Washington Dams

817 dams tracked by the National Inventory of Dams

Total Dams

817

High Hazard

404

49.4%

Poor / Unsatisfactory

65

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

69

State

42

Local

193

Private

392

Tallest Dams

High Hazard Dams

All Dams in Washington

Showing 2650 of 241

Dam NameHeight (ft)YearHazardCondition
Trossachs Detention Pond Pc-3

King County

151999HighSatisfactory
Trossachs Detention Pond Pc-2

King County

212002HighSatisfactory
Tri Mountain Estates Dam

Clark County

321953HighSatisfactory
Timberlakes Dam

Mason County

291968HighSatisfactory
Tapps Lake Dike No 9

Pierce County

151911HighSatisfactory
Tapps Lake Dike No 8

Pierce County

201911HighSatisfactory
Tapps Lake Dike No 6

Pierce County

281911HighSatisfactory
Tapps Lake Dike No 5

Pierce County

281911HighSatisfactory
Tapps Lake Dike No 4

Pierce County

481911HighSatisfactory
Tapps Lake Dike No 3

Pierce County

151911HighSatisfactory
Tapps Lake Dike No 2b

Pierce County

151911HighSatisfactory
Tapps Lake Dike No 2a

Pierce County

91911HighSatisfactory
Tapps Lake Dike No 15

Pierce County

271911LowSatisfactory
Tapps Lake Dike No 14

Pierce County

2561911LowSatisfactory
Tapps Lake Dike No 13

Pierce County

51911HighSatisfactory
Tapps Lake Dike No 12

Pierce County

141911HighSatisfactory
Tapps Lake Dike No 11

Pierce County

251911HighSatisfactory
Tapps Lake Dike No10

Pierce County

181911HighSatisfactory
Tapps Lake Dike No 1

Pierce County

181911HighSatisfactory
Tapps Lake Backflow Prevention Structure

Pierce County

222007HighSatisfactory
Talus P5 Stormwater Detention Dam

King County

242002HighSatisfactory
Tahuyeh Lake Dam

Kitsap County

221961HighSatisfactory
Swofford Pond

Lewis County

26LowSatisfactory
Swift No 2 Hydroelectric Project

Cowlitz County

1211959LowSatisfactory
Svid Mabton Canal 12.48 Reservoir

Yakima County

92010HighSatisfactory
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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.