HomeMy WebLinkAbout3151; Palomar Airport Road Widening; Biological Resources Report of the Palomar Airport Road Widening and Associated Roadway Improvements Project; 1987-12-01•it
BIOLOGICAL RESOURCES REPORT
OF THE
PALOMAR AIRPORT ROAD WIDENING
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Prepared for
aty of Carlsbad
2075 Las Pahnas
Carlsbad. CA 92008
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• WESTEC Services, Inc.
11 5510 Morehouse Drive
Prepared by:
TEC Services
) Morehouse I
San Diego, CA 92121
August 1987
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** INTRODUCTION
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m A biological survey of the proposed aUgnment fOT the widening of approximately 1.5 rmles
of Palomar Airport Road was made to determine the flora, fauna, and habitat types found
on the subject property. The foUowing report describes the general distribution and com-
ponent plants of the vegetative associations and discusses wUdUfe habitat resources and
their utiUzation. Particular attention during the survey was given to determining the
presence or absence of significant biological features on or adjacent to the property.
Significant biological features are considered to be: plant or animal species of rare and/or
endangered stams; depleted or declining faunal species; and species and habitat types of
unique OT limited distribution. The biological effects of the proposed road widening are
addressed in this report, and recommendations to reduce identified cffeas are presented
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^ GEOGRAPHICAL LIMITS OF THE STUDY
* The projea area is located east of Interstate 5, along Palomar Airport Road in the City of
* Carlsbad, northwestem San Diego County. Califomia (Figure 1). The proposed align-
ment includes 1.5 mUes from east of Paseo del Norte to approximately 0.5 mile east of
Laurel Tree Road (Figure 2), Canyon de las Encinas Ues duectiy south of Palomar Airport
^ Road, and Palomar Airport Ues to the ncjrtheasL
LAND USE
I*
Palomar Airport Road is currentiy a 2-lane highway. Lands directiy soutii of the existing
*" road and in the northeastem portion of the aUgnment have historicaUy been used for agri-
cultural purposes. Only land in the northwestem part of the aUgnment is currentiy under
«• cultivation. Several utiUty easements occur on or just offsite. Additional offsite land uses
m include agricultural activities to the north, and commercial developments to the east and
_ west.
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TOPOGRAPHY AND SOILS
The existing Palomar Airport Road is an east-west-oriented artery along the northem edge
of the floodplain of Canyon de las Encinas. The road abuts gentiy sloping hills to the
north, while land to the south in the floodplain is relatively flat. Elevation within the
project area ranges from a high of approximately 140 feet above mean sea level (MSL) in
SAN' ONOFRE FALLBROOK
1 WARNER
kSPRINGS
, Lake
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PROJECT LOCATION I ) ^ Wohlford
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m Regional Location of Project
FIGURE
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die northeast to 60 feet above MSL in tiie soutii. An intermittent stream mns tiirough tiie
canyon south of die projea site, although this stteam is diverted underground at one point.
SoUs onsite are primarily of die Las Flores (LeE2), Diablo (DaD). Marina (MIC), Salinas
(ScA). Tujunga (TuB), and Visalia (VaB) series. The first three types are found in upland
areas within the aUgnment. Las Horcs soUs are moderately weU-drained, loamy, fine
sands with a sandy clay subsoU which formed in material weathered from siUceous marine
sandstone. Diablo soUs are weU-drained. deep clays derived from soft, calcareous sand-
stone and shale. Marina soils, which are found on old beach ridges, are excessively
drained, very deep, loamy, coarse sands derived from weakly consolidated to noncoherent
eoUan sand. Salinas. Tujunga, and VisaUa soUs are well-drained clay OT sandy loams
which occur on aUuvial fans and floodplains (USDA 1973). These soUs occur in low-lying
areas of die site, principaUy south of the existing road.
SURVEY METHODS
The site was surveyed on June 10, 1987 by Patricia Gordon-Reedy, Associate Biologist
with WESTEC Services, between the hours of 0900-1400. Weather conditions at the time
of survey consisted of overcast skies, a temperature range of approximately 68° to 73°F,
and a breeze of 0-5 mph. The alignment was surveyed on foot AU areas of the aUgnment
were visible from the survey route, and aU habitat types were visite(i AU observed plants
were identified, and species Usts were compUed. Animals were identified by scat, tracks,
burrows, v(x;aUzations, OT direa observations with the aid of binoculars. Vegetation was
mapped on 1" = 40* topographical maps of the aUgnment.
