October 05, 2026

Hanford’s old water treatment plant officially retired

By ExchangeMonitor

After being replaced by a new facility earlier this year, the old water treatment plant at the Department of Energy’s Hanford Site in Richland, Wash., is being taken down.

DOE announced Sept. 22 that the 283W water treatment plant has been removed from service and is being decommissioned after spending more than eight decades treating and delivering over 2 million gallons of water daily.

DOE’s landlord contractor, Leidos-led Hanford Mission Integration Solutions has taken out the old plant’s chlorine gas cylinders, DOE’s Office of Environmental Management said in a press release.  Removing the cylinders removes a safety risk to workers, according to the press release.

In January, the new Central Plateau Water Treatment Facility, which can handle 3.5 million gallons per day, came online to among other things provide water to the Waste Treatment Plant at Hanford. The new water plant was built by Fowler General Construction. The old plant was commissioned in the 1940s.

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