Maupus Pond Dam
Maupus Pond Dam is a masonry dam located in New Haven County, Connecticut, built in 1920. It carries a Significant hazard potential classification and has a poor condition assessment.
About Maupus Pond Dam
The primary purpose of Maupus Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ct Light And Power Co;maupus Lake Llc (private). It impounds the East River Trib near Guilford.
The dam stands 18 feet tall and stretches 100 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1920, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 12/18/2021.
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Location
| State | Connecticut |
| County | New Haven |
| Nearest City | Guilford |
| River/Stream | East River Trib |
| Coordinates | 41.34204, -72.68897 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 100 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 54 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 5 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | CT Light and Power Co;Maupus Lake LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 12/18/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00409 |
| Federal ID | CT00409 |
| More Info | State Dam Safety Program |