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 151–175 of 191

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
South 336th Street Stormwater Dam No 1 King County	12	1996	High	Fair
South 336th Street Stormwater Dam No 2 King County	19	1996	High	Fair
South Fork Mccorkle Creek Detention Dam Cowlitz County	22	1989	High	Fair
South Ridge Stormwater Detention Dam King County	10	2002	High	Fair
Southwest Genesee Street Detention Dam King County	27	1974	High	Fair
Sprague Wastewater Treatment Lagoons Lincoln County	14	1993	High	Fair
Springwood Stormwater Detention Dam King County	10	1992	High	Fair
Steffen Brothers Reservoir Dam Chelan County	15	1947	High	Fair
Stemilt Main Dam Chelan County	65	1962	High	Fair
Stemilt Saddle Dam Chelan County	9	1962	High	Fair
Sullivan Lake Pend Oreille County	34	1923	High	Fair
Sunny Dene Dairy Waste Pond Yakima County	21	2004	Significant	Fair
Sunnyside Mp 37.1 Reservoir Yakima County	34	2011	High	Fair
Sunnyside Mp 59.29 Reservoir Benton County	44	2005	High	Fair
Swift No. 1 Skamania County	412	1958	High	Fair
Sylvia Lake Dam Pierce Co Pierce County	16	1963	Significant	Fair
Telegraph Road Stormwater Detention Dam Whatcom County	14	1988	High	Fair
Tesoro Water Storage Reservoir Skagit County	11	1958	High	Fair
Tolt River - South Fork King County	200	1962	High	Fair
Tree Top Prosser Lagoons 2 & 3 Benton County	18	1991	Significant	Fair
Trophy Ponds Dam Snohomish County	16	1984	High	Fair
Trout Lake Storage Dam San Juan County	37	1929	High	Fair
Tuck Lake Dam King County	47	1966	High	Fair
Upper Blackhorse Dam Spokane County	10	1960	Low	Fair
Upper Turnbull Dam Spokane County	12	1960	Low	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.