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 576600 of 1,283

Dam NameHeight (ft)YearHazardCondition
Irene No. 2

Carbon County

301953LowPoor
Iron Mountain

Albany County

351910LowFair
Iron Mountain No. 1

Albany County

321957LowFair
Isom

Uinta County

201976LowNot Rated
Jack Creek

Carbon County

241919LowPoor
Jack Dam

Natrona County

351971LowUnsatisfactory
Jack Pot

Natrona County

451915LowPoor
Jackson Wastewater Treatment Plant

Teton County

161980LowFair
James Lake

Albany County

401908LowPoor
James Thompson No. 1 Stock

Niobrara County

301960LowFair
Jenson

Fremont County

441979LowFair
Jepson No. 2

Johnson County

221953LowFair
Jerry Johns Reservoir No. 1

Sheridan County

251977LowPoor
Jessie

Crook County

261963LowFair
Jfw Corp 1-21 Water Storage Reservoir

Converse County

302015LowSatisfactory
J & H Ranch No. 1

Sheridan County

301959LowPoor
Jiggs

Campbell County

251957LowPoor
Jim

Campbell County

272006LowFair
J & J

Natrona County

251942LowPoor
J-J No. 3

Sublette County

91927LowFair
J. N. Mertz

Platte County

131903LowPoor
J. O.

Carbon County

301946LowPoor
Joe

Johnson County

271957LowFair
Joe Creek

Sheridan County

301963LowFair
Joe Draw Jr.

Sheridan County

302004LowPoor
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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.