Chateaugay Chasm is a concrete dam located in Franklin County, New York, built in 1954. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 63 ft63 ft tall and 40 ft long, taller than 95% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Chateaugay Chasm
The primary purpose of Chateaugay Chasm is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Ampersand Hydro, LLC (private). It impounds the Chateaugay River near Brayton Hollow.
The dam stands 63 feet tall and stretches 40 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 73 acre-feet, and collects water from a drainage area of 118 square miles. Completed in 1954, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/08/2022.
At 63 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | New York |
| County | Franklin |
| Nearest City | Brayton Hollow |
| River/Stream | Chateaugay River |
| Coordinates | 44.93180, -74.11250 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 63 ft |
| Dam Height | 63 ft |
| Dam Length | 40 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 73 acre-ft |
| Max Storage | 73 acre-ft |
| Normal Storage | 73 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 118 sq mi |
| Max Discharge | 2,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Ampersand Hydro, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/08/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY00473 |
| Federal ID | NY00473 |
| More Info | State Dam Safety Program |