Environmental Documents: EA/EIS & Associated Documents

Idaho | Oregon | Washington | Columbia River Basin | Wyoming | Montana

Idaho

Project Date Status
American Falls Resource Management Plan: CPN-EA-2026-02 12/2025 Scoping
Poison Creek Marina Facilities Project: CPN EA 2025-03 07/2025 FONSI
Rainey Park Stream Restoration and Wetland Creation Project: CPN EA 2025-7 06/2025 FONSI
Nampa & Meridian Irrigation District Ridenbaugh Canal Headworks Modernization Project: CPN-EA 2025-05 06/2025 FONSI
Boat Ramp Facility Construction on Snake River Near McTucker Creek 07/2024 Cancelled
New York Canal Lining Project: CPN FONSI # 24-01 02/2024 FONSI
Big Wood River Diversion Dam (Diversion 45) Remediation and Fish Passage Project 09/2023 FONSI
Reconnect Canyon Creek to the Teton River and Restore Instream Flows Project 09/2023 FONSI
Project Date Status
Warm Springs Preserve Restoration and Enhancement Project Ketchum, Idaho: CPN-EA-2025-05 10/2022 Scoping
Rocky Mountain Power 345-kV Goshen to Kinport Transmission Line Right-of-Way Grants Project: CPN FONSI #22-10 10/2022 FONSI
Hayden Lake Irrigation District Title Transfer EA and FONSI 10/2022 FONSI
Buxton Streambank Restoration & Desert Canal Fish Screen Projects 10/2022 FONSI
Tex Creek Wildlife Management Area Instream Habitat Improvement Project 10/2022 FONSI
Minidoka South Gated Spillway Erosion Repair and Prevention Project 08/2022 FONSI
American Falls Concrete Spillway Rehabilitation Project 05/2022 FONSI
Kings Spill Environmental Assessment 03/2022 FONSI
Anderson Ranch Turbine Modernization and Runner Replacement Project 03/2022 FONSI
Sedimentation and Phosphorus Removal Ponds Project 10/2020 FONSI
Linderman Dam Restoration on the Teton River 05/2020 FONSI
Boise River Basin Feasibility Study (Anderson Ranch Dam Raise):CPN-EIS 2024-02 08/2019 Scoping
Proposed Increase in Discharge from Sorrento Lactalis Plant 04/2019 FONSI
Snake River Plain Aquifer Wells Project Falls Irrigation District 12/2018 FONSI
Minidoka Powerplant Unit 7 Structure Maintenance & Rehabilitation 08/2018 FONSI
Pioneer Irrigation District and City of Caldwell Proposed Title Transfer 07/2018 FONSI
Boardman to Hemingway Transmission Line Project Final EIS 02/2018 ROD
Lewiston Orchards Project Water Exchange & Title Transfer 02/2017 FONSI
Minidoka Boat Ramp Replacement 01/2017 FONSI
Black Canyon Dam Third Hydroelectric Generating Unit Project 06/2016 FONSI
Paleontological Resource Excavation at American Falls 09/2015 FONSI
A&B Irrigation District - Unit A Pumping Plant #2 FONSI 01/2015 FONSI
Purchase of Contract Entitlement in Deadwood Reservoir for Salmon Flow Augmentation 01/2012 FONSI
Ririe Dam and Reservoir Proposed Interim Operations Environmental Assessment and FONSI 01/2011 FONSI
Minidoka Dam Spillway Replacement Project EIS 08/2010 Final
Repairs to Deadwood Dam Access Bridge and Operational Changes to Support Research Activities EA 08/2010 FONSI
Little Wood River Irrigation District Pressurized Pipeline Irrigation Delivery System Draft EA 03/2010 Draft EA
Pioneer Irrigation District Title Transfer Proposal EA and FONSI 12/2007 FONSI
Fort Hall National Historic Landmark Bank Stabilization Project EA and FONSI 06/2007 FONSI
Poison Creek Campground Replacement Project Environmental Assessment 05/2007 Draft EA
Teton River Canyon RMP/FONSI/EA 12/2006 RMP
Idaho Irrigation District Lands Inclusion/Exclusion EA 04/2006 Draft EA
Partial Assignment of New Union Ditch Company Ltd.'s Contract Entitlement in Lucky Peak Reservoir FONSI/EA 11/2005 FONSI
American Falls Reservoir District #2 Proposed Title Transfer EA 09/2005 FONSI
Minidoka North Side RMP/FONSI/EA 01/2005 RMP
Fremont-Madison Irrigation District Title Transfer EA 09/2004 FONSI
Black Canyon Reservoir & Montour Wildlife Management Area RMP/FONSI/EA 07/2004 RMP
Lucky Peak Water Service Contracts Renewal or Conversion EA and FONSI 04/2004 FONSI
Programmatic EA for Implementing Fish Habitat Improvement Measures in Four Mountain Snake Province Subbasins 04/2003 FONSI
Lake Cascade RMP/FONSI/EA 02/2002 RMP
Ririe Reservoir RMP/FONSI/EA 11/2001 RMP

