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 401–425 of 856
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Marx Brothers Reservoir Polk County | 32 | 1977 | Low | Not Rated |
| Martin Bros. Flashboard Dam Polk County | 11 | 1973 | Low | Not Rated |
| Marks Lake Dam Crook County | 20 | 1968 | Low | Not Rated |
| Maple Headquarters Reservoir Washington County | 19 | 1986 | Significant | Not Rated |
| Maple Grove Polk County | 38 | 1995 | Low | Not Rated |
| Malone Diversion Dam Klamath County | 32 | 1923 | Low | Not Available |
| Mallories Lagoon #1 Marion County | 13 | — | Low | Not Rated |
| Mallories Dairy Lagoon #2 Marion County | 22 | — | Low | Not Rated |
| Mainline 3 Crook County | 42 | 1971 | Significant | Not Rated |
| Mainline 1 Crook County | 57 | 1969 | Significant | Not Rated |
| Mahon Reservoir Harney County | 31 | 1904 | Low | Not Rated |
| Maher Dam Malheur County | 14 | 1934 | Low | Not Rated |
| Madras Wwt Lagoon Jefferson County | 25 | — | Low | Not Rated |
| Macedo Dairy Lagoon Linn County | 17 | 1998 | Low | Not Rated |
| Lyle Reservoir Jefferson County | 15 | 1911 | Low | Not Rated |
| Lucky Lake County | 18 | 1966 | Low | Not Rated |
| Lower Twelvemile (Buker Res) Crook County | 25 | 1949 | Low | Not Rated |
| Lower Clark Reservoir Malheur County | 11 | 2004 | Low | Not Rated |
| Love Reservoir (Malheur) Malheur County | 44 | 1907 | Significant | Not Rated |
| Love Reservoir (Baker) Baker County | 32 | 1952 | Significant | Not Rated |
| Lost River Diversion Dam Klamath County | 42 | 1912 | Low | Not Available |
| Lostine Reservoir Wallowa County | 14 | 1970 | Low | Not Rated |
| Lorence Lake Marion County | 28 | 1959 | Significant | Not Rated |
| Lookout Point Dam Lane County | 276 | 1953 | High | Not Available |
| Looking Glass Reservoir Union County | 21 | 1919 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.