Mashapaug Pond Dam #3 North
Mashapaug Pond Dam #3 North is an earth dam located in Tolland County, Connecticut, built in 1900. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Mashapaug Pond Dam #3 North
The primary purpose of Mashapaug Pond Dam #3 North is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Connecticut Deep (state). It impounds the Bigelow Brook near Union.
The dam stands 9 feet tall and stretches 290 feet across, creates a reservoir covering 273 acres, has a maximum storage capacity of 6,725 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1900, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/22/2021.
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Location
| State | Connecticut |
| County | Tolland |
| Nearest City | Union |
| River/Stream | Bigelow Brook |
| Coordinates | 42.02140, -72.13401 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 290 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 6,725 acre-ft |
| Max Storage | 6,725 acre-ft |
| Normal Storage | 5,300 acre-ft |
| Surface Area | 273 acres |
| Drainage Area | 4 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Connecticut DEEP |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/22/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00640 |
| Federal ID | CT00640S03 |
| More Info | State Dam Safety Program |