South Westchester Detention Basin Dam
South Westchester Detention Basin Dam is an earth dam located in Westchester County, New York, built in 1978. It carries a Significant hazard potential classification and has a poor condition assessment.
About South Westchester Detention Basin Dam
South Westchester Detention Basin Dam is a dam in Westchester, New York. The dam is owned by Robert Martin Co., Llc (private). It impounds the Tr-hudson River near Yonkers.
The dam stands 7 feet tall and stretches 110 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 11 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1978, the structure is 48 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 03/20/2024.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New York |
| County | Westchester |
| Nearest City | Yonkers |
| River/Stream | Tr-hudson River |
| Coordinates | 40.96639, -73.87972 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 110 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 11 acre-ft |
| Max Storage | 11 acre-ft |
| Normal Storage | 7 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 433 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | ROBERT MARTIN CO., LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 03/20/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY13629 |
| Federal ID | NY13629 |
| More Info | State Dam Safety Program |