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 395
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Curlew Valley Oneida County | 41 | 1911 | Significant | Poor |
| Current Creek Bannock County | 49 | 1977 | Significant | Satisfactory |
| Daniels Oneida County | 96 | 1967 | High | Fair |
| Davis Valley County | 34 | 1942 | Significant | Fair |
| Deadwood Dam Valley County | 165 | 1931 | High | Not Available |
| Deep Creek Oneida County | 91 | 1952 | High | Fair |
| Deep Creek No 1 Twin Falls County | 18 | 1911 | Low | Fair |
| Deep Creek No 2 Twin Falls County | 42 | 1911 | Significant | Fair |
| Deep Creek Upper Oneida County | 36 | 1906 | Significant | Fair |
| Deer Creek Clearwater County | 48 | 2003 | Significant | Fair |
| Deer Flat Lower Dam Canyon County | 49 | 1908 | High | Not Available |
| Deer Flat Middle Canyon County | 16 | 1911 | High | Fair |
| Deer Flat Upper Dam Canyon County | 74 | 1908 | High | Not Available |
| Delamar Wmp-1 Owyhee County | 42 | 2009 | Low | Satisfactory |
| Devil Creek Oneida County | 84 | 1969 | High | Fair |
| Dewey Cassia County | 30 | 1913 | Significant | Satisfactory |
| Deyo Clearwater County | 41 | 2011 | Significant | Satisfactory |
| Diamond A Owyhee County | 29 | 1931 | Low | Fair |
| Dog Creek Gooding County | 26 | 1958 | Significant | Fair |
| Dry Creek Dike Payette County | 34 | 1976 | Significant | Fair |
| Dry Creek Diversion Payette County | 35 | 1976 | Low | Fair |
| Dry Creek Main Payette County | 68 | 1976 | High | Fair |
| Dworshak Dam Clearwater County | 717 | 1973 | High | Not Available |
| Egbert Dam Fremont County | 15 | 1982 | Low | Fair |
| Egin Canal Diversion Fremont County | 7 | 1903 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.