Yaskot & Ahearn Spillway is a concrete dam located in New Haven County, Connecticut, built in 1880. It carries a Significant hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 80 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 Yaskot & Ahearn Spillway
The primary purpose of Yaskot & Ahearn Spillway is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Jeffrey Ahearn & Donald R. Ahearn (private). It impounds the Quinnipiac River near Wallingford.
The dam stands 10 feet tall and stretches 80 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 98 square miles. Completed in 1880, the structure is over a century 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.
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Location
| State | Connecticut |
| County | New Haven |
| Nearest City | Wallingford |
| River/Stream | Quinnipiac River |
| Coordinates | 41.49308, -72.82027 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 80 ft |
| Year Completed | 1880 (146 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 54 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 98 sq mi |
| Max Discharge | 2,104 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Jeffrey Ahearn & Donald R. Ahearn |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00629 |
| Federal ID | CT00629 |
| More Info | State Dam Safety Program |