Draft Environmental Assessment Land Acquisition Project Nampa Municipal Airport May 2020 Prepared By: Table of Contents Chapter 1. Background and Proposed Action ................................................................................. 1 1.1 Introduction .......................................................................................................................... 1 1.2 Background and Existing Facilities ........................................................................................ 1 1.2.1 Incompatible Land Uses in Runway 11 RPZ ................................................................... 3 1.3 Existing Operations ............................................................................................................... 6 1.4 Airport Forecasts ................................................................................................................... 6 1.5 Proposed Action .................................................................................................................... 6 Chapter 2 Purpose and Need .......................................................................................................... 9 2.1 Purpose and Need ................................................................................................................. 9 2.2 Need for the Proposed Action .............................................................................................. 9 2.3 Requested Federal Actions ............................................................................................ 11 Chapter 3 Alternatives .................................................................................................................. 12 3.1 Alternatives Considered ...................................................................................................... 12 3.2 Alternatives Being Evaluated in this EA .............................................................................. 12 3.2.1 No Action Alternative ................................................................................................. 12 3.2.2 Proposed Action .......................................................................................................... 12 Chapter 4 Affected Environment & Environmental Consequences ............................................. 14 4.1 Introduction ........................................................................................................................ 14 4.2 Air Quality ........................................................................................................................... 14 4.2.1 Affected Environment .................................................................................................. 15 4.2.2 Analysis ........................................................................................................................ 15 4.2.3 Environmental Consequences ..................................................................................... 15 4.2.4 Mitigation ..................................................................................................................... 15 4.3 Biological Resources............................................................................................................ 15 4.3.1 Affected Environment .................................................................................................. 16 4.3.2 Analysis ........................................................................................................................ 17 4.3.3 Environmental Consequences ..................................................................................... 17 4.3.4 Mitigation ..................................................................................................................... 17 4.4. Climate ............................................................................................................................... 17 4.4.1 Affected Environment .................................................................................................. 17 4.3.2 Analysis ........................................................................................................................ 17 4.3.3 Environmental Consequences ..................................................................................... 18 4.3.4 Mitigation ..................................................................................................................... 18 4.4 Coastal Resources ............................................................................................................... 18 4.5 Department of Transportation Act Section 4(f) Resources ................................................ 18 4.5.1 Affected Environment .................................................................................................. 19 4.5.2 Analysis ........................................................................................................................ 20 4.5.3 Environmental Consequences ..................................................................................... 21 4.5.4 Mitigation ..................................................................................................................... 22 4.6 Farmlands ............................................................................................................................ 22 4.6.1 Affected Environment .................................................................................................. 23 4.6.2 Analysis ........................................................................................................................ 23 4.6.3 Environmental Consequences ..................................................................................... 23 4.6.4 Mitigation ..................................................................................................................... 24 4.7 Hazardous Materials, Pollution Prevention, and Solid Waste ............................................ 24 4.7.1 Affected Environment .................................................................................................. 24 4.7.2 Analysis ........................................................................................................................ 24 4.7.3 Environmental Consequences ..................................................................................... 25 4.7.4 Mitigation ..................................................................................................................... 25 4.8 Historical, Architectural, Archaeological, and Cultural Resources ..................................... 25 4.8.1 Affected Environment .................................................................................................. 26 4.8.2 Analysis ........................................................................................................................ 26 4.8.3 Environmental Consequences ..................................................................................... 27 4.8.4 Mitigation ..................................................................................................................... 28 4.9 Land Use .............................................................................................................................. 28 4.9.1 Affected Environment .................................................................................................. 28 4.9.2 Analysis ........................................................................................................................ 28 4.9.3 Environmental Consequences ..................................................................................... 29 4.9.4 Mitigation ..................................................................................................................... 29 4.10 Natural Resources and Energy Supply .............................................................................. 29 4.10.1 Affected Environment ................................................................................................ 30 4.10.2 Analysis ...................................................................................................................... 30 4.10.3 Environmental Consequences ................................................................................... 30 4.10.4 Mitigation ................................................................................................................... 30 4.11 Noise and Compatible Land Use ....................................................................................... 30 4.11.1 Affected Environment ................................................................................................ 31 4.11.2 Analysis ...................................................................................................................... 31 4.11.3 Environmental Consequences ................................................................................... 31 4.11.4 Mitigation ................................................................................................................... 32 4.12 Socioeconomics, Environmental Justice, and Children’s Health and Safety Risks ........... 32 4.12.1 Affected Environment ................................................................................................ 32 4.12.2 Analysis ...................................................................................................................... 33 4.12.3 Environmental Consequences ..................................................................................