Sphagnum Pond Dam
Sphagnum Pond Dam is a masonry dam located in Orange County, New York, built in 1930. It carries a Significant hazard potential classification and has a poor condition assessment.
About Sphagnum Pond Dam
The primary purpose of Sphagnum Pond Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Village Of Cornwall-on-hudson (local government). It impounds the Tr-hudson River near Cornwall.
The dam stands 15 feet tall and stretches 580 feet across, creates a reservoir covering 20 acres, and has a maximum storage capacity of 102 acre-feet. Completed in 1930, 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 11/12/2021.
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Location
| State | New York |
| County | Orange |
| Nearest City | Cornwall |
| River/Stream | Tr-hudson River |
| Coordinates | 41.39861, -74.02944 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 580 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 102 acre-ft |
| Max Storage | 102 acre-ft |
| Normal Storage | 95 acre-ft |
| Surface Area | 20 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | VILLAGE OF CORNWALL-ON-HUDSON |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 11/12/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00872 |
| Federal ID | NY00872 |
| More Info | State Dam Safety Program |