Red-tailed Hawk (Buco jamokensis), and American Kestrel (Pa/co sparverluO, none
of which appear to be nesting on-site at this time. The Red:sttouldcred Hawk utilizes riparian,
09JUl93 21
Sm
- - -- AM : . I. •.im - - --
PSBS IS-li
oak, and non-native woodlands and is a likely resident of the off-site higher quality willow
riparian woodland to the northwcI. As such, it could regularly forage in the open grassland or
- scrublands of the vicinity, lnãluding the subject property. The Red-tailed Hawk and American
- Kestrel are the two most common raptors in the county and are regularly encountered in rural
and undeveloped lands.
MAMMALS ••' .
Twelve species of mammals have been detected on the property (Appendix 2). Six of
these are rodents which were either freely observed, trapped, or identified through characteristic
indirect sign. One of these is the San Diego Pocket Mouse (Choetodipusfalla.xfallax), which
is a recent addition to USFWS Category 2 listing. Two species of rabbit are also present: the
Desert Cottontail (Sylvilagui audubonli) and the Brush Rabbit (Sylvilagu.s bachmas'ti). These -
above species present an excellent prey base for larger mammalian predators and raptorial buds.
Coyote (Can!, lalraiu) scat was noted along several of the trails. The Gray Fox.
Raccoon (Procyon loro,), and Virginia Opossum (D!ddphü virgln!aria) were all detected via
their tracks or scass along the creek. Another mammal which persists well .in the lace of
urbanization is the Striped Skunk (Alephills mephitis), which is also expected to be present on
the site and has been noted across El Camino Real (K. Merkel, personal observation).
SENSITIVE BIOLOGICAL RESOURCES -
SENSITIVE PLANTS DErEcrio ON-SITE
Three sensitive plants were found on-site: Del Mar Manzanita, Coast White-Lilac and -
Coastal Scrub Oak. Listing status abbreviations are explained in Appendix 3. A fourth species,
-
the Del Mar Sand Aster, Is reputedly present, but numerous flowering specimens examined from
the site are all clearly identifiable as the common, but similar, Cudweed Aster.
OSI7J'92 22 - -
PSBS IS-IS
DEL MAR hlrrar-nTa (4c:osraphylos glonduloso up. crau(Iolia)
LIsUNC: CNPS List lB R.E-l) Code 3-3-2
StatelFed. Status - /C2 ERICACEAE
(California Native Plant Society, Smith and Berg 1986)
Dis-TRIBLmON: Coastal San Diego County
hABITAT: Del Mar Manzanila occurs in chaparral with Chamise and oftentimes
- Ceono:hu.s vernicosus. Typically, the substrate is eroding sandstone.
Soils include Terrace Escarpments and Loamy alluvial land of the
Huerhuero complex.
iCNon1 Snu: This manzanita grows in both northern and southern extensions of the
- Torrey Pines State Preserve. It Is occasional in Lomas Santa Fe such as
in San Dieguito County Park, in Encinitas near Whisper Wind Lane, as
well as south of Encinitas Creek and cast of El Camino Real. Reports are
from a canyon drainage on the western slopes of Cannel Mountain, and
- cast of Rancho Santa Fe Road near Avenida La Posts. Additional reports
are for scattered tracts of chaparral in Del Mar and Rancho Santa Fe.
Two unconfirmed reports are for locales well to the north of concentrated
populations at Fire Mountain in Oceanside and eastward near Miramar -
Lake.
-•
STAflJS: This substantial shrub is slowly declining In San Diego County as inftlling -
occurs in residential areas from Torrey Pines and Del Mar north to
Encinitas. Primaty impacts arc due to urban expansion.
This plant is found scattered within the chaparral covered bluffs on the site within
Planning Area 2. Highest densities are found on the northernmost crest of the upland iidgcline.
COAST WuffE.LtLAC (Ceanothus vernscosus) -
LISTING: CUPS List 2 R-E-D Code 1-2-I
State/Fed. Status -- /C2 RHAMNACEAE
DISTRI8tJIION: San Diego County; Baja California, Mexico
HABITAT: Coastal Chaparral intermixed with Chamise and Mission Manzanita is the
preferred habitat for this sizeable shrub. Typically the Coast WhitcLsl C 1. Is a dominant shrub within the vegetation community wncrc it Occurs...
may be particularly vigorous on north-facing slopes, but can accommodate
more xeric aspects. Exchequer rocky silt barns and San Miguel-
Exchequer rocky silt barns are utilized by the.densc populations of this
lilac in-the Mount Whitney area. Terrace Escarpments are the soil type
mapped beneath this shrub at Torrey Pines, while Qavlota fine sand boansa
arc found at the Point Loma populations.
KHO%%?4 SnES: Sizeable populations are found on the Point Loma Subase, at Carmel
Mountain, on north-facing slopes near the Miramar Landfill In Sari
Clemente Canyon, and on the north-facing slopes of Escondido Creek 1
mile east of Lake Val Sereno. Another substantial population grows at
Torrey Pines. A small population is still extant on an urban hillside In
- -
23 • • -
_ • -- ' - - ON Im NO
PSBS 5113
East San Diego, indicating that sizeable tracts of urban lands may once
have been cloaked in Coast White-Lilac. This shrub is the dominant plant
In rugged terrain south of Mount Whitney. Here and surrounding the
- nearby Questhaven Retreat it occurs in the tens of thousands. It is also
common at the crest of the road to Mount Israel on Rancho Ciclo; as well
as in the hills to the north. Once regionally abundant within the coastal
canyons of the county. Cean.nhuj vernscosus has been substantially
reduced in numbers because of urban sprawl. Other locales where this
shrub is found include near Rossini Drive In Cardiff, north of the terminus
of Swallowtail Road in Encinitas, in La Zanja Canyon. north of
Woodwind Drive in Olivenhain, on Carmel Mountain, and well disuibutcd
in the canyons between the Minmar landfill and the Interstate-SOS.
Numerous other locales between La Jolla and Carlsbad could be identified.
It is locally common in coastal chaparral north of Ensenada. Mexico;
occasional on Punts Bands Peak.
Twenty-seven collections from Baja California are found at the San Diego
Herbarium; south to 28 21 'A' North where collected by Moran (78000
- .SDMNH) on Cedros Island.
STAU Several very vigorous populations of Coast White Lilac are extant it is -
declining locally on the periphery of the coastal ClueS
This plant Is relatively common throughout the southern portion of the SPA in Planning
Areas 2 and 3. Much of this area has burned heavily and scedlinj shrubs are the predominant
representatives of the population. Approximately 250-400 juvenile plants were present in the
Specific Plan area during the 1989 census. Approximately SO specimens would be preserved
In chaparral-dominated open space of Planning Area 3. V V
DEL MAR SAND ASTER (Core:hrogyne filagin(folio vat. Iin(fulio)
V
L55Tv4G: CNPS List lb R-E-I) Code 3-2-3
State/Fed. Status - /C2 ASTERACEAE -
DisrmtmoN; San Diego County
V HAarrA1: Coastal Mixed Chaparral in sandy locales is the preferred habitat of the
Del Mar Sand Aster. This form of the widely ranging Cudweed Aster
V V seems to thrive on partially disturbed sandy soils on the periphery of
Chamisc and 4rcoziaphylos glanduloio up. crass(/olio, indicating that
habitat can be created given the proper geology and soils. Terrace
Escarpments are mapped in La Zanja Canyon and at a number of locales
where this aster grows. V
KiIOWN Snuz This herbaceous perennial is common throughout the Torrey Pines
Preserve. It grows east of Del Mat and in a number-of areas of Encinitas
not yet developed for residential uses. It is localized on time north-facing
slopes of Carmel Valley near Interstate-3 and on Carmel Mountain, at the
09123d52 24 -
PSBS 5143
foot of eroded bluffs north of Woodwind Drive in Olivenhain, near Desert
Rose Way in Encinitas, and is sometimes found farther inland such as at
La Zanja Canyon.
V STaTUS: Del Mar Sand Aster is declining substantially but is still locally common
V in the Del Mar/Enciniias region. Long term prognosis, however, is
questionable owing to extensive habitat reduction." The Del Mar Sand
- Aster has a preference for mildly disturbed soils and will pioneer on
recently cleared chaparral sites with sandstone substrates. Recent
taxonomic review, (e.g., Dr. Meredith Lane, Kansas) has tended to refer
this entity to the very common and wide ranging Cudweed Aster
V (.ss1ng1a filaglnifolia var. filagin (folio) which is found on the Home
, Depot SPA site. Plants with,tomentose involucres occur in diverse locales
and habitats elsewhere in California: a form once referred to variety
las (Jolla, with a similar involucre but more broadly oblong leaves occurs
in the 'Los Angeles to Santa Barbara' area along the coast; a form once
referred to variety sunlit with it lomentose Involucre and ovate leaves
V grows in the San Bernardino and Palomar Mountains. Typical variety
fllagln(folia has a glandular involucre.V In addition, leaf shape. (linear in
the Del Mar Sand Aster) is notoriously variable within the common form
of sand aster. Merging these entities owing to the irregular patterns of
trait distributions may be warranted. It should be noted that in the Del
-, Mar region strong edaphic correlations exist with the form which has
V , V linear leaves and somentose involucres. Additional taxonomic study Is
merited. -
This herbaceous shrub has recently been reported on-site. In the region, the Del Mar
Sand Aster is a disturbance follower. Its appearance would not be unexpected given the
V extensive soil disturbance generated by the illegal alien encampment and the camp's subsequent
removal. It prefers very sandy locales and grows at nearby properties in Encinitas. However.
numerous flowering specimens were examined from all portions of the site; all were clearly
identifiable as the regionally common Cudweed Aster (Core:hrogynefllagln(folla var. edrgwa)
V based on their green, glandular involucres. -If the Del Mar Sand Aster grows on-site, It Is
extremely uncommon.
CoasT ScRuI OAK (Quercus dumona)
LISUJG: CNPS List IS (Proposed) R-E-D Code 3-3-2 (Proposed)
State/Fed. Status -- None FAGACEAE
DISTRIBLrnO?4: San Diego County, Orange County; Baja California, Mexico
liaatrAT: Coastal chaparral with a relatively open canopy cover is the preferred
-
V habitat in flat terrain; on north- facing 'slopes this shrub may grow in dense
stands. Chesterton fine, sandy barns are mapped for the Miramar Naval
09123192 23
V •V•V\
V
V
.- - - . 'A .- AM . • ''
Pass 1845
- psits isis
- -
0
Encinitas Baccharis and the Orcuit Spineflower. Sensitive plants known from the area but not
Airbase population. This coastal shrub is considered by a number of
recent luoflo:r.itts 10 represent a distinct species (as opposed to the detected on-site are discussed below.
common inlanJ shrb referred to Qiercus berbe ridVolia). It often has a
- rounded, almost pruned aspect which is quite different than the more CALtIORPnA ADfltPinA (Adolphia caflforiilca)
erect growing, inland shrub. In-addition, the leaves tend to be smaller, .
more spinose. and quite undulate. Ltsruca: CUPS List 2 R-E-D Code 1.2-I
- SiatciFcd. Status .- None RHAMNACEAE
k.ow4 Snu: This coastal scrub oak occurs at a variety of locales such as Point Loma DlS7Rsai.mo: Coastal San Diego County; Baja California, Mexico
, ' and Toney Pines Suit Park along the immediate coast. Occasionally it ' ' ' ' lLtaiur: , This short shrub Is often Intermixed with Diegan Sage Scrub, but
occurs inland such as on the Miransar. Naval Airbase where it grows in occasionally occurs In peripheral chaparral habitats, paillcularly hillsides
considerable numbers, in the hills at Camp Elliot. and on the northwestern neat creeks. The California Adolphia (sometimes called. California
slopes of Otay Mesa. A characteristic, low-growing colony is found on Spinebuth) Is usually associated with £i-ioonwn fasciculanmi and
the peak east of lnterstatc I S and south of Poway Road. Numerous - ' ' ' Anemisia calj(ornlca in acne locales where shrub canopy reaches (our or
populations are now isolated in the urban-canyons of San Diego City ' ' five feet in height. During late summer and fall it may be virtually -
neighborhoods such as Linda Vista and Claremont (e.g. west of Mesa leafless and, therefore, not apparent (jam a distance; however, its spiny
Junior College). Herbarium specimens examined from San Diego County, stems are readily noted at close range. The San Miguel and Friaisi soils
include sites in Missioii- Valley, on Kearny Mesa. neat La Cencilla and - ' , are both quite amenable to California Adolphia.
