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 156
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lehman Creek Upper Custer County | 22 | 1925 | Low | Poor |
| Little Crane Creek Washington County | 33 | 1908 | Low | Satisfactory |
| Little Valley Bonneville County | 23 | 1897 | Low | Fair |
| Lone Tree Owyhee County | 12 | 1918 | Low | Fair |
| Louie Lake Valley County | 18 | 1928 | Low | Fair |
| Louisa Creek Owyhee County | 41 | 1931 | Low | Poor |
| Lower Diversion Bonneville County | 14 | 1982 | Low | Satisfactory |
| Mchan Camas County | 21 | 1918 | Low | Fair |
| Mikesell Upper Fremont County | 16 | 1945 | Low | Fair |
| Mill Creek Lake Lemhi County | 19 | 1928 | Low | Fair |
| Monroe Washington County | 36 | 1916 | Low | Fair |
| Moose Creek Latah County | 20 | 1960 | Low | Fair |
| Morrison Franklin County | 17 | 1959 | Low | Fair |
| Munsee Twin Falls County | 23 | 1977 | Low | Fair |
| Nash Franklin County | 21 | 1952 | Low | Fair |
| Nelson Latah County | 17 | 1907 | Low | Satisfactory |
| Nixon No 2 Boundary County | 13 | — | Low | Poor |
| North Cove Creek Washington County | 26 | 1975 | Low | Fair |
| Nouque Owyhee County | 21 | 1967 | Low | Satisfactory |
| Olson Elmore County | 24 | 1981 | Low | Fair |
| Oxford Franklin County | 21 | 1920 | Low | Fair |
| Pacific Land Co Owyhee County | 27 | 1965 | Low | Fair |
| Paul Clark County | 28 | 1911 | Low | Poor |
| Payne Creek Owyhee County | 33 | 1930 | Low | Fair |
| Pershall Owyhee County | 27 | 1948 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.