Idaho Dams

395 dams tracked by the National Inventory of Dams

Total Dams

395

High Hazard

97

24.6%

Poor / Unsatisfactory

42

Average Age

76 yrs

Hazard Classification

High97 (24.6%)
Significant141 (35.7%)
Low156 (39.5%)

Condition Assessment

Satisfactory76 (19.2%)
Fair248 (62.8%)
Poor / Unsatisfactory42 (10.6%)
Not Rated29 (7.3%)

Federal

33

State

14

Local

18

Private

325

Poor Condition Dams

All Dams in Idaho

Showing 151175 of 395

Dam NameHeight (ft)YearHazardCondition
Mountain View Dam

Owyhee County

251969SignificantPoor
Mountain Home

Elmore County

481884HighFair
Mosquito Flat

Custer County

581950SignificantFair
Morrison

Franklin County

171959LowFair
Mormon

Camas County

271908HighFair
Moose Creek

Latah County

201960LowFair
Montpelier Creek

Bear Lake County

821971HighFair
Monroe

Washington County

361916LowFair
Minidoka Dam

Minidoka County

881906HighNot Available
Milner Dam-Middle

Twin Falls County

801905HighSatisfactory
Mill Creek Lake

Lemhi County

191928LowFair
Mikesell Upper

Fremont County

161945LowFair
Mcmullen

Twin Falls County

251948SignificantFair
Mchan

Camas County

211918LowFair
Mcarthur

Boundary County

191967HighFair
Mann Creek Dam

Washington County

1481967HighNot Available
Magic Dam

Blaine County

1281910HighUnsatisfactory
Macks Creek

Owyhee County

581993SignificantFair
Mackay

Custer County

751918HighFair
Lucky Peak Dam

Ada County

3401955HighNot Available
Lucky Friday No 4

Shoshone County

1322010HighSatisfactory
Lucky Friday No 3

Shoshone County

1021979SignificantFair
Lower Salmon

Gooding County

1101949HighSatisfactory
Lower Diversion

Bonneville County

141982LowSatisfactory
Louisa Creek

Owyhee County

411931LowPoor
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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.