Patterson Creek No.21
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | West Virginia |
| County | Mineral |
| Nearest City | BURLINGTON |
| River/Stream | MILL CREEK |
| Coordinates | 39.33417, -78.99111 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 78 ft |
| Dam Height | 78 ft |
| Dam Length | 665 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 2,567 acre-ft |
| Max Storage | 2,567 acre-ft |
| Normal Storage | 69 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 43,625 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Potomac Valley CD |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/30/2025 |
| Emergency Action Plan | Yes |