Patterson Creek No.20
West Virginia — Mineral County — LILLER RUN
Location
| State | West Virginia |
| County | Mineral |
| River | LILLER RUN |
| Coordinates | 39.34889, -78.97500 |
Physical Characteristics
| NID Height | 61 ft |
| Dam Height | 61 ft |
| Dam Length | 400 ft |
| NID Storage | 528 acre-ft |
| Max Storage | 528 acre-ft |
| Surface Area | 5 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | September 30, 2025 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1967 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | Potomac Valley CD |
| Other Name | Liller Run |
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.