Biological Report
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Biological Report 3093 Beachcomber Drive APN: 065-120-001 Morro Bay, CA Owner: Paul LaPlante Permit #29586 Prepared by V. L. Holland, Ph.D. Plant and Restoration Ecology 1697 El Cerrito Ct. San Luis Obispo, CA 93401 Prepared for: John K Construction, Inc. 110 Day Street Nipomo, CA 93444 [email protected] and Paul LaPlante 1935 Beachcomber Drive Morro Bay, CA 93442 March 5, 2013 BIOLOGICAL SURVEY OF 3093 BEACHCOMBER DRIVE, MORRO BAY, CA 2 TABLE OF CONTENTS EXECUTIVE SUMMARY ..................................................................................... 3 INTRODUCTION AND PURPOSE ...................................................................... 4 LOCATION AND PHYSICAL FEATURES ........................................................ 10 FLORISTIC, VEGETATION, AND WILDLIFE INVENTORY ............................. 11 METHODS ......................................................................................................... 11 RESULTS: FLORA AND VEGETATION ON SITE .......................................... 12 FLORA .............................................................................................................. 12 VEGETATION ..................................................................................................... 13 1. ANTHROPOGENIC (RUDERAL) COMMUNITIES ................................................... 13 2. COASTAL DUNE SCRUB ................................................................................. 15 SPECIAL STATUS PLANT SPECIES ............................................................... 16 RESULTS: WILDLIFE ON SITE ....................................................................... 28 SPECIAL STATUS WILDLIFE SPECIES .......................................................... 29 POTENTIAL IMPACTS AND RECOMMENDED MITIGATION MEASURES ... 37 CONCLUSION ................................................................................................... 38 REFERENCES ................................................................................................... 39 APPENDIX 1. LIST OF PLANT SPECIES . ...................................................... 41 APPENDIX 2 SPECIAL STATUS ANIMAL SPECIES ...................................... 42 APPENDIX 3. PHOTOS ..................................................................................... 57 BIOLOGICAL SURVEY OF 3093 BEACHCOMBER DRIVE, MORRO BAY, CA 3 EXECUTIVE SUMMARY The subject site (APN: 065-120-001) is an undeveloped lot located at 3093 Beachcomber Drive, Morro Bay, CA, which is in an existing residential development in northern Morro Bay, CA. The rectangular shaped lot, owned by Paul LaPlante, is approximately 135 feet by 60 feet or 8,100 sq. ft. in area. The lot fronts on Beachcomber Drive, which forms the its eastern boundary, and a residential lot with an existing home forms its southern boundary. The western and northern boundaries adjoin State Park land (Atascadero or Morro Strand State Beach); however, maps also identify a road, Driftwood Avenue, along the western boundary of the lot. Drs. V. L. Holland and/or David Keil conducted biological surveys of the site on January 30, February 10 and 22, and March 4, 2013. The subject lot has a very low species diversity. We only found a total of 16 plant species on the lot consisting of no trees, two shrubs (one native to the site) and 16 grasses and forbs (one native). Of the 16 species on the site, one is native and 15 are introduced. The lot is highly disturbed and is currently covered by anthropogenic (ruderal) vegetation consisting of thick patches of Carpobrotus edulis (ice plant) mixed with a diversity of invasive weedy plants. However, the northwestern portion of the lot extends to the edge of the coastal dune scrub vegetation that covers the stabilized dunes between the subject lot and Estero Bay. The owner, Paul LaPlante, is applying for a permit to construct a single-family home on the lot. A biological study of the lot is required to meet the City of Morro Bay Public Services Department permitting requirements. There are several factors that have greatly reduced the biological significance and wildlife habitat values of this lot. Residential development, paved roads, and heavy human usage of the area reduces wildlife values. The vegetation cover on the lot, which is composed of a large patch of ice plant and introduced, weedy grasses and forbs, does not provide suitable habitat for most wildlife species in this area. All of these factors reduce the biological value and wildlife habitats on the site. The coastal dune scrub west of the subject lot does provide valuable wildlife habitat for a number of species. However, the proposed development will not encroach into this habitat, and the coastal dune scrub near the western boundary of the lot will be fenced to assure no disturbances occur. While we do not believe the Morro blue butterfly or the shoulderband snail occur on or near the lot, we still recommend that the western boundary of the lot