ENVIRONMENTAL ASSESSMENT CACHIL DEHE BAND OF WINTUN INDIANS OF THE COLUSA INDIAN COMMUNITY FEE-TO-TRUST MARCH 2010 PREPARED FOR: ENVIRONMENTAL ASSESSMENT CACHIL DEHE BAND OF WINTUN INDIANS OF THE COLUSA INDIAN COMMUNITY FEE-TO-TRUST MARCH 2010 LEAD AGENCY: PREPARED BY: U.S. Department of the Interior Analytical Environmental Services Bureau of Indian Affairs 1801 7th Street, Suite 100 Pacific Regional Office Sacramento, CA 95811 2800 Cottage Way, Room W-2820 (916) 447-3479 Sacramento, CA 95825-1846 www.analyticalcorp.com TABLE OF CONTENTS COLUSA FEE-TO-TRUST ENVIRONMENTAL ASSESSMENT 1.0 INTRODUCTION 1.1 Introduction ...................................................................................................................... 1-1 1.2 Location and Setting ........................................................................................................ 1-1 1.3 Purpose and Need for the Proposed Action ..................................................................... 1-6 1.4 Overview of the Environmental Process .......................................................................... 1-6 1.5 Environmental Issues Addressed ..................................................................................... 1-7 1.6 Regulatory Requirements and Approvals ........................................................................ 1-7 2.0 PROPOSED PROJECT AND ALTERNATIVES 2.1 Alternative A .................................................................................................................... 2-1 2.2 Alternative B .................................................................................................................... 2-5 2.3 Alternative C .................................................................................................................... 2-7 2.4 Comparision of the Proposed Project and Alternatives ................................................... 2-7 3.0 DESCRIPTION OF AFFECTED ENVIRONMENT 3.1 Land Resources ................................................................................................................ 3-1 3.2 Water Resources .............................................................................................................. 3-7 3.3 Air Quality ..................................................................................................................... 3-13 3.4 Biological Resources ..................................................................................................... 3-16 3.5 Cultural Resources ......................................................................................................... 3-33 3.6 Socioeconomic Conditions / Environmental Justice ...................................................... 3-41 3.7 Transportation and Circulation ...................................................................................... 3-45 3.8 Land Use ........................................................................................................................ 3-47 3.9 Public Services ............................................................................................................... 3-52 3.10 Noise .............................................................................................................................. 3-56 3.11 Hazardous Materials ...................................................................................................... 3-59 3.12 Visual Resources ............................................................................................................ 3-60 4.0 ENVIRONMENTAL CONSEQUENCES 4.1 Alternative A .................................................................................................................... 4-1 4.2 Alternative B .................................................................................................................. 4-16 4.3 Alternative C .................................................................................................................. 4-23 4.5 Cumulative Effects ........................................................................................................ 4-25 4.6 Indirect And Growth-Inducing Effects .......................................................................... 4-29 5.0 MITIGATION MEASURES 5.1 Land Resources ................................................................................................................ 5-1 5.2 Water Resources .............................................................................................................. 5-1 5.3 Air Quality ....................................................................................................................... 5-2 5.4 Biological Resources ....................................................................................................... 5-2 5.5 Cultural Resources ........................................................................................................... 5-5 5.6 Socioeconomic Conditions / Environmental Justice ........................................................ 5-5 Analytical Environmental Services i Colusa Fee-to-Trust 209520 Environmental Assessment Table of Contents 5.7 Transportation and Circulation ........................................................................................ 5-5 5.8 Land Use .......................................................................................................................... 5-5 5.9 Public Services ................................................................................................................. 5-5 5.10 Noise ................................................................................................................................ 5-6 5.11 Hazardous Materials ........................................................................................................ 5-6 5.12 Visual Resources .............................................................................................................. 5-6 6.0 CONSULTATION, COORDINATION AND LIST OF PREPARERS 6.1 Federal Agencies Consulted ............................................................................................ 6-1 6.2 State Agencies Consulted ................................................................................................ 6-1 6.3 Tribes Consulted .............................................................................................................. 6-1 6.4 Local Agencies Consulted ............................................................................................... 6-2 6.5 Preparers of Environmental Assessment ......................................................................... 6-2 7.0 BIBLIOGRAPHY ............................................................................................................................ 7-1 LIST OF TABLES 1-1 Assessor’s Parcel Numbers and Acreage for Project Site Parcels ................................... 1-5 3-1 Project Site Soils .............................................................................................................. 3-2 3-2 Water Quality Objectives of Inland Surface Waters ...................................................... 3-11 3-3 1% of Average Streamflow (CF/S) at USGS Gauging Station #11389500 ................... 3-12 3-4 National Ambient Air Quality Standards and Colusa County Attainment Status.......... 3-15 3-5 Summary of Habitat Types Within the Project Site ....................................................... 3-21 3-6 Regionally Occurring Federally Listed Special-Status Species ..................................... 3-24 3-7 Colusa County Population 2000-2009 ........................................................................... 3-42 3-8 Cachil Dehe Band of Wintun Indians Population and Labor Force Estimates .............. 3-42 3-9 Level of Service for Unsignalized Intersections ............................................................ 3-46 3-10 Existing Level of Service and Average Delay of Study Intersections ........................... 3-47 3-11 Colusa Unified School District Public Schools ............................................................. 3-55 3-12 Recommended Noise Levels for Land Uses .................................................................. 3-57 4-1 Property Taxes for the Proposed Trust Parcels ................................................................ 4-9 4-2 Typical Construction Noise Levels ................................................................................ 4-14 LIST OF FIGURES 1-1 Regional Location ............................................................................................................ 1-2 1-2 Site and Vicinity .............................................................................................................. 1-3 1-3 Aerial Parcel Map ............................................................................................................ 1-4 2-1 Site Plan — Alternative A ............................................................................................... 2-3 2-2 Site Plan — Alternative B ............................................................................................... 2-6 3-1 Regional Fault Map ......................................................................................................... 3-3 3-2 Soils Map ......................................................................................................................... 3-4 3-3 FEMA Flood Zones ........................................................................................................