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 326–350 of 395
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Crane Creek Dike Washington County | 25 | 1912 | High | Fair |
| Craig Washington County | 18 | 1978 | Low | Fair |
| Cow Creek Elmore County | 34 | 1915 | Low | Fair |
| Courtright Dike Washington County | 12 | 1973 | Low | Fair |
| Courtright Washington County | 24 | 1973 | Low | Fair |
| Cottonwood Creek Upper Ada County | 18 | 1961 | Significant | Fair |
| Cottonwood Creek Middle Ada County | 20 | 1961 | Significant | Fair |
| Cottonwood Creek Lower Ada County | 15 | 1961 | Significant | Fair |
| Corral Creek Valley County | 43 | 1952 | Significant | Fair |
| Condie Franklin County | 41 | 1948 | Significant | Satisfactory |
| Conda Site Mtis (Simplot) Caribou County | 45 | 1979 | Significant | Satisfactory |
| C J Strike Owyhee County | 115 | 1952 | High | Satisfactory |
| City Diversion Bonneville County | 30 | 1982 | Low | Satisfactory |
| Cinnabar Washington County | 26 | 1975 | Low | Fair |
| China Hat Dike Caribou County | 29 | 1923 | High | Satisfactory |
| Chilco Kootenai County | 17 | 1907 | Significant | Fair |
| Challis Lake Custer County | 19 | 1951 | Low | Poor |
| Cedar Creek Holding Twin Falls County | 24 | 1966 | Low | Fair |
| Cedar Creek Twin Falls County | 90 | 1920 | High | Fair |
| C Ben Ross Adams County | 61 | 1937 | High | Fair |
| Casperson Franklin County | 22 | 1958 | Low | Fair |
| Cascade Dam Valley County | 110 | 1948 | High | Not Available |
| Campbell Blaine County | 16 | 1913 | Low | Fair |
| Cabinet Gorge Bonner County | 177 | 1952 | High | Satisfactory |
| Bybee Owyhee County | 60 | 1987 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.