Upper Earlville Reservoir Dam
Upper Earlville Reservoir Dam is an earth dam located in Madison County, New York, built in 1936. It carries a Significant hazard potential classification and has a poor condition assessment.
About Upper Earlville Reservoir Dam
Upper Earlville Reservoir Dam is a dam in Madison, New York. The dam is owned by Harmon Hoff & Eve Ann Shwartz (private). It impounds the Tr-sangerfield River near Earlville.
The dam stands 20 feet tall and stretches 355 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 21 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1936, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 09/23/2024.
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Location
| State | New York |
| County | Madison |
| Nearest City | Earlville |
| River/Stream | Tr-sangerfield River |
| Coordinates | 42.75028, -75.50750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 355 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 21 acre-ft |
| Max Storage | 21 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | HARMON HOFF & EVE ANN SHWARTZ |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 09/23/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY12082 |
| Federal ID | NY12082 |
| More Info | State Dam Safety Program |