Dams in Grant County, Oregon
16Total Dams
1High Hazard
0Significant
Dam Safety in Grant County, Oregon
Grant County has 16 dams tracked in the National Inventory of Dams. Of these, 1 are classified as high hazard — meaning failure would probably cause loss of human life.
The average dam in Grant County is 59 years old. The most common purpose is irrigation. The tallest dam is Waller No. 3 at 71 ft.
Explore more: Oldest dams in Oregon · Tallest dams · High risk dams · Largest reservoirs
Data note: Hazard potential describes the consequences if a dam failed; it does not predict the likelihood of failure. Inspection, condition, and emergency-plan fields can be incomplete or delayed. Check state dam-safety officials and local emergency managers for official guidance.
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Olive Lake | High | Not Rated | 39 | Recreation | 1907 |
| Waller No. 3 | Low | Not Rated | 71 | Irrigation | 1965 |
| Bull Prairie Reservoir | Low | Not Rated | 51 | Recreation | 1961 |
| Oxbow Ranch Dam (grant) | Low | Not Rated | 42 | Irrigation | 1980 |
| Officer Reservoir | Low | Not Rated | 35 | Irrigation | 1970 |
| Thomas-cavender | Low | Not Rated | 32 | Irrigation | 1985 |
| Emmel Bros. Reservoir | Low | Not Rated | 27 | Irrigation | 1984 |
| Bates Reservoir | Low | Not Rated | 26 | Recreation | 1949 |
| Yokom Reservoir | Low | Not Rated | 25 | Irrigation | 1947 |
| Rickman Reservoir | Low | Not Rated | 25 | Irrigation | |
| Sproul Reservoir | Low | Not Rated | 24 | Irrigation | 1962 |
| Buffalo Lake Dam | Low | Not Rated | 22 | Irrigation | 1963 |
| Poison Creek Dam | Low | Satisfactory | 21 | Fish and Wildlife Pond | 1999 |
| Pons Lake Reservoir | Low | Not Rated | 20 | Irrigation | 1968 |
| Prairie City Lagoon (cell 3) | Low | Not Rated | 18 | Irrigation | 1981 |
| Prairie City Lagoon (cell 2) | Low | Not Rated | 16 | Irrigation | 1981 |