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 651–675 of 856
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Schwartz Reservoir Lane County | 20 | 1958 | Significant | Not Rated |
| Scoggins Dam Washington County | 151 | 1975 | High | Not Available |
| Scott Dam Malheur County | 18 | 1911 | Low | Not Rated |
| Seaside City Clatsop County | 45 | 1996 | High | Satisfactory |
| Sester, William H. Reservoir 1 Multnomah County | 38 | 1969 | Significant | Not Rated |
| Sevan Lake Lake County | 45 | 1977 | Low | Not Rated |
| S. Fork Squaw Creek Dam Malheur County | 33 | 1970 | Low | Poor |
| Shady Creek Crook County | 32 | — | Low | Not Rated |
| Shaffer Reservoir Polk County | 16 | 1987 | Significant | Not Rated |
| Shaniko Ranch Wasco County | 44 | — | Low | Not Rated |
| Shaw Dam and Dikes (Union) Union County | 51 | 1955 | Low | Not Rated |
| Sheep Lake Harney County | 10 | — | Low | Not Rated |
| Sherlock Gulch Lake County | 19 | 1974 | Low | Not Rated |
| Sherman Stock Reservoir #1 Columbia County | 28 | 1952 | Low | Not Rated |
| Sherwood Creek Reservoir Crook County | 27 | 1965 | Low | Not Rated |
| Shipler Reservoir Curry County | 23 | 1984 | Low | Not Rated |
| Shumway Reservoir Malheur County | 10 | 1921 | Low | Not Rated |
| Siltcoos Lake Lane County | 14 | 1964 | Low | Not Rated |
| Silver Creek Marion County | 65 | 1975 | High | Fair |
| Silver Falls Log Pond (Marion) Marion County | 14 | 1956 | Low | Not Rated |
| Simms Reservoir Klamath County | 15 | 1915 | Low | Not Rated |
| Simplot Hermiston #2 (Lagoon) Umatilla County | 32 | 2002 | Low | Not Rated |
| Simplot Waste Lagoon #1 Umatilla County | 46 | — | Significant | Not Rated |
| Simpson Reservoir (Jackson) Jackson County | 27 | 1967 | Low | Not Rated |
| Sitz Reservoir Harney County | 22 | 1924 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.