No quantitative plant transects or animal trapping smdies were conducted as part of this
smdy. Scientific nomenclature used throughout this report conforms to Munz (1974) for
plants. A.O.U. (1986) fOT birds, Jennings (1983) for reptiles and amphibians, and Jones
et al. (1982) fOT mammals.
Additional sources of information included previous surveys conducted in the vicinity, as
weU as local and regional authorities. These sources arc cited where appropriate in the
report.
VEGETATION
Vegetative habitats arc deUneated in Figures 4 dirough 7 and discussed separately below.
Figure 3 provides an index to Figures 4 tiuough 7. Vegetative associations foUow HoUand
(1986) where appUcable, OT Thome (1976). A floral species Ust is included as Attach-
ment A of this report. The survey period was adequate to detea many annuals and
^ herbaceous perennials.
Three vegetative associations were deteaed onsite: disturbed OT successional coastal sage
scmb; disturbed habitat; and wetiand habitat. Disturbed habitat accounts fOT most of the
^ vegetation within the grading area.
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Successional coastal sage scmb occurs on roadcuts and upper slopes in the northeastem
portion of the site. OveraU, this asscxdation comprises 1.52 acres OT 6.3 percent of the
total vegetation within the grading area. This area is relatively (tisturbed, as evidenced by
soU displacement resulting firom previous road constraction, as weU as the preponderance
of successional native species OT non-native, weedy species. Dominant species include
Califomia sagebmsh {Artemisia californica), flat-top buckwheat {Eriogonumfasciculatum
ssp. fasciculatum), and coyote bmsh {Baccharis pilularis var. consanguinea). Other
species present, but in lesser amounts, include lemonadeberry {Rhus integrifolia), desert
elderberry {Sambucus mexicana), and coastal prickly-pear {Opuntia littoralis). The
understory of this association is poOTly developed, and consists of such species as red
brome {Bromus rubens), telegraph weed {Heterotheca grandiflora), sand-aster
{Corethrogyne filaginifolia var, virgata), and black mustard {Brassica nigra).
Disturbed vegetation is comprised of non-native, exotic, OT weedy species. This habitat
dominates the majority of the site, and is a result of past or present agricultural or grazing
activities, roadway constmction, and utiUties placement and maintenance. Typical species
include myoporam {Myoporum laetum), ttee tobacco {Nicotiana glauca), sweet fennel
{Foeniculum vulgare), castor bean {Ricinis communis), garland chrysanthemum
{Chrysanthemum coronarium), halberd-leaf saltbush {Atriplexpatula ssp. hastata), fountain
grass {Pennisetum setaceum), ice plant {Gasoul crystallinum), and Russian-thistie {Salsola
iberica), among others. Disturbed vegetation comprises 20.7 acres (86.2 percent) of the
vegetation onsite. SmaU agricultural areas occur in the northeastern portion of the
aUgnment, and account for an additional 0.96 acre (4.0 percent) which is effectively
classified as disturbed habitat from a Inological perspective.
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NOTE
LEGEND
DISTURBED COASTAL SAGE SCRUB
RIPARIAN WOODLAND
RIPARIAN SCRUB
MESIC VEGETATION
EXOTIC TREES
MULEFAT (Baccharis glulinosa)
COAST LIVE OAK
WETLAND HABITAT IMPACTED BY
PROJECT (Permanent)
WETLAND HABITAT IMPACTED BY
PROJECT (Short-Term)
: Areas undelineated denote disturbed
vegetation or agriculture.
L Vegetative Habitats as Shown Along Project Site
WESTEC Services, Inc
FIGURE
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LEGEND
DISTURBED COASTAL SAGE SCRUB
RIPARIAN WOODLAND
RIPARIAN SCRUB
MESIC VEGETATION
EXOTIC TREES
MULEFAT {Baccharis glutinosa)
COAST LIVE OAK
WETLAND HABITAT IMPACTED BY
PROJECT (Permanent)
WETLAND HABITAT IMPACTED BY
PROJECT (Short-Term)
NOTE; Areas undelineated denote disturbed
vegetation or agriculture.
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Vegetative Habitats as Shown Along Project Site
FIGURE
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WESTEC Services. Inc.
