Wyoming Dams

1,490 dams tracked by the National Inventory of Dams

Total Dams

1,490

High Hazard

100

6.7%

Poor / Unsatisfactory

576

Average Age

62 yrs

Hazard Classification

High100 (6.7%)
Significant104 (7.0%)
Low1,283 (86.1%)

Condition Assessment

Satisfactory45 (3.0%)
Fair752 (50.5%)
Poor / Unsatisfactory576 (38.7%)
Not Rated117 (7.9%)

Federal

193

State

22

Local

82

Private

1,174

Tallest Dams

Poor Condition Dams

All Dams in Wyoming

Showing 501525 of 543

Dam NameHeight (ft)YearHazardCondition
Twin No. 1

Johnson County

471957LowPoor
Two Wash Detention

Washakie County

372003LowPoor
Upper

Washakie County

151922LowPoor
Upper Van Tassell

Laramie County

981932HighPoor
Valarie Irrigation

Campbell County

311962LowPoor
V. E. Lissolo Irrigation

Weston County

301955LowPoor
Verona

Sheridan County

551908LowPoor
Wagner

Natrona County

91909LowPoor
Wales

Hot Springs County

131912LowPoor
Wallace No. 2

Niobrara County

201958LowPoor
Walters

Big Horn County

261978LowPoor
Warner No. 1

Converse County

171951LowPoor
Warner No. 2

Converse County

231952LowPoor
Warriner No. 1

Sheridan County

191923LowPoor
Waterworks No. 3

Fremont County

401959LowPoor
Weaver

Albany County

291972LowPoor
Weir Pond

Sheridan County

81969LowPoor
Werner

Converse County

221950LowPoor
Wesley

Sheridan County

201915LowPoor
West

Crook County

151958LowPoor
West

Converse County

401950LowPoor
Weston

Sheridan County

181913SignificantPoor
West Side No. 1

Converse County

201967LowPoor
Wheatland No. 3

Albany County

281964LowPoor
White

Big Horn County

201914LowPoor
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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.