Grist Mill Dam
Key Takeaway
Grist Mill Dam is classified as low hazard in Massachusetts. It was completed in 1900 and is 126 years old. Its primary use is recreation.
Physical Details
| Dam Height | 10 ft (taller than 18% in MA) |
| Dam Length | 7 ft |
| Dam Type | Gravity |
| Max Storage | 82 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 4 sq mi |
| Year Completed | 1900 (126 years old) |
| NID ID | MA02726 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
TOWN OF HOPKINTON, BOARD OF SELECTMEN
Local Government
Nearby Dams
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Middlesex, MA
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High Hazard 14 ftHopkinton State Park Swimming Pool Dam
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High Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Grist Mill Dam?
Grist Mill Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Grist Mill Dam?
Grist Mill Dam is owned by TOWN OF HOPKINTON, BOARD OF SELECTMEN (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grist Mill Dam built?
Grist Mill Dam was completed in 1900, making it 126 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 Grist Mill Dam?
Grist Mill Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Grist Mill Dam?
Grist Mill Dam has a dam height of 10 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 Grist Mill Dam last inspected?
Grist Mill Dam was last inspected on July 22, 2009. Inspection dates indicate when a formal review occurred, not the results of that inspection.