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*
ZZ
NOTE
LEGEND
DISTURBED COASTAL SAGE SCRUB
RIPARIAN WOODLAND
RIPARIAN SCRUB
MESIC VEGETATION
EXOTIC TREES
MULEFAT (Baccharis glutinosa)
COAST LIVE OAK
WETLAND HABITAT IMPACTED BY
PROJECT (Permanent)
WETLAND HABITAT IMPACTED BY
PROJECT (Short-Term)
: Areas undelineated denote disturbed
vegetation or agriculUJre.
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4
8
Vegetative Habitats as Sliown Along Project Site
FIGURE
6
WESTEC Services. Inc.
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NOTE
LEGEND
DISTURBED COASTAL SAGE SCRUB
RIPARIAN WOODLAND
RIPARIAN SCRUB
MESIC VEGETATION
EXOTIC TREES
MULEFAT (Baccharis glutinosa)
COAST LIVE OAK
WETLAND HABITAT IMPACTED BY
PROJECT (PerTTianent)
WETLAND HABITAT IMPACTED BY
PROJECT (Short-Term)
: Areas undelineated denote disturbed
vegetation or agriculfijre.
100
FEET
Vegetative Habitats as Shown Along Project Site
FIGURE
7
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WESTEC Services. Inc.
Riparian habitat occurs in scattered locations throughout the aUgnment. and is generaUy a
direct result of aclditional water fix>m storm drains OT pipes. This habitat is better-developed
offsite to the south, in the intermittent drainage that transects C^yon de las Encinas.
Most of the riparian habitat onsite is classified as riparian scmb. In most areas, this
association is dOTiainated by m^c{dLt(Bdccharis glutinosa) or a combination of mulefat and
coyote brash. Young wiUows {Salix spp.) occur only occasionaUy in mulefat-dominated
scmb. Riparian scmb comprises 0.51 aCTe (2.1 percent) of vegetation within the
aUgnment Better-developed wetland habitat, which is dominated by anoyo wiUow {Salix
lasiolepis), cat-taU {Typha sp.), and buhiish {Scirpus sp.), occurs onsite only near the
tmck farm, in the westem portion of the aUgnment This habitat amounts to 0.13 acre
(0.54 percent of the total vegetation) onsite.
SmaU areas of mesic habitat dominated by herbaceous, facultative wetiand species occur
south of Palomar Airport Road, at the toe of the existmg slopes. Sedge {Cyperus sp.) is
the primary species in these areas. This association comprises 0.003 acre (0.01 percent)
of the total vegetation onsite.
Although no oaks OT oak wcKxUand cx;cur within the grading area, two incUvidual coast live
oak trees {Quercus agrifoiia) are located approximately 15-25 feet south of the grading
limit Southem oak wcxxlland is relatively weU-developed offsite to the southeast.
WILDLIFE
Wildlife Habitat Evaluation
OveraU, wUdlife diversity on the subject property is not expected to be high due to past
disturbances, the traffic on Palomar Airport Road, and adjacent land uses. Most of the site
also lacks dense cover, trees, and rock outcroppings which contribute to habitat diversity
and hence wUdlife diversity. The site is somewhat enhanced by the presence of riparian
and oak woo(Uands to the south. FOT the most pan. however. wUdlife use of the site is
expected to be limited to common scmb-ass(xnated species and species adapted to disturbed
environments.
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Amphibians
No amphibiansjwm detect^ onsite, and few are expected to occur here. The lack of a
permanent water source and £q)propriate habitat are limiting factors.
Reptiles
No reptile species were detected onsite. although a few are expected to occur here, includ-
ing Califonua side-blotched Uzard {Uta stansburiana elegans), westem fence lizard
{Sceloporus occidentalis), orange-throated whiptail {Cnemidophorus hyperythrus
beldingi), sUvery legless lizard {Aniella pulchra pulchra), San Diego homed lizard
{Phrynosoma coronatum blainvillei), and common kingsnake {Lampropeltis getulus).
