Cahoonzie Lake Dam
Cahoonzie Lake Dam is an earth dam located in Orange County, New York, built in 1956. It carries a Significant hazard potential classification.
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 Rated |
| Last Inspection | 04/02/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY01224 |
| Federal ID | NY01224 |
| More Info | State Dam Safety Program |