Mogisca Lake Dam
Mogisca Lake Dam is an earth dam located in Sullivan County, New York, built in 1976. It carries a Significant hazard potential classification.
About Mogisca Lake Dam
The primary purpose of Mogisca Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Project Morry (private). It impounds the Tr-delaware River.
The dam stands 36 feet tall and stretches 1,200 feet across, creates a reservoir covering 21 acres, has a maximum storage capacity of 487 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1976, the structure is 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/05/2021.
At 36 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | New York |
| County | Sullivan |
| Nearest City | None |
| River/Stream | Tr-delaware River |
| Coordinates | 41.43333, -74.78972 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 487 acre-ft |
| Max Storage | 487 acre-ft |
| Normal Storage | 319 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Project Morry |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 05/05/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00504 |
| Federal ID | NY00504 |
| More Info | State Dam Safety Program |