where the coastal dune scrub occurs be fenced to assure that the habitat of these species is protected. In addition, we recommend that the lot be searched again for shoulderband snails just prior to construction. If any are found, which we believe is highly unlikely, they should be carefully placed in appropriate habitats in the coastal dune scrub west of the subject lot. BIOLOGICAL SURVEY OF 3093 BEACHCOMBER DRIVE, MORRO BAY, CA 4 INTRODUCTION AND PURPOSE The subject site (APN: 065-120-001) is an undeveloped lot located at 3093 Beachcomber Drive, Morro Bay, CA, which is in an existing residential development in northern Morro Bay, CA (Figures 1 and 2; Photo 1). It is identified as Lot 1, Tract 1124, 12 MB 24, which is part of the Rancho Cayucos Land Grant, in Township 29 South, Range 12 East, Mt. Diablo Base Meridian. The rectangular shaped lot, owned by Paul LaPlante, is near the intersection of Beachcomber Drive and Hatteras Street. It is approximately 135 feet by 60 feet or 8,100 sq. ft. in area. The subject lot fronts on Beachcomber Drive, which forms the its eastern boundary, and adjoins a residential lot with an existing home along its southern boundary. The western and northern boundaries of the lot adjoin State Park land (Atascadero and Morro Strand State Beach); however, maps identify a road, Driftwood Avenue, along the western boundary of the lot (Figure 3). There is a trail approximately 80 feet north of the subject lot that provides access to the State Park lands and the beach along Estero Bay (Figure 2). There are existing homes on the lots along the west side of Beachcomber Drive across the street from the subject lot (Figure 2; Photo 2). The lot is highly disturbed and is currently covered by anthropogenic (ruderal) vegetation consisting of thick patches of Carpobrotus edulis (ice plant) mixed with a diversity of invasive weedy plants (Photos 1 to 3). Weedy plants (ruderal vegetation) also cover the State Park land along the northern boundary of the subject lot (Figure 6 and 7). The northwestern portion of the lot extends to the edge of the coastal dune scrub vegetation, which covers the stabilized dunes between the subject lot and Estero Bay (Photos 1, 4, and 5). The owner, Paul LaPlante, is applying for a permit to construct a single-family home on the lot. A biological study of the lot is required to meet the City of Morro Bay Public Services Department permitting requirements. Drs. V. L. Holland and/or David Keil conducted biological surveys of the site on January 30, February 10 and 22, and March 4, 2013. The results of these surveys are discussed in this report. The purpose of these surveys is to examine the existing flora, vegetation, and wildlife habitat on the parcel. Special attention is given to the presence or potential presence of rare and endangered species and sensitive habitats. During the analysis of the site, the entire lot and areas immediately around it were examined. These areas were carefully searched for the presence or potential presence of sensitive habitats and species of special concern known to occur in the Morro Bay north, and surrounding quadrangles (Table 4). BIOLOGICAL SURVEY OF 3093 BEACHCOMBER DRIVE, MORRO BAY, CA 5 Figure 1. Vicinity map showing the general location of the subject lot on 3093 Beachcomber Drive, Morro Bay, CA. (red square). BIOLOGICAL SURVEY OF 3093 BEACHCOMBER DRIVE, MORRO BAY, CA 6 Figure 2. Aerial showing a closer view of the subject lot’s location at 3093 Beachcomber Drive, Morro Bay, CA. and the surrounding residential subdivision that occurs in the areas to the north, south, and east of the lot. The lot adjoins State Park land along its northern and western boundaries. The shoreline of Estero By is approximately 1,000 feet west of the subject lot. 7 Lot 13, Atas. Bch. Note that this map map this that Note Lot 12, Atas. Bch. ACCESS will owner The BEACH BARRACADE Hatteras Street PATH LOCAL BENCH 22.3 MARK, NAIL 15' ELEV. 23.83 CABLE RAILING AC NGVD 29 23.40 TC 22.24 FL 23.03 FL CONC SIGN "NO CURB KITE FLYING" 23.39 TC 23.12 FL 23.6 L AND D SU 23.4 E R S M R. V N I A D E 23.0 E L Y Y O C L E I R I R Lot 14, Atas. Bch. L W BARRACADE 2"IP W/ TAG 23.18 TC 22.88 FL S L.S. 5661 RCE 6923 T I A EXP. 9/30/2013 N IN CONC PAD A 23.1 AC T O 23.10 E R I EL 23.65 23.06 TC O Lot 11, Atas. Bch. BLOCK 15A F 22.76 FL F C A L 23.3 22.8 23.1 2" WITNESS Beachcomber Drive WATER LINE 2"IP W/ TAG PIPE Lot 2, Tract 1124 RCE 6923 N83°01'48"E 134.89' 22.9 IN CONC PAD 1 FT BELOW GRADE EL 14.53 22.68 TC 22.40 FL , MORRO BAY, CA 25' ROLL CURB & 25' GUTTER 22.2 22.5 Driftwood Avenue S7°07'43"E 59.73' S7°07'43"E GUY Lot 1, Tract 1124 20' 20' Ave. Nat. Grade = 21.7 CITY OF MORRO BAY Area : 8079 sf 22.6 NET BLOCK 14A LOT 1, TRACT 1124 (12 MB 42) County of San Luis Obispo, California N7°08'45"W 60.07' N7°08'45"W 2" WITNESS 22.35 TC PIPE 22.05 FL TOPGRAPHIC & BOUNDARY SURVEY JP 22.6 AC GAS LINE 2"IP W TAG 22.6 RCE 6923 IN CONC PAD 4" WITNESS 5' P.U.E. PER 22.1S82°53'16"W 134.87' EL 22.41 PIPE 694 OR 396 SEWER LINE 21.7 22.21 TC 22.88 FL Lot 16, Atas.