Mahoney Pond Dam
Mahoney Pond Dam is an earth dam located in Worcester County, Massachusetts, built in 1964. It carries a Significant hazard potential classification and has a fair condition assessment.
About Mahoney Pond Dam
The primary purpose of Mahoney Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Rodgers Family Holdings Llc (private). It impounds the Mahoney Brook near Gardner.
The dam stands 9 feet tall and stretches 150 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 13 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1964, the structure is well into its service life at over 50 years 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 12/01/2021.
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Location
| State | Massachusetts |
| County | Worcester |
| Nearest City | Gardner |
| River/Stream | Mahoney Brook |
| Coordinates | 42.55646, -71.97675 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Length | 150 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 13 acre-ft |
| Max Storage | 13 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 510 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Rodgers Family Holdings LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/01/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MA02319 |
| Federal ID | MA02319 |
| More Info | State Dam Safety Program |