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 176–200 of 248
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Granite Lake Valley County | 25 | 1949 | Significant | Fair |
| Grace Main Caribou County | 52 | 1908 | High | Fair |
| Goose Lake Adams County | 27 | 1919 | High | Fair |
| Glendale Franklin County | 73 | 1930 | High | Fair |
| Gimlet Blaine County | 24 | 1987 | Significant | Fair |
| Gatfield No 2 Gem County | 20 | 1951 | Significant | Fair |
| Gatfield No 1 Gem County | 16 | 1938 | Significant | Fair |
| Galena No 2 Mtis Shoshone County | 48 | — | Significant | Fair |
| Galena Mill No 3 Lower Shoshone County | 64 | 1979 | Significant | Fair |
| Francis Elmore County | 33 | 1914 | Significant | Fair |
| Foster Franklin County | 70 | 1962 | High | Fair |
| Foland Owyhee County | 11 | 1916 | Low | Fair |
| Fairchild No 2 (Lower) Washington County | 24 | 1988 | Significant | Fair |
| Fairchild No. 1 (Upper) Washington County | 78 | 1975 | High | Fair |
| Equalizer Bingham County | 23 | 1937 | High | Fair |
| Elkington Bonneville County | 35 | 1994 | Low | Fair |
| Eld Valley County | 19 | 1976 | Low | Fair |
| Egbert Dam Fremont County | 15 | 1982 | Low | Fair |
| Dry Creek Main Payette County | 68 | 1976 | High | Fair |
| Dry Creek Diversion Payette County | 35 | 1976 | Low | Fair |
| Dry Creek Dike Payette County | 34 | 1976 | Significant | Fair |
| Dog Creek Gooding County | 26 | 1958 | Significant | Fair |
| Diamond A Owyhee County | 29 | 1931 | Low | Fair |
| Devil Creek Oneida County | 84 | 1969 | High | Fair |
| Deer Flat Middle Canyon County | 16 | 1911 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.