Oregon Dams
856 dams tracked by the National Inventory of Dams
Total Dams
856
High Hazard
155
18.1%
Poor / Unsatisfactory
47
Average Age
67 yrs
Hazard Classification
High155 (18.1%)
Significant166 (19.4%)
Low535 (62.5%)
Condition Assessment
Satisfactory62 (7.2%)
Fair39 (4.6%)
Poor / Unsatisfactory47 (5.5%)
Not Rated708 (82.7%)
Federal
122
State
14
Local
94
Private
603
Tallest Dams
- Cougar Dam519 ft
- Detroit Dam463 ft
- Round Butte440 ft
- Owyhee Dam417 ft
- Brownlee395 ft
High Hazard Dams
- Cougar DamHigh
- Detroit DamHigh
- Round ButteHigh
- Owyhee DamHigh
- BrownleeHigh
Poor Condition Dams
- SmithUnsatisfactory
- Hosler (Reeder GulchUnsatisfactory
- Willow Creek 3 (Malheur)Unsatisfactory
- Clear BranchUnsatisfactory
- Bear CreekPoor
All Dams in Oregon
Showing 151–175 of 856
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Squaw Creek Id Reservoir Deschutes County | 20 | 1965 | Low | Not Rated |
| Sproul Reservoir Grant County | 24 | 1962 | Low | Not Rated |
| Spring Lake Estates Marion County | 36 | 1972 | Significant | Not Rated |
| Spring Lake Lincoln County | 26 | — | High | Satisfactory |
| Spaulding-Vaughn Reservoir Baker County | 12 | 1908 | Low | Not Rated |
| Sparks Deschutes County | 9 | — | Low | Not Rated |
| Sparks Deschutes County | 19 | 2002 | Significant | Not Rated |
| Spalding Dam Josephine County | 37 | 1990 | Low | Not Rated |
| Spada Reservoir #1 (Champoeg) Marion County | 24 | 1968 | Low | Not Rated |
| Spada Nursery Runoff #2 Marion County | 25 | — | Low | Not Rated |
| Spada Farms #2 (Ryan) Marion County | 26 | — | Low | Not Rated |
| Sowell Dam Josephine County | 26 | 1960 | Significant | Not Rated |
| South Fork Reservoir Harney County | 30 | 1968 | Significant | Not Rated |
| South Fork Diversion Dam Jackson County | 33 | 1932 | Low | Satisfactory |
| South Cottonwood Creek Reservoir Malheur County | 28 | 1961 | Low | Poor |
| South Arm Reservoir Lake County | 19 | 1908 | Low | Not Rated |
| Somerville, The Reservoir Malheur County | 30 | 1912 | Low | Not Rated |
| Soda Springs Douglas County | 127 | 1952 | High | Fair |
| Snyder Reservoir Wasco County | 25 | 1984 | Low | Not Rated |
| Smyth S Creek Dam Harney County | 24 | 1955 | Low | Not Rated |
| S-M-S No. 1 Marion County | 32 | 1966 | Low | Not Rated |
| Smith Reservoir Klamath County | 23 | 1970 | Low | Not Rated |
| Smith Lake Baker County | 28 | 1948 | Low | Not Rated |
| Smith, C.A. Reservoir Coos County | 10 | 1916 | Low | Not Rated |
| Smith-Bybee Lakes Multnomah County | 14 | 1981 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.