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 |
|---|---|---|---|---|
| Langdon Lake Dam Umatilla County | 14 | 1930 | Low | Not Rated |
| Lapham Reservoir Lake County | 16 | 1920 | Low | Not Rated |
| Layton #2 Reservoir Crook County | 23 | 1978 | Low | Not Rated |
| Layton Reservoir 1 Crook County | 25 | 1977 | Low | Not Rated |
| Leaburg Canal and Forebay Lane County | 15 | 1930 | High | Unsatisfactory |
| Lebanon Dam Linn County | 9 | 1925 | Low | Satisfactory |
| Lemolo No 1 Douglas County | 120 | 1955 | High | Fair |
| Lemolo No. 1 Forebay Douglas County | 25 | 2009 | Low | Satisfactory |
| Lemolo No 2 Forebay Douglas County | 30 | 1956 | Low | Satisfactory |
| Lester James #1 Jackson County | 22 | 1953 | Significant | Not Rated |
| Lester James Reservoir 2 Jackson County | 15 | 1958 | Significant | Not Rated |
| Lester James Reservoir 3 Jackson County | 15 | 1959 | Significant | Not Rated |
| Lewis, Alfred Dam Washington County | 20 | 1967 | Low | Not Rated |
| Lillard Dam Crook County | 27 | 1950 | Low | Not Rated |
| Lillie Walker Irrigation Pond Dam Polk County | 10 | 1969 | Low | Not Available |
| Lind Reservoir Washington County | 21 | 1970 | Significant | Not Rated |
| Link River Diversion Dam Klamath County | 22 | 1921 | High | Not Available |
| Lippert Reservoir 2 (Upper) Josephine County | 32 | 1965 | Low | Not Rated |
| Little Hyatt Dam Jackson County | 23 | — | Low | Poor |
| Little Park Dam Union County | 32 | 1958 | Significant | Not Rated |
| Little River Log Pond Douglas County | 18 | 1950 | Low | Not Rated |
| Little Three Creek Deschutes County | 8 | — | Low | Not Rated |
| Little Willow Creek Reservoir Jefferson County | 43 | 1954 | Low | Not Rated |
| Lloyd Gift Reservoir Klamath County | 15 | 1940 | Low | Not Rated |
| Lockett Reservoir Malheur County | 25 | 1917 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.