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 76–97 of 97
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Daniels Oneida County | 96 | 1967 | High | Fair |
| Crowther Oneida County | 90 | 1948 | High | Fair |
| Crane Creek Main Dam Washington County | 64 | 1912 | High | Fair |
| Crane Creek Dike Washington County | 25 | 1912 | High | Fair |
| C J Strike Owyhee County | 115 | 1952 | High | Satisfactory |
| China Hat Dike Caribou County | 29 | 1923 | High | Satisfactory |
| Cedar Creek Twin Falls County | 90 | 1920 | High | Fair |
| C Ben Ross Adams County | 61 | 1937 | High | Fair |
| Cascade Dam Valley County | 110 | 1948 | High | Not Available |
| Cabinet Gorge Bonner County | 177 | 1952 | High | Satisfactory |
| Brundage Adams County | 63 | 1936 | High | Fair |
| Boise River Diversion Dam Ada County | 68 | 1908 | High | Not Available |
| Bliss Gooding County | 140 | 1950 | High | Satisfactory |
| Blacks Creek Ada County | 52 | 1915 | High | Fair |
| Blackfoot Caribou County | 54 | 1911 | High | Fair |
| Black Canyon Diversion Dam Gem County | 183 | 1924 | High | Not Available |
| Ashton Fremont County | 65 | 1917 | High | Satisfactory |
| Arrowrock Dam Boise County | 350 | 1915 | High | Not Available |
| Anderson Ranch Dam Elmore County | 456 | 1950 | High | Not Available |
| American Falls Dam Power County | 104 | 1927 | High | Not Available |
| Albeni Falls Dam Bonner County | 180 | 1955 | High | Not Available |
| Aikman Gem County | 77 | 1999 | High | Fair |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.