Peconic Lake Dam
Peconic Lake Dam is a concrete dam located in Suffolk County, New York, built in 1915. It carries a Low hazard potential classification.
About Peconic Lake Dam
The primary purpose of Peconic Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Suffolk County Department Of Public Works;town Of Brookhaven (local government). It impounds the Peconic River near Riverhead.
The dam stands 13 feet tall and stretches 636 feet across, creates a reservoir covering 25 acres, and has a maximum storage capacity of 83 acre-feet. Completed in 1915, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 12/13/2022.
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Location
| State | New York |
| County | Suffolk |
| Nearest City | Riverhead |
| River/Stream | Peconic River |
| Coordinates | 40.91250, -72.71361 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 636 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 83 acre-ft |
| Max Storage | 83 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 25 acres |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | SUFFOLK COUNTY DEPARTMENT OF PUBLIC WORKS;TOWN OF BROOKHAVEN |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 12/13/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01513 |
| Federal ID | NY01513 |
| More Info | State Dam Safety Program |