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
Tallest Dams
- Thompson Mtis789 ft
- Dworshak Dam717 ft
- Anderson Ranch Dam456 ft
- Arrowrock Dam350 ft
- Lucky Peak Dam340 ft
High Hazard Dams
- Thompson MtisHigh
- Dworshak DamHigh
- Anderson Ranch DamHigh
- Arrowrock DamHigh
- Lucky Peak DamHigh
Poor Condition Dams
- Magic DamUnsatisfactory
- Fish CreekPoor
- OrchardPoor
- Saint JohnUnsatisfactory
- Louisa CreekPoor
All Dams in Idaho
Showing 76–100 of 141
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Kiblen West Kootenai County | 23 | 1969 | Significant | Fair |
| Kimberly Lake Lemhi County | 27 | 1970 | Significant | Fair |
| King Reservoir South Dam Owyhee County | 33 | 1969 | Significant | Fair |
| King Reservoir (West Dam) Owyhee County | 30 | 1969 | Significant | Fair |
| Knox Meadow Valley County | 19 | 1941 | Significant | Fair |
| Little Blue Creek Owyhee County | 37 | 1914 | Significant | Poor |
| Little Camas Elmore County | 55 | 1912 | Significant | Fair |
| Little Canyon Elmore County | 30 | 1919 | Significant | Fair |
| Little (North Crane Creek Dam) Washington County | 28 | 1895 | Significant | Fair |
| Little Payette Lake Dike Valley County | 11 | 1926 | Significant | Poor |
| Little (Upper Bissel Creek Dam) Gem County | 37 | 1963 | Significant | Fair |
| Lodge Pond Payette County | 15 | 1910 | Significant | Fair |
| Long Tom Elmore County | 60 | 1906 | Significant | Fair |
| Lucky Friday No 3 Shoshone County | 102 | 1979 | Significant | Fair |
| Macks Creek Owyhee County | 58 | 1993 | Significant | Fair |
| Mcmullen Twin Falls County | 25 | 1948 | Significant | Fair |
| Mosquito Flat Custer County | 58 | 1950 | Significant | Fair |
| Mountain View Dam Owyhee County | 25 | 1969 | Significant | Poor |
| Orchard Ada County | 43 | 1902 | Significant | Poor |
| Payette Lake Valley County | 13 | 1943 | Significant | Fair |
| Payette Lake Upper Valley County | 15 | 1953 | Significant | Fair |
| Pioneer Gooding County | 15 | 1910 | Significant | Fair |
| Pitkin Valley County | 21 | 1974 | Significant | Fair |
| Point of Rock Cassia County | 30 | 2004 | Significant | Satisfactory |
| Portneuf Wellness Complex | 39 | 2014 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.