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 101–125 of 248
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Indian Creek Pond Payette County | 28 | 1990 | Significant | Fair |
| Indian Creek Upper Caribou County | 15 | 1975 | Low | Fair |
| Jacobs Fremont County | 19 | 1935 | Low | Fair |
| J-Ditch Effluent Lagoon Valley County | 60 | 2001 | High | Fair |
| Jemima K Valley County | 71 | 1974 | Significant | Fair |
| Jenkins Creek Washington County | 41 | 1915 | Low | Fair |
| Johnson Franklin County | 28 | 1860 | Significant | Fair |
| Josephine Creek Owyhee County | 24 | 1983 | Low | Fair |
| Jug Creek Upper Valley County | 32 | 1946 | Significant | Fair |
| Jughandle Estates Valley County | 28 | 1974 | Significant | Fair |
| Jussila Bow Valley County | 23 | 1949 | Significant | Fair |
| Kiblen North Kootenai County | 26 | 1969 | Low | Fair |
| 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 |
| Koskella Valley County | 24 | 1947 | Low | Fair |
| Lake Cleveland Cassia County | 7 | 1914 | Low | Fair |
| Lamb-Weston Power County | 20 | 1974 | Low | Fair |
| Lamont Franklin County | 68 | 1948 | High | Fair |
| Land Washington County | 15 | 1976 | Low | Fair |
| 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 |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.