Greenleaf Dike
Greenleaf Dike is an earth dam located in Orange County, New York, built in 1925. It carries a High hazard potential classification and has a fair condition assessment.
About Greenleaf Dike
The primary purpose of Greenleaf Dike 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 Middletown (local government). It impounds the Tr-little Shawangunk Kill near Baileyville.
The dam stands 32 feet tall and stretches 333 feet across, creates a reservoir covering 101 acres, has a maximum storage capacity of 1,633 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1925, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 04/03/2025.
At 32 feet, this dam is taller than 76% of dams nationwide.
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 | Orange |
| Nearest City | Baileyville |
| River/Stream | Tr-little Shawangunk Kill |
| Coordinates | 41.44778, -74.50389 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 333 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 1,633 acre-ft |
| Max Storage | 1,633 acre-ft |
| Normal Storage | 1,332 acre-ft |
| Surface Area | 101 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF MIDDLETOWN |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 04/03/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00508 |
| Federal ID | NY00508 |
| More Info | State Dam Safety Program |