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 326–350 of 535
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Noble Reservoir 1 Klamath County | 12 | 1961 | Low | Not Rated |
| Oakridge Mill Log Pond Lane County | 14 | 1947 | Low | Not Rated |
| Obenchain Reservoir Klamath County | 30 | 1958 | Low | Not Rated |
| Oberg Reservoir Yamhill County | 38 | 1970 | Low | Not Rated |
| Oconnor Puddle Klamath County | 13 | 1969 | Low | Not Rated |
| Odell, Ben Malheur County | 16 | 1954 | Low | Not Rated |
| O.E.Loe Dam 2 Porter Place Marion County | 25 | — | Low | Not Available |
| Officer Reservoir Grant County | 35 | 1970 | Low | Not Rated |
| Olson, Phillip 2-B Yamhill County | 18 | 1977 | Low | Not Rated |
| Opal Springs Jefferson County | 21 | 1985 | Low | Satisfactory |
| Oregon End Dam Harney County | 16 | 1955 | Low | Not Rated |
| Oregon Pride Nursery Dam Yamhill County | 39 | — | Low | Not Rated |
| Oriana Reservoir Harney County | 16 | 1931 | Low | Not Rated |
| Osburn Reservoir Multnomah County | 35 | 1967 | Low | Not Rated |
| Oscar Dam Harney County | 12 | 1975 | Low | Satisfactory |
| Owen Jackson County | 31 | 1975 | Low | Not Rated |
| Oxbow Dam (Klamath) Klamath County | 24 | 1919 | Low | Not Rated |
| Oxbow Ranch Dam (Grant) Grant County | 42 | 1980 | Low | Not Rated |
| Pacific Plywood Log Pond Yamhill County | 15 | 1944 | Low | Not Rated |
| Painted Hills Reservoir Wheeler County | 45 | 1979 | Low | Not Rated |
| Paiute Reservoir Harney County | 21 | 1964 | Low | Not Rated |
| Palmer Reservoir Crook County | 37 | 1959 | Low | Not Rated |
| Parsnip Creek Reservoir Malheur County | 28 | 1960 | Low | Not Rated |
| Parvipes Marsh Dam Polk County | 10 | 1995 | Low | Poor |
| Patsys Pond Yamhill County | 26 | — | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.