Mahstedt Reservoir Dam is an earth dam located in Westchester County, New York, built in 1885. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 7,000 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 Mahstedt Reservoir Dam
The primary purpose of Mahstedt Reservoir Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of New Rochelle (local government). It impounds the Tr-pine Brook near New Rochelle.
The dam stands 15 feet tall and stretches 7,000 feet across, creates a reservoir covering 14 acres, and has a maximum storage capacity of 70 acre-feet. Completed in 1885, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 02/02/2009. That was over 17 years ago.
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Location
| State | New York |
| County | Westchester |
| Nearest City | New Rochelle |
| River/Stream | Tr-pine Brook |
| Coordinates | 40.92944, -73.79139 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 7,000 ft |
| Year Completed | 1885 (141 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 56 acre-ft |
| Surface Area | 14 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of New Rochelle |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 02/02/2009 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY13621 |
| Federal ID | NY13621 |
| More Info | State Dam Safety Program |