Highland Lake Dam
New York — Orange County — SHAWANUNKILL
Location
| State | New York |
| County | Orange |
| River | SHAWANUNKILL |
| Coordinates | 41.45139, -74.48639 |
Physical Characteristics
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 516 ft |
| NID Storage | 2,147 acre-ft |
| Max Storage | 2,147 acre-ft |
| Surface Area | 98 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Fair |
| EAP Status | Yes |
| Last Inspection | April 3, 2025 |
| Inspection Frequency | 2 |
Dam Information
| Year Completed | 1920 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | CITY OF MIDDLETOWN |
| Other Name | Mapes Dam |
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.