Gill
Key Takeaway
Gill is classified as low hazard in Massachusetts. It was completed in 1970 and is 56 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 65 ft (taller than 97.5% in MA) |
| Dam Length | 493 ft |
| Dam Type | Concrete |
| Max Storage | 21.5K acre-ft |
| Normal Storage | 16.6K acre-ft |
| Surface Area | 2,000 acres |
| Drainage Area | 7,163 sq mi |
| Max Discharge | 56,000 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | MA00849 |
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
FirstLight Power Services LLC
Public Utility
Nearby Dams
Greenfield Electric Light & Power Dam
Franklin, MA
Significant Hazard 21 ftRichard Clapp Dam
Franklin, MA
Significant Hazard 11 ftPumping Station Dam
Franklin, MA
Significant Hazard 22 ftUpper Glen Reservoir Dam
Franklin, MA
Significant Hazard 59 ftNelson Mills Pond Dam
Franklin, MA
Significant Hazard 27 ftWhitmore Pond Dam
Franklin, MA
Significant Hazard 13 ftNorthfield Mt. - Main Dam
Franklin, MA
High Hazard 145 ftStandish Chard Dam
Franklin, MA
Significant Hazard 34 ftFrequently Asked Questions
What is the hazard classification of Gill?
Gill 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 Gill?
Gill is owned by FirstLight Power Services LLC (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gill built?
Gill was completed in 1970, making it 56 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 Gill?
Gill serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Gill?
Gill has a dam height of 65 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 Gill last inspected?
Gill was last inspected on July 25, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.