Solar on the Hanford reservation, where cleanup meets clean energy

What Cleanup to Clean Energy actually is

If you pay a power bill in the Tri-Cities, in Richland, Pasco, or Kennewick, most of your electricity moves over Bonneville Power Administration lines, and you live beside the largest piece of federal land in the state that most people never set foot on. The Hanford Site runs along the Columbia River in the state's dry southeast corner, roughly 580 square miles of shrub-steppe fenced off since the 1940s. For most of that time Hanford has meant one word: cleanup.

The Department of Energy now wants some of that disturbed ground to do a second job. Under an initiative it calls Cleanup to Clean Energy, announced in early 2024, DOE would offer portions of several of its sites, Hanford among them, to private developers under long-term leases for solar panels and battery storage. This desk read through DOE's public solicitation materials and site documents to see what the plan commits the government to, and what it does not.

The honest math on acreage

At Hanford, DOE has pointed to land on the order of 10,000 acres as potentially available, ground already scraped and disturbed by the weapons program and unsuited to farming, housing, or most other uses. The deal runs through a request for qualifications (a first-round screen where DOE asks developers to prove they can do the work before any lease is offered), then a competitive lease. DOE stays the landlord. A private company would design, finance, build, and operate the actual project.

Run the rough arithmetic and the numbers get big fast, then smaller once you are honest. Utility-scale solar needs somewhere around 5 to 10 acres per megawatt, so 10,000 acres suggests on the order of 1,000 to 2,000 megawatts of nameplate capacity if every acre were buildable. It will not be. Setbacks, shrub-steppe habitat, cultural and tribal resources, and the zones DOE keeps for active cleanup all take bites, so a realistic first wave is more likely a few hundred megawatts than a gigawatt. Treat any single figure you see as a placeholder until a specific lease is signed.

Where it would plug in

The reason Hanford is attractive is not just empty land, it is wire. Bonneville's high-voltage transmission already crosses the region, and the Columbia Generating Station, the Northwest's only commercial nuclear plant, operated by Energy Northwest on leased Hanford land, ties into that grid nearby. A solar project sited near existing lines and substations avoids the cost and years of building new transmission across the desert.

That said, plugging in is the slow part, not the easy part. New generation has to clear BPA's interconnection study process, which examines whether the grid can absorb the power without upgrades, and that queue has run long across the West at last public report. A lease does not guarantee a grid connection, and the connection, not the panels, is usually what sets the real schedule.

What a lease actually commits

A lease is a real estate transaction, not a power contract. DOE would hand over the use of acreage for a term measured in decades and collect rent. It does not promise to buy the electricity, and it does not build anything. The developer sells the output into the market or to a utility under a separate deal that ratepayers never see directly.

The cleanup obligation does not transfer with the land. DOE's responsibility for the tanks, the old reactors, and the contaminated groundwater stays with DOE, and the leases are written to carve around active cleanup areas, with the developer expected to remove its equipment at the end of the term. How cleanly those boundaries hold on the ground is the thing worth checking against the actual solicitation and lease language as it is published.

Worth watching this month

1. Watch energy.gov for any updated Cleanup to Clean Energy solicitation steps or lease award notices naming Hanford, which would be the first hard signal that a specific project is moving rather than being studied.

2. Watch Bonneville's interconnection queue postings for new Hanford-area requests, a routine but telling indicator of how large and how serious an early project is.

3. Watch Washington's Energy Facility Site Evaluation Council (EFSEC) for any site certification filing, which a large solar project in the state can trigger and which opens public comment.

4. Watch for Energy Northwest or other developer announcements tied to Hanford-area solar, keeping in mind that a press release is not a signed lease.

5. Watch Washington Department of Commerce reporting under the Clean Energy Transformation Act, routine paperwork, but it is where the state's 2045 clean-power target turns into utility obligations that projects like this are meant to serve.