Supplement Analysis

SUPPLEMENT ANALYSIS WESTERN AREA POWER ADMINISTRATION SACRAMENTO VALLEY RIGHT-OF-WAY MAINTENANCE PROGRAM ENVIRONMENTAL ASSESSMENT DOE/EA-1395-SA-01 FINAL SIERRA NEVADA REGION U.S. DEPARTMENT OF ENERGY 114 Parkshore Drive Folsom, CA 95630 April 2021 SUPPLEMENT ANALYSIS WESTERN AREA POWER ADMINISTRATION SACRAMENTO VALLEY RIGHT-OF-WAY MAINTENANCE PROGRAM ENVIRONMENTAL ASSESSMENT DOE/EA-1395-SA-01 Final WESTERN AREA POWER ADMINISTRATION SIERRA NEVADA REGION U.S. DEPARTMENT OF ENERGY 114 Parkshore Drive Folsom, CA 95630 April 2021 SUPPLEMENT ANALYSIS Western Area Power Administration Sacramento Valley Right-Of-Way Maintenance Program Environmental Assessment CONTENTS Chapter 1 Introduction .................................................................................................................... 1-1 1.1 Background ...................................................................................................................... 1-1 1.2 Purpose and Need for the Sacramento Valley Program ................................................... 1-1 1.3 Purpose and Need for the Supplemental Analysis ........................................................... 1-2 Chapter 2 Review of Project Changes............................................................................................ 2-1 2.1 Changes in the Project Area and Project Activities ......................................................... 2-1 2.1.1 Changes in Project Area ...................................................................................... 2-3 2.1.2 Changes in Project Activities .............................................................................. 2-4 Chapter 3 Analysis ........................................................................................................................... 3-1 3.1 Introduction ...................................................................................................................... 3-1 3.2 Analysis ........................................................................................................................... 3-1 3.2.1 Land Use ............................................................................................................. 3-7 3.2.2 Habitats and Vegetation ...................................................................................... 3-8 3.2.3 Wildlife ............................................................................................................... 3-9 3.2.4 Special-Status Species ...................................................................................... 3-10 3.2.5 Fisheries ............................................................................................................ 3-16 3.2.6 Geology and Soils ............................................................................................. 3-16 3.2.7 Air Quality ........................................................................................................ 3-17 3.2.8 Water Quality .................................................................................................... 3-23 3.2.9 Public Health and Safety ................................................................................... 3-24 3.2.10 Recreation ......................................................................................................... 3-24 3.2.11 Cultural Resources ............................................................................................ 3-25 3.2.12 Paleontological Resources ................................................................................ 3-26 3.2.13 Aesthetics .......................................................................................................... 3-27 3.2.14 Noise ................................................................................................................. 3-27 3.2.15 Transportation ................................................................................................... 3-28 3.2.16 Environmental Justice ....................................................................................... 3-28 3.2.17 Intentional Destructive Acts ............................................................................. 3-29 3.2.18 Climate Change ................................................................................................. 3-30 Chapter 4 Conclusion ...................................................................................................................... 4-1 Chapter 5 Determination ................................................................................................................ 5-1 Chapter 6 References ....................................................................................................................... 