Skyline Drive in Rancho Santa Fe, Soledad Mountain, and near the
University of California at San Diego campus. One bush grows at Dana —s K.rowt Seats: California Adolphia: is still found at a variety of coastal San Diego County
Point in Orange County. and a sizeable colony grows adjacent to Pacific , locales. Substantial populations occur south of Dcl Dios Highway and 1
Island Drive in Laguna Niguel. Also reported by Roberts for Orange -- ' ' mile southwest of We Hodges Dam on steep north-facing slopes, and on -
- " County at in Auto-Wood Canyon Regional Park and nearby Los Truncos ' ' ' south-facing slopes' of Escondido Creek east of Lake Val Soreno. A very
'Canyon. ,. ' - - extensive colony was discovered In 1990 near the Inspiration Point Cross
north of the Questhaven Retreat with over- 1000 shrubs. One of the
-' Three voucher specimens from.Baja California are found in the herbarium largest sites noted isa football field sized colony almost entirely composed
- of the San Diego Museum of Natural History; wuth'to 31 12' North at of Adolphia upstream of the Sweetwater Reservoir, south of the old
- San Antonio de Is Mesa where collected'by Moran (64723 SDhlN'H). wooden bridge, on the south side of the rivet; as well as several thousand - -
0 ' ' 0 '
' , across the river and., just upstream where they are a dominant element
- STAtuS: Coast Scrub Oak is substantially declining in San Diego County due to. . , within the sage scrub. Another tarp population occurs on a west-facing
urban expansion along the coast. Taxonomic work is necessary to 0 slope east of Saxony1Road near Báuqustos Lagoon. This shrub was noted
'0 determine the frequency of intergradation between this entity and the form - . - in limited numbers at numerous other surveyed sites Including the finger
' referred to Q.e,cur berbc'idVolio. Obvious hybrids between the Coast ' canyon east of Dillon Road on southern Ot.ay Mesa, at scattered locales
. . Scrub Oak and Quer.us engelmannis are found In the chaparral west of . - ' ' in Otay Valley east of the lnterstatc-805, in the sage scrub north of Lower
Walnut Creek Road in Encinitas. A CUPS R.E-D Code of 1.2.2 is - - Ouy Lake, below Sweetwater Dam, a hillside west of We Murray Dam,'
- - recommended. , ' 0 , along San Marcos Creek south of Lake San Marcos, west of Melrose -
Drive and south of Shadowridge Drive In Vista and on north-facing
This shrub has bcen'recently proposed for listing by the CUPS during' spring 1992. It '7. slopes of PeAasquitos Canyon Just south of the 'mothballed water
treatment plant near Poway. Small populations were seen near Akita Lane
0 is relatively well distributed on the north-facing slope ovirlooking the disturbed fields. 0 0 ' in Rancho Santa Fe, at the eastern terminus of Rosemont St-reel in La
Jolla, south of Aliso Canyon Road neat Rancho Santa Fe. on the Green
SENSITIVE PLANTS KNOWN FROM THE REGION Bur NOT FOuND ON-SITE - - , - Oaks Ranch at Agua Tibia Creek, on. canyon slopes west of Black
Mountain Road and north of Pcñasquitos Canyon, on the eastern boundary - 0
The site falls within an area of San Diego County which is fairly rich in endemic plants •
' , of Fairbanks Ranch, near Mercy Road east of Interstate-IS, and new the 0
InterscctIon of Poinsettia Avenue and Palomar Airport Road. Also, old - 0
and habitat restricted species. Se%erxl plants which are known from the immediate area have -
- - •
reports are north to Moro Hill, at Evans Point near Aqua Hedionda
Lagoon, on the east slope of Battle Mountain at Rancho Bcrnardo, and
the potential for occurring on the native chaparral slopes of the site and were sought during the
- -
0 ranging southeast to near Barrett Junction. -
survey but were not located. Of high concern and a target of focussed searches was the
21 ,
26
. .
;VV
•V - -V fS ,,~ . ,- 'V --
V
S
- V
• P585 184$ V P585 184$
V
'Collected south in Baja to 30' 6' North by Moran (81216 SDMNH) at V
V particularly successful; nursery grown stock should be transplanted to V
Sauzalito-2. Lightly collected in Baja with 14 specimens in the San Diego V V V biological open space preserves within its historical range. V
V V Museum of Natural History's herbarium. -
-
V
:
- SEASIDE CAI.ANDRINIA (Calandrinia nianuima) - V V
STATUS: California Aduiphia is declining substantially due to urban growth; still
healthy populations are extant Rarely, this spiny shrub is a dominant on
V V
Lisimc
V V V V V
CNPS List 4 K E D Code 1-2-1
hiUsides and such sites should be protected. Although Adoiphia is not
- V uncommon, a decade of continued urbanization along the coast will
, • VV
DISTRIBUTION:
State/Fed. Status None PORTULACACEAE V V V
Coastal counties and islands. Santa Barbara south to Baja California,
-
V drastically reduce the populations now extant. California Adoiphia should
V - - be considered for native reveget.ation projects in suitable habitat. llADtTAT
V Mexico V
Sandy bluffs near the beach and sandy openings in Diego Sage Scrub are
This preferred habitat of this distinctive annual species may be subject
ENCI.TTAS B4CCH1RIS (Bacchorts vanessac) V •
V tOextcttSiVC herbivory owing to its succulent nature, and may also be
V - V V V• V susceptible to eradication by hikers who might crush it underfoot. AU V
V
LISw4G: CNPS List 4 R.E-D C&Jc 1-1-3 V V V V . populations noted appear to utilize moist sea•breezes. Flat-top Buckwheat
V
V V State/Fed. Status,-- CE/Cl . ASTERACEAB. V
V
V •
is the dominant shrub at most of these sites. Gaviota fine sandy In_ants are V
V utilized on Point Loma j while the soils are mapped as Terrace V V
V DtSnh$unON: San Diego County V
V V IkarraT: Chaparral dominated by Chamise is the primary habitat of this very rAre
V
V Escarpments at Torrey Pines and Swallowtail Road. V
shrub Given the limited range of this species, edaphtc requirements may ,
• - significantly restrict dispersal. Soil at Encinitas is Corralitos loamy sand V V KNOWN StIES: A small population of Diegan Sage Scrub, east of Palm Ave and the V
V V while the soil type on Mount Israel Is mapped as the quite different Interstate 805 was removed In 1988 by grading Another small population
still extant grows on bluffs at Torrcy Pines State Park This speci es Is Cieneba roLy coarse sandy loam (the Ralphs Ranch and Crest reports are
also in Cieneba soils) thuch rarer now than 50 years ago (when likely still uncommon) and is
in danger of extirpation in San Diego County. Its beach bluff habitat in
V
V V KNOwN SITES: . One mature shrub of this dioecious species remains at Oak Crest Park in
• Encinitas, and perhaps dozen seedlings were growing around it in spring ,a ,
V V
-.
southern San Diego County ii now almost nonexistent. A sizeable
population occurs On, the Point Loma Submarine Base sea bluffs, on the
V 1991. A much more substantial population across the street to the north V V -
'
east side of Point Loma. A small colony grows on a steep hillside in
Military Sector Oscar One north of the Santa Margarita River on Camp
V : was graded for shopping and light industrial use and these new seedlings
V may represent dormant seed which had not' sprouted from this earlier time
' ' V V
V V
, -
•
Pendleton. A similar small colony is found on a sandy ridge north of the
V '
V when cross.pollination among shrubs was more accessible. Further to the '
north, an illegal alien encampment has utilized another small population '
V
V terminus of Swallowtail Road In Encinitas, and over 100 plants were
clustered in a small area on a south-facing slope of Carmel Mountain. -'
- V . for firewood. The only surviving shrub here was found on a steep east-
V ' facing slope following a diligent search. One sizeable population on a , V
V
•
One old report comes from the hillsides of southern La Jolla where it is
probably no longer extant. In northern Baja California this species is
• V - , V rocky knoll was reported at Ralphs Ranch south of Lake Hodges. There
. V - -
V V
V V V
locally common near the coast at Punts Banda, La Fonda, and Jatay. V V
Much of its scabluff habitat. in northern Baja Is being developed for V - is a recent report of a substantial population from the rocky Montana
V Serena area of Crest growing with the Lakeside Lilac, as well as a - V
vacation homes. Reported by Thome from one locale on Santa Catalina
V '
V ' population on Mount Woodson. The few reports of occasional 'shrubs V V
•
, Island. It is reported by Smith on Anacapa Island on the trail above ,
Cove, on Santa Cm: Island on the sea cliffs at Coches Frenchman's
I • • V. ' near Mount Israel (south of the road by that name) are in an area burned V
by a massive fire in 1990. A healthy population of perhaps 30 shrubs was
V , V V
, ,
V Prietos and Frys Harbor, and on bluffs west of Ventura. Raven reports
seen In spring 1991 resprouting from this fire on a ridge (north of Mount . ' an historic population from Santa Monica which is likely no longer extant.
V
Israel Road) overlooking Lake Hodges to the west. All the shrubs noted
were on an east-facing slope, near the crest; several growing from
•
V
V '
-'
V
• V V
V
Thirty-four collections 'from Baja California are found in the San Diego
V - fractures in large granite boulders. A recent herbarium specimen from ' , V ,
, - Herbarium; south to 28 5' North where collected by Moran (64961
• V . V Mount Woodson pushes the -known range of this species well to the east. ,
V V V SDMNH) east of La Vuelta.
V •• • shrubs in California and an obvious candidate (or federal Endangered
' ' . , No other populations are known. Encinitas Dacchans is one of the rarest
STATUS: Seaside Calandnnia is almost extirpated in San Diego County. Only a few
species status. V - • sites for this area, most mentioned above, are now known for San Diego V
V V
V V ' • County. V •
V
V STATUS; Enclnita.s Baccharis is nearing local extirpation in Encinitas and Is - V V
endangered by urban development elsewhere. All known sites should be
fully protected Attempts to transplant this species locally have not been
09,21/52 28 05/23/92 29 V5VVS
- • - - 1 .- •.. 4 .
-. PSbSIaS PSbS 1145
SLi.fllni (Coreopsu ,si..arsgsma) of this species may be correlated with the dearth of undisturbed loose
sands in appropriate coastal chaparral areas Most of the historical coastal
LISTL'C:' CUPS List Ill R-E•D Code 3-2-3 chaparral is either developed for residential or nsilitary.u5e5, or it has been
State/Fed. Status •. 1C2 ASTEKACEAE - heavily disturbed by foot traffic in the open sandy areas where this tiny
Dis11UbUflOi San Diego County Baja California Mexico annual might grow. The related Mucronea caI/'orn1ca may have very
HABITAT: Sandstone cliffs near the ocean arc the preferred microhabitat of Sea similar habitat restrictions, and is now known in the County from only
Dahlia Presumably the moist sea breezes arc a significant factor in • one Point Loma site near an historical site for Orcuit a Spinellowcr
providing optimal habitat for this perennial with semi-succulent leaves and 1 listulous stems. Gaviota fine sandy barns are utilized at the Point Loma Kosvi't Sins: Rediscovered (not far from an historical site now destroyed) by C. Reiser
Sub-base while the Torrey Pines population grows on Terrace Escarpment . and K. lnce at Oak Crest Park In Encinitas. 'ApproxImately 20 plants
sandstones. Typically. Sea Dahlia chooses-highly eroding slopes where were seen on April Ii, 1991. in flower and inhabiting a very limited area
competition from other shrubs is limited Hcrbivory may play a role in of live by five feet Two specimens were collected and given to the
'the precarious cliffside locales often utilized. . herbarium at the San Diego Museum of Natural History;
macrophotographs of the plants in flower were taken. The habitat was a
KNOWN Snis: A stable population occurs at Torrey Piñci Preserve. A smaller chaparral clearing in loose sand downs!opcfrom eroded sandstone bluffs,
population is situated on steep east-facing cliffs at the Sub-base on Point - - - south of bike path, north of a grassy lawn, and west of a parking tot.
Loins A very small relicival population is found on a sandy ridge north This species had been considered extinct In spring 1992 the site was
of the terminus of Swallowtail Drive in Encinitas. Approximately ISO revisited and similar conditions and population size were noted A
shrubs grow in a highly eroded drainage on sea bluffs south of Shingle reported occurrence at Torrey Pines east of the main road and above the
Bluff on Camp Pendleton Sea Dahlia is uncommon in the Tijuana Hills salt marsh was not confirmed both Chodzauhe procwnbcns and
. near the ocean This species occurs on Carmel Mountain on north-facing Chonzarnhe stoucoides were seen at this locale and no specimen was
slopes near the quarry. Most historical sites in the County have been collected by the original reporter to substantiate the identification It
extirpated by construction of ocean view Iota A curious old report cannot be relocated in appropriate terrain at the Del Mar annex to Torrey
occurs inland near Escondido Creek east of Olivenhain in a rocky gorge Pines State Park or neat Fort Rosecrans Cemetery on Point Loma. Most
• Other old reports are from Spooner's 'Mesa near the border, Oceanside, potential habitat Is currently being considered for urban development
and at Cardiff. Scattered, vigorous populations are seen along rocky '. within the cities of San Diego, Del Mar, Solana Beach, and Encinitas.
headlands along the immediate coast of northern Baja California from
, Rosanto Beach south to Punta Banda. Several plants grow on a rocky STATUS: Only one site is known lobe extant; Orcutt'a Spineflower is very close to
knoll well inland near Rodriguez Dam east of Tijuana extinction The lone site is endangered by Illegal aliens who regularly
-
-
- - sleep in the chaparral, and by park visitors who walk randomly through
Thirty-six specimens from Baja are found in the San Diego Herbarium; - , openings in the shrub cover. A small fenced enclosure should be installed
south to 30 31 North where collected by Moran (84492 SDMNH) west by the City of Encinitas to protect this population
of San Quentin
WESTERN DiCsIONDRA (Dichondro occidensolis)
Smms: Sea Dahlia is substantially declining in San Diego County. Natural
erosion on scabluffs and hoñses built yards to the cast are not conducive - LIgnNG: - CNPS List 4 - R-E-D Code 1-2-I
to long term survival of this 'species. It may benefit from seeding or ' State/Fed. Status -- /C3c CONVOLVULACEAE
planting on sandstone bluffs overlooking the ocean DisTIuBrnoN Sonoma and Mann Counties (questionable) disjunct to San Barbara County
south and along the coast to Baja California
Oacurr!s SPiNrnMwER (Chorizonrhe orcutiju nu) - ' - llthrrAT: Southern Mixed Chaparral, Diegan Sag; Scrub, rocky outcrops in
' • • grasslands, and particularly as recently exposed areas on bums are alt
LislttG: CUPS List 18 R-E-D Code 3-3-3 - • - habitats sometimes occupied by this small, cryptic perennial herb. It often
' ' State/Fed. Status .- CE/Cl POLYGONACEAE ' grows in rocky crevices or completely hidden at the base of leafy shrubs.
DtsrasetrnON: San Diego County ' Soil tolerances for Dichondra appear variable with Loamy alluvial land of
HABITAT: Coastal Chaparral openings in Chamise,' with a distinctive loose sandy- the Huerhuero complex utilized at Torrey Pines, Hambnght gravelly clay
• substrate, is the likely microhabitat for Orcutt'i Spineflower. The Oak ' loam in the San Onofre Mountains, and a variety of other types elsewhere.-
Crest Park site is mapped with a division ofsoil types: Corralitos loamy - -
• sand and loamy alluvial land in the Huerhuero complex. Carlsbad Kiiowri Sins: Western Dichondra is occasionally common following burns in coastal San
- • - gravelly loamy sand or Gaviota fine sandy loam are presumed to be the . - • Diego County, as near Black Mountain Road south of Pcña.squitos
soil type for the historical Point Loma population A factor in the rarity Canyon It is potentially present at many county sites in coastal Chaparral
0912.1191 30 09125/il 31
P515 114$ P585 :845
or Diegan Sage Scrub. It is abundant on the slopes above the ocean at the
Torrey Pines Preserve as a dominant understory element. Dichondra is
a widely dispersed understory plant in Military Sector Alfa Two on Camp
Pendleton with sightings extending throughout the San Onofre Mountains.
