Washington Dams

817 dams tracked by the National Inventory of Dams

Total Dams

817

High Hazard

404

49.4%

Poor / Unsatisfactory

Average Age

55 yrs

Hazard Classification

High404 (49.4%)

Significant98 (12.0%)

Low312 (38.2%)

Condition Assessment

Satisfactory241 (29.5%)

Fair191 (23.4%)

Poor / Unsatisfactory65 (8.0%)

Not Rated320 (39.2%)

Federal

State

Local

193

Private

392

Tallest Dams

High Hazard Dams

Poor Condition Dams

All Dams in Washington

Showing 51–75 of 191

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
Ritzville Wastewater Lagoons Adams County	9	2000	Significant	Fair
Reflection Lake South Dam Spokane County	28	1955	High	Fair
Reflection Lake North Dam Spokane County	8	1955	High	Fair
Redmond Ridge East Pond Srn 2 No 1 King County	14	2008	High	Fair
Redmond Ridge Cedar Dam King County	26	2000	High	Fair
Rec Silicon Wastewater Pond Grant County	23	2009	Low	Fair
Reardan Sewage Lagoon Lincoln County	8	2006	High	Fair
Quincy Sludge Storage Lagoon System Lagoons 1 2 and 3 Grant County	15	1986	Significant	Fair
Quincy Brine Evaporation Ponds Grant County	11	1989	Significant	Fair
Priest Rapids Grant County	187	1961	High	Fair
Power Lake Dam Pend Oreille County	60	1922	High	Fair
Potters Pond Dam Stevens County	12	1959	Low	Fair
Pigeon Creek No 1 Stormwater Detention D Snohomish County	22	1990	Significant	Fair
Patterson Lake Dam Okanogan County	32	1924	High	Fair
Paterson Ranch Reservoir Benton County	23	2010	High	Fair
Pasco Process Water Reuse Storage Lagoon Franklin County	18	1997	High	Fair
Panther Lake Detention Dam King County	12	1994	High	Fair
Panther Lake Ballfield Dam King County	15	1994	High	Fair
Olympic Orchards Dam 4 Yakima County	12	1985	High	Fair
Olympic Orchards Dam 3 Yakima County	17	1985	High	Fair
Olympic Orchards Dam 2 Yakima County	21	1985	High	Fair
Ochoa Ob-3 Process Water Storage Lagoon Adams County	32	2009	High	Fair
North Fork Clover Creek W1 Det Facil Pierce County	10	2001	High	Fair
North Fork Clover Creek E1 Det Basin Pierce County	10	2000	High	Fair
Newcastle Vista Pond 3 King County	11	2012	High	Fair

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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.