Sly Pond Dam is an earth dam located in Washington County, New York, built in 1896. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 14 ft14 ft tall and 216 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Sly Pond Dam
The primary purpose of Sly Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Boy Scouts of America-mohican Council (private). It impounds the Tr-halfway Creek near West Fort Ann.
The dam stands 14 feet tall and stretches 216 feet across, creates a reservoir covering 51 acres, has a maximum storage capacity of 816 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1896, the structure is over a century 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. 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 05/03/2022.
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Location
| State | New York |
| County | Washington |
| Nearest City | West Fort Ann |
| River/Stream | Tr-halfway Creek |
| Coordinates | 43.45139, -73.59389 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 216 ft |
| Year Completed | 1896 (130 years old) |
Storage & Hydraulics
| NID Storage | 816 acre-ft |
| Max Storage | 816 acre-ft |
| Normal Storage | 459 acre-ft |
| Surface Area | 51 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Boy Scouts of America-mohican Council |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/03/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00885 |
| Federal ID | NY00885 |
| More Info | State Dam Safety Program |