It is expected to be abundant following a Are which burned most of the
coastal slope of this range in 1990. Among other sites are the Jamul
Mountains north of the glider port and Lower Olay Lake, on the peak east
of lmerstaie-l$ and south of Poway Road, on the southern slopes of Otay
Mountain, near Windmill Lake Golf Course on Camp Pendleton, and
north of Poggi Canyon In Chula Vista. Three reports are from Fortuna
Mountain, south of Poway Road on a slope at the end of Cobblestone -
Creek Road, and the top of Poway Grade; however, most historical sites
are clustered near the immediate coast. Limited populations were seen at
the head of Wruck Canyon near the Mexican border, east of Ruffin Road
and just south of Highway 52. north of Swallowtail Lane in Encinitas,
near Canyon Drive in Oceanside, near the Intersection of Questhaven and
Elfin Forest Road. and near the Wire Mountain housing on Camp
Pendleton. Some representative herbarium specimens include the summit
of Mother Miguel Mountain. north of the Del Mar Racetrack, south of
Gonzales Canyon and east of El Camino Real, the southeast side of Osuna
Valley. San Marcos Creek. the bluffs north of Jefferson High School in
Oceanside, and on Spooner's Mesa in the Tijuana Hills. Among the
numerous reported sites ate 0.2$ mile north of the San Ysidro Border
Station, on Soledad Mountain neat the radio towers, near Inspiration
Drive and Terryhill Drive In La Jolla, near La Jolla Rancho and
Ravenswood Road and La Jolla Corona Drive, near Kearney Villa Road
by the checkered water tank, near Mesa College west of Linda Vista
Road. on a ridge on the southwest side of Fortuna Mountain, near the
glider port and Salk Institute at Torrey Pines. east of Pine Needles Drive
and Hidden Pines Road in Del 1tar, cast of Via Torina off of Cannel
Valley Road, in a tributary of Gonzalez Canyon west of Black Mountain
Road in North City West, north of Via de la Vale near Nardo Avenue in
Del Mar, west of the El Camino Memorial Park along the side of Carroll
Canyon Road, northwest of Camino Ruiz in North Mira Mesa, I mile east
of Scripps Ranch, at the end of Santa Fe Drive between I and K Streets
in Encinitas, scattered about Lux Canyon in Encinitas, in -Solana Beach on
the south side of San Elijo Lagoon, north of Agua Hcdionda Creek and
west of Dawson-Los Manos Reserve in Carlsbad, on the south side of
Agua Hedionda Lagoon between the railroad tracks and Interstate-S, I
mile south of San Francisco Peak, I.S. miles northwest of Loma Alta
Mountain, north of Ramblas de las Flores Road in Rancho Santa Fe, east
of Whispering Palms Golf Course in Fairbanks Ranch, and north of San
Marcos Gorge and I mile south of Rancho de lot Quiotes. This species
is rate as Dana Point in Orange County on bluffs near the ocean. It Is
reported in La Jolla Vallày and Deer Canyon in Ventura County; the ridge
between Tuna and Topanga Canyon in Los Angeles County, as well as at
Point Mugu and at Leo Carillo State Park. It can be seen on the castcm
slope of Bands Peak at Punts Banda in Baja California.
Thirteen specimens from the herbarium at the San Diego Museum of
Natural History are recorded; south to 31 I 4' North where collected by
Moran (105343 SDMN1I) three and a half kilometers cast of El Rodeo.
STATUS: Western Dichondra It slowly declining in coastal San Diego County and
Is a borderline species for inclusion on the CUPS list. Sites with very
high densities are, however, noteworthy.
ASHY SPtaE-MOSS (Selaginella cinerascerts)
LIsTu'ic: Unlisted
State/Fed. Status -- None SELAGINELLACEAE
DISTRIBUTION: San Diego, Orange counties; Baja California, Mexico
hABITAT: Undisturbed chaparral and Dicgan Sage Scrub are often utilized by this
prostrate perennial groundcover. It Is a good Indicator of site degradation
as it rarely inhabits disturbed soils. Many soil types are utilized with
Redding cobbly loam apparently an optimal soil type near Miramar..
KNoavr- Sties: This species is ubiquitous as many sites in coastal San Diego County,
primarily south of Highway 78, with the populations heaviest around the
periphery of the City of San Diego. It occurs by the many millions. It
. is a dominant ground cover at Miramar Air Station and innumerable other
sites In open chaparral and sage scrub in this region. It Is found
northward to the Wire Mountain housing area on Camp Pendleton near
Seal rock north of Escondido, -and eastward to Starvation Mountain, off
Magnolia Road in Santee, by Ehman Road In Poway, and west of Dancy
Canyon neat Ramona. Reported eastward to the Poway Grade, on the
Daley Ranch northeast of Escondido, at Alpine, and on a northeast slope
by Lawson Creek in Sloane Canyon. This spike moss is very common
south Into Baja California as at Puma Banda. Reported by Roberts in
Orange County at Rancho Mission Viejo west of Cnstianitos Canyon and
Shady Canyon in the San Joaquin Hills.
Eight specimens from Baja California are found at the San Diego Museum
of Natural History's herbarium: south to 32 18W North where collected
by Moran (101384 SDMNH) on a slope above the sea 4 km southeast of
Punts Cabras.
STATUS: Ashy-footed Spikemoss is declining due to urban expansion along the
coast. Nevertheless; this species is now proposed for deletion from the
CNPS listing--it is much too common.
SENSITIVE ANIMALS
The following species described as sensitive are those which have received recognition
by various local, state, or federal government, concerned group, or species which are known
by local biologists to be in decline or of very limited distribution In the region. included among
092i/t2 3) 09/atlaS
.'-
*
PUS ISIS PSSS ISIS
these are several species which recently received USFVS Category 2 status indicaung they may RED-SIIOLII OCRED lIwK (Buico Isneazus)
be declining and would warrant lulurc listing as Thraicncd or Endangered however. further Lisnt4G SDNOWS (1976) Species of Local Concern
- Orange County (Gray and Bramlct 199 1) - Species of Local Concern
investigation Is needed before such a determination can be made Listing status designations are Audubon Blue List (Tate 1986)
DJsTaIBLmON Wide spread in the cast restricted to California west of the deserts in the
discussed in Appendix 4 western Untied States
lLaiThT Woodlands and in California exotic tree plantings
Nine sensitive wildlife species were identified on the site STATUS Uncommon to fairly common resident in woodland habitats
CORONADO SKINK (Ewnctcs skslionianisz tnrerpane:ahs) The Red shouldered Hawk is regularly found in riparian woodlands and other native and
LisrR4G USFWS (1991) Category 2 non-native (eucalyptus) woodlands of the county. It is not viewed as having a particularly high
CDFG (1991d) Species 01 Special Concern
DISTRIBUTION Found in northwest Baja California including Coronado Islands north into sensitivity as it appears to be fairly tolerant of human activities and persists well to rural areas
- Los Angeles County. -
hABITAT Occurs in a variety of habitats including grasslands sage scrub and pine where sufficient woodland roosting/nesting habitat lies near productive foraging lands This
oak forests
STATUS Limited in range but still common raptor is probably resident to the high quality woodland Just off site to the northwest where it
One Coronado Skink was observed on site in 1989 however the locality was not has been observed previously (1) Mayer pers. cbs 1991) It may also reside In Eucalyptus
recorded as it had no sensitivity recognition at the time of its detection The species is likely groves in the vicinity. One individual was observed on site in the willow woodland during the
to be present throughout the property but is most typically detected beneath moist debris. The 1989 fieldwork
Coronado Skink Is believed to still be common in suitable habit.als within its limited range and DOWNY WOODPECKER (PicOidc$ pubescens)
it is not viewed as being particularly sensitive at this time LiSTINGS No official listing
DIThON: Widespread breeder In North American woodlands
SHARP-SHINNED HAWK (1i spud Sit/atiss) HABITAT: In Southern California npanan woodlands dominated by willows and -
cottonwoods.
LISTING CDFO (1990b I9914 Species of Special Concern STATUS Rare to uncommon breeding species in San Diego County (Unilt 1984)
- SDNGWS (1976) - Species of Local Concern . the San Luis Rey River is near the southern range limit for this
Audubon Blue List (Tate 1986) woodpecker. Formerly more widespread.
DisT1iBLmoN Fairly common winter resident in Southern California possibly breeds in
northern California.' Downy Woodpeckers have shown themselves to be regular inhabitants of the vicinity, and
HrrAT Mixed woodlands
STAnIS Fonnerly nested in Southern California mountain ranges May possibly arc a strong indicator of good habitat quality. One individual was observed on site during the
nest in the San Jacinto Mountains, although summer sightings are rare,
-. and its breeding status is uncertain. - - '
-
. spring 1992 investigations; however. it was only observed on one occasion. This species was
The Sharp-shinned Hawk is a regular winter visiior to Southern California where it can also observed on site during the previous season (C Edwards pars cbs) Although it is not
be found in a variety of habitat types although it most commonly associated with woodlands considered likely to breed on the property at this time. due to the limited amount of on -site
One individual was observed foraging over the chaparral during the 1989 fieldwork The observations there Is some potential for such occurrence in the future if local populations
proposed project would likely lead to decreased use of the site by this species increase -
COMM 31 - ,1,l92 3$
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Willow Flycatchers are regularly found in woodland habitat during the spring and fall NORThWESTERN SAN Dier.o PncKFr MOSJSE (Pcronu:husfu!!a.xfallaa)
migration; however, the subspecies L. :. ereimus which breeds in San Diego County has greatly . LiSTiNG: USFWS (1991) . Category 2
Oisrivat.mON: San Onofte north to Claremont, northeast to Banning, then south to
declined. The population crash is presumably due to habitat loss and brood parasitism by use Jacumba and on into Baja California to San Quentin.
hABiTAT:- Sage Scrub
Beown-headçd Cowbird. Willow Flycatchers were observed on the subject property and STATUS: Unknown, believed to be declining due to extensive habitat loss due to
development.
immediately adjacent areas during June 1991. but they were believed to be migrants and did not - This is a recent addition to USFWS Category 2 status due to regional habitat losses.
show signs of nesting (Claude Edwards, personal observation). The observations are very Recent (1992) trapping efforts by Pacific Southwest have found this species to be present in all
- interesting but are not biologically -significant in that this 'species can be predictably seen in trapped sage scrublands to date, encompassing areas from new San Miguel Mountain to
highly uncharacteristic habitat during the migration season, such as in exotic plantings at Point . Temecula. .Although the loss of wildlife habitat, particularly sage scrub, throughout Southern
Loma. The presence of breeding Willow Flycatchers in the vicinity would be extremely . California is.a very high concern this species does not appear to warrant inordinate concern
significant, however. - . - . • .
-
. . above that given to other scrubland-associated species.
,-. . Yet,tow-IREASIID Ciul (kuria tirern) - . . . . . •• . . .
SENSITIVE ANIMALS POTENTIALLY OCCURRING ON-SITE
LISTING;' CDFG (1990b, 1991d) - Species of Special Concern -
fltsmlaunoN: Formerly widespread breeder in riparian habitats throughout 'California. - . Sensitive species which were not detected on the Specific Plan Site but which have the
I1ABITAT5 Southern Willow Scrub
STATUS: Once fairly common in riparian habitats throughout California. At present potential for utilizing the site on a resident or seasonal basis are discussed below. Most of these
it Is much less common, especially in Southern California due to habitat .
- . destruction. . - .- - . - • -
species are either seasonally absent or extremely cryptic in nature and would not have been.
The Yeliow-breassed Chat is another riparian breeder which has shov'n noticeable expected to be located during normal field surveys. Where the potential for occurrence of a
population declines In recent decades. Particularly interesting about this species is that It species Is high, a discussion of the significance of expected impacts to the species is also
. - generally occurs in structural diverse or moderale.aged riparian woodland growth rather than provided. -
stands of very large, old trees. It is, therefore, often used to indicate suitability for the Least . The project site supports substantial well developed riparian woodland along Encinitas
.
Bell's Vireo,-which also tends to bteed in areas which receive heavy periodic scouring at 5- to Creek. These areas form the uppermost extensions of a much larger high quality riparian
IS-year Intervals which results in new willow growth. . . woodland located through Green Valley down to Batiquitos Lagoon. Such areas are typically
When on a breeding tcmtory, this bird is usually easily dctectCd due to id-loud and - utilized by a variety of sensitive migrant and resident wildlife species. Among these are a suite
distinctive song. One individual was observed on 18 June 1992 but its lack of a regular of riparian birds which could potentially nest on the site. These include the Yellow Warbler
occurrence suggests it was not breeding on-site. Habitat quality is considered quite suitable, (D ,4roica petechia), and of highest concern, the Least Bell's Vireo (Virco belill pusillus).
- however. - - - - - - -
- Os/2JI92 s 38
•
- . 39 -
- V- -S -- - -- AM V - ._. -
V
-
- P5851815
S.xN DIEGO IIORP.ED I.uz;itn (Phrynown:a euronaiwn bluinvilla) -
Lwnz'G: USFWS (1990 - Category 2
CDFG (1990b. I991d) - Species of Special Concern
-. CDFG (99Ia) - Fully Protected
SDHS (1980). Endangered
SDNGWS (1976) - Speciezof Local Concern
Ashton (1976) - Threatened V V.
Bury (1971) Proposed for classification as protected
Stewart (1971) - Depleted V
CITES (1976)- Category .2
- IUCN (1979) - Depleted -
DISThIaUUON: California and Baja California,'Mexlco
HAarrAfl Open chaparral, sage scrub, pine/oak woodlands, and along washes.
STATUS: Declining, primarily due to habitat destzuction.and habitat degradation.
