Show on map
Wanapum — Power plant · Hydro · PUD No 2 of Grant County - (WA)Royal Slope — Permitted · Solar + storage · WA · 520 MW · 2.4 mi away
  • Clean firm
  • Wind & solar
  • In development
  • Operating
  • 10 · 100 · 1,000 MW

Wanapum

Power plant · Hydro

Key facts

Power plant · Hydroran 42% of 2025 Operating
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
2011
Net generation, 2025
4,437,537 MWh
Grid
230 kV to PUD No 2 of Grant County (GCPD)
Location
Grant County, Washington
Operated by
PUD No 2 of Grant County - (WA)SourceEIA-860M Preliminary Monthly Electric Generator Inventory

Output

Net generation MWh by year, 2001 to 2026

Operations detail

Details

Who’s behind it

No companies named in filings yet.

Interested in this project?

Set an alert Book a call Join the beta

Our team gets you what you need.

Beta: private project space · data room · readiness check

Technology
Hydro source: “Conventional Hydroelectric”
Age
15 years since 2011
All 5 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
AttributeValue
Gem
Unit ids
G100000603994, G100001030968
Location id
L100000603956
Fuel burned (MMBtu), 202515,140,877
Capacity factor, 20250.415
Net generation (MWh), 20254,437,537
Balancing authority codeGCPD

Retirement

EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.
Capacity retired
1,038 MW
Generators retired
10
Capacity still in service
1,220 MW
GeneratorTechnologyNameplateStateDate
7Conventional Hydroelectric103.8 MWRetiredJune 2010
5Conventional Hydroelectric103.8 MWRetiredApril 2011
2Conventional Hydroelectric103.8 MWRetiredFebruary 2012
1Conventional Hydroelectric103.8 MWRetiredDecember 2012
10Conventional Hydroelectric103.8 MWRetiredOctober 2013
9Conventional Hydroelectric103.8 MWRetiredAugust 2014
6Conventional Hydroelectric103.8 MWRetiredAugust 2015
3Conventional Hydroelectric103.8 MWRetiredAugust 2016
8Conventional Hydroelectric103.8 MWRetiredAugust 2017
4Conventional Hydroelectric103.8 MWRetiredAugust 2019

Grid

EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).
Grid voltage at the plant
230 kV
Transmission or distribution system owner
PUD No 2 of Grant County
Balancing authority
Public Utility District No. 2 of Grant County, Washington
NERC region
WECC
Can the connection be reused?

A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.

Timeline

  • Stated Unit 4 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 8 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 3 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 6 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 9 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 10 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 1 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 2 scheduled to retire, 103.8 MW · EIA-860M
  • Stated Unit 5 scheduled to retire, 103.8 MW · EIA-860M
  • In service · EIA-860M
  • Stated Unit 7 scheduled to retire, 103.8 MW · EIA-860M

Sources

4 sources

Sources EIA-860M · GEM · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory

Sources

  • EIA-860MOpen license · retrieved Nov 4, 2026
  • GEMOpen license, with credit · retrieved Oct 26, 2026Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
  • EIAOpen license · retrieved Nov 1, 2026Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
  • EIA-860M Preliminary Monthly Electric Generator Inventory

Every source and license · Attribution

View at source

Around this plant

Nearby

within 15 mi
ProjectKindAwayMW
Royal Slope Permitted Solar + storage 2.4 mi 520

Sources EIA-860M

Sources

  • EIA-860MOpen license · retrieved Nov 4, 2026

Attribution