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4.3 BIOLOGICAL RESOURCES 4.3.1 INTRODUCTION This section discusses the common and special-status biological resources existing within the Fresno Canyon project site, the current status of these resources before project implementation, the potential significant adverse impacts on these resources from the proposed project implementation within the project site area, and measures to mitigate these impacts. This analysis is based on the March 2013 Initial Study for the proposed project, the June 2009 Draft Biological Assessment prepared for The Federal Emergency Management Agency (FEMA) by URS Group, Inc., the subsequent July 2013 Biological Assessment supplement prepared for FEMA by Impact Sciences, the January 2010 Biological Opinion (BO) prepared by US Fish and Wildlife Service for the subject project, review of relevant literature and data, and recent field studies on and adjacent to the subject project site. Background The Ventura County Watershed Protection District (VCWPD) proposes to construct a flood control facility to transport floodwater, sediment, and debris from Fresno Canyon to the Ventura River. This project is intended to reduce the risk of flooding in the community of Casitas Springs in Ventura County, California, and on SR-33. FEMA proposes to provide Pre-disaster Mitigation (PDM) Program federal financial assistance (federal action) (PDM-PJ-09-CA-2007-013) to VCWPD (Subgrantee), through the California Emergency Management Agency (f/k/a Governor’s Office of Emergency Services), in support of the Fresno Canyon Flood Mitigation Project. The PDM Program assists states and communities by providing federal financial assistance to implement sustained, pre-disaster, natural-hazard mitigation programs to reduce the risk of injury and damage from natural disasters and also to reduce reliance on funding from disaster declarations. In 2009, URS Group, Inc., assisted FEMA by preparing a Draft Biological Assessment to be submitted to National Marine Fisheries Service (NMFS) for evaluation of resources that are under their jurisdiction (Appendix C). The US Fish and Wildlife Service (FWS) was also consulted with respect to special-status resources under their jurisdiction. The FWS subsequently prepared a BO in January 2010 addressing potential effects of the proposed project on the federally Threatened California red-legged frog (Rana draytonii) and the federally Endangered least Bell’s vireo (Vireo bellii pusillus) and southwestern willow flycatcher (Empidonax trailllii extimus) in accordance with Section 7 of the Endangered Species Act (ESA) of 1973, as amended (Act)(16 USC 1531 et seq.) (Appendix C). Impact Sciences, Inc. 4.3-1 Fresno Canyon Flood Mitigation Project Draft EIR 1137.001 December 2013 4.3 Biological Resources In July 2013, Impact Sciences prepared a supplement to the Biological Assessment for NMFS that primarily focused on potential impacts to the Endangered Southern California steelhead trout (Oncorhynchus mykiss) Distinct Population Segment (DPS) and its associated Critical Habitat (Appendix C). 4.3.2 METHODOLOGY Literature Review Documentation pertinent to the biological resources on and near the site was reviewed and analyzed. Information reviewed included: (1) the Federal Register listing package for the federally listed species known to occur in the area1; (2) literature pertaining to habitat requirements of sensitive species potentially occurring on the project site; (3) the most recent updates of the California Natural Diversity Data Base (CNDDB)2 and California Native Plant Society (CNPS)3 information regarding sensitive species potentially occurring on and near the project site and (4) previous biological studies conducted on the subject property. The database query included the Ventura, California US Geological Survey (USGS) 7.5-minute quadrangle, in which the project site is located, as well as the following six surrounding quadrangles: Matilija, Ojai, Saticoy, Oxnard, Pitas Point, and White Ledge Peak. Additionally, all biological studies previously prepared for the project were reviewed. Field Studies Impact Sciences’ biologist Dave Crawford conducted a field visit at the project site on September 21, 2012. The purpose of the site visit was to characterize and evaluate the existing conditions and the potential of the on-site habitats to support special-status animal species and to inventory wildlife species present at the time of the survey. On October 11, 2012, Dr. Edith Read of E. Read and Associates visited the site to map existing vegetation associations, evaluate the existing conditions and the potential of the on-site habitats to support special-status plant species, and inventory plant species present within the project area. The potential for special-status species to occur on the project site is based on the proximity of the site to recorded occurrences from the CNDDB and CNPS databases, knowledge of the project region, on-site 1 US Fish and Wildlife Service. Endangered and Threatened Wildlife and Plants; Animal Candidate Review for Listing as Endangered or Threatened Species; Proposed Rule Federal Register 50, CFR Part 17. US Department of the Interior. Washington, DC. 1996. 