Hopkinton Sewage Lagoon Dam
Key Takeaway
Hopkinton Sewage Lagoon Dam is classified as significant hazard in New Hampshire. It was completed in 1983 and is 43 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 18 ft (taller than 63.5% in NH) |
| Dam Length | 380 ft |
| Dam Type | Earth |
| Max Storage | 12 acre-ft |
| Normal Storage | 10 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1983 (43 years old) |
| NID ID | NH00727 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
TOWN OF HOPKINTON
Local Government
Nearby Dams
Hopkinton
Merrimack, NH
Low Hazard 10 ftHopkinton Dam - Dike H-3
Merrimack, NH
High Hazard 66 ftHopkinton Dam - Dike H-2
Merrimack, NH
High Hazard 77 ftHoague - Sprague
Merrimack, NH
Significant Hazard 14 ftHopkinton Dam
Merrimack, NH
High Hazard 71 ftKimball Lake Dam
Merrimack, NH
Low Hazard 7 ftTransfer Station Lagoons Dam
Merrimack, NH
Significant HazardGrassy Pond Dam
Merrimack, NH
Low Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Hopkinton Sewage Lagoon Dam?
Hopkinton Sewage Lagoon Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Hopkinton Sewage Lagoon Dam?
Hopkinton Sewage Lagoon Dam is owned by TOWN OF HOPKINTON (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hopkinton Sewage Lagoon Dam built?
Hopkinton Sewage Lagoon Dam was completed in 1983, making it 43 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Hopkinton Sewage Lagoon Dam?
Hopkinton Sewage Lagoon Dam serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hopkinton Sewage Lagoon Dam?
Hopkinton Sewage Lagoon Dam has a dam height of 18 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Hopkinton Sewage Lagoon Dam last inspected?
Hopkinton Sewage Lagoon Dam was last inspected on September 10, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.