-
Pet collection has also attributed to their decline. V
Horned Wards were formerly common residents of scrublands and chaparral but have
vastly declined in the face of urban developmentWhile whipt.ails seem to persist in suitable
habitat the horned lizard appears to become extirpated where human encroachment abuts open
land. The San Diego Homed Lizard is given a low to moderate potential for occurring on-site
at this time.
V
V
OaANCETITROAT WwrrAli. (Cnemidophurus h)ptrythner belJings)
V LISTING: USFWS (1986. 1989, 1991)- Category 2 V
V V CDFG (1990b, 1991d) -Species of Special Concern V
V SDHS (1980) - Threatened
V - V SDNGWS (1976) Species of Local Concern V
V CITES (1976)- Category 2
IUCH (1979)- Rare
DasriurioNs Limited; found from southern Orange County, western Riverside and Sass
Diego counties south to southern Baja California. Mexico.
HAIrrAr, Open sage scrub, chaparral and along the edges of riparian zones and
washes.
STATus:. This species is still relatively common in areas where good habitat occurs;
V however, vast areas of former habitat in the coastal lowlands has-been -
convened to urban and agricultural development. -
Surprisingly, Orangethroat Whiptails were not observed on the property; however, the
majority of field work was conducted during early to mld.morning hours when cooler V
temperatures prevailed. Although open scrublands and chaparral is often reported as the
preferred habitat for this species, it is also regularly found in grassy and disturbed habitats, as
0912,. 40
7V
- PSBS 584$
V V-
well as riparian edges. As Orangethroat Whiptails are reported to stilt occur in the vast majority
of their historically reported locales provided that suitable habitat remains present (Bayard
V
Brattstrom, personal communication), they are expected to still be present on the subject
V
property. Orangethroat Whiptails are found in similar habitat in the vicinity of the project site
LPSBS 1991)
V COASTAL WIIIPTAIL (Cnernlduphorui :1 rii muhiscista:ui) V
V
LiSTING: USFWS (1991)- Category 2 V V
V V
V DISTRIBUtION: Santa Barbara County southward through the northern two-thirds of Baja
V California, Mexico. I V
V IlASITAT: Open sage scrub, chaparral, open woodlands and bordering areas, along
the edges of ripanan zones and washes, desert and semi-arid habitats.
STATUS This species is still relatively common In areas where good habitat occurs
however vast areas of former habitat in the coastal lowlands has been
convened to urban and agricultural development. V
Coastal Whiptalls are also expected on the property and were recently located to the west
(PSBS 1991). This species appears to be less common in the near-coastal areas compared to the
V Orangethroat Whiptail; however, the Coastal Whiplail -isoften found in abundance in more
inland and locales
CALIFORNIA Lirri-Ess LIZARD (4niclla sIgra)
LISTING: USFWS (1986 1989) Category 2
- V CDFG (1990b, 1991d) - Sensitive - SDHS (1980) . Threatened
SDNGWS (1976) - Species of Local Concern
Stewart (1971) - Could easily be depleted V
V Bury (1971)- Proposed for classification as Rare V
V - : IUCN (1979) - Endangered .
: DtIBtrflON: Coastal California from San Francisco south to Baja California
hABITAT: Areas of loose soil, particularly alluvial fans
STATUS: Unknown, likely declining due to habitat loss' V
The loose alluvial sod are ideally suited to the legless Lizard however it is seldom
encountered. It is given a moderate to: good chance of being present on-site. Similar sandy -
- coastal habitats to the south have been noted to support this species (Lichtwardt, personal
observation; Merkel, personal observation). -
S - V
41-. •V -
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-
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-
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PSB5I81$
S.N DIEGO RINCNEcK SsE (Diudaphil pullt:u:u.r sinuhi)
LISTING: USFWS (1991) - 'Category 2
DismiBunoN: Spotty coastal San Diego County south to northern Baja California.,
Mexico. Found from sea level to 7000 feet.
IIAarrATs Moist habitats in chaparral and sage scrub.
STATUS: Unknown
Another species not frequently encountered, the Ringncck Snake could easily be present
on-site. Information is lacking as to its distribution and abundance, and it is a recent addition
to USFWS Category 2 listing.
Tvo-srRwec) GARTER SNAKE (Thamnopiis )ta,nmondi)
LISTING: USFWS (1991) - Category 2
CDFG (1977 1988 1989 19914) Sensitive
I1JCN (1979). Depleted
SDHS (1980) - Threatened
CITES (1976)
Ashton (1976) Threatened
Bury (1971) Proposed for classification as protected/ltsted reptile
Stcwan (1971) -Depleted
DssralaunoN: Coastal California and northwest Baja California, Mexico
IlaarrAT: Along creeks, rivers, and in freshwater marshes and vernal pools.
SlAms; Once common in Southern California; at present, appears to be declining
due to habitat disturbance.
The Two-wiped Garter Snake is the county's only truly aquatic snake. The on-site
habitat quality is excellent for this species but the historic uses of the site diminish its potential
occurrence. If resident, it is likely present in relatively small numbers compared to more
secluded localities. This species is known from several of the fringe areas surrounding coastal
lagoons at San Elijo, Agua Hedionda and Buena Vista.
BLACK-SHOULDERED Krr (Elanus cacruleus)
LISTING: CDFG (1991a, 1991d)- Fully Protected
Dss'raiaunoN: Central Valley and coastal California; extensions north into Oregon and
south into northern Baja California, Mexico. Northeastern mainland
Mexico populations often extend north into the United Stales.)
HABITAT. Grasslands, agricultural fields, occasionally shrublands of California's
coastal valleys and plains.. Marshes and grassy bottomlands where large
clumps of trees are adjacent to foraging habitat are favored sites for winter
roosts, "
OVUM -. 42
- Aw ' T .-.- ......-.
PSBS 5145
STATUS: The centers olabundance for these raptors in Southern California are the
coastal valleys and plains of San Diego, Orange; and western Riverside
counties, which are the areas which are currently undergoing large-scale
and rapid habitat conversion• due to residential development. While
historic population fluctuations have made their present status difficult to
determine, the numbcrsoI breeding individuals are thought to be declining
locally in some areas, and wintering populations may be diminishing as
well due to loss of winter foraging habitat and roost sites.
The on-site woodlands. may not be sufficient to support nesting by Black-shouldered -
Kites; however, it does present excellent foraging habitat due to the flanking marshy areas and
disturbed fields. This species was reported from adjacent land to the east (RECON 1986);
however, considerable urbanization has occurred since that time.
COOPER'S ll4tK (4cclplter cooperu)
LiSTING CDFG (1990b I991d) Species of Special Concern
Audubon Blue List (Tate 1986)
DiSTRIBIJTION: Throughout the' United States -
IharraT: Open woodlands and wood margins
Smuts: This hawk has declined, throughout California as a breeding species.
Remsen (1980) identified habitat destruction In lowland riparian areas as
the main threat, as well as direct or indirect human disturbance at nest
sites.
Habitat is probably not suitable to support nesting by Cooper's Hawks as they prefer
rather isolated and/or, very high quality woodlands. Possible habitat is found downstream in
Encinitas Creek. As Cooper's Hawks are more widespread in the winter, they may forage on
the property as infrequent to regular intervals during the non-breeding season.
CALifORNIA hORNED LARK (Ere,nophila alpestnz octia)
LISTING: USFWS 1991 - Category 2 .
DtsThthLiflON; Several subspecies of Horned Larks occur, being distributed throughout
North America. Although several other subspecies are reported to occur
and may breed in San Diego County, E. a. actia is reported to be the
most common on the coastal slope.
IltarraT: Sandy shores, bare ground, grassland, open agricultural land, and open
scrubland.
STATUS: Common breeding resident, abundant migrant and winter visitor in San
Diego County (Unitt 1984) .
04113191 . . 43
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individual impacts to be considered biologically significant. Similarly the loss of foraging The proposed development in this area would also impact a portion (approximately 3 7
habitat (disturbed fields) for the Loggerhead Shrike and various rapiors is considered an acres) of a California Gnatcatcher territory.'While the amount of area impacted is a relatively
incremental but not significant impact small portion of the overall observed use area and lies well away from the nesting locality. the
PLANNING AREA 1 llobll. DLPOT Si IL patch of Coyote Bush (within Disturbed Field vegetation) which would be lost was an area of
BIOLOGICAL I%iPAC1, noticeably higher utilization by the resident pair. This impact would therefore be considered
The proposed plan and project for Planning Area Is the construction of a Home Depot imficant
retail warehouse facility along with associated parking lots. The project would result in a loss With the project approximately 10 acres of the site would be converted to asphalt
of 0 I acre of Southern Willow scrub and 2 9 acres of fallow field wetlands Due to the parking and rooftop areas Associated with this would bean increase in metals oil grease and
wetland characteristics of these areas the wildlife values associated with riparian areas the trash entering the drainage system The results would be a general degradation of water quality
tremendous decline in wetlands over the past decades and the general loss of restoration in downstream drainage areas Because of the magnitude of the proposed project and the
potential in field lands this loss would be considered significant at a CEQA level In addiuon proposed nuisance water and stormwauer discharge directly to high quality wetlands less than 1 5
the project would result in temporary but repetitive impacts to wetlands surrounding the El miles above Bataquitos Lagoon impacts to biotic sysi .s a result of degradation of water
Camino Real culvert crossing as a result of flowage maintenance cleaning of the culvert system quality are considered to be significant
This impact would also be considered significant In addition the proposed project would The construction and operation of a Home Depot facility is expected to produce a
significantly encroach on existing high quality wetlands located along the flowhne of Encinitas measurable increase in noise both from the facility itself and associated automobiles While 60
Creek and is expected to result in a reduction of use by less disturbance tolerant wildlife species db is often used as the threshold for impacts to birds (via Least Bell's Vireo studies) this level
The proposed project would eliminate approximately 10 acres of fallow field habitat and does not appear to be an issue with regards to California Gnaicaichers as they have been found
would restrict the floodplain of Encinitas Creek in so doing In addition the proposed project resident in areas which receive much higher chronic or intermittent noise levels than anticipated
would remove approximately I 4 acres of well developed Coastal Mixed Chaparral habitat (6.5 with the proposed project For example resident California Gnatcatchcr pairs are found in very
PC rcent of total chaparral) These losses would be incrementally adverse but not significant close proximity to 1-805 near. Rose Canyon and on Miramar HAS lands immediately adjacent
to Manchester Avenue and beneath the flight path of Jets on both Miramar NAS and as the El
Toro Air Force Base All of these locations experience fat higher noise levels than the Home
Depot site yet gnatcatchers continue to occupy and breed in these conditions Therefore noise
from the proposed project is not expected to significantly affect California (inatcatchers
09I2J193 47 09/li/si 49
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f Zones 3 and 4 In luding non irrigaird and irrigated planting areas RESIDUAL tTSIPACTh
should not contain plants which are known to escape from
cultivation In particular various ice plants Ngaio Pampas Grass With the incorporation of the measures outlined above and those identified in the SP text
Fountain Grass and similar invasive plants should be prohibited
from use within these zones and figures the biological impacts of development in PA 2 would be adequately mitigated to a
With the Inclusion 01 these measures fuel management proposed within the less than significant level
Specific Plan sacs would be acceptable from a biological perspective.
PLANNING AREA 3 PIERCE PROPERTY COMMERCIAL/LIGHT INDUSTRIAL
3 The proposed SP incorporates the planiing of areas which are selectively
thinned and areas of non irrigated buffer with drought tolerant natives BIOLOCICAL IMPACTS including containerized Del Mar Manzanita and Coast White Lilac The loss
of sensitive plants including 2 Del Mar Marizannas and approximately Planning Area 3 is a 7 7 acre parcel of land on which 2.6 acres of the area Is proposed
200-350 Coast White lilac is considered to be of minor significance and
should be mitigated through replanting of liner and one-gallon sized container for Commercial/Light Industrial uses with the remaining 5.1 acres of steeply sloping hillsides
plants totalling two nines the total number lost into disturbed areas of the
open space chaparral This planting should be conducted during the early being designated as open space No project plans have been proposed for this site at this time
winter months to take advantage of high soil moisture and maximum growing
season A temporary drip Irngation system or intermittent hand watering Full development of the proposed use area would result In the loss of 0.39 acre of field wetlands
would be necessary to carry ihese plants through a six-month establishment
period This measure adequately mitigates the nominal impacts to these of a low quality These wetland losses would result in an incremental adverse impact on the species
4. Under the cnbwall design which Is an alternative proposed for the southern system and a loss of restoration potential in these areas If the area is used for projects
-
boundary of the Home Depot structure impacts to the Coast Scrub Oak are generating high levels of activity impacts to intolerant wildlife would be expected The level
not considered biologically significant. Under the alternative grading design.
a significant portion of the Coast Scrub Oak will be directly Impacted. Use of wildlife resource decline would be dependent upon the usage and, therefore. It Il not of the cribwall is recommended to mitigate potential impacts to the oaks.
predictable at this time Assuming a high Intensity of use encroachment impacts are presumed
S To address sedimentation impacts, the proposed project would incorporate
timing constraints on grading and should restrict grading to April IS through to be significant October IS with the later months preferable as they do not conflict with the
gnatcascher breeding season. Teniporary desiltation basins and standard - - Planning Area 3 also includes stands of Coyote Bush which are of Importance to the
construction sedimentation measures should be implemented to prevent runoff
from transporting sediments from the site during construction. Exposed slope California Gnatcatcher. Any impacts to this resource would, therefore, be considered
cuts should be immediately reseeded with a suitable erosion control ground
cover after completion of grading efforts. Long-term sedimentation impacts significant should be addressed by ensuring slope stability adequate slope drainage
systems are utilized and effective revegelation of exposed slopes Like the storm water runoff issues of PA I this planning area If developed would
6 Although impacts from proposed development in Planning Area 2 are clearly contribute Incrementally to the degradation of water quality. The significance of this
the most direct to California Gnatcatchers mitigation means are performed
an the same manner as discussed for Planning Area I contribution would only be determinable knowing the degree of hard substrates and the ultimate
project uses anticipated For this reason it is presumed that a substantial portion of the site will
be given to light industrial yard or pal-king uses and Impacts are deemed lobe significant at the
plan level
09113192 s-i 09/1392 55
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Because of the sites location low in the watershed. the effects of contamination are increased ADDITIONAL AGENCY PE1thflTT1NG
by a lack of natural treatment oppostunity along the water course prior to entering into SCnSIt1VC The proposed Spcciftc Plan includes land use designations which would require additional
wetland as agency permits and agreements to complete. These permits would be required for areas
Mmc AnON MEAS1rRL impacting wetlands and jurisdictional waterways found along the Encinitas Creek drainage. For
The following mitigation measures have been incorporated under the SPA or are PA I, proposed development permitting under Section 404 of the Clean Water Act and the
recommended by the environmental review biologist to off-set impacts of the proposed PA 4 development of a Streambed Alteration Agreement with the California Department of Fish and
plan designations. Game pursuant to Section 1600 et seq. of the Fish and Game Code would be required. A Corps
I. Future proposed development of this area should be waled back along the Permit has been acquired for the Home Depot development (PA I) as proposed in the Specific northern boundary of the parcel to those areas outside of existing wetlands.