2 California Department of Fish and Wildlife (CDFW). California Department of Fish and Game Natural Diversity Data Base. Commercial Version, Update July 2, 2012 and August 6, 2013. 3 California Native Plant Society. 2013. Inventory of Rare, Threatened, and Endangered Plants of California. Online database available at: http://www.rareplants.cnps.org/. Accessed July 2012 and August 2013. Impact Sciences, Inc. 4.3-2 Fresno Canyon Flood Mitigation Project Draft EIR 1137.001 December 2013 4.3 Biological Resources vegetation, habitat characteristics, topography, elevation, soils, surrounding land uses, and habitat preferences and geographic ranges of special-status plant and animals species known to occur in the project region. 4.3.3 ENVIRONMENTAL SETTING Project Location The project area is approximately 5 miles inland from the Pacific Ocean in the community of Casitas Springs in Ventura County, California, immediately north (upstream) of Foster Park. It is located south of the Ojai Valley and surrounded by three mountain ranges. To the north the Nordhoff Ridge extends to approximately 5,000 feet above mean sea level (amsl). This ridge continues to the Topa Topa Bluff east of the Ojai Valley which stands 6,000 feet amsl. Sulphur Mountain bounds the Ojai Valley on the south at just under 3,000 feet amsl. Elevation at the site is approximately 280 feet amsl. Foster Park is adjacent and south of the site and Lake Casitas is approximately 1.3 miles to the northwest. The project area encompasses a small section of the Ventura River bank and extends approximately 1,400 feet east of the Ventura River on to adjacent uplands. The uplands include some riparian areas, woodland, scrub, residential areas, and a crossing of SR-33. The climate in the project area is Mediterranean and characterized by hot, dry summers and mild winters. As is typical for much of coastal Southern California, most precipitation falls in the form of rain between the months of October and April with intervening dry summers. The average temperatures in the summer months are in the upper 80 degrees Fahrenheit (°F) with lows in the mid-50s °F. Average temperatures in the winter months are in the high 60s °F with lows in the mid-30s °F. Rainfall averages 18.4 inches per year with between 2 and 5 inches per month falling between November and March. Existing Conditions The site includes a small portion of the eastern bank of the Ventura River and extends inland eastward for approximately 1,400 feet. The upland areas include oak woodlands, coastal scrub, residential development, and a crossing of SR-33. Vegetation Vegetation assemblages observed on the Fresno Canyon project site area is described below. Vegetation classifications generally follow Sawyer and Keeler-Wolf.4 Table 4.3-1, below, provides a list of all plant species recorded during the October 2012 survey. 4 Sawyer and Keeler-Wolf. A Manual of California Vegetation. 2nd ed. California Native Plant Society. Sacramento, California. 2009. Impact Sciences, Inc. 4.3-3 Fresno Canyon Flood Mitigation Project Draft EIR 1137.001 December 2013 4.3 Biological Resources Table 4.3-1 Vascular Plant Species Recorded on the Project Site Latin Name Common Name Gymnosperms Conifers Pinaceae Pine Family Pinus muricata Bishop pine Dicots Flowering Plants Adoxaceae Muskroot Family Sambucus nigra L. ssp. caerulea (Raf.) Bolli blue elderberry Anacardiaceae Sumac Family Rhus integrifolia (Nutt.) Brewer & S. Watson lemonadeberry Schinus molle L.* Peruvian pepper tree Apiaceae Carrot Family Foeniculum vulgare Mill.* fennel Apocynaceae Dogbane Family Vinca major L. * periwinkle Araliaceae Ginseng Family Hedera helix* English ivy Asteraceae Sunflower Family Ambrosia psilostachya DC. western ragweed Artemisia californica Less. California sagebrush Baccharis pilularis DC. coyote brush Baccharis salicifolia (Ruiz Lopez & Pavon) Pers. mule fat Helminthotheca echioides (L.) Holub* bristly ox-tongue Lessingia filaginifolia (Hook. & Arn.) M.A. Lane California-aster Silybum marianum (L.) Gaertn.* milk thistle Xanthium sp.* cocklebur Betulaceae Birch Family Alnus rhombifolia Nutt. white alder Brassicaceae Mustard Family Brassica nigra (L.) W.D.J. Koch* black mustard Cactaceae Cactus Family Opuntia ficus-indica (L.) Miller* Indian fig cactus Cucurbitaceae Cucumber Family Marah fabacea (Naudin) Greene California man-root Fabaceae Legume
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