Hopkinton Sewage Lagoon Dam
Hopkinton Sewage Lagoon Dam is an earth dam located in Merrimack County, New Hampshire, built in 1983. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Hopkinton Sewage Lagoon Dam
Hopkinton Sewage Lagoon Dam is a dam in Merrimack, New Hampshire. The dam is owned by Town Of Hopkinton (local government). It impounds the Na near Hopkinton.
The dam stands 18 feet tall and stretches 380 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 12 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1983, the structure is 43 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/10/2019.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Hopkinton |
| River/Stream | Na |
| Coordinates | 43.21520, -71.71550 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 380 ft |
| Year Completed | 1983 (43 years old) |
Storage & Hydraulics
| NID Storage | 12 acre-ft |
| Max Storage | 12 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | TOWN OF HOPKINTON |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/10/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00727 |
| Federal ID | NH00727 |
| More Info | State Dam Safety Program |