William O Nannen Pond Dam
Significant HazardFair ConditionEmergency Action Plan: Yes
Location
| County | Cattaraugus |
| Nearest City | Ellicottville |
| River/Stream | TR-GREAT VALLEY CREEK |
| Coordinates | 42.28833, -78.66306 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 1,230 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 36 acre-ft |
| Max Storage | 36 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 48 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Michael L. Mead |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/17/2023 |
| Emergency Action Plan | Yes |