In general, this would restrict access to that area falling within the SDG&E Plan. No - permits from either of these agencies would be required for development, as casement and a narrow strip of land along Olivenhain Road. - Because of
restrictions on structures within the easement area and a lack of depth in areas proposed, in PA 2. • - along Olivenhain Road, it is likely that this area would be unusable for
development purposes. - - The full development of PA 3 would require the development of a Streambed Alteration -
2. On the south side of the Creek, the area could potentially be developed an
- Agreement with the California Department of Fish and Game, but would not requite individual proposed provided similar buffering as recommended for PA 3 were
accomplished and runoff were shunted to the same or a similar nuisance water permitting through the Corps of Engineers. The full development of PA 4 would require both treatment system as proposed for PA I and/or PA 3.
the development of a Streambed Alteration Agreement and a Section 404 permit. Scaled back 3. All grading of the site should be conducted between April IS and October IS.
Temporary desiltation basins and standard Construction sedimentation development may reduce the permitting requirements for this Planning Area. measures should be implemented to prevent runoff from transporting
sediments from the site during construction. Exposed slope cuts should be
immediately reseeded witha suitable erosion controlground cover after -
completion of grading ciforts. Long-term sedimentation impacts should be ALTERNATIVE PROJECT addressed by ensuring slope stability, adequate slope drainage systems are -
utilized, and effective revegetation of exposed slopes is completed. An altemat ye to the proposed project has been submitted which calls for no changes to
RESiDUAL IMPACTS the land use elements or project level amenities with the exception of the elimination of a
With the incorporation of themeasures outlined above and those iJentilied in the SP text cribwall on PA I and the extension of graded slopes Into the proposed Chaparral-dominated open
and figures, the biological impacts of development in PA 4 would be adequately mitigated to a
- space slopes located in PA 1 and PA 2. The slope grading would increase the Coastal Mixed
less than significant level. Chaparral impacts of the PA I project to 2.6 acres and would almost double the impact over.thal
... ..,._ .,._ ......._..s...:.. ,.... .-,f I.... ............................- . Ile proposed with a crib wait acres). inc impacts wuuiu aiu saia uw
for the entire specific plan by a moderate amount, which would result in a greater loss of
Chaparral habitat than that being preserved (10.8 acres, 50.5 percent). This would exceed the
$8 0912J/92- $9 0w23192
--
sus iss PSBS nh
50 percent preservation level and %%ould, therefore be considered signi(kani fins alternative LITERATURE CITED .
is not preferred from a biological standpoint Mitigation would, be the return to a crib wall American Ornithologists Union 1983 Check list of North American Birds 6th Edition
American Ornithologists Union
design or pulling back an equivalent degree front the top of the slope. In either case, fencing
American Ornithologists' Union. 1989. Thirty-seventh Supplement to the American
and buffer requirements such as those identified in the preceding alternative analyses would be Ornithologists' Union Check-list of North American Birds. Auk 106: 532-538.
required. .. Ashton, R. E., Jr. 1976. Endangered and Threatened Amphibians and Reptiles in the United
States. Soc. for the Study of Amphibians and Reptilcs Herpetology Circular No. 5.
Atwood I L 1990 Status Review of the California Gnatcatcher (Polsopulo calq.fonilca)
Unpublished Technical Report Manomet Bird Observatory. Manomel Massachusetts
79 pp
Beauchamp K M 1986 A Flora of San Diego County California Sweetwater River Press
Nat onal City, CA.. 241pp.
Bond Suzanne I 1977 An Annotated List of the Mammals of San Diego County California
Transactions of the San Diego Society of Natural History 18(14) 230-247
Bowman Roy .H. 1973 Soil Survey San Diego Area..California U.S.. Department of
Agriculture. December. 1973
Bury B 1971 Status Report on California's Threatened Amphibians and Reptiles California
Department of Fish and Game Inland Fisheries Administrative Report No 72-2.
California Department of Fish & Game 1,977..Status Designations of California Plants and
Animals
California Department of Fish and Game 1988 Annual Report on the Status of California
Slats Listed Threatened and Endangered Plants and Animals
California Department of Fish and Game. 1989. 1988 Annual Report on the Status of
California's State Listed Threatened and Endangered Plants and Animals
California Department of Fish and Game 1990a 1989 Annual Report on the Status of
California's State Listed Threatened and Endangered Plants and Animals. State of
California, The Resources Agency, Department of Fish and Game.
California Department of Fish and Game 1990b Special Animals April 1990
California Department of Fish and Game. 1991a. State and Federal Endangered and
Threatened Animals of California. Revised April 1991.
California Department of Fish and Game.. 1991b. 1990 Annual Report on the Status of the
California's State Listed Threatened and Endangered Plants and Animals. March 1991.
California Department of Fish and Game 1991c State and Federal Endangered and
Threatened Animals of California Revised April 1991
0943192 60 0943191 61
-"I
- - - - H -
- PSBSS$4$
/
California Department of Fish and (lame, 1991d. Special Animals. California Natural
Diversity Data Base. August 1991.
Collins, Joseph T. 1990. Standard Common and Current Scientific Names for North American
Amphibians and Reptiles (3rd ed.). The Society (or the Study of Amphibians and
Reptiles. Herpetological Circular No. 19
Convention on International Trade in Endangered Species of. Wild Fauna and Flora (CITES).
1976.
Everett, W. T. 1979. Threatened, Declining and Sensitive Bird Species in San Diego County,-,
Audubon Society Sketches July 1979 2-3
Graham, Frank, Jr. 1990. 2001: Birds That Won't Be With Us. - American Birds 44(5). -
Winter, 1990.
Gray, John. and David Bamlet. 1991.1 Species of Special Inteicst Natural Resources
Geographic Information System (GIS) Pfoject. Prepared for the-County of Orange
Environmental Management Agency. Santa Ana California August 1991
Holland Robert F 1986 Preltminary Descriptions of the Terrestrial Natural Communities of
California.California Department of Fish and Game:
International Union for the Conservation of Nature and Natural Resources. 19791 Red Data
Book. Vol. 3: Amphibia and Replilia. - -
Jameson, E.W., Jr. and Hans). Porters. 1988. -California Mammals. University of California . -.
Press.
Mooney, Brian F. and Associates. 1992. Final Environmental Impact Report for Olivenhain
Road Widening/ReAlignment and Flood Control Project. Prepared for City of Encinitas.
- January, 1992.
Munz, P. A. 1974. A flora of Southern California. University of California Press. Berkeley.
1086pp.
Pacific Southwest Biological Services, Inc. 1989 A-Report of the Biological Resources on the :
.
42.3 Acre Swallowtail Property (or Scott Englehorn & Associates. 2 February 1989.
Pacific Southwest Biological Services, Inc. 1991. Report of a Biological Assessment of the
84.0 Acre Leaucadia Highlands Site. Prepared for Coleman Planning Group. 9 April.
1991., ., . .. .
Regional Environmental Consultants (RECON). 19853. Draft Environmental Impact Report
- - (or.thc HPI Olivenhain Property. -
Regional Environmental Consultants (RECON). 1985b. Draft Environmental Impact Report -
for the Sco*ta Property.
09f33191 62 -
Regional Environmental Consultants (RECON). 1986. Final Environmental Impact Report for
the Pearce Olivenhain Property.. July 30. 1986.
.Remsen, J. V. • .11. 1980. Bird Species of Special Concern in California. California
Department of Fish and Game. Sacramento. California. 54pp.
Rogers, Thomas H. 1973. Geologic Map of California. Santa Ana Sheet. California Division
of Mines and Geology, Sacramento, California.
San Diego Herpetological Society. 1980. Survey and Status of Endangered and Threatened
Species of Reptiles Natively Occurring in San Diego County.
San Diego Non-Game Wildlife Subcommittee. 1976. Proposed List of Species and Habitats
Requiring Special Protection and Study in San Diego County. Memorandum to San
Diego County Environmental Quality Division. .
Smith.-James Paynei and Ken Berg. 1988; California Native Plant Sociely's Inventory of Raze
and Endangered Vascular Plant of California Fourth Edition Spec. pec Publ No I
September 1988
Stewart 0 R 1971 Rare Endangered and Depleted Amphibians and Reptiles in California
herpetology, 5: 29-31.
Tate James Jr 1986 The Blue List for 1986 American Birds 40(2):227-236.
U.S.' Fish and Wildlife Service. 1986. Endangered and Threatened Wildlife and Plants. Code
of Fed. Regul. Title 50, Part 17.11 and 17.12 (revised January .1, 1986).
U.S. Fish and Wildlife Service. 1989. Endangered and Threatened Wildlife and Plants.
- Federal Register Pan IV, January 6. 1989. -
U.S. Fish and Wildlife Service. 1991. Endangered and Threatened Wildlife and Plants; Animal
Candidate Review for Listing as Endangered or Threatened Species, Proposed Rule. 50
CFR Part 17. 'Federal Register Part VIII, November 21, 1991.
Unitt P 1984 The Birds of San Diego County San Diego Soc. Nat lust Memoir No
13.
- Williams. Daniel F. 1986. Mammalian Species of Special Concern in- California. Wildlife
Management Division Administrative Report 86-I. California Department of Fish and
Game. June 1986.
O12319i . 63
0 . -
- ;. - -- - -- -.-. -- -- -- .- T -- -- .-- -- :-- -
PSBS 1843 PSBS 8815 -
APPE.DIX I Fi.o.u5 CuEclu.ur OF TIlE 1I0'l&. DEPOT SITE APPENDIX I FLORAL CHECKLIST OF THE HOME DEPOT SITE (CONTINUED)
HABITAT C - Soutbiro Mix -J Cli patral D - Ducguo Se Scrub II
AIUUCtii* Suflo*Ct Family (continued)
BrLA1
H - Salt HemP W - SouthernWillow Scrub -
X - Disturbed Field F F,evhwuicr/BtackiiltMarvb Er opIiyliwv co rv(flon.m (D.C.)Gray. vu. co,jtnf/lurwv Ooldca.Yenow -. Gnuphalium bicolor Bioletti. Bicolor Cudveed
D. C
C
hABITAT Gnuphaliwv Iiacu-ajbw,, D.C. California Everlasting M
Ha.wdia :qvarroia (H. & A.)Oruene up. g,iwictiolda (D.C.)Clart. Siwtuotb Goljenbuib X. D
CRYPTOGAMS . - !lcmftenlafaicicvlwJ (D.C.)T.& G. Fucicicd Taiwued . C. D-
. . • I6tsrosAsce grandL/Iora lIMO. Telegraph Wood X
FERN bocwr.a wneta (H.K.B.)Qreeoc vat. /otfuraccu (0rcenc)Beaucbatnp. Spreading 0olderabuah . X. D
-. -
Picris ecf,IoWu L Bristly Oviongue F
Aspidiame ' odurasa Caw. Marsh Fleabana H F W
Dryopeei'ü o'giaa (Kautf )Wau Ceat4 Woudlem c ilybwn nia,iaw,, (L.)0acrta. ).lilk-diigili X. D
5 S 0SvncAus okracte, L. Common Sow-Thistle X. D
S4ephoJnuntta diagonals Gottlieb. San Diego Wreath Plant X
GYI iLt.OSPERMS Xa,uhlun, ssrumarlw,t vu civtnd,'ue (1,611.)T.& 0 Cocklebur F
Pinaceas
Pines iacr.yana Fairy . Cars.•, Bongo Family -
4nuMcLia Murmcdia F.& N Rancher's Fidileneck C
- Hdiotropl ant crvvusa4cw.s war ocidaiw, (Hellerjdta 341 llulsuirupe F 1.1
DICOTYLEDONS
Bn&u,c.acesae Mustard Faintly x Brassiestgcokidasg (Dvat )l Ball Mustard Adozacrv. Adoiva Family
Sabamis-wkaan Prod an D.C. Desert Elderberry . - - D. W S - -
- Cacl.acea. . Caciw Family
Opasuiaficvs.frdica (L.)Miller. lnIion.Fig - D
Alzoacmm - Casp.twoed Family . . . Opunila listoratis (Engelm.)Ckll.vu. Vstrsralis Coast Pnckly Pear C
Carpobrolut edadh (L)Bolus HottentoiFig * C. x
S Capnfuliacti* Hooaysuckli Family Anacardiacco. Sumac Family -- Laiilctra :ub:plctua vat. drtu4a1a RchJ. San Diego Honeysuckla C
bfakssnma an lauf (Nuu.)P4uU. as Abrams. Laurcl.Leaf Sums. - c
Rqri/oIM(NatI.)Bevib.&Hook. LcmonaJc.beuy, -. C - Catyophyllnceav Pink Family -
Rites onataWaia. SigubuSh Cardionvra rantoslumma (Wcinm.)Ncla.& Webs. Tread Lightly C
Rites tdioôat vat p o4ulnua Eaglet in D.C. Pubescent Basket Built D
. Tazkodan.drue ,odkwas (L.)Kualae up. ditvrsilubwn (F.& G.)Thorae. - Chenopodiacene . OooicIoot Family S -
-
S Asripici paula up. haunts (L.)Hall. & Cleat. Halberd-Leaf Salibub - f. N
Aplaceas - Cartel Family 4rr(pLa umibaccasa R. Br. Australian Salibuab F. X
Foeicidws 04gw. Hill. Sweet Fennel . x opodIun antbro.rloide.s L. Mcaican.Tea F, H
. - $aaicidj argW4 (T.& OjOroen. I) C1i.nopodluni murals L. Nestic.L.a(0ooaetoot X
Sulicornia subU,minalis PeniS Pariah aGlauwost U
Ailatacta. Sunflower Family Siilicu,iila .frgInic L Psckleweed U
4cawiis .wdcroc.phili D.C. Sacepellute Purplehvodu C Sabola aissratu B Br. Ruuuisi ituttla Ambrosiapulkilat*yii was. &(flwn.co (RyJb )91aSo B p
4,uodui. caiifaer.ko Lean.- California Sagebrush . D - C(ataceae Rock-Rose Family A,tgalslj d eglasinan Bass. in Hook. tIugwost - F Hdio..themwn scopuiwn vat. alde,sosui (Qreene)Muoa. Rush-Rosa C
Aster gulls Eli. Slim Aster Ii
Bacdia,f, pllidaAs up. asAsangalaea (D.C.)C.B.Wol(. Coyote Broth D. X Crvuulaceue . Sionecrop Family - Sacthals ialk(fofta (LP.)Peea. Mule-fit X. w -
leyis*dulls (Nuit.)Morsa. Wits-Fingers e Dwi D
Cs..Saiareo uarliseasis L Tocalote D.
