Dams in Multnomah County, Oregon
20Total Dams
7High Hazard
4Significant
Dam Safety in Multnomah County, Oregon
Multnomah County has 20 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 4 carry a significant hazard classification.
The average dam in Multnomah County is 81 years old. The most common purpose is irrigation. The tallest dam is Development No. 1 Dam at 200 ft.
Explore more: Oldest dams in Oregon · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Development No. 1 Dam | High | Fair | 200 | Water Supply | 1929 |
| Bonneville Locks And Dam | High | Not Available | 197 | Navigation | 1938 |
| Portland #5 (mt.tabor) | High | Satisfactory | 55 | Water Supply | 1911 |
| Portland #3 (washington Park) | High | Satisfactory | 53 | Water Supply | 1894 |
| Portland #1 (mt.tabor) | High | Satisfactory | 38 | Water Supply | 1894 |
| Portland #6 (mt.tabor) | High | Satisfactory | 28 | Water Supply | 1911 |
| Van Raden | High | Fair | 27 | Irrigation | 1975 |
| Mt. Hood Community College Dam | Significant | Not Rated | 58 | Irrigation | 1968 |
| Sester, William H. Reservoir 1 | Significant | Not Rated | 38 | Irrigation | 1969 |
| Binford Dam | Significant | Not Rated | 25 | Irrigation | 1958 |
| Peyralans Reservoir | Significant | Not Rated | 23 | ||
| Bull Run Lake Dam | Low | Not Rated | 57 | Water Supply | 1965 |
| Osburn Reservoir | Low | Not Rated | 35 | Recreation | 1967 |
| Belchers Dam | Low | Not Rated | 28 | Irrigation | 1965 |
| Diack Reservoir | Low | Not Rated | 26 | Irrigation | 1955 |
| Kelly Creek Regional Detention Pond | Low | Not Rated | 20 | Irrigation | |
| Wahkeena Rearing Reservoir | Low | Not Rated | 19 | Other | 1961 |
| Fairview Lake | Low | Not Rated | 18 | Recreation | 1919 |
| Smith-bybee Lakes | Low | Not Rated | 14 | Fish and Wildlife Pond | 1981 |
| Multnomanh Channel Dam #2 | Low | Not Rated | 12 |