Oregon

Project Date Status
Ochoco Irrigation District Partial Title Transfer: CPN FONSI #22-02 04/2024 FONSI
Scoggins Dam Safety Modifications Project: CPN-EIS 2024-01 04/2025 Cancelled
Stanfield Irrigation District Consumptive Use Contract: CPN FONSI #19-02 01/2024 FONSI
Arnold Irrigation District Flow Measurement Modernization 05/2023 —
Project Date Status
North Unit Irrigation District Piping Project 08/2022 —
Central Oregon Irrigation District Agreements Documents 07/2019 PA
Central Oregon Irrigation District Brookswood Piping Project 01/2018 FONSI
Instream Habitat Restoration in Bear Creek and Little Butte Creek Watersheds: Bear Creek Project 24.7 06/2017 FONSI
Rustic Cabins at Indian Creek Campground EA & FONSI 05/2017 FONSI
Howard Prairie Dam Safety of Dams Seismic Corrective Action FONSI 03/2017 FONSI
Instream Habitat Restoration in Bear Creek and Little Butte Creek Watersheds: Neil Creek Project 2.0 07/2016 FONSI
Instream Habitat Restoration in Bear Creek and Little Butte Creek Watersheds: South Fork Little Butte Creek Project 1.3 06/2016 FONSI
Instream Habitat Restoration in Bear Creek and Little Butte Creek Watersheds: South Fork Little Butte Creek Project 2.2 06/2016 FONSI
Instream Habitat Restoration in Bear Creek and Little Butte Creek Watersheds 07/2015 FONSI
Junction City Water Control District Long-Term Irrigation Water Service Contract Environmental Assessment and FONSI 06/2013 FONSI
Camper's Cove Resort Final Environmental Assessment and FONSI 01/2013 FONSI
West Extension Irrigation District Boundary Adjustment Final EA and FONSI 09/2012 FONSI
City of Hermiston Recycled Water Pipeline and Outfall License Agreement Draft Environmental Assessment 04/2011 FONSI
Tumalo Feed Canal Piping Project Environmental Assessment 07/2010 FONSI
One Year Water Rental from Skyline Farms for Salmon Flow Augmentation FONSI 04/2010 FONSI
Arthur R. Bowman Dam Safety of Dams Modifications Environmental Assessment and FONSI 02/2010 FONSI
Proposed Water Service Contract Palmer Creek Water District Improvement Company Environmental Assessment 04/2009 FONSI
Klum Landing Campground Improvement Project EA and FONSI 03/2009 FONSI
Central Oregon Irrigation District Water Conservation Project EA and FONSI 11/2007 FONSI
Greenberry Irrigation District Proposed Water Service Contract EA 06/2007 FONSI
Request for Contract to Conduct Mining Activities in the Sucker Creek Withdrawal 03/2007 FONSI
Powder House Cove Expansion Environmental Assessment 10/2006 FONSI
Indian Rock Estates Access Road Easement EA 09/2006 FONSI
Proposed Wanapa Energy Center Record of Decision 07/2005 ROD
Farmers Irrigation District Lower Distribution Pressurization Project EA 04/2005 EA
Prineville Reservoir Repeater Tower Draft EA 04/2005 Draft EA
Larson Creek Pipeline and Fish Passage Project FONSI 09/2004 FONSI
Proposed Boundary Adjustment for the Westland Irrigation District FONSI 06/2004 FONSI
Henry Hagg Lake RMP/FONSI/EA 05/2004 FONSI
Tyler Creek Wasteway Stabilization Programmatic EA 03/2004 FONSI
Programmatic EA for Implementing Fish Habitat Improvement Measures in Three John Day Subbasins 05/2003 FONSI
Prineville Reservoir RMP/FONSI/EA 05/2003 RMP

