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 126–150 of 166
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sand Dunes Wastewater Lagoon Dam Morrow County | 35 | — | Significant | Not Rated |
| Sandy Farms No. 1-A Clackamas County | 33 | 1977 | Significant | Not Rated |
| Sarvis Crook County | 38 | 1970 | Significant | Not Rated |
| Schwartz Reservoir Lane County | 20 | 1958 | Significant | Not Rated |
| Sester, William H. Reservoir 1 Multnomah County | 38 | 1969 | Significant | Not Rated |
| Shaffer Reservoir Polk County | 16 | 1987 | Significant | Not Rated |
| Simplot Waste Lagoon #1 Umatilla County | 46 | — | Significant | Not Rated |
| Skou Reservoir Jackson County | 22 | 1955 | Significant | Not Rated |
| South Fork Reservoir Harney County | 30 | 1968 | Significant | Not Rated |
| Sowell Dam Josephine County | 26 | 1960 | Significant | Not Rated |
| Sparks Deschutes County | 19 | 2002 | Significant | Not Rated |
| Spring Lake Estates Marion County | 36 | 1972 | Significant | Not Rated |
| Squaw Lake Dam Jackson County | 34 | 1957 | Significant | Not Rated |
| Star Mountain Reservoir Malheur County | 68 | 1961 | Significant | Not Rated |
| Stinking Water Creek Harney County | 75 | 1967 | Significant | Not Rated |
| Sullivan Pond 3 Linn County | 30 | 2009 | Significant | Not Rated |
| Sun Studs Log Pond Douglas County | 17 | 1950 | Significant | Not Rated |
| Sutherlin Log Pond Douglas County | 14 | 1958 | Significant | Not Rated |
| Suttle Jefferson County | 6 | 1961 | Significant | Not Rated |
| Teasel Creek Clackamas County | 23 | 1972 | Significant | Not Rated |
| Thompson (Benton) Benton County | 44 | 1956 | Significant | Not Rated |
| Thompson Valley Diversion (Slid) Lake County | 48 | 1915 | Significant | Not Rated |
| Thompson Valley Reservoir Lake County | 48 | 1922 | Significant | Not Rated |
| Three Creek Deschutes County | 21 | — | Significant | Not Rated |
| Three Creeks Natural Area Clackamas County | 14 | — | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.