Columbia-Pacific Northwest Region Environmental Documents

Environmental Documents: EA/EIS & Associated Documents

Active Projects

Idaho Environmental Documents
Idaho	Status
Rainey Park Stream Restoration and Wetland Creation Project	10/2024 Scoping
Nampa & Meridian Irrigation District Ridenbaugh Canal Headworks Modernization Project	06/2025 FONSI
Boat Ramp Facility Construction on Snake River Near McTucker Creek	07/2024 Cancelled
Poison Creek Marina Facilities Project	07/2025 FONSI
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
Warm Springs Preserve Restoration and Enhancement Project Ketchum, Idaho	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 Disttrict Title Transfer	10/2022 FONSI
Hayden Lake Irrigation District Title Transfer	10/2022 EA
Buxton Streambank Restoration & Desert Canal Fish Screen Projects	10/2022 FONSI
Tex Creek Wildlife Management Area Instream Habitat Improvement Project	10/22 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 EA/FONSI
Boise River Basin Feasibility Study (Anderson Ranch Dam Raise):CPN-EIS 2024-02	08/2019 Scoping

Oregon	Status
Ochoco Irrigation District Partial Title Transfer: CPN FONSI #22-02	04/2024 FONSI
Stanfield Irrigation District Consumptive Use Contract: CPN FONSI #19-02	01/2024 FONSI
Scoggins Dam Safety Modifications Project: CPN-EIS 2024-01 - Scoping	01/2024
Arnold Irrigation District Flow Measurement Modernization	05/2023
North Unit Irrigation District Piping Project	08/2022

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

Washington	Status
Emergency Stabilization and Rehabilitation Plan Programmatic EA: CPN-EA 2025-04	6/2025 Scoping
License Renewal for Grant County Mosquito Control District #1 CPN-CCA-CE-2025-055	3/27/2025 CEC
Clear Creek Dam Fish Passage Project; CPN FONSI #23-04.	04/2024 FONSI
Royal Slopes Solar Transmission CPN-EA-2024-01	02/2024 Scoping
Programmatic Environmental Assessment Addressing Federal Support of the Phase 2 Implementation Plan (P2IP) CPN-EA-2024-02	5/2025 FONSI
Reclaimed Water Distribution Cheny Purple Pipe Project	10/2022 FONSI
Reclaimed Water Distribution Cheny Purple Pipe Project	10/2022 EA
Grand Coulee Security Response Force Upgrades Project	08/2022
Conconully Safety of Dams

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

Inactive Projects

Idaho Environmental Documents
Idaho	Status
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

Montana	Status
Hungry Horse Powerplant Modernization & Overhaul Project	11/2018 FONSI
Upper Columbia Alternative Flood Control and Fish Operations EIS	08/2009 ROD

Oregon	Status
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
One Year Water Rental from Skyline Farms for Salmon Flow Augmentation FONSI	04/2010 FONSI
Tumalo Feed Canal Piping Project Environmental Assessment	07/2010 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	Status
Acquisition of Grant County Parcel 170934000 EA and FONSI	11/2021
Kachess Dam - Safety of Dams Modification Project EA	09/2021
Kennewick Irrigation District Title Transfer	06/2021 FONSI
Surface Water Intake Fish Screens and Fish Passage (SWISP) Project	04/2021 ROD
Conconully Safety of Dams
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
Hidden Beach Stabilization Project EA and FONSI	07/2012 FONSI
Yakima River Basin Integrated Water Resource Management Plan Final PEIS	03/2012 Final PEIS
Grand Coulee's Third Powerplant 500-Kilovolt Transmission Line Replacement Project EA (BPA document)	05/2011 FONSI
Cle Elum Fish Passage Facilities and Fish Reintroduction Project EIS	08/2011 ROD
John W. Keys III Pump-Generating Plant Modernization Final EA and FONSI	03/2012 FONSI
Odessa Subarea Special Study Final Environmental Impact Statement	08/2012 ROD
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