Risky reservoirs: Washington counties where aging dams pose the greatest threat

Klickitat County ranked #1 for having the most hazardous dams.

GetMyBoat analyzed data from the National Inventory of Dams to identify counties in Washington with the most dams at risk of failure that could threaten residents.

#1. Klickitat County

– Total high-hazard dams: 2
– Number potentially dangerous: 2 (100.0%)
– Potentially dangerous dams include:
— 2 condition withheld

#2. Columbia County

– Total high-hazard dams: 1
– Number potentially dangerous: 1 (100.0%)
– Potentially dangerous dams include:
— 1 condition withheld

#3. Whitman County

– Total high-hazard dams: 1
– Number potentially dangerous: 1 (100.0%)
– Potentially dangerous dams include:
— 1 condition withheld

#4. Grant County

– Total high-hazard dams: 6
– Number potentially dangerous: 5 (83.3%)
– Potentially dangerous dams include:
— 1 in poor condition
— 4 condition withheld

#5. Kittitas County

– Total high-hazard dams: 7
– Number potentially dangerous: 5 (71.4%)
– Potentially dangerous dams include:
— 5 condition withheld

** See the full list of 30 counties with hazardous damns by clicking here.