Longham Reservoir Dam
Key Takeaway
Longham Reservoir Dam is classified as low hazard in Massachusetts. Its primary use is water supply.
Physical Details
| Dam Height | 15 ft (taller than 48.8% in MA) |
| Dam Length | 240 ft |
| Dam Type | Earth |
| Max Storage | 150 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 4 sq mi |
| NID ID | MA00182 |
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
SALEM-BEVERLY WATER SUPPLY BOARD
Local Government
Nearby Dams
U.S.M.C. Pond Upper