Defensible Space Environmental Analysis
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United States Department of Agriculture Defensible Space Project Forest Service Environmental Pacific Southwest Region Assessment November 2014 Angeles National Forest For More Information Contact: Diane Travis Angeles National Forest 701 N Santa Anita Avenue Arcadia, CA 91006-2725 Phone: 760-249-6005 The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means of communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TTY). 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Printed on recycled paper – November 2014 Contents Chapter 1 – Introduction ........................................................................................................ 1 Background ........................................................................................................................................... 1 Existing Laws and Direction ............................................................................................................ 3 State and County Fire Laws and Ordinances ....................................................................................... 3 Forest Service Direction ............................................................................................................................... 6 Purpose of and Need for Action ..................................................................................................... 6 Summary of Proposed Action ......................................................................................................... 7 Decision Framework .......................................................................................................................... 8 Public Involvement ............................................................................................................................ 8 Issues ....................................................................................................................................................... 9 Chapter 2 - Alternatives ....................................................................................................... 11 Alternatives Considered in Detail .............................................................................................. 11 Alternative 1, No Action ............................................................................................................................ 11 Alternative 2, Proposed Action .............................................................................................................. 11 Alternatives Considered but Eliminated from Detailed Study ........................................ 19 Original Proposed Action .......................................................................................................................... 19 Retrofit Existing or Add New Facilities ............................................................................................... 19 Comparison of Alternatives .......................................................................................................... 20 Chapter 3 - Environmental Consequences .................................................................... 23 Wildfire and Fuels ............................................................................................................................ 23 Background and Affected Environment ............................................................................................. 23 Environmental Consequences ................................................................................................................ 27 Botany .................................................................................................................................................. 31 Cumulative Effects Boundary .................................................................................................................. 31 Special Status Plant Species - Threatened and Endangered Plant Species .......................... 32 Invasive Plant Species ................................................................................................................................ 37 Wildlife ................................................................................................................................................ 43 Cumulative Effects Boundary .................................................................................................................. 43 Special Status Wildlife Species ............................................................................................................... 43 Water Quality .................................................................................................................................... 65 Affected Environment ................................................................................................................................ 65 Environmental Consequences ................................................................................................................ 65 Consequences Relative to Significance .................................................................................... 67 Context.............................................................................................................................................................. 67 Intensity ........................................................................................................................................................... 68 Chapter 4 - Consultation and Coordination .................................................................. 73 ID Team Members:........................................................................................................................... 73 Federal, State and Local Officials/ Agencies and Tribes .................................................... 73 Chapter 5 - References ......................................................................................................... 75 Appendix A – Response to Scoping Comments Received ......................................... 84 Appendix B – Projects, Activities, and Factors Considered in Cumulative Effects .................................................................................................................................................... 100 Appendix C – Angeles National Forest Invasive Species List ................................. 103 Appendix D—Project Area Detail Maps ....................................................................... 105 Angeles National Forest Defensible Space Project Environmental Assessment List of Figures Figure 1. The Springs fire in the Santa Monica Mountains National Recreation Area burned into defensible space (National Park Service photo). ....................................................... 3 Figure 2. Angeles National Forest Defensible Space Project Area and Potential Treatment Areas. ................................................................................................................................ 4 Figure 3. Defensible Space information from the “Ready, Set, Go” program .......................... 5 Figure 4. Fireline interpretations chart for dense chaparral. ................................................... 29 List of Tables Table 1. Vegetation types on the ANF which are growing within the 300’ distance from structures near the ANF boundary. (GIS corporate database, scale is to 30-m) ............. 12 Table 2. Summary table of potential structures and acres of NFS lands involved assuming 200-foot or 300-foot defensible space distances. ............................................................ 14 Table 3. Comparison of alternatives considered in detail analysis. ........................................ 20 Table 4. Existing condition flame length interpretations and extents within 300-foot treatment zone. ................................................................................................................................ 24 Table 5. 90th percentile fire weather by weather zone. ............................................................ 25 Table 6. Total acres in each surface fuel model and weather zone for the project area within a 300-foot treatment zone. ................................................................................................. 26 Table 7. Desert-side (Weather Zone) modeled flame lengths................................................. 27 Table 8. Western Front Country (Weather Zone) modeled flame lengths. .............................. 28 Table 9. North of Highway 14 (Weather Zone) modeled flame lengths. ................................ 28 Table 10. Summary of federally listed plant species considered in this analysis. .................. 32 Table 11. Summary of federally listed wildlife species considered in this analysis.