Mill Pond Dam is an earth dam located in Nassau County, New York, built in 1983. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 250 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 Mill Pond Dam
Mill Pond Dam is a dam in Nassau, New York. The dam is owned by Nassau County Department of Public Works (local government). It impounds the Tr-long Island Sound near Oyster Bay.
The dam stands 18 feet tall and stretches 250 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 60 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1983, the structure is 43 years 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 11/07/1983. That was over 42 years ago.
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Location
| State | New York |
| County | Nassau |
| Nearest City | Oyster Bay |
| River/Stream | Tr-long Island Sound |
| Coordinates | 40.87500, -73.54167 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 250 ft |
| Year Completed | 1983 (43 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 42 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 688 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Nassau County Department of Public Works |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/07/1983 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY00134 |
| Federal ID | NY00134 |
| More Info | State Dam Safety Program |