Birds
Twelve bird species were detected onsite. Some of these, such as mouming dove {Zenaida
macroura), lesser goldfinch {Carduelis psaltria), house finch {Carpodacus mexicanus), and
northem mockingbud {Mimus polyglottos), are often associated with disturbed habitats,
and this appears to be the case onsite. Westem kingbttd {Tyrranus verticalis) and westem
meadowlark {Sturnella neglecta) were also observed in disturbed or grassy areas. Anna's
hummingbird {Archilochus anna), brown towhee {Pipilo fuscus), common flicker
{Colaptes auratus), and song sparrow {Zonotrichia melodia) were observed primarily in
scrdb habitat A red-shouldered hawk {Buteo lineatus) was observed flying over the site,
and probably forages here, but nests offsite to the south. FinaUy. a common yeUowthroat
{Geothlypis trichas) was observed in riparian habitat onsite. Most of the observed birds
can be expected to nest onsite OT nearby, with the exception of the hawk, which would not
find nesting habitat here.
Mammals
Three mammal species were deteaed within the aUgnment: bmsh rabbit {Sylvilagus
bachmani cinerascens), CaUfomia ground squirrel {Spermophilus beecheyi nudipes), and
raccoon {Procyon lotor). The abundance of Califomia ground squinel, in particular, attests
to the disturbed conditions found onsite. The lack of coyer, disturbed conditions, and
proximity to development probably limits the (x;currence of several larger mammal species,
although diese animals may utilize woodland habitats to the south as a corridOT.
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HIGH INTEREST SPECIES/HABITATS
Plants
High-interest plants include those Usted by the U.S. Fish and WUdlife Service (USFWS
1985a), Califomia Department of Fish and Game (CDFG 1985). and CMfomia Native
Plant Society (Smith and Yoi^ 1984). The CNPS Usting is sanctioned by the CaUfomia
Department of Fish and Game and essentially serves as their Ust of "cancUdate" species.
No sensitive plant species were detected onsite. PotentiaUy-occurring species are briefly
discussed below.
Several sensitive plants are known from the projea area. The great majority of these are
associated with habitats OT vegetative asscxnations which do nOT occur on^te. and are not to
be expected on the (Usturbed soUs which comprise the majority of the study area. In any
case, most of these species would have been detectable during the survey period. Five of
the sensitive species considered potentiaUy cxxuning are shmbs which are easUy detectable
duoughout the year. This list includes Encirutas baccharis {Baccharis vanessae), Califomia
adolphia {Adolphia californica), wart-stemmed ceanothus {Ceanothus verrucosus), sea
dahlia {Coreopsis maritima), and Orcutt's hazardia {Hazardia orcuttii), San Dieguito sand-
aster {Corethrogyne filaginifolia var. linifolia) is an herbaceous percnrual which would
have been present and observable during the survey peri(xL Although the closely-related
species Corethrogyne filaginifolia var. virgata occurs onsite, San Dieguito sand-aster was
not detected. FinaUy, three annual species were COTisidered potentiaUy present onsite. All
of these would also have been present and detectable during the survey period. Non-
detection incUcates that they do not occur onsite. at least in any significant numbers. This
group includes Orcutt's spineflower {Chorizanthe orcuttiana). Palmer's grappling hook
{Harpagonella palmeri), and NuttaU's loms {Lotus nuttallianus). Orcutt's spineflower,
whUe past flowering, would have been detectable to generic level during the survey period.
Palmer's grappling hook is an inconspicuous annual which would also have been past
flowering. The level of habitat disturbance is probably the limiting factor for this species
onsite. NuttaU's loms occurs on sandy beaches, and is therefore limited from occurrence
onsite by lack of suitable habitat
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Animals
High interest animal species are officiaUy Usted by the U.S. Fish and Wildlife Service
(USFWS 1985b) and die CWomia Department of Fish and Game (CDFG 1980)._ No
sensitive animal species were deteaed onsite. No sensitive amphibian species are expeaed
to utilize tills site. PotentiaUy-occurring reptile, bird, and mammal species are (Uscussed
below.
A number of declining reptUe species are known from the County. These species are con-
sidered sensitive due to their restricted distribution, which is being compoimded by on-
going habitat loss as a result of urbanization of the coastal plain region. In adtUtion, the
populational stams of many of these species is pOOTly known.
Orange-throated whiptaU {Cnemidophorus hyperythrus beldingi) is a candidate fOT federal
listing (Category 2). protected by the CaUfomia Department of Fish and Game, and
considered threatened by the San Diego Herpetological Society (SDHS 1980). The princi-
pal threat to this species is loss of habitat It is stiU l(x;aUy commrai in many areas where it
does occur. This species could also be expected in scmb habitat onsite.
