Morro Creek Biological Assessment
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Morro Creek Multi-Use Trail and Bridge Project Biological Assessment San Luis Obispo County, California Federal Project Number CASB12RP-5391(013) MB-2013-S2 05-SLO-0-CR December 2013 For individuals with sensory disabilities, this document is available in Braille, large print, on audiocassette, or computer disk. To obtain a copy in one of these alternate formats, please call or write to Caltrans, Attn: Brandy Rider, Environmental Stewardship Branch, 50 Higuera Street, San Luis Obispo, CA 93401; Phone: (805) 549-3182 Voice, or use the California Relay Service TTY number, 1 (800) 735-2929. Biological Assessment Morro Creek Multi-Use Trail and Bridge Project San Luis Obispo County Federal Project Number CASB12RP-539(013) MB-2013-S2 05-SLO-0-CR December 2013 STATE OF CALIFORNIA Department of Transportation City of Morro Bay Prepared By: ___________________________________ Date: __12/10/2013_ Kristie Haydu (805) 547-0900 Rincon Consultants, Inc. 1530 Monterey Street, Suite D San Luis Obispo, CA 93401 Approved By: ___________________________________ Date: ____________ Kathleen Wold, AICP (805) 772-6211 Planning Manager City of Morro Bay Public Services Approved By: ___________________________________ Date: ____________ Brandy Rider (805) 549-3970 Branch Chief Environmental Stewardship Branch Caltrans District 5 Summary of Findings, Conclusions and Determinations Summary of Findings, Conclusions and Determinations The City of Morro Bay is proposing to extend the existing Harborwalk with continuation of a paved pedestrian boardwalk and separate Class I bike path from the existing parking area and crossing on Embarcadero Avenue northward. The city also proposes to install a clear-span pre-engineered/pre-fabricated bike and pedestrian bridge over Morro Creek to connect to north Morro Bay on Embarcadero Road/State Route 41. In addition, the project will include improvements to beach access from the trail, improved parking, and two interpretive sign stations that will display educational and other information about the cultural and natural history of the region. This project is being funded funding from the Federal Highway Administration (FHWA) and with assistance from Caltrans. As part of its NEPA assignment of federal responsibilities by the FHWA, effective October 1, 2012 and pursuant to 23 USC 326, Caltrans is acting as the lead federal agency for Section 7 of the federal Endangered Species Act. The proposed project is not likely to affect the south/central California coast steelhead Distinct Population Segment and impacts to this species or its habitat are not expected to occur. Morro Creek is federally designated critical habitat for steelhead; however the project has been designed to avoid all impacts Morro Creek. The proposed project may affect California red-legged frogs during abutment installation as a result of direct impacts to upland habitat areas along the northern bank of Morro Creek. The project site is not within designated critical habitat for this species. The proposed project may also affect Morro shoulderband snail. The project may result in impacts if Morro shoulderband snails are present within the central dune scrub and/or ice plant habitats. Likewise, the proposed project could result in impacts to Morro shoulderband snail from ground disturbance activities and unintended harassment. The project site is not within designated critical habitat for the snail. All potential project-related impacts to these three federally listed species will be avoided and/or minimized to the maximum extent feasible through application of the efforts and measures outlined for each species in Chapter 4. No other projects are known or projected to occur within the vicinity of the proposed project within the foreseeable future. As such, no cumulative project-related impacts to these three federally listed species would occur. This project meets the criteria for the U. S. Fish and Wildlife Service California Red-legged Frog Programmatic Biological Opinion for Projects Funded or Approved under the Federal Highway Administration's Federal Aid Program (USFWS, 2011). Morro Creek Multi-Use Trail and Bridge Project iv Table of Contents Table of Contents Chapter 1. Introduction ......................................................................................... 1 1.1. Project History ................................................................................................. 1 1.2. Project Description .......................................................................................... 1 1.3. Summary of Consultation to Date ................................................................... 5 1.4. Document Preparation History ........................................................................ 5 Chapter 2. Study Methods ..................................................................................... 6 2.1. Listed and Proposed Species Potentially in the Biological Study Area .......... 6 2.1.1. Designated Critical Habitat ...................................................................... 9 2.2. Studies Required ............................................................................................ 12 2.3. Personnel and Survey Dates .......................................................................... 20 2.4. Agency Coordination and Professional Contacts .......................................... 20 2.5. Limitations That May Influence Results ....................................................... 21 Chapter 3. Results: Environmental Setting ........................................................ 22 3.1. Description of Existing Biological and Physical Conditions ........................ 22 3.1.1. Soils ........................................................................................................ 23 3.1.2. Hydrology .............................................................................................. 23 3.1.3. Vegetation Communities ........................................................................ 23 3.1.3.1. Central Dune Scrub ............................................................................ 25 3.1.3.2. Ice Plant .............................................................................................. 25 3.1.3.3. Arroyo Willow Woodland/Riparian ................................................... 26 3.1.3.4. Bulrush/Cattail Wetland ..................................................................... 26 3.1.3.5. Ruderal/Developed ............................................................................. 27 Chapter 4. Results: Biological Resources, Discussion of Impacts and Mitigation ............................................................................................................. 28 4.1. Federally-Listed/Proposed Plant Species ...................................................... 28 4.2. Federally-Listed/Proposed Animal Species .................................................. 29 4.2.1. California Red-Legged Frog .................................................................. 29 4.2.1.1. Survey Results .................................................................................... 30 4.2.1.2. Critical Habitat ................................................................................... 31 4.2.1.3. Avoidance and Minimization Efforts ................................................. 31 4.2.1.4. Project Effects ..................................................................................... 37 4.2.1.5. Modifications to the Project to Mitigate Effects ................................ 37 4.2.1.6. Cumulative Effects (FESA) ................................................................ 37 4.2.2. South/Central California Coast Steelhead DPS ..................................... 37 4.2.2.1. Survey Results .................................................................................... 39 4.2.2.2. Critical Habitat ................................................................................... 40 4.2.2.3. Avoidance and Minimization Efforts ................................................. 40 4.2.2.4. Project Effects ..................................................................................... 43 4.2.2.5. Modifications to the Project to Mitigate Effects ................................ 43 4.2.2.6. Cumulative Effects (FESA) ................................................................ 43 4.2.3. Morro Shoulderband Snail ..................................................................... 44 4.2.3.1. Survey Results .................................................................................... 45 Morro Creek Multi-Use Trail and Bridge Project v Table of Contents 4.2.3.2. Critical Habitat .................................................................................... 45 4.2.3.3. Avoidance and Minimization Efforts .................................................. 45 4.2.3.4. Project Effects ..................................................................................... 47 4.2.3.5. Modifications to the Project to Mitigate Effects ................................. 47 4.2.3.6. Cumulative Effects (FESA) ................................................................. 47 4.3. Habitat Restoration and Construction Monitoring Plan ................................. 47 4.3.1. Habitat Restoration Plan ......................................................................... 48 4.3.2. Construction Monitoring Plan................................................................. 48 Chapter 5. Conclusions and Determinations