Risdon Pond Dam
Risdon Pond Dam is an earth dam located in New Haven County, Connecticut, built in 1890. It carries a Significant hazard potential classification and has a unsatisfactory condition assessment.
About Risdon Pond Dam
The primary purpose of Risdon Pond Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Lin (local government). It impounds the Hopeville Pond Brook near Naugatuck.
The dam stands 27 feet tall and stretches 150 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 11 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1890, 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. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 10/19/2022.
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Location
| State | Connecticut |
| County | New Haven |
| Nearest City | Naugatuck |
| River/Stream | Hopeville Pond Brook |
| Coordinates | 41.52613, -73.03937 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 150 ft |
| Year Completed | 1890 (136 years old) |
Storage & Hydraulics
| NID Storage | 11 acre-ft |
| Max Storage | 11 acre-ft |
| Normal Storage | 8 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 220 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Lin |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 10/19/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00176 |
| Federal ID | CT00176 |
| More Info | State Dam Safety Program |