Rock Lake Dam is a concrete dam located in Sullivan County, New York, built in 1960. It carries a Significant hazard potential classification.
Dam profile
NID height · 7 ft7 ft tall and 10 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Rock Lake Dam
The primary purpose of Rock Lake 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 Greater New York Councils (private). It impounds the Tr-tenmile River near Tusten.
The dam stands 7 feet tall and stretches 10 feet across, creates a reservoir covering 38 acres, and has a maximum storage capacity of 100 acre-feet. Completed in 1960, the structure is well into its service life at over 50 years 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. The most recent inspection on record was 12/31/2001. That was over 24 years ago.
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Location
| State | New York |
| County | Sullivan |
| Nearest City | Tusten |
| River/Stream | Tr-tenmile River |
| Coordinates | 41.55667, -75.00500 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 10 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 38 acres |
| Max Discharge | 68 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Boy Scouts of America Greater New York Councils |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 12/31/2001 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01324 |
| Federal ID | NY01324 |
| More Info | State Dam Safety Program |