Lost Lake Dam & Dike is an earth dam located in Putnam County, New York, built in 1977. It carries a Low hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 900 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 Lost Lake Dam & Dike
The primary purpose of Lost Lake Dam & Dike is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lost Lake Association (private). It impounds the Tr-e Branch Croton River near Brewster.
The dam stands 10 feet tall and stretches 900 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 362 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1977, the structure is 49 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 11/20/2020.
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Location
| State | New York |
| County | Putnam |
| Nearest City | Brewster |
| River/Stream | Tr-e Branch Croton River |
| Coordinates | 41.45278, -73.54556 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 900 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 362 acre-ft |
| Max Storage | 362 acre-ft |
| Normal Storage | 160 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 259 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lost Lake Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 11/20/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY01393 |
| Federal ID | NY01393 |
| More Info | State Dam Safety Program |