Ouysaneliemw. co,oaaAiu,u L Garland Chrysanthemum
C)rslwn Occfdansafr (Nutt.Iepi. Cobweb Thistle - X Cucurbltaceue . Gourd Family D blaroit macrocaipias (Oreene)Orcene. Munroo*. Wild-Cucumber C
Cøii)T. ciLlod!*SII cfOiiq Huruweod
C'ornh,oDrwftlagMLfulia vu. linMia 1141 (reported) - - C
Corerhtogyr.efluaglalfalia war. iirgusi (Bcnlh.)Ctay. Viratc Cudwccd-Aster - - D
64 0105192 6$
-- - -' ANN . '00 7—M ,'
- PSBSSI4S - . PSBSSB4S
APPENDIX 1. FLORAL CHECKlIsT OF TilE IloslE DEPOT SITE (ctjy(rlywEu) APPENDIX I. FLORAL CllECKLbT OF THE IJOSIE DEPOT SITE (CONUNUED)
Eratuccas Haib Family
-IRBITAT
Ruasaccus Rosa Family
HABITAT'
'.4raoliahyio, StanduWassp. rn ..usfutia (Jcpa.lWclls Dl hi.., hl.anz.anil.a C I1crcnwnaLa.s a,biufoIIa hi. Roam. Hollywood. Toyon C
Xjtuaoacia, bicolo, Main Mission P.i.uiz.anata C Pot entitle glandaloco Iao4l sap gl.iaadialota Sticky Cinquefoil C
Euphorbaiiccae Spurge Family Rubi.accii. Madder Family
Crows, cat jocakia hluail Mg tar . .t,fornacsa D Galiwa nnduwjh Only up andreizit Mosa Badsiraw C
Eren.oiaaipsia iaigorlat (Houk.)Bcaib. DuvcsscrJ . D
Kulascias -'Rue Family
Fabagias Poe Family Cneurjdiur,, dwno,anu (Null )lluuk Coast Spice Bush C
Luau, acopanus (Null. in Ta C }Oial sap a upiarasu Coasi I 0 arwa .1 0 X
huh lseu, elbus Dow. While Swirl Clover F. W. X Salicacciac- Willow Family - -
LiEu lauaokpu vu brarebmw Ball Hucciia sWillow F W X
Faqjscmis - Oak Family , Sol is goodJingil Black Willow ' ' W
Quercus agrfuh.a Mac vu agrafaalaj Coos Live Oak C
Q crow dw,so,a Nuts Scrub Oak C Sropbulailsccaa Figwort Family
Co,dy1a uhais ,lgldiu Null is Bulb Dark op Bird a Ocak D.
FranLenl.acciae Diplacur panics.0 Null as Taylor. Cosa Bush tsloakoyflowar C
Frwihaia ,ejis.a lie Alkaia Hgaib II
Sulanaceac Nightshade Family
Guasu.scaa. Geranium Family Dsuara wdghni kqal Wcaaasn iimsonwcad D. X W
E,aj,sm boars (Ca.. )Bsttol Long L4 Fal t a 0 - Nicoslana j"ca Grab True Tobacco W X
E,odaan. dcsswhaa (L )L Hi, Red sun Filaira 0 Suiw. an, parlshit Hcllcr Parish's Nlghtsltadc -. C
Leodaw,, moichasw,, (L)L Hag %sbalc lam Fal rca D
Lasnuaceaa Mini Family MONOCOTYLEDONS
Waiam aalger. I.. NshJ
£aisiaapiasa Japi. While Salo .-. D Agevaceas - Agsv. Family
C Sat go aselljrsa Graeae. Black Saia C Yucca schidigere Road as Oflktoz Mojave Yucca
IIlalvàccias -Mallow Family Cyperacciie - Sedge Family
h1a1acoahaeiausfoacidoiaa (Nuui.)G,ccna var. fsucksl,i,au Mesa Buabmalluw - C . ficocharu maciosaachye Bnu. in Small. Pals Spika-Sodg .. F
Mahvlla Saprosa (Oct )Kzspov Allah hI Ilow t X 14 - $ lips, ca41ora1w5 (C A Iley )Slcudal California Bulrush, F W
Scirpus robassu, Furth. Prune Bulrush F W
Onagraceac Evening-Primcaae Family .
Ocn,othg,a eiaasa H.B.K. up. hlr,wuiim,, (Gray an W.a14.)DacuiLb. Grail Marsh Evaaaag.Pnmsou W. F. ,x Ulsaccac- Lily Family .
Catochomas wscsiag Wood Vol.seethi Wiad a Manposi Lily C
Pualygonaccaa Buckwheat Family
Enogosuam dai44.soaii Grecac Os usloun a Bacdcasbcat 0 junciaccas Rush Family
£rlaagoauarafasdcuulwan, Beath. asp. fassliahuwn FliI.Iup buksbcol D . Janci.s ocaos L. up. lcopoldil Engalm. Soulhwsalgrn Spiny Rush F. W
RWaU (7'Jpus L Curly Duck - F. W Jaancau mgxic.ania, WillJ. Mexican Rash .
. F
Pflmuiaccas Pnmroa. Family Puacczae Grue family
.4nagalLis encasls L Scarlet Pimpernel ' W. D - Awna ba,bwa L Slcaudc: Oat X. D
* Broalus dlandnas Roth. Ripguz Gnu - - - X
Rhiamnacea. - Bucktboae Family '- Bran. ass molts, L. Soft Qicsu X. D
Ceaaochut toinealosat asp. oh sates, (icpa.)Monz. Ramuna-l.il.ac - C - &onius nibe,u L. Rid Brome - . - X. D
Caanoghig, vamacosuaz Nazi. in T. & 0. Cowl Whilalilut c - . Coew4rrtaJa1to.sa (Lem.)Slapf. Pampas Ocaw C. W.X .
Rhanunus caljoraka lap. tornemislia (Banth.)C.B. Wtsl(. Chaparral Coffcobcny - C . Di'ikhhs spicaso (L.)Grcaac. Coastal Salt Grass W. M. F. X
&hw,aaag cnacea Nod: in T. hi 0. Spiny ftcdbcrry o - Elymus cor.dc,uasv, Pgcsd. Giant Rye S C
Gascrtdtaam uen:dcosum (Oouan)Schun& & Ti. II N111,raas D
a Macdawn niannwa, L up kpors:,un. (Lank)Ac sag Hire Bailey H
Ou2l9l 66 09,wvz 67
.: - -- -
- PSliS 084$ -- PSBS IsIS
APPENDLc 1 Fi.oa.u. CHECKLIcI OF TIlE IlO%iE DEPOT SITE (o'rnnui) APPENDIX 2 ANL'IALS OBSERVED OR D&TWILD 04 THE IIO%IE DEPOT'SflE
HABITAT HABITAT C - Suutbern Iliacd Cbap3n1
ftacric - Oaa. Family (cociiouad) 0 - Disturbed -FialJ
bidica inperfeoa Trial. Coast RaAg. MeW C F - Flyover
Potçogoa auo rpdltniii (L.)Dcsl. Annual BcJia. F W Al - Fcr.gwazctlBrackiils Marsh -
Supa coronaza Tbuib. in West. Giant SUp4 C S - Diegao Saga Scrub -
SdpakpidaHitcbc. Foo4hsillP4ccdIcg,aaa - • C W -Southern Willow Scrub -
S - - • - IC - Salt 16f4r5b
Tjphuceae - Cat -Tail Family
YP.'W kmifutia l Soft Flag W Previously upoiliaJ on-alto (RECON 1955)
- - 0 - Observed on-site by Claude Edwards. $991
Denotes oo 0i99 plant Use HUaInLI/ftIW(S
CO%l%ION NAME SclL\11i1C NiIF OF DETtCIION I4A1tTAT
AMPHIBIANS
- hI>Iidue (T,cc(rogs and kolut,vga)
Pacific Chorus Flag Pscadacrs: regilla calls 161.W
Rinldje (rca. Fcogs)
Bullfrog Rana. catesbesasa calls 9.4
REr11LE
lguanld.se (Iguansda)
Wcaicns Foitca Lizard 5celuporian occidentatis .- $ - C;D,S.W
$ssk btolcbod bwd lisa ::asuburlana $ C 0 S
Sclndd.ie (Skinki) W Coronado Skuik Ewnecu s*IliosInauz buuspwlesalis I
- -: Cohubridias (Colubrida) -
- Common Kisigsssako Lantpropelli griahii -I - 015
-I
BIRDS
Ardoid.se (Herons and Bsu tins)
Groat Egret Csusnerodissi islba.s
Grail BIts. heron ArJg i lurudssu I M
-. Ore nbacked heron Bsszuride, ssriaua 'M/W
Acdpllrldae (Hawks Old World Vulture, and llarncrs)
- Sha-shinned Hawk Aip1ietszasus •- • I C
Red-ukouldere4 Hawk Ba:ro lineivaj I FM
. - Red-tailed Hawk Burro Ja,ssticrnzlz i F
- Falconidse (Caracaraa and Falcons) - P1W Amencan Kestrel Fairs, sparwrlas I
I-
09123592 . - - 0911.1192 69 • • -
I
• S
-
PSBS 181$ : PSSS 164$
Anzlx 2. AMIAiS OasERvEft Ok DL'TECTIt) tis thE hOME D<)T SITE (CON11MJED) APPEI(DIX 2. ANIMALS OBSERVED OK DEltcrED ON THE hOME DEPOT SITE (cw(nMJED)
- suhS Nu,KThIs
CoI%IoN Nuc Sciinc Ni or DnnO lIagmT - COMMON ftiE SCiL%T111C r4Ir OE DEItCflOM ILIAT
Pirnidi. (Quails. Pbeuaanu. unJ K.liivw) Troglud1tidne(Wsciu)
Cli(ou Quail C.illipvpl.i cd1/u,ahO >30 C,D.S Bcwi.k* Wscu Thryvinana kuh&iI 6 C.S
House Wren TwIud)sa .ieJn 2 W
V Charadriidae (Plovura end kclalivc.) V
Killlect Cha,.id,iui ,qfrfl 4 D.F Mucicapidse (Old World Wwblcra. Gnai.aichca. kin8kls, Thrushca, Bluebirds, and Wrcli•)
Blue-gray Goaicaicbcr Puliupti&i CUC,CIeO $ V W
Linda. (Cviii and Terse) V California Gnalcut..bcr Potiup:11.i cu4furiica I pair C.D.S
Weakru Gull L,i,v, in.jdg,u.ilii 2 F Wrialit Ch.uuaeafa.t1ata 6 C.D,S.W
California Gull - Laces c,ul.fur.,i.-os 6 F
• V ?.liznldae (Mockiallbitds and Thrashers)
Colwnbids. (Pigeons and Doacu) V Northern Mockingbird AIiv.v.s polygiunos 2 D.S
Mousasag Dow. Zen,iiJa ,a.iflue,o 29 C.D,S.W California Tbnsbue Tuwzius,,a ,eJ,ein.m 4 C
Cuculidae (Typical CiacLoos) V.- Larusda. (Sbñkca)
- V G:eaigg Ro.jnsnàgt Gracuc.)-s n. calif •V 3 c.s Loggerbead Sbsika La,ioj Iado,icssays I D
Troctillida. (Hummingbirds) Siurnidse (Starlings)
Anasi Hucucuiagbi,J Calyp:ewrna 7 C,D.S.W V European Sinning S,urcuu iiü - 4
Couiui Hucucuingbi,d Calypne cotta. I p •
Emberinda. (Warblers. Sparrows. Blackbirds and Rclosswea)
Alcedinidsg (Kingfieticn) Ynllàw-nw.pud Warbler Dendi-uica oorvnrulo 2 W
Belied Kinguiab.e Cv,)te,,t,)Vo.s I F yellowbrcus.ted Chat hieriasue.0 V
W
- Coasmo* Yullowilssoms Geothlypi, t,idsus 30 D.M.W
vida. (Woodpack.n and Wi7osck.) V
V
V Black-beaded Grosbeak Pheacsi,os mel,rnuceph,IIIU V 3 V
Nullaila Woodpecker, V PlC0 i.I,s .iwi.ilhi 2 w - Rufous-sided Towbe. ?npito ,rrhrophnIsatniva 6 C.D.S,W
V V Downy Woodp.ck.e PicuiJa pubucena V I W. California Towhee .-. Pipito uncn-alu V IS C.D,S,W V
V
- Non Flicker Culaptu CarOlyn I W V SOOg Sparrow Metnnspha melodia >50 D.M,W
• Lincolau Sparrow Bleluspiza iincoLiil 10 W
V 1r,rinnlda. (lyrinVl Flycalcb.n) V - . - GoI crowned Sparrow Zunu,,kh!a asricapilla $ C
Paci6calop. Plyciiebei fmpiJorsas dj#4414 I W WbiI4-crowncd Sparrow Zuno:,ichla frucophrys V Ii CAW V
Western Wood Paw.. Coniopes sordiJul.0 W Red-winged Blackbird AStlaiuOrphat'SiCtus MW
Black PlaoAe £-orn,, uign.-uns 7 W Brow.,.. Blackbird Eupha'as eyaaoccph ales S D,M.W V
W""m Kingbicd TyraAnut 5V(flj5.j, • Western Meadowlark Sjunrnella neglena S OW
Soulbwicrn Willow Flycalcbg, (rnpiJ.rnar trjljjujmuj - V V Brown-beaded Cowbird Blulu:hru.r aid 7 D.W
V V Hooded Oeiole Icier.., cacail.uuj - V 3 DW
Corvids. (leyt, Mugpioa, and Crow.) Northern Oriole Icurser gslb.da 5 V W V
Scrub Jay Apkelocurna cuarulwce,u 9 C.D.S.W V V V V
A.aierican Ceow Corn., brachyrhpidus Is, o Fnngiltidse (Finches)
Common Raven V Con-es corns 2 V 0 V House Finch Carposlacus mesha,n.t 50 C.D.F.S.M.W
V Leaner Goldfinch Curdadispsaliria $2 C,D,S.W
Aegilb.sladaa (Bsaalslil) V Amcnc-an Goldfinch Cardueli: 1,1,11: I W V
Buabsit Pral:rip,stasrnini,nes >50 C,D.S,W V V V
V V Passciidac (Weaver Finches) V V
- Hirundsnidae (Swallow.) V House Sparrow Pnis:udon.es:icuj 4 S
Tree Swallow T.I.Jsyt-iH.-OI bit-ut or I F - V
Nosibca Rough-winged Swallow Sselgidup:erpserrip.ani, V 2 F V
-
Cliff Swallow llira,.do pyrrhst,s - $3 F
70 V
V
-
V 09f13192 V 71 V
VVVI
-_ .• - - . - -_ - : " -
-
P583 114$ - V - PSBS 184$
APPENDIX 2. AmuiS OBSERVED OR DrrwrEo ON THE HOME DEPOT SITE (Cwin.\uw) S ppuwx 3. Pi.xr SERsmvny GuloELirS
0 V
Coiio's Nuts Scic'rni,s. Nsii. or Dmcno's lLarrAT I) CAuFoRNIA NATIVE PLANT Sociry R ED CODE
MA.%L'L4LS R (R.ontj)
Dideiphida. (Opossums) I Rare. but found in sufficient numbers and distributed widely cnuu8h sit i the potential for
Vstgiws Oponous. 0 J.'IpIsia virgini a Sr 1, W ItlIocliQO or sOiirpaitOfl it low It thin time
Occutococe confined to several populations or to ond etignjed population.
