HomeMy WebLinkAboutCT 93-09; Ocean Bluff; Tentative Map (CT) (72)Anita M. Haywo
Biological Consultant
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May 5, 1994
Ocean Bluff Partners
c/o Jack Henthorn & Associates
5431 Avenida Encinas
Suite G . M/
Carlsbad, CA 92008
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Re: Reconnaissance survey of the north-western corner
Dear Mr. Henthorn,
A site visit was made to the Ocean Bluff Partners property on November 8, 1993. The
approximately 30 acre parcel is located south of Palomar Airport Road and west of El
Camino Real within Zone 20 of Carlsbad, California. The northwestern corner of the
property was visited to determine the habitat type and the quality of the habitat.
The northwestern corner consists of a wide, steep sided ravine. The sides of this ravine are
severely eroded in some areas however there is some vegetation present in most areas. The
northern part of the ravine is composed of southern mixed chaparral (SMC). The vegetation
is relatively diverse, is of high cover, and fairly typical of this habitat type. This habitat is
typified by plant species such as laurel sumac (Malosma laurina), lemonadeberry (Rhus
integrifolia), wart-stemmed ceanothus (Ceanothus vemtcosus), scrub oak (Quercus dumosd),
mission manzanita (Xylococcus bicolor), and toyon (Heteromeles arbutifolid). A small pocket
of chamise chaparral is contained within this area which is composed entirely of chamise
(Adenosiomajascivulcauni). The flat, open bottom of the ravine and a portion of its eastern
edge is disturbed habitat. This area contains some scattered SMC shrubs such as laurel
sumac, but it is highly dominated by weedy, invasive non-native species such as mustard
species (Brassica sp.), non-native grasses, and pampasgrass (Cortaderia jubata). A large
stand of yerba santa (Eriodictyon crassifolium) is also present in this area and is dominant in
some cases. A small part of the slope of the ravine adjacent to the eastern edge of the
disturbed area is composed of scattered SMC shrubs. This area contains few shrubs and
provides low vegetative cover. The southern edge of the ravine is composed of disturbed
southern mixed chaparral. The vegetation is disturbed due to the erosion and the shrub cover
and species diversity is lower than in the northern part of the ravine.
10542 Montego Drive / San Diego CA 92124 / (619) 694-0084
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One sensitive plant species was observed during this reconnaissance survey. The wart-
stemmed ceanothus, which occurs in the SMC habitat and the disturbed SMC habitat, is on
List 2 of the California Native Plant Society. This indicates that the species is rare,
threatened, or endangered in California but is more common elsewhere. The species is not
listed with the California Department of Fish and Game or the U. S. Fish and Wildlife
Service. Although not listed by the resource agencies, it is recommended that impacts to this
species be avoided as much as possible.
The placement of a desiltation basin within the disturbed habitat of the ravine area would not
impact sensitive habitats, such as coastal sage scrub or SMC, or sensitive species, such as the
wart-stemmed ceanothus. The placement of the maintenance road and drain pipe,
additionally, would not create impacts which would require mitigation.
Please contact me if you have additional questions regarding this reconnaissance survey.
Sincerely,
Anita M. Hayworth
Owner/Biologist
10542 Montego Drive / San Diego CA 92124 / (619) 694-0084
OCEAN BLUFF CT 93-09
REMAINDER PARCEL BIOLOGICAL;AF
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REMAINDER PARCEL HABITATION SLOP
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