Massapequa Lake Dam
Massapequa Lake Dam is an earth dam located in Nassau County, New York, built in 1890. It carries a Low hazard potential classification.
About Massapequa Lake Dam
The primary purpose of Massapequa Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nassau County Department Of Public Works (local government). It impounds the Massapequa Creek near Massapequa.
The dam stands 11 feet tall and stretches 350 feet across, creates a reservoir covering 38 acres, and has a maximum storage capacity of 141 acre-feet. Completed in 1890, 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 07/23/1997. That was over 28 years ago.
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Location
| State | New York |
| County | Nassau |
| Nearest City | Massapequa |
| River/Stream | Massapequa Creek |
| Coordinates | 40.66667, -73.46833 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 350 ft |
| Year Completed | 1890 (136 years old) |
Storage & Hydraulics
| NID Storage | 141 acre-ft |
| Max Storage | 141 acre-ft |
| Normal Storage | 135 acre-ft |
| Surface Area | 38 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | NASSAU COUNTY DEPARTMENT OF PUBLIC WORKS |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 07/23/1997 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01512 |
| Federal ID | NY01512 |
| More Info | State Dam Safety Program |