L.po.4da. (Rabbits and Horns) V Occurreoc. licotird to on, or a (ow highly restricted pupulotiocs. or present in such small
Desist Cottontail Syl i&ias au.J bu ii 3 D w numbers that It is seldom reported
Brush Rabbit S;twiiiabark ini 4 CS
E (Endangerment) V
. V Sdutlda. (Squirrels. Chipmunks. .nJ Marmots)
California Ground Squirrel Spermophilul beehg'yi - 4 . C,D.W 1 Not esdungcred V V
- 2 Endangercd in $ portion of its tongs -
Gyldu(Pockat Gophers) - V V V 3 Endangered throughout it. ring.
Bolts. Pocket Gopher Thm-nomys butsai V digging, W D (Distribution)
H,otrumpdu(Pocka Mouse and bSOO$ItOO Rats) )
5.3 Ditto Pocket blots.. Otarwiispiu (Perugnothua)fuI4u/ali.0 2 D I Mo:. or less widespread ositaid. California
2 Ram outside California
Sturidae (8.115 ..ice and voles) 3 Endemic to California ..
Cactus Moss.. Perumysi S -us 3 1 D
Door Maui. __V Perotijs us ijur icus List 2 Plants two or endangered in California but more common ctscwbeic -
Dusky-footed Woodsis AeAs c I-i.. 3: Plants about which we need mar. information V
V List 4 Plants of hauled dtitnbuiioa (switch list) V
Canida. (Foxes. Wolves. and Rolali.cs)
V
V
cw Canis haram c S W 2) CALIFORNIA DEPARmIE?tr OF Flsu AND GAME LlsltD PLANTS
Gray Faa Urocyon I1,iercuI,SeAirUI - scat. tn.k.t W V
V - CE - Suite listed, endangered CR - State listed. rig.
Procyonida. (Pni and Relatisra) V
V
Raccoo. Pro.yon bw, irs La W 3) FEDERAL CANDIDATES AND FEDERALLY LISTED PLANTS
- FE - Federally listed, endangered
- 5 F1' - Federally listed, threatened
- Cl Enough data at. on Ille to support the federal listing -
- V V S Cl'- Enougb data ass on Elo to support federal listing, but the plant is presumed sound
V
V•
V
- C2 - Threat and/or ditinbuuion- data am insufficient to support ted.,.) listing
C2'- flss.as and/or distribution data an insufficient to support fader.) huurg;planl priaunscd .atinc*
C3a- Extinct
C3b.. Taxonomically invalid V
-
C3c- Too widaprcad .34/or not threatened —
4) LOCAL DESIGNAnONS
Following some CNPS R £ D Codes and List 2 3 or 4 citations may be additional .unihesi in
parenthesis. Thai. numbers represent proposed change. to CNPS listings by botanist Craig W Resist
V - which more accurately toflect statu, hued on all available information. They ass preseied in bii
- S manuscript Rare and Sensitive Plants of San Diego County now awaiting final review and publication.
00523692 72 os,wu 73
V
V
V
iVVVV V
V •VVVV
- i_ : -- .- --
- PSBS 0645
Al'PLNUIx 4. ANIt.RL SislnviTv l.lit'lN(5
I) Loc.u. SEmvrrY LlllN.s (S. DIL.0 Cutriiv)
San Duqu llcrpetslsgkai Society 4DllS)
Ttsatcne.J Spo.ies or ioubipecits whu.li have drsmaui..ally d.ueluned and could pulcolially rca.b the
- Inset of cndsngescd. -
EnJangcsoj Species whub sic an inuejisic J.ancr or eniuquuiva in all or uujur parts of their
flogs.
San Diego Non.Caan. Wild ifiSub -umuniits,e (SDNCWS)
Sensitive Species . Species cearsaniung special concern and protection; maybe recoi5uncndoi lot
fudtucrsrudy.
Evustt (1979), Threatened Declining and Ssnaiiiie Bird Species in San Dingo County (Audubon Sketches)
Thsc.aicoad - - Species us ash pecucs sahuji has's unJergone drainiiic ooCyclial, long-term duchess
thtou,luu i thciq rane
--Declining- Species w-b.au local Weeding p..upualauuuns have been cte.sdily eaducud or extirpated.
Seeaitsv. Spocia %h- papal lions sue of high concem for various neaaoas
2) STATE LEVEL SIJItSmVITV (CALl1oR.'l.)
Suciely for lisa Study of Atuph bisusa and Reptiles (Aslttuiu. 197)
Endangered Species sat .ubpecia whu5h has been sndusted throughout their sings to such an anieni
IbiS bncsoiung -pcsputauiona sue nnoll or vulneribla to enuirpatiun within the Dais 1050
2$ years. -
Threatened - Species whih are prcsens in a scull podiuis of their Ioer range.
California Department of flab and Caine (Reniarsi. 1980)
Birds of Special Concern - Species abuse California breeding populations have severely declined
or ate in vulnciable positions.
California Departsnenl of Flab and Caine Listed Animals
SE - State listed endcsgercd apsuiss
SR - Stats listed mare qarsies
CP - Calitornai MI7 prmaurctad species
PSOS 18-IS
APPENDIX 4. ANIMAL SI:NslTlvtTv LIsiiNtS (coNINUED)
NTiOu.U. LEVEL SENsrnvlTv 0 -
BL .- Species listed in Audubon'u Blue List (Tate. 1986) whose populations have suffered dramatic
declines in portions 'of their national mange.
FEDERAL LEVEL SLsrnvITv
- 65 Bureau of Land Management Sensiliva Species
FS - U.S. Forest Service Sensitive Specks
Fedrr4 Candidates and Federally Listed Animals (USFWS)
FE - Federally listed. endangered
Fr - Federully-lismud, threatened
Cl - Enough data ate on tile to aupponi the Inlet-cl listing
Cl - Enough data are on tile to support federal lusting but the spoics is presumed dud
C2 - Threat and/or distribution data ice in uflu sent to support federal lusting
C2- Threat anJ/r distribution data are insufficient to napped federal timing; species prmasoaesl
cii Act -
C3u- Echoes
C3b- Tunoomiesily, invalid
C3c- Too widespread and/or out lhrestencd
COMM - 74 09f23/92 -7$
DEPARTMENT OF THE ARMY OI uatLa2 OITCT. CO % OF CIsIS PG. .01 iret O 0 CAWOIIA
August 28, 1992'
ATfWgn*K CO. Office of the Chief Regulatory Branch
Rome Depot
- c/o consultants Collaborative
570 Rancheros Drive,. Suite 20?. San Marcos, California 92069
Gentlemen;
-
This is in reply. to. your application ('
N
o
.
92-45 -.EW) dated April 16, •1992 for a Department of, the Army Permit 0 construct a Some Depot supply, store, impacting 3.0 acres of w.t1*nd.e, adjacent to Otiv.xbain ad, east 'of El Camino Real th Encinitas Creek, City of Encinitas, San Diego County, CaiLforia.
Regulations for our permit program, published in the Federal Register, include Part 330 — Nationwide Permits (see the enclosure). The Corps of Engineers has determined that your proposed activity complies, with the ter
m
s
a
n
d
c
o
n
d
i
t
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o
n
s
of the nationwide permit at 33 CERPaxt 330.5(a) (26) for dicba.rges of. dredged. or fill material intà waters of the United Spates, including wetlands, that are located above t
h
e
b
a
a
d
w
t
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r
s
or are isolated -waters and which would cause the: loss or substantial. adverse modification of one to 10 acres of such vates
Ax long as you comply with the nationwide permit conditions described in Part 330, Appendix A (C) and -the attached special conditions an individual permit is not required. This letter of verification is valid for a period not to exceed two I years unless the nationwide permit is modified, reissued, or revoked before
that time. It is incumbent upon you to remain infored of changes to the nationwide permits.
A nationwide permit doàs not grant any property ights or exclusive privileges. Also, it does not authorize any injury to the property or rights of others or authorize iuterfrence with any existing or proposed Federal project. F
u
r
t
h
e
r
m
o
r
e
,
i
t
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o
e
s
not obviate the need to obtain other Federal, state, or local- authorizations required by law. .
-
-
I SPECIAL CONDITIONS. FOR 92-459-W
1. That the parmittee shall create 0.7 acre woodland, enhance 1.0 acre of freshwater marsh, acres of willow woodland.
2 • The permittee shall remove non-nativ* ape existing wetland as part of the enhancement plan.
willow enhance. 2 • 2
from the
Thárs shall be a mthim*a 50' biological buffer. A 1508 planning. buffer shall incorporate the Sol-100 1 biolçgical buffer and 50' of unstructured paved area in the parking lãt.
Fencing shall be placed on the site, to separate the project from the wetland area.
The permittea shall place oil, interceptors in the paved areas to collect urban runoff and will create a total of 05 acre of nuisance water treatment wetlands as described in the Ucn. Depot Specific Plan Proposed Water Treatment Wetlands". :The, permittee shall, place native barrier, plants around the ponds. Uaintenance to the treatment ponds shall only occur lance a year and shall only result in the removal of one-third of the Vegetation.
M1tenanca and monitoring effort shall be conducted for 5 years. Monitoring efforts shall be conducted at tha following intervals: 3, 6, 9, 12, 36, 48, and 60 mànths. Moritoring reports aba-il be prepared within 30 days of each monitoring. effort, and submitted to the Corps, U.S. Fish and Wild1ife Service and the California Department of Fish and Caine. If mitigation fails to meet the success criteria r.viovd and approved by the Corps, at the and of the 5 year period* maintenance and monitoring efforts shall continua until these
criteria are mat, or until the Carps and resource agencies dater'i1ne appropriate modifications to the mitigation plan.
Release of the performance bond, posted with! the City of Encinitas shall be contingent upon the successful coo lotion of the mitigation plan, as determined jointly by the Corps, Service, CDF&G and the cit'jr of Encinitas. The permittee shal submit concurrence by the City of Encinitas an the above mentioned condition, or shall post a separate bond with the COfPS of
I control features shall be installed to prevent transport of sediment to downstream wetlands.
I
I.
Lit
1
P 08;31.92 09:59 VOLO 471 2393 CCI RECYCLE 2000 : If you have any questions please contact Elizabeth White 'of
I
My staff. at: (619) 455-9422.
Sincerely,
Bruce - Handarson
- I
r Acting CLief, South Section Enclosure '
I . J.
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I
RIPtY TO
ATTENTION OF
Office of the Chief
Regulatory Branch
Home Depot
c/o Consultants Collaborative
570 Rancheros Drive, Suite 201
San Marcos, California 92069
Gentlemen:
This is in reply to your application (No. 91-354-EW) dated
April 16, 1991 for a Department of the Army Permit to conduct
grading and filling to construct a Home Depot builders supply store
adjacent to Olivenhain Road, east of El Camino Real in Encinitas.
Creek, City of Encinitas, San Diego County, California.
Regulations for our permit program, published in the Federal
Register, include Part 330 - Nationwide Permits (see the
enclosure). The Corps of Engineers has determined that your
proposed activity complies with the terms and conditions of the.
nationwide permit at Part 330.5(a) (26) for discharges of dredged or
fill material into waters of the United States, including wetlands,
that are located above the. headwaters or are isolated waters and
which would cause the loss or substantial adverse modification of
one to 10 acres of such waters.
