# Grant County, Washington: Power, Data Centers and the Local Economy Home to Moses Lake, Ephrata and Quincy The data center boom is not abstract in Grant County: it is on the ground here. Its power plants have 9,098 MW of capacity, 100% of it hydro, the largest fleet in Washington. The SAVRN Data Center Map lists 27 data centers in Grant County, 24% of Washington's total. Grant County is home to Moses Lake, Ephrata, Quincy and Mattawa. 1 project is on the Delay Watchlist, including Grant County PUD Data Center Load Growth Cap. 650 MW of new generation is planned here across 3 units, led by Royal Slope Solar LLC (solar), the 2nd largest pipeline among Washington's counties. 130 MW of it is already under construction or built. 9,098 MW of operating power plants, mostly hydro 27 data centers on the SAVRN Data Center Map, 24% of Washington's 650 MW of new generation planned here, solar leading ## Cities and towns in Grant County Grant County is home to Moses Lake, Ephrata, Quincy and Mattawa. Moses Lake27,469 residents Ephrata8,834 residents Quincy8,510 residents Mattawa3,874 residents Warden2,830 residents Royal City1,896 residents Soap Lake1,817 residents George1,024 residents Electric City954 residents Grand Coulee947 residents Coulee City550 residents Wilson Creek204 residents Hartline175 residents Unincorporated communities (governed by the county): Banks Lake South, Beverly, Cascade Valley, Crescent Bar, Desert Aire, Lakeview, Marine View, Moses Lake North, Schwana, Sunland Estates, Wheeler. Residents are 2025 Census estimates for the part of each city, town or township inside this county. Census publishes no annual estimate for unincorporated communities. ## What changed in Grant County | Measure | Then | Now | Change | Rank in Washington | |---|---|---|---|---| | Population (2020 → 2025) | 99,446 | 105,727 | ▲ 6.3% | 13th of 39 by size | | Total jobs (2019 → 2025) | 39,967 | 42,301 | ▲ 5.8% | 10th of 39 by growth | | Average annual pay (2019 → 2025) | $44,201 | $66,316 | ▲ 50.0% | — | | Construction jobs (2019 → 2025) | 1,424 | 1,668 | ▲ 17.1% | 11th of 33 by growth | | Electrical contractor jobs (2019 → 2025) | 247 | 268 | ▲ 8.5% | — | | Data processing and hosting jobs (2019 → 2025) | 219 | 235 | ▲ 7.3% | — | | Unemployment rate (2019 → August 2026) | 7.3% | 5.3% | ▼ 2.0pts | — | | Generating capacity added since 2019 | — | 122 MW | | — | | Generating capacity retired since 2019 | — | 120 MW | | — | | Planned generation (Aug 2026) | — | 650 MW | 7% of today's fleet | 2nd of 11 by size | Unemployment was 5.3% in August 2026, against 7.3% in 2019. Construction employs 1,668, up 17.1% since 2019. 120 MW has retired here since 2019, including Wanapum (hydro, 104 MW, 2019). 122 MW of that came online in 2019 or later, mostly hydro. Electrical contractors employ 268, up 8.5% since 2019 against up 6.1% statewide, at an average $102,178 a year. Employers here counted 42,301 jobs in 2025, up 5.8% from 2019 (the 10th fastest growth of 39 Washington counties). Avista Corp is the largest utility serving Grant County, one of 5 with territory here. Its residential customers paid an average 11.87¢/kWh in 2024, above the 10.07¢ median for Washington utilities. 105,727 people live here, up 6.3% since 2020. ## Who powers Grant County ### Utilities with service territory in Grant County | Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales | |---|---|---|---|---|---| | Avista Corp | Investor Owned | Bundled | 246,055 | 11.87¢ | 37% | | PUD No 2 of Grant County | Political Subdivision | Bundled | 42,485 | 6.01¢ | 57% | | Big Bend Electric Coop, Inc | Cooperative | Bundled | 5,841 | 9.10¢ | 21% | | Bonneville Power Administration | Federal | Bundled | — | — | 56% | | City of Coulee Dam - (WA) | — | — | — | — | — | Customer counts, prices and sales shares cover each utility's whole system in the state, not only this county. Commercial sales include data centers. ### Operating power plants | Technology | Capacity | Share | |---|---|---| | Hydro | 9,098 MW | 100% | | Largest plants | Owner | Technology | MW | Since | |---|---|---|---|---| | Grand Coulee | U S Bureau of Reclamation | Hydro | 6,809 MW | 1941 | | Wanapum | PUD No 2 of Grant County - (WA) | Hydro | 1,220 MW | 2011 | | Priest Rapids | PUD No 2 of Grant County - (WA) | Hydro | 950 MW | 1959 | | Summer Falls Power Plant | Columbia Basin Hydropower | Hydro | 92 MW | 1985 | | Main Canal Headworks | Columbia Basin Hydropower | Hydro | 27 MW | 1987 | ### Planned generation | Plant | Technology | MW | Status | Year | Owner | |---|---|---|---|---|---| | Royal Slope | Batteries | 260 MW | Approvals received | 2027 | Royal Slope Solar LLC | | Royal Slope | Solar Photovoltaic | 260 MW | Approvals received | 2027 | Royal Slope Solar LLC | | SR Quincy Valley | Solar Photovoltaic | 130 MW | Under construction (>50%) | 2026 | SR Quincy Valley, LLC | ### Retired since 2019 | Plant | Technology | MW | Year | |---|---|---|---| | Wanapum | Hydro | 104 MW | 2019 | | Quincy Chute | Hydro | 9 MW | 2025 | | PEC Headworks | Hydro | 7 MW | 2025 | ## The Grant County labor market | Industry (2025) | Jobs | Average pay | Concentration vs U.S. | |---|---|---|---| | All industries | 42,301 | $66,316 | 1.00 | | Construction | 1,668 | $83,836 | 0.74 | | Electrical contractors | 268 | $102,178 | 0.88 | | Data processing and hosting | 235 | $213,930 | 1.79 | Concentration is the BLS location quotient: 1.0 means the industry holds the same share of local jobs as it does nationally. Industry rows count private employers; cells BLS suppresses are left out. ## Data centers and local rules in Grant County 27 data centers in Grant County are on the SAVRN Data Center Map. ### Delay Watchlist | Project | Status | Cause | MW | |---|---|---|---| | Grant County PUD Data Center Load Growth Cap | delayed | community opposition | — | ## Grant County and its neighbors Of the 8 counties that border Grant County, Benton County carries the most build-out activity: data centers, planned generation and operating plants combined. [[[[[[[[ | County | Population | Jobs since 2019 | Operating MW | Planned MW | Data centers | Local measures | |---|---|---|---|---|---|---| | Grant County | 105,727 | ▲ 5.8% | 9,098 MW | 650 MW | 27 | — | | Adams County](https://savrn.com/power-supply-chain-map/washington/adams-county) | 21,488 | ▲ 10.3% | 169 MW | 126 MW | — | — | | Benton County](https://savrn.com/power-supply-chain-map/washington/benton-county) | 221,722 | ▲ 8.9% | 1,322 MW | 1,200 MW | 1 | — | | Douglas County](https://savrn.com/power-supply-chain-map/washington/douglas-county) | 46,473 | ▼ 1.1% | 2,456 MW | — | 8 | — | | Franklin County](https://savrn.com/power-supply-chain-map/washington/franklin-county) | 102,612 | ▲ 8.6% | 4 MW | — | — | — | | Kittitas County](https://savrn.com/power-supply-chain-map/washington/kittitas-county) | 48,803 | ▲ 9.1% | 483 MW | — | — | 1 | | Lincoln County](https://savrn.com/power-supply-chain-map/washington/lincoln-county) | 11,982 | ▼ 0.6% | 113 MW | — | — | 1 | | Okanogan County](https://savrn.com/power-supply-chain-map/washington/okanogan-county) | 45,230 | ▲ 4.2% | — | — | — | — | | Yakima County](https://savrn.com/power-supply-chain-map/washington/yakima-county) | 259,185 | ▼ 0.4% | 194 MW | 80 MW | 1 | 1 | ## More of Washington [All Washington countiesThe state power page and county mapOpen →](https://savrn.com/power-supply-chain-map/washington)[Yakima County259,185 peopleOpen →](https://savrn.com/power-supply-chain-map/washington/yakima-county)[Benton County221,722 peopleOpen →](https://savrn.com/power-supply-chain-map/washington/benton-county)[Franklin County102,612 peopleOpen →](https://savrn.com/power-supply-chain-map/washington/franklin-county)[Kittitas County48,803 peopleOpen →](https://savrn.com/power-supply-chain-map/washington/kittitas-county)[Douglas County46,473 peopleOpen →](https://savrn.com/power-supply-chain-map/washington/douglas-county) ## Grant County, answered from the record ### Who provides electricity in Grant County, Washington? 5 utilities have service territory in Grant County in the EIA-861 2024 report: Avista Corp, PUD No 2 of Grant County, Big Bend Electric Coop, Inc, Bonneville Power Administration. The largest, Avista Corp, charged residential customers 11.87¢/kWh on average in 2024. ### What county is Moses Lake, WA in? Moses Lake is in Grant County, Washington. About 27,469 people live there (2025 Census estimate). ### What power plants are in Grant County? 5 operating plants with 9,098 MW of capacity. The largest is Grand Coulee (6,809 MW, hydro). ### How much new power is planned in Grant County? 650 MW across 3 units in the August 2026 EIA-860M inventory, 130 MW of it under construction or built. The largest owner is Royal Slope Solar LLC. ### Are there data centers in Grant County? Yes. The SAVRN Data Center Map lists 27 data centers in Grant County. ### Is Grant County adding jobs? Employers counted 42,301 jobs in 2025 against 39,967 in 2019 (+5.8%, BLS QCEW). Construction went from 1,424 to 1,668. ### Does Grant County have a data center moratorium? No county-level measure is on record for Grant County. Washington has 21 local measures statewide, listed on the state page. --- Canonical: https://savrn.com/power-supply-chain-map/washington/grant-county Updated: 2026-10-08. Refreshed weekly by SAVRN from EIA, BLS, BEA, Census and the SAVRN trackers. License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).