Cahoonzie Lake Dam is an earth dam located in Orange County, New York, built in 1956. It carries a Significant hazard potential classification.
Dam profile
NID height · 11 ft11 ft tall and 422 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 Cahoonzie Lake Dam
The primary purpose of Cahoonzie Lake Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by The Cahoonzie Club, Inc. (private). It impounds the Tr-shingle Kill near Cahoonzie.
The dam stands 11 feet tall and stretches 422 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 90 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1956, the structure is well into its service life at over 50 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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/02/2025.
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Location
| State | New York |
| County | Orange |
| Nearest City | Cahoonzie |
| River/Stream | Tr-shingle Kill |
| Coordinates | 41.45333, -74.69556 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 422 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 90 acre-ft |
| Max Storage | 90 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 1,300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | The Cahoonzie Club, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 04/02/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY01224 |
| Federal ID | NY01224 |
| More Info | State Dam Safety Program |