Upper Lake Dam
Upper Lake Dam is an earth dam located in Suffolk County, New York, built in 1932. It carries a Low hazard potential classification.
About Upper Lake Dam
The primary purpose of Upper Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Brookhaven (local government). It impounds the Carmans River near Yaphank.
The dam stands 8 feet tall and stretches 250 feet across, creates a reservoir covering 19 acres, and has a maximum storage capacity of 68 acre-feet. Completed in 1932, the structure is well-established, with more than 75 years of service.
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 05/06/2009. That was over 16 years ago.
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Location
| State | New York |
| County | Suffolk |
| Nearest City | Yaphank |
| River/Stream | Carmans River |
| Coordinates | 40.84167, -72.93833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 250 ft |
| Year Completed | 1932 (94 years old) |
Storage & Hydraulics
| NID Storage | 68 acre-ft |
| Max Storage | 68 acre-ft |
| Normal Storage | 56 acre-ft |
| Surface Area | 19 acres |
| Max Discharge | 35 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF BROOKHAVEN |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 05/06/2009 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01338 |
| Federal ID | NY01338 |
| More Info | State Dam Safety Program |