San Diego homed lizard {Phrynosoma coronatum blainvillei) is a candidate fOT federal Ust-
ing (Category 2). protected by the Califomia Department of Fish and Game, and con-
sidered endangered by the San Diego Herpetological Society (SDHS 1980) due to habitat
destmction and coUecting for die pet trade. It is sliU relatively widespread and common in
San Diego County. This species could also be expected throughout low scmb habitat
onsite.
SUvery legless Uzard {Aniella pulchra pulchra) is considered threatened by the San Diego
Herpetological Society (SDHS 1980). This secretive species appears to occur in highly
localized populations near drainages, and would be most likely onsite in areas of sandy
soU.
Coastal rosy boa {Uchanura trivirgata roseofusca) is proteaed by the CJalifomia Department
of Fish and Game (1980 as amended). This species is widespread throughout the County
in dry, rocky chaparral and desert habitats, usually near drainages with intermittent
streams. Coastal rosy boa is declining due to habitat alteration. Although this species is
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more likely to occur south of the site in relatively namral habitat. in(Uviduals could occa-
sionally occur here.
Birds
Least BeU's vireo {Vireo bellii pusillus) is an obUgate riparian habitat bird species which
prefers habitat with a dense understory under 3 m in height (Goldwasser 1981). This
means that it requires riparian woo<Uand vegetation in which to carry out its life cycle.
Vireos arrive in San Diego County m late March to early April and leave fOT their Mexican
wintering grounds in September. AU reproductive activities, from pair formation to fledg-
ing of young, occur in weU-defined territories; usuaUy wiUow-dominated riparian vegeta-
tion with a dense understory. The species appears to be highly site tenacious, with males
often returning to the same general area used the previous year (Salata 1983).
The very smaU amount of riparian habitat onsite is not "prime" habitat, but is stmcturaUy
adequate fOT nesting by least BeU's vireo. This habitat could probably support a maximum
of one pair. The probabiUty of this species utiUzing riparian habitat onsite is very smaU,
however, due to the smaU areal extent of this habitat, its isolated stams. the traffic on
Palomar Airport Road, and the disturbed nature of the sunounding area.
In adcUtion to least BeU's vireo, several other breeding bird species of concem are
associated specificaUy with riparian woodland habitat These sensitive bud species include
wiUow flycatcher {Empidonax traillii), yeUow warbler {Dendroica petechia), and yellow-
breasted chat {Icteria virens). Brown-headed cowbird {Molothrus ater) parasitism in com-
bination with habitat loss are suspected as the major reasons for the decline of these
species. None of these species was deteaed onsite, although a smaU amount of marginally
suitable habitat is present in one location,
A locaUy decUning upland bird species is the black-taUed gnatcatcher {Polioptila melanura
californica) (Everett 1979; Remsen 1978). This species is associated with coastal sage
scmb habitat (Atwood 1980). It was not observed onsite and is nol expected due to the
limited extent of die onsite scmb habitat and its disturbed charaaer.
Birds of prey, as a group, arc considered sensitive due to the overaU loss of foraging and
nesting habitats. One species, red-shouldered hawk, was observed flying over the site:
This species may utiUze the site For foraging to some degree, but does not nest on the site.
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Mammals
The only high-interest mammal species which might utilize the site is b^at {Felis rw/ky).
^Sebobcat becime a species of concem a few years ago when trapping pressures increased
sharply in response to the fur trade. TMsjpccies appears relatively cominoain bmshland
habitat in San Diego Clounty (Lcnd)cck 1978) and is (^nsidetcd a pptential inhatnmt of the
study area, although it is more likely to occur in habitat south of the site.
Habitats
Sensitive habitats are those which arc considered rare within the region, support sensitive
plants OT animals, OT have high productivity or wUdlife value. The Conservation Element
of tiie (jencral Plan fOT die County of San Diego (Ctounty of San Diego 1980) Usts many of
these habitats.
Wetiand habitat is considered a sensitive resource by die Califomia Department of Fish and
Game. This habitat is specificaUy addressed by Fish and Game Code Sections 1600-1606
(Streambed Alteration Agreement), and wetlands are also covered under the jurisdiction of
the U.S. Army Corps of Engineers permit process (Reinen 1978). Wetiands are subject to
Clean Water Act permit provisions regulating dredge and fiU operations. These provisions
are enforced by the U.S. Army Corps of Engineers, with technical input from the U.S.