Washington

Project Date Status
Emergency Stabilization and Rehabilitation Plan Programmatic EA: CPN-EA 2025-04 06/2026 FONSI
Royal Slope Solar Transmission CPN-EA-2024-01 06/2026 Final EA
Wanapum – Mountain View 230 kV Transmission Line Project 05/2026 Scoping
Conconully Safety of Dams: CPN-EA-2024-03 03/2026 FONSI
Programmatic Environmental Assessment Addressing Federal Support of the Phase 2 Implementation Plan (P2IP) CPN-EA-2024-02 05/2025 FONSI
Clear Creek Dam Fish Passage Project; CPN FONSI #23-04. 04/2024 FONSI
Project Date Status
Reclaimed Water Distribution Cheny Purple Pipe Project EA and FONSI 10/2022 FONSI
Kachess Dam - Safety of Dams Modification Project EA 09/2022 FONSI
Grand Coulee Security Response Force Upgrades Project 02/2023 Cancelled
Acquisition of Grant County Parcel 170934000 EA and FONSI 11/2021 —
Kennewick Irrigation District Title Transfer 06/2021 FONSI
Surface Water Intake Fish Screens and Fish Passage (SWISP) Project 04/2021 ROD
Changes to Recreational Use in the Reclamation Zone at Grand Coulee Power Office 06/2019 FONSI
Cayuse Cove Slope Stabilization Project 05/2019 FONSI
Pasco Pump Lateral Wasteway 5.8 Piping Project 03/2019 FONSI
Keechelus-to-Kachess Conveyance Project 03/2019 FEIS
Kachess Drought Relief Pumping Plant Project 03/2019 FEIS
Third Power Plant G19-G20 Modernization Project 02/2019 FONSI
Marble Beach Bank Stabilization Project 10/2018 FONSI
Snow Lake Water Control Structure 09/2018 FONSI
Grand Coulee G1 through G18 Generating Units Modernization and Overhaul Draft EA 08/2018 FONSI
Middle Entiat Habitat Improvement Project 02/2018 FONSI
City of Quincy 5-Year Nonagricultural Discharge Authorization 08/2017 FONSI
Record of Decision for the Vantage to Pomona Heights 230 kV Transmission Line Project, Final EIS 01/2017 ROD
Consent to Use Permit Fiber Optic Project Environmental Assessment 02/2016 FONSI
Cle Elum Pool Raise Project 05/2015 Final EIS
Record of Decision for the Yakima River Basin Water Resource Management Plan Final Programmatic EIS 07/2013 ROD
Record of Decision for the Odessa Subarea Special Study Final Environmental Impact Statement 04/2013 ROD
Odessa Subarea Special Study Final Environmental Impact Statement 08/2012 ROD
Hidden Beach Stabilization Project EA and FONSI 07/2012 FONSI
Yakima River Basin Integrated Water Resource Management Plan Final PEIS 03/2012 Final PEIS
John W. Keys III Pump-Generating Plant Modernization Final EA and FONSI 03/2012 FONSI
Cle Elum Fish Passage Facilities and Fish Reintroduction Project EIS 08/2011 ROD
Grand Coulee's Third Powerplant 500-Kilovolt Transmission Line Replacement Project EA (BPA document) 05/2011 FONSI
Entiat River Offstream Water Wells Implementation EA and FONSI 09/2010 FONSI
Preston Reach Habitat Complexity Project – Phase 1 EA and FONSI 08/2010 FONSI
Steamboat Rock State Park Campground Addition Environmental Assessment 03/2010 FONSI
Sunnyside Division RRM Water Conservation Project Environmental Assessment 03/2010 FONSI
Sunnyside Division Phase 2 Conservation Plan EA and FONSI 09/2009 FONSI
Upper Columbia Alternative Flood Control and Fish Operations EIS 08/2009 ROD
Lake Roosevelt Incremental Storage Releases Project FONSI and EA 06/2009 FONSI
Yakima River Basin Water Storage Feasibility Study Planning Report and EIS 12/2008 EIS
Benton Irrigation District Water Conservation Program Feasibility Study Environmental Assessment and FONSI 10/2008 FONSI
Cline Irrigation District Water Conservation Project FONSI 01/2008 FONSI
Potholes Reservoir Supplemental Feed Route FONSI and EA 08/2007 FONSI
Sunnyside Division Board of Control Water Conservation Program EA 09/2004 FONSI
Banks Lake Drawdown EIS 06/2004 ROD
Potholes Reservoir RMP/ROD/EIS 08/2002 RMP
Banks Lake Resource Management Plan 07/2001 RMP

Columbia River Basin

Project Date Status
Columbia River System Operations Environmental Impact Statement 09/2020 ROD

Wyoming

Project Date Status
Sunroc Corporation Proposed Expanded Permit Area (Amendment to Existing Land Use Permit 11-07-14-LA705): CPN-EA 2025-02 07/2025 FONSI
WYDOT Use Authorization: Gravel Extraction and Processing at Alpine Bear Pit 04/2017 FONSI

Montana

Project Date Status
Hungry Horse Powerplant Modernization & Overhaul Project 11/2018 FONSI
Upper Columbia Alternative Flood Control and Fish Operations EIS 08/2009 ROD
Last Update:12/19/25