White Plains Reservoir #1 Dam
White Plains Reservoir #1 Dam is a concrete dam located in Westchester County, New York, built in 1900. It carries a High hazard potential classification and has a satisfactory condition assessment.
About White Plains Reservoir #1 Dam
The primary purpose of White Plains Reservoir #1 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of White Plains (local government). It impounds the Dealeys Brook near White Plains.
The dam stands 25 feet tall and stretches 360 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 260 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1900, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 02/04/2025.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The New York dam safety program can provide more specific information about emergency planning for this structure.
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 | White Plains |
| River/Stream | Dealeys Brook |
| Coordinates | 41.05750, -73.75917 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 360 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 260 acre-ft |
| Max Storage | 260 acre-ft |
| Normal Storage | 210 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 128 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF WHITE PLAINS |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/04/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00055 |
| Federal ID | NY00055 |
| More Info | State Dam Safety Program |