6-1 FINAL TOC-i Contents LIST OF TABLES Table 2-1. Category A: Inspection and Minor Maintenance Activities 2-8 Table 2-2. Category B: Routine Maintenance Activities 2-12 Table 2-3. Category C: New Infrastructure 2-14 Table 2-4 Comparison of SOPs with Avoidance Measures from August 2005 Final EA 2-17 Table 3-1 Summary of the Results of the Analysis 3-1 Table 3-2 ESA and CESA Status Changes Since the August 2005 Final EA 3-12 Table 3-3 CESA Listing/Candidate Changes Since the August 2005 Final EA 3-13 Table 3-4 California and National Air Quality Standards for Air Pollutants 3-18 Table 3-5 Air Pollutant Designation for Counties within the Sacramento Valley Program Project Area 3-19 Table 3-6 Air Pollutant Thresholds of Significance 3-19 Table 3-7 Operations and Maintenance Equipment and Vehicles 3-20 Table 3-8 Sacramento Valley ROW Maintenance Emission Estimates 3-21 Table 3-9 Estimated GHG Emissions 3-32 LIST OF FIGURES Figure 1-1 Sacramento Valley EA Program Area APPENDICES Appendix A Sacramento Valley Program: Applicable Project Conservation Measures Appendix B Air Quality and Greenhouse Gas Emission Calculations TOC-ii FINAL SUPPLEMENT ANALYSIS ENVIRONMENTAL ASSESSMENT Western Area Power Administration Sacramento Valley Right-Of-Way Maintenance Program Acronyms and Abbreviations AAQS ambient air quality standards ACHP Advisory Council on Historic Preservation CAAQS California Ambient Air Quality Standards CARB California Air Resources Board CDFW California Department of Fish and Wildlife CESA California Endangered Species Act CNDDB California Natural Diversity Data Base CNPS California Native Plant Society CO carbon monoxide CO2 carbon dioxide CO2e carbon dioxide equivalents EA Environmental Assessment EAs Environmental Assessments EPA U.S. Environmental Protection Agency ESA federal Endangered Species Act FONSI Finding of No Significant Impact GIS geographic information system GHG greenhouse gas GPS global positioning system HR hydrologic region IEEE Institute of Electrical and Electronics Engineers IVM Integrated Vegetation Management kV kilovolt MOU Memorandum of Understanding MT/year metric tons per year NAAQS National Ambient Air Quality Standards NAGPRA Native American Graves Protection and Repatriation Act NERC North American Electric Reliability Council NHPA National Historic Preservation Act NO2 nitrogen dioxide NMFS National Oceanic and Atmospheric Administration, National Marine Fisheries Service NRHP National Register of Historic Places O3 Ozone O&M Operations and Maintenance PA Programmatic Agreement PCM Project Conservation Measure PCMs Project Conservation Measures PM particulate matter PM2.5 inhalable particulate matter less than 2.5 microns in diameter PM10 inhalable particulate matter less than 10 microns in diameter ppb parts per billion by volume ppm parts per million by volume ROW right-of-way ROWs rights-of-way FINAL PAGE i SUPPLEMENT ANALYSIS ENVIRONMENTAL ASSESSMENT Western Area Power Administration Sacramento Valley Right-Of-Way Maintenance Program RWQCBs Regional Water Quality Control Boards SA Supplement Analysis Sacramento Valley Program Sacramento Valley Right-of-Way Maintenance Program SHPO State Historic Preservation Officer SO2 sulfur dioxide SOPs Standard Operating Procedures TCPs traditional cultural properties USFWS U.S. Department of the Interior, Fish and Wildlife Service WAPA Western Area Power Administration WSCC Western Systems Coordinating Council μg/m3 micrograms per cubic meter of air. PAGE ii FINAL SUPPLEMENT ANALYSIS ENVIRONMENTAL ASSESSMENT Western Area Power Administration Sacramento Valley Right-Of-Way Maintenance Program Introduction Western Area Power Administration (WAPA), Sierra Nevada Region, has prepared this Supplement Analysis (SA) in accordance with the U.S. Department of Energy (DOE) National Environmental Policy Act (NEPA) regulations (10 CFR 1021.330(d) and (e)), and Council on Environmental Quality regulations which require an evaluation of the adequacy of “site-wide” NEPA documents at least every five years. This SA addresses the Final Environmental Assessment (EA) prepared by WAPA in August 2005 for the Sacramento Valley Right-of-Way Maintenance Program (Sacramento Valley Program) and provides the information and analysis necessary to determine if there have been any “substantial” changes in the proposed action and if there are any “significant” new circumstances or information relevant to environmental concerns and impacts. 1.1 Background WAPA is a power marketing administration of the DOE. WAPA owns, operates, and maintains all or a portion of seven 230-kilovolt (kV) transmission lines and one 115-kV transmission line in Placer, Sacramento, and Sutter counties, California (Figure 1-1). The Sacramento Valley Program is an ongoing operations and maintenance (O&M) project.

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