Environmental Protection Agency and the U.S. Fish and midlife Service. Wetland habitat
onsite consists of two (Usjunct areas of riparian wcxxUand which total 0.13 acre, six
(Jisjunct areas of riparian scrab wWch totil 0.51 acre, and mesic vegetation comprised of
wetiand asscxnated herbaceous species (0.003 acre). The total wetiand vegetation onsite
amounts to 0.64 acre. The small size of this wetiand and its stmctiual makeup do not
COT^is^TvaluaBle \wl(llife habitat in a regional context Nevertheless, the project may
require a 404 permit from the Corps of Engineers.
DISCUSSION AND IMPACT ANALYSIS
The proposed road widening project wiU result in grading of approximately 24.2 acres of
habitat on both sides of Palomar Airport Road. The overaU impact to biological resources
from this projea is not expected to be significant, given the disturbed nature of the site.
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Approximate habitat losses are shown below:
Impacts within grading area:
Habitat A<?rgagg Imp^gd
•Dismrbed 21.7
Disturbed coastal sage scrab 1-52
Riparian woodland 0.13
Riparian scmb 0-51
Mesic vegetation 0.003
Exotic ttees 0-20
•Includes agriculttore (0.74 acre), but excludes existing Palomar Auport
Road.
Projea implementation wUl result in an incremental lossof haWtat fOT potentiaUy-occuning
reptUe species and foraging habitat for raptor species (including red-shouldered hawk^.
These losses are considered a cumulative impact which is not a significant effect of this
projea alone.
Of concem, however, is the presence of sensitive wetiand habitat which occurs onsite.
This project wiU result in die permanent loss of approximately 0.64 acre of wetiand habitat
due to road widening. A short-term impact during consttniction of up to an additional
0.24 acre (0,03 acre of riparian woodland and 0.21 acre of riparian scmb) wiU occur
from constraction activities immecUately adjacent to the proposed aUgnment. These
temporarily disturbed areas wiU probably revegetate naturaUj^. In^additioiu haWtat outside
diis immediately adjacent area could also be significantiy affected if consttuction practices
are not confined to the immediate aUgnment area.
This project as designed wiU not have any significant impacts to biological resources, and
no mitigation measures wiU be requued under the CMifomia Environmental QuaUty Act.
Because impacts to wetiand vegetation total less than 1 acre, this project meets the
requirements for a Nationwide Permit under die U. S. Army Corps of Engineers Clean
Water Act Section 404 permit process. No appUcation to the Corps of Engineers would,
thwefOTe, be required The project is located in die coastal zone, however, and may require
a Coastal Development Permit from the CJalifomia Coastal Commission.
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RECOMMENDATIONS
Impacts to wetiand vegetation outside the grading area would be reduced by adherence to
certain constmction practices, as outiined below. The greatest loss of habitat is expected
from the use of heavy equipment in wetiand areas, on and offsite, and nonsensitive
constmction practices would result in additional impacts to wetiand vegetation which could
bring the total wetiand impact acreage to over 1 acre.
Construction Practices
1. Heavy equipment and constmction activities would be restricted to the grading area to
the greatest degree possible in order to reduce direct impacts to wetiand habitat.
Prohibited activities in the wetiand labitat include staging areas, equipment access, and
disposal or temporary placement of excess fiU, Constraction limits and wetiand habitat
would be fiagged by a qualified biologist. Constraction activities would be monitored
by an onsite inspectOT to ensure grading activities do not affect additional acreage. Any
unauthorized impacts caused by constraction operations would require that the
contractor replace aU habitat to its original condition.
2. FiU slopes should be constracted from the top of the existing road or t>erm, downward.
Grading should also occur from the existing road or berm outward.
3. Move headwaU sttuctures further in toward the road; reduce riprap.
4. Retain existing pipes in areas where wetland vegetation occurs in order to avoid
adcUtional wetiand habitat removal. It is acknowledged that new pipes wUl need to be
placed,
5. Fueling of equipment should not occur in any portion of the site near the intemiittent
stream in Onyon de las Encinas.
