Treasure Lake Dam is an earth dam located in Sullivan County, New York, built in 1911. It carries a Significant hazard potential classification.
Dam profile
NID height · 7 ft7 ft tall and 100 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 Treasure Lake Dam
The primary purpose of Treasure Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Emerald Green Property Owners Association (private). It impounds the Tr-neversink River near Oakland Valley.
The dam stands 7 feet tall and stretches 100 feet across, creates a reservoir covering 43 acres, has a maximum storage capacity of 345 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1911, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/10/2023.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New York |
| County | Sullivan |
| Nearest City | Oakland Valley |
| River/Stream | Tr-neversink River |
| Coordinates | 41.61333, -74.59306 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 100 ft |
| Year Completed | 1911 (115 years old) |
Storage & Hydraulics
| NID Storage | 345 acre-ft |
| Max Storage | 345 acre-ft |
| Normal Storage | 198 acre-ft |
| Surface Area | 43 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Emerald Green Property Owners Association |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 08/10/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY01200 |
| Federal ID | NY01200 |
| More Info | State Dam Safety Program |