43Total Dams
7High Hazard
19Significant
Dam Safety in Clackamas County, Oregon
Clackamas County has 43 dams tracked in the National Inventory of Dams. Of these, 7 are classified as high hazard — meaning failure would probably cause loss of human life. Another 19 carry a significant hazard classification.
The average dam in Clackamas County is 65 years old. The most common purpose is irrigation. The tallest dam is North Fork at 207 ft.
Explore more: Oldest dams in Oregon · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| North Fork | High | Satisfactory | 207 | Hydroelectric | 1958 |
| Spillway Dam | High | Fair | 180 | Water Supply | 1962 |
| Timothy Lake | High | Satisfactory | 100 | Hydroelectric | 1956 |
| River Mill | High | Satisfactory | 85 | Hydroelectric | 1911 |
| Mompano | High | Satisfactory | 44 | Other | 1971 |
| Buche (clackamas) | High | Fair | 33 | Recreation | 1989 |
| Faraday Forebay | High | Satisfactory | 33 | Hydroelectric | 1907 |
| Faraday Diversion | Significant | Satisfactory | 84 | Hydroelectric | 1965 |
| Deardorff, Betty Jane | Significant | Not assessed | 68 | Other | 1971 |
| Frog Lake Dam a | Significant | Satisfactory | 50 | Hydroelectric | 1955 |
| Lake Roslyn | Significant | Not assessed | 49 | Hydroelectric | 1959 |
| Timber Lake | Significant | Not assessed | 46 | Recreation | |
| Rose Reservoir | Significant | Not assessed | 40 | Irrigation | 1974 |
| Beyer Reservoir | Significant | Not assessed | 38 | Irrigation | 1968 |
| Oswego Lake Dam | Significant | Not assessed | 34 | Hydroelectric | 1921 |
| Sandy Farms No. 1-a | Significant | Not assessed | 33 | Irrigation | 1977 |
| Rogers - Joseph Reservoir | Significant | Not assessed | 31 | Irrigation | 1971 |
| Veterans Reservoir | Significant | Not assessed | 30 | Irrigation | 1923 |
| Day Reservoir | Significant | Not assessed | 26 | Irrigation | 1971 |
| Zielinski Farm Reservoir | Significant | Not assessed | 26 | Irrigation | 1974 |
| Teasel Creek | Significant | Not assessed | 23 | Other | 1972 |
| Haberlach Dam | Significant | Not assessed | 22 | Irrigation | 1961 |
| Drescher Reservoir | Significant | Not assessed | 21 | Irrigation | 1958 |
| Willamette Falls | Significant | Satisfactory | 20 | Hydroelectric | 1923 |
| Three Creeks Natural Area | Significant | Not assessed | 14 | ||
| Cedar Grove Lake | Significant | Not assessed | 11 | Irrigation | |
| Harriet Lake | Low | Satisfactory | 68 | Hydroelectric | 1923 |
| Hershiser Reservoir | Low | Not assessed | 42 | Irrigation | 1972 |
| Meridian Reservoir | Low | Not assessed | 38 | Irrigation | 1994 |
| Isakson Reservoir | Low | Not assessed | 30 | Recreation | 1972 |
| Headworks Diversion Dam | Low | Satisfactory | 30 | Water Supply | 1923 |
| Mitchell - Stanley Reservoir | Low | Not assessed | 26 | Irrigation | 1960 |
| Anderson - Roy Reservoir | Low | Not assessed | 26 | Recreation | 1970 |
| Porter Cc Reservoir (clackamas) | Low | Not assessed | 26 | Recreation | 1977 |
| Briscoe Reservoir | Low | Not assessed | 25 | Irrigation | 1966 |
| Schaefer, Ray Reservoir | Low | Not assessed | 25 | Irrigation | 1965 |
| Trillium Lake | Low | Not assessed | 21 | Recreation | 1960 |
| Iseli Nursery 4 | Low | Not assessed | 20 | Irrigation | 1989 |
| Remembrance Lake | Low | Not assessed | 19 | Other | |
| Crown Zellerbach (lagoon) | Low | Not assessed | 15 | Other | |
| Iverson (clackamas) | Low | Not assessed | 15 | Irrigation | 1994 |
| Vandecoevering | Low | Not assessed | 15 | Irrigation | |
| Aamodt Flashboard Dam | Low | Not assessed | 10 | Irrigation | 1977 |