Habitat Replacement
Although the loss of coastal sage scmb onsite is not considered a significant effect of this
project, it is recommended that slopes be revegetated with native scmb species found in the
18
area. Suitable species include Califomia sagebrash {Artemisia californica), flat-top
buckwheat {Eriogonum fasciculatum ssp. fasciculatum), IcmonadGbcrry {Rhus
integrifolia), and deerweed {Lotus scoparius), among others. This area could be effectively
hydroseede(L
Other Recommendations
Two coast Uve oak trees occur approximately 20 feet outside the grading line (Figure 7) in
the northeastem portion of the aUgnment. These oaks should be staked and flagged by
qualified personnel prior to the onset of constraction. All constmction activities should be
prohibited within 10 feet of the dripline of these trees. This includes equipment as weU as
earth-moving activities.
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REFERENCES CITED
American Ornithologists' Union, Committee on Classification and Nomenclature, 1986.
Thirty-fourth Supplement to the A.O.U. CheckUst of North American Buds. The
Auk 99(3).
im Atwood. J. 1980. The United States distribution of the Califomia black-taUed gnatcatcher.
Westem Birds 11:65-78.
Califomia Department of Fish and Game. 1985. Designated endangered or rare plants.
** The Resources Agency. June 19.
"* County of San Diego. 1980. Conservation Element (Part X) of the County general plan,
«* Planning Department GPA-80-61.
Everett, W,T. 1979. Threatened, declining, and sensitive bird species in San Diego
^ Coimty. San Diego Audubon Society, Sketches. June.
m, Goldwasser, S. 1981. Habitat requirements of the least BeU's vu-eo. Califomia
Departmeni of Fish and Game. Sacramento. UnpubUshed report.
mm
HoUand, R.F. 1986. Preliminary descriptions of the terrestrial natural communities of
California. State of California. The Resources Agency.
aw
Jennings. M.R. 1983, An aimolaled checkUst of the amphibians and reptUes of Califomia.
— CaUfomia Fish and Game 69(3):151-171.
* Jones. J.K.. Jr.. D.C. Carter, H.H. Genoways. R.S. Hofftnan. and D.W. Rice. 1982,
^ Revised checkUst of North American mammals north of Mexico. Occasional Papers
of die Museum Texas Tech. Umversity 80:1-22.
wm
Lembeck. M 1978. Bobcat study, San Diego County. (California Department of Fish and
Game, Nongame WUdlife fiivestigations. Study IV. Job 1.7.
HH
Munz. P.A. 1974, A flora of southern Califomia. University of Califomia Press,
— Berkeley.
Reinen, R.H. 1978. Notice of exercise of Section 404 jurisdiction over certain stteams
^ and wetiands in California. Los Angeles District Corps of Engineers, July 15.
tm Remsen, V. 1978. The species of special concem Ust: an armotated Ust of declining or
vulnerable birds in Califomia. Westem Field Omithologist Museum of Vertebrate
— Zoology, Uiuversity of C^alifomia, Berkeley.
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20
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Califomia.
21
ATTACHMENT A
FLORAL SPECIES LIST
FamUy Scientific Name
Dicotyledoneae
Aizoaceae - Carpet-Weed FamUy
Carpobrotus aequilateralus
Gasoul crystalUnum
Gasoul nodiflorum
Anacardiaceae - Sumac Family
Rhus integrifoUa
Apiaceae (UmbelUferae) - Carrot FamUy
Foeniculum vulgare
Asteraceae (Compositae) - Sunflower FamUy
Ambrosia confertiflora
Anthemis cotula
Artemisia caUfornica
Baccharis glutinosa
Baccharis pilularis
ssp. consanguinea
Cttlycadenia tenella
Centaurea meUtensis
Chrysanthemum coronarium
Cirsium sp.