As long as you comply with the nationwide permit conditions
described in Part 330.5(b) and the attached special conditions an
individual permit is not required. This letter of verification is
valid until the nationwide permit is modified, reissued, or
revoked. All the nationwide permits are scheduled to be modified,
reissued or revoked prior to 13 January 1992. It is incumbent upon
you to remain informed of changes to the nationwide permits. We
will issue a public notice if you commence or are under contract to
commence this activity before the date the nationwide permit is
modified or revoked, you will have twelve months from the date of
the modification or revocation to complete the activity under the
present terms and conditions of this nationwide permit.
A nationwide permit does not grant any property rights or
exclusive privileges. Also, it does not authorize any injury to
the property or rights of others or authorize interference with any
existing or proposed Federal project. Furthermore, it does not
obviate the need to obtain other Federal, state, or local
authorizations required bylaw.
DEPARTMENT OF THE ARMY
LOS ANCLLLS O,STAICT. CORPS OF ENGINES
P.C. aOl 2711
LOS ANGELES. CALIFORNIA 9000-2=-
July 241 1991
SPECIAL CONDITIONS APPLICABLE TO NATIONWIDE, PERMIT NO. 26 FOR
THE GENERAL PEBMITTEE' S APPLICATION NUMBER 9 1-354-EW
I. That the perinittee, shall create 0.7 acre of willow
woodland, enhance 1.0 acre freshwater marsh, and enhance 2.2 acres
of willow woodland.
The permittee shall remove non-native species from the
existing wetland.
There' shall be a minimum 50' biological buffer. A 150'
planning buffer shall incorporate the 50'-100' biological buffer
and 50' of unstructured paved area in the parking lot.
Fencing shall be placed on the site to separate the
project from the wetland area.,
S. The permittee shall place oil.. intereptors in the paved
areas to collect urban runoff and will create 0.5 acre of nuisance
water treatment wetlands as described in the "Home Depot Specific
Plan Proposed Water Treatment Wetlands".
Maintenance and monitoring efforts shall be conducted for
5 years. Monitoring efforts shall be conducted at the following.
intervals: 3, .6, 9, 12, 36, 48, and 60 months. Monitoring reports
shall be prepared within 30 days. of each monitoring effort, and
annual reports shall be provided to the Corps of Engineers, United
States Fish and Wildlife, Service, and the California Department of
Fish and Game. If mitigation fails to meet the success criteria at
the end of the 5 year period, maintenance and monitoring efforts
shall continue until these criteria are met, or until the Corps and
resource agencies determine appropriate modifications to the
mitigation plan.
Release of the performance bond, posted with the City of
Encinitas shall be contingent upon successful completion of the
mitigation plan, as determined jointly by the Corps, Service, CDF&G
and the City of Encinitas.
• •
••
PRELIMINARY DESIGN FOR THE
CONTROL AND TREATMENT OF URBAN RUNOFF
RESULTING FROM THE DEVELOPMENT OF THE
HOME DEPOT COMMERCIAL SiTE.
DISCUSSION:
The Home Depot site is proposed for development at the southeast corner of the El
Camino Real and Olivenhain Road intersection. The site is currently an open field-
which falls gradually toward Encinitas Crek. Encinitas Creek crosses the northerly
end 'of the proposed commercial development. Moderately steep hillsides lie.
southerly of the project site. For the most part these hillsides will remain In a
natural state and will be protected by an open space easement. A small 19 lot
residential development is proposed for the hilltop south the project site. The
configuration of the existing topography, however, is such that virtually none of the'
residential lot drainage will contribute to the storm runoff being considered for
treatment in conjunction with the Home Depot project
Commercial development significantly alters the characteristics of storm runoff. Of
particular concern is the degradation of the storm water quality. Large paved
parking areas collect motor oil and other products associated with automobile usage.
Landscaped areas contribute fertilizers and pesticides. The accumulated impacts of
such contaminants can have a very detrimental affect on downstream water
courses. Other less harmful materials such as silt, sand. and ash tend to be
transported more quickly to natural water courses across the impervious paved
surfaces thereby adding to the problem of siltation of the stream beds and
downstream lagoons.
OBJECTIVES:.
There are two basic objectives to be met The first objective is .to treat the runoff
from the Home Depot site to remove harmful pollutants. The second objective is to
minimize the amount of silt and other solids which. are deposited in Encinitas
Creek as a result of the project development
APPROACH:
Control of silt and other solids is a two-fold problem. The: first occurs during
construction when grading is in process and the ground has been disturbed.
Construction related silt will be controlled through conventional desilting basins
and sandbagging. Also, grading is presently proposed to be performed during the
dryer season of the year.
Long term control of silt and debris from the developed site will be accomplished by
the use of "sand and oil interceptors" in conjunction' with a routine parking lot
maintenance and sweeping program.
I
! Control and treatment of oils, suspended and dissolved solids and other pollutants
will be accomplished through the combined use of the sand and oil interceptors
(oil/water separators) and the creation of water treatment wetland areas. This report
I .will not attempt to describe the vegetation or specific biological operation of the
water treatment wetland. (See attached memo titled "HOME DEPOT SPECIFIC
PLAN PROPOSED WATER TREATMENT WETLANDS PLANT PALETTE".)
I Rather, this report will provide the results of the simplified approach to the
hydrology and hydraulics associated with the preliminary design of the various
urban runoff control and treatment facilities. The dynamics of percolation rates in.
I the wetland treatment detention ponds, and the detention capacity of the sand and
oil interceptor tanks is not incorporated into this preliminary study. Subsequent
detailed design may permit the downsizing of certain of the facilities.
BASIS OF PRELIMINARY DESIGN:
A 2-year 6-hour precipitation storm will be used for the basis of design for the
water treatment wetland detention ponds and the sand and oil interceptor
tanks.
A 100-year 6-hour storm will be used for evaluating peak flows for storm drain
systems and for the evaluation of overflow and/or by-pass. systems.
The sand and oil interceptor tank system will be sized to accommodate the first
10 minutes (first. flush) of the 2-year 6-hour storm.
Storm runoff from the natural hillside south of the Home Depot building will
not be treated but will be collected in a separate drainage system and discharged
through an appropriate energy dissipator into Encinitas Creek.
The "equivalent triangular hydrograph" in Figure I-C-2 of the County of San
Diego Hydrology Manual will be used to evaluate volumes for the sizing of the
interceptors. (See attached "WDROGRAPH" exhibit.)
6 The County of San Diego Hydrology Manual and Design & Procedure Manual
will be used for determining storm runoff. Peak flows will be determined
using the rational method. The attached "DRAINAGE BASINS" exhibits
define the areas of the site studied in this report.
The results of this preliminary evaluation of the storm runoff volumes and flows
are presented in the attached "HOME DEPOT PRELIMINARY DRAINAGE/URBAN
RUNOFF STUDY" tabulation. Typical sections for the sand and oil interceptors and
the water treatment wetland detention ponds are attached for reference. Also
attached are the preliminary design layouts for the two proposed detention ponds
and the storm runoff collection systems.
HOME DEPOT SPECIFIC PLAN
PROPOSED WATER TREATMENT WETLANDS
PLANT PALETTE
Nuisance Water. Treatment Wetlands
Botanical Name Common Name
Juncus mexicanus Mexican Rush
Pluchea odorata Salt-marsh Fleabane
Sdrpus robustus Prairie Bulrush
S. californica California Bulrush
Typha latifolia Soft-flag Cattail
The proposed Nuisance Water Treatment Wetlands as shown in Figs. will
occur at the edge. of the parking lot between the project: development and the
Endnitas Creek Wetland area. As part of the mitigation outlined in the Home
Depot Specific Plan protection of water quality in the. Creek is a major goal.
The Water-Treatment Wetland will be designed to catch and hold water that is
secondarily passed through the parking lot oil interceptor program and to catch high"
flow rainfall directly. Wetland plant species, acting as filtering agents, will be
cultivated from healthy and mature plugs grown under the supervision of a
qualified biologist or nursery person. Replacement of plant material that shows
signs of irreversible degradation will be reinfroduçed on a partial revolving basis to
maintain a constant filtering continuity. The assessments of the project biologist
will determine the lengths of time necessary for plant re-introductions.
To ensure water availability during months of no rainfall or low urban run-off a
water-conserving emitter type irrigation line will be installed to supplement water
facilitating the viability of plant life. The presence of a high ground water table and
proposed low elevation of the Treatment areas will also provide a positive
biological setting /
During the establishment period of the the Wetland Restoration Project and
susbequent Nuisance Water Treatment areas the maintenance is projected at bi-
weekly or as needed assessments according to the judgment of -the project biologist.
Visits will taper to monthly and continue to be performed On an as needed basis for
a period of three years
Joe €
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U1tMTh1(1 OATA p*ffi(IpC OATA L&NUSCAPC AREA OATA hOrn. O.00l C.nlat Floci Area 102.200i Nurnoef l 5t4n0a1d SO*oc* 532 WSU1S Ru1aD041 4.4 04r0.n C4n11q AgeS 20.040.I. Nwno.f of hlnciCsoo.0 Spaces Par" toLzflcs00 0.72 Acres (17.5%) UWTIUm 8Ui1ding I4..gti* 39 ToUl Spaces so Omer Name O.poi viuso. 0.4; Acres 0.cyd.$oacas 10 M0tarcyaa Spaces 10
HOME DEPOT SITE PLAN
The Home Depot
Encinitas, CA A N $
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HOME DEPOT PRELIMINARY DRAINAGE/URBAN RUNOFF STUDY
2-YEAR, 6-HOUR ANALYSIS FOR SIZING WATER TREATMENT WETLAND AND SAND/OIL INTERCEPTOR TANKS.
BASIN AREA COMPOSITE 2-YR 2-YR 2-YR Tc 12 PEAK TOT.VOL. Vp TIME TO 10 MIN 10 MIN -'.10 MIN . AVERAGE
RUNOFF P6 P24 P& FLOW (Viotal) PEAK PEAK VOLUME VOLUME FLOW
. COEFF. P24 (Op) (Ip) FLOW. (V10) - (V10) RATE
(AC) (C) (IN) (IN) (%) (mm) ("/HR) (CFS) (CF) (CF) (MIN) (Q1OP) (CF) (GAL) (GPM) (CFS)
(CFS)
A 3.23 0.9 .1.2 1.9 632%: 5.0 3.16 9.2 . 14,070 .5,276 19.1 4.8 1,441 10,779 1078 2.40
1.2 1.9 63.2% 5.0 3.16 7.7 11,761- 4,410 19.1 4.0 : 1,205 9,010 901 2.00
132 1.85 0.9 1.2 1.9 63.26% 5.0 3.16 5.3 8,059 3,022 19.1 2.8 825 6,174 617 1.37
133 1.69 0.9 . 1.2 . . 1.9 63.2% 5.0 3.16 4.8 7,362 2,761 19.1 2.5 754 5,640 564 1.25
100-YEAfl, 6-HOUR ANALYSIS .
BASIN AREA COMPOSITE 100-YR. 100-YR 100YR Ic HOG PEAK TOT.VOL. Vp TIME TO
RUNOFF P6 P24 P6/ FLOW (Viotal) PEAK
COEFF. P24 (Op) (Ip) •
(AC) (C) (IN) (IN) (%) (mm) ("/HR) (CFS) (CF) (CF) (MIN) •
A 3.23 0.9 2.8 4.5 62.26/o. 5.0 1.38 21.4 32,830 12,311 19.1 • .
81 2.70 0.9 2.8 4.5 62.2% 5.0 7.38 17.9 27,443 10,291 19.1
82 1.85 0.9 - 2.8 4.5 62.2% 5.0 7.38 12:3 18,803 7,051 19.1 -
B3 1.69 -.0.9 2.8 4•5 62.2% 5.0 7.38 11.2 17,177 6,441 19.1 • . . - -
C 4.59 0.9 2.8 • 4.5 62.2% 110.0 4.72 19.5 466653 17,495 29.9 . . -
A US Ti N I
A N S E N JOB M741E 47 EAc/N/7
FEHLMAN
SHEET NO _____________ OF ________________ SCALE
CALCULATED BY ____________________________________ DATE - -.
96C SCAt4I0N t
9j1E 202 CHECKED BY - DATE
SAN OIEGCA 92I21 -
A U S T I N
I4 A N S E N Joe 14ig
FE1LMAN
-G P 0 U P'- 'SHEET NO __________ OF SCALE
CALCULATED BY DATE 29/
00 SC7ANION 00 -
SLATE 202 CHECKED BY ______________________________________ DATE
SAN *GO. CA 92121
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Existing Riparian Woodland
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Restored Willow Wetlands ,,, . Lot 1 / ' •."••" " Open Space U / ---------
Rip-Rap Energy 9.35 Acres
DIssipator :\ ' / // / LII - Emer ency Overflow.'
it spillway cc
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NUIsance Water
.
Water Tfealme'ni Welland
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Oil /Water Separators \ . • Diversion Structure & Inlet 71
)—WeLlanndarY JT
Basin uAhI Water Treatment Pond
SOURCE; THE AUSTIN HANSEN GROUP, 1991
FIGURE
PROPOSED NUISANCE WATER TREATMENT SYSTEM 23-15
BASIN "A" WATER TREATMENT POND
k
AVERAGE FLOWRATE FOR INITIAL .10 MINUTE FIRST FLUSH OF
I
STORM RUNOFF = 1,078 GPM. USE TWO 650 GPM SAND/OIL
INTERCEPTOR TANKS.
TOTAL 2-YEAR, 6-HOUR STORM VOLUME = 14,070 CUBIC
I - .
FEET, OR 521 CUBIC YARDS. CREATE DETENTION POND WITF-
THIS VOLUME.
PROVIDE MARSH TREATMENT PLANT MATERIALS TO TREAT
I CAPTURED STORM RUNOFF. . *
I PROVIDE FILTER BLANKET AND FRENCH DRAINS TO
I >. COLLECT AND DISCHARGE TREATED WATER TO THE
- NATURALWATER COURSE. . .
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