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 26–50 of 141
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Crane Gulch East Dam Ada County | 60 | 1998 | Significant | Satisfactory |
| Crane Gulch Main Fork Ada County | 46 | 1998 | Significant | Satisfactory |
| Curlew Valley Oneida County | 41 | 1911 | Significant | Poor |
| Current Creek Bannock County | 49 | 1977 | Significant | Satisfactory |
| Davis Valley County | 34 | 1942 | Significant | 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 |
| Dewey Cassia County | 30 | 1913 | Significant | Satisfactory |
| Deyo Clearwater County | 41 | 2011 | Significant | Satisfactory |
| Dog Creek Gooding County | 26 | 1958 | Significant | Fair |
| Dry Creek Dike Payette County | 34 | 1976 | Significant | Fair |
| Fairchild No 2 (Lower) Washington County | 24 | 1988 | Significant | Fair |
| Foreman Owyhee County | 21 | 1929 | Significant | Poor |
| Francis Elmore County | 33 | 1914 | Significant | Fair |
| Galena Mill No 3 Lower Shoshone County | 64 | 1979 | Significant | Fair |
| Galena No 2 Mtis Shoshone County | 48 | — | Significant | Fair |
| Gatfield No 1 Gem County | 16 | 1938 | Significant | Fair |
| Gatfield No 2 Gem County | 20 | 1951 | Significant | Fair |
| Gimlet Blaine County | 24 | 1987 | Significant | Fair |
| Granite Lake Valley County | 25 | 1949 | Significant | Fair |
| Grasmere East Dam Owyhee County | 11 | — | Significant | Poor |
| Grasmere North Dam Owyhee County | 22 | 1936 | Significant | Poor |
| Grouse Creek North Custer County | 110 | 1994 | Significant | Satisfactory |
| Hall Elmore County | 33 | 1945 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.