Holley Waste Weir Dam is a concrete dam located in Orleans County, New York, built in 1918. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 93 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Holley Waste Weir Dam
The primary purpose of Holley Waste Weir Dam is navigation. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway. The dam is owned by New York State Canal Corporation (state). It impounds the East Br. Sandy Creek.
The dam stands 15 feet tall and stretches 93 feet across, creates a reservoir covering 890 acres, has a maximum storage capacity of 10,488 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1918, the structure is over a century 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. The most recent inspection on record was 09/16/2020.
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Location
| State | New York |
| County | Orleans |
| River/Stream | East Br. Sandy Creek |
| Coordinates | 43.22522, -78.01694 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 93 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 10,488 acre-ft |
| Max Storage | 10,488 acre-ft |
| Normal Storage | 8,640 acre-ft |
| Surface Area | 890 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 957 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Navigation |
| Owner | New York State Canal Corporation |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/16/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY17172 |
| Federal ID | NY17172 |
| More Info | State Dam Safety Program |