Mosher Dam
Mosher Dam is an earth dam located in Oswego County, New York, built in 1937. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Mosher Dam
Mosher Dam is a dam in Oswego, New York. The dam is owned by Nys Dec (state). It impounds the N Branch Grindstone Creek near Albion Center.
The dam stands 12 feet tall and stretches 370 feet across, creates a reservoir covering 65 acres, has a maximum storage capacity of 264 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1937, the structure is well-established, with more than 75 years of service.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 04/25/2024.
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Location
| State | New York |
| County | Oswego |
| Nearest City | Albion Center |
| River/Stream | N Branch Grindstone Creek |
| Coordinates | 43.46833, -76.00833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 370 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 264 acre-ft |
| Max Storage | 264 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 65 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,320 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | NYS DEC |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/25/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00420 |
| Federal ID | NY00420 |
| More Info | State Dam Safety Program |