Conyza canadensis
Corethrogyne fUaginifoUa
var. virgata
Cotula coronopifoUa
Attachment A
FLORAL SPECIES LIST
Common Name
Sea-Fig
Ice-Plant
Little Ice-Plant
Lemonadeberry
Sweet Fennel
Mayweed
CaUfornia Sagebrush
Mule Fat
Coyote Brush
Rosin Weed
Tocalote
Annual Chrysanthemum
Thistle
Horseweed
Sand-Aster
Brass-Buttons
twm
Cynara cardunculus
Gnaphalium bicolor
GnaphaUum caUfornicum
Haplopappus squarrosus
ssp. grmdeUoides
Haplopappus yenetus
ssp. vernonioides
Hemizonia fasciculata
Heterotheca grandiflora
Lactuca serriola
Pieris echioides
SUybum marianum
Sonchus oleraceus
Stephanomeria exigua
Xanthium strumarium
var. canadense
Borginaceae - Borage FamUy
HeUotropium curassavicum
var. oculatum
Brassicaceae (Cruciferae) - Mustard FamUy
Brassica nigra
Raphanus sativus
Sisymbrium altissimum
Cactaceae - Cactus FamUy
Opuntia UttoraUs
Capparaceae - Caper Family
Isomeris arborea
var. arborea
Cardoon
Cudweed
CaUfornia Everlasting
Hazardia
Coastal Isocoma
Tarweed
Telegraph Weed
Prickly Lettuce
Bristly Ox Tongue
MUk Thistle
Sow Thistle
Small Wreath-Plant
Cocklebur
Chinese Pusley
Black Mustard
WUd Radish
Tumble Mustard
Coastal Prickly Pear
Bladderpod
CaprifoUaceae - Honeysuckle Family
Sambucus mexicana
CaryophyUaceae - Pink FamUy
Spergularia sp.
Chenopodiaceae - Goosefoot Family
Atriplex patula
ssp. hastata
Atriplex semibaccata
Chenopodium califomicum
Salsola iberica
Convolvulaceae - Morning-Glory FamUy
Calystegia macrostegia
Euphorbiaceae - Spurge Family
Eremocarpus setigerus
Ricinus communis
Fabaceae (Leguminosae) - Pea FamUy
Lotus scoparius
ssp. scoparius
Medicago polymorpha
MeUlotus albus
Geraniaceae - Geranium FamUy
Erodium cicutarium
Malvaceae - Mallow FamUy
Malacothamnus fasciculatus
var. fasciculatus
Malva parviflora
Elderberry
Sand Spurrey
Halberd-Leaf Saltbush
AustraUan Saltbush
CaUfornia Pigweed
Russian-Thistle
Morning Glory
Turkey Mullein, Dove Weed
Castor Bean
Deerweed
Bur-Clover
White Sweet-Clover
Red-Stem Filaree
Bush Mallow
Cheeseweed
mi
Myoporaceae - Myoporum FamUy
Myoporum laetum
Papaveraceae - Poppy Family
Eschscholzia caUfornica
Plantaginaceae - Plaintain Family
Plantago lanceolata
Polygonaceae - Buckwheat FamUy
Eriogonum elongatum
Eriogonum fasciculatum
ssp. fasciculatum
Polygonum sp.
Rumex crispus
Primulaceae - Primrose FamUy
Anagallis arvensis
Rubiaceae - Madder Family
GaUum angustifoUum
SaUcaeeae - WiUow FamUy
Salix lasiolepis
var. braceUnae
Solanaceae - Nightshade Family
Datura meteloides
Nicotiana glauca
Solanum douglasii
Monocotyledoneae
Cyperaceae - Sedge FamUy
Cyperus alternifoUus
Scirpus sp.
Myoporum
CaUfornia Poppy
Narrow-Leaf Plantain
Long-Stemmed Eriogonum
CaUfornia Buckwheat
Curly Dock
Pimpernel
Narrowleaf Bedstraw
Arroyo WiUow
Jimson Weed
Tree Tobacco
Douglas Nightshade
Umbrella Plant
Bulrush
iM
Poaceae (Gramineae) - Grass FamUy
Arundo donax
Avena barbata
Bromus diandrus
Bromus moUis
Bromus rubens
Cortaderia atacamensis
Cynodon dactylon
Hordeum vulgare
Lamarckia aurea
LoUum perenne
ssp. multiforum
Paspalum dUatatum
Peimisetum setaceum
Phalaris canariensis
Polypogon monspeUensis
Sorghum halepense
Stipa sp.
Typhaceae - CattaU FamUy
Typha sp.
Giant Reed
Slender WUd Oat
Ripgut Grass
Soft Chess
FoxtaU Chess
Pampas Grass
Bermuda Grass
Common Barley
Goldentop
ItaUan Ryegrass
DaUis Grass
Fountain Grass
Canary Grass
Rabbitfoot Grass
Johnson Grass
Bunchgrass
CattaU
1.
2.
Nomenclature foUows Munz, 1974.
Species detected winter 1986-87 by WESTEC Services, Inc. throughout the
area and June 1986 by R. Friesen on the Warmington parcel.