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 751–775 of 856
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Timber Lake Clackamas County | 46 | — | Significant | Not Rated |
| Timothy Lake Clackamas County | 100 | 1956 | High | Satisfactory |
| Toketee Douglas County | 58 | 1949 | High | Unsatisfactory |
| Trail Bridge Saddle Dike Linn County | 35 | 1963 | High | Satisfactory |
| Traverse Lake Reservoir Union County | 10 | 1922 | Low | Not Rated |
| Tribbett Reservoir Marion County | 27 | 1969 | Low | Not Rated |
| Trillium Lake Clackamas County | 21 | 1960 | Low | Not Rated |
| Tualatin Park Washington County | 23 | 1970 | Significant | Not Rated |
| Tualatin Refuge Washington County | 14 | — | Low | Not Rated |
| Turnbull Peak Reservoir Malheur County | 13 | 1983 | Low | Not Rated |
| Turner Creek Reservoir Yamhill County | 26 | 1978 | Low | Not Rated |
| Turner Dam Polk County | 19 | — | Low | Not Rated |
| Twigg Reservoir Washington County | 16 | 1957 | Low | Not Rated |
| Twin Lake-Lower Baker County | 24 | 1908 | Low | Not Rated |
| Twin Lake-Upper Baker County | 15 | 1908 | Low | Not Rated |
| Twin Springs Dam Harney County | 27 | 1982 | Low | Poor |
| Twin Springs Dam Malheur County | 26 | 2004 | Low | Fair |
| Unger-Bill Dam Washington County | 40 | 1968 | Significant | Not Rated |
| Unity Dam Baker County | 82 | 1938 | High | Not Available |
| Updegrave Douglas County | 35 | 1957 | High | Satisfactory |
| Upper Clark Reservoir Malheur County | 12 | 2004 | Low | Not Rated |
| Upper Midway Klamath County | 13 | 1959 | Low | Not Rated |
| Upper Tumalo Reservoir Deschutes County | 13 | 1961 | Low | Not Rated |
| Van Conklin Dam #4 Wasco County | 18 | 1999 | Low | Not Rated |
| Van Conklin Dam #5 Wasco County | 26 | 1995 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.