Pierson-Upper
Oregon — Washington County — TUALATIN RIVER, TRIB TO
Location
| State | Oregon |
| County | Washington |
| River | TUALATIN RIVER, TRIB TO |
| Coordinates | 45.45643, -123.06061 |
Physical Characteristics
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 120 ft |
| NID Storage | 18 acre-ft |
| Max Storage | 18 acre-ft |
| Surface Area | 2 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Not Rated |
| EAP Status | Not Required |
| Last Inspection | March 17, 2015 |
| Inspection Frequency | 6 |
Dam Information
| Year Completed | 1965 |
| Primary Purpose | Irrigation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | JEFFERY W. GEIGER |
| Other Name | None |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.