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 176–200 of 856
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Smith Linn County | 235 | 1963 | High | Unsatisfactory |
| Slide Creek Douglas County | 30 | 1951 | Low | Satisfactory |
| Skull Creek Reservoir Harney County | 100 | 1934 | Low | Not Rated |
| Skou Reservoir Jackson County | 22 | 1955 | Significant | Not Rated |
| Skookum Pond Dam Douglas County | 20 | 1972 | Low | Not Rated |
| Six Shooter Ranch Wheeler County | 22 | — | Low | Not Rated |
| Sitz Reservoir Harney County | 22 | 1924 | Low | Not Rated |
| Simpson Reservoir (Jackson) Jackson County | 27 | 1967 | Low | Not Rated |
| Simplot Waste Lagoon #1 Umatilla County | 46 | — | Significant | Not Rated |
| Simplot Hermiston #2 (Lagoon) Umatilla County | 32 | 2002 | Low | Not Rated |
| Simms Reservoir Klamath County | 15 | 1915 | Low | Not Rated |
| Silver Falls Log Pond (Marion) Marion County | 14 | 1956 | Low | Not Rated |
| Silver Creek Marion County | 65 | 1975 | High | Fair |
| Siltcoos Lake Lane County | 14 | 1964 | Low | Not Rated |
| Shumway Reservoir Malheur County | 10 | 1921 | Low | Not Rated |
| Shipler Reservoir Curry County | 23 | 1984 | Low | Not Rated |
| Sherwood Creek Reservoir Crook County | 27 | 1965 | Low | Not Rated |
| Sherman Stock Reservoir #1 Columbia County | 28 | 1952 | Low | Not Rated |
| Sherlock Gulch Lake County | 19 | 1974 | Low | Not Rated |
| Sheep Lake Harney County | 10 | — | Low | Not Rated |
| Shaw Dam and Dikes (Union) Union County | 51 | 1955 | Low | Not Rated |
| Shaniko Ranch Wasco County | 44 | — | Low | Not Rated |
| Shaffer Reservoir Polk County | 16 | 1987 | Significant | Not Rated |
| Shady Creek Crook County | 32 | — | Low | Not Rated |
| S. Fork Squaw Creek Dam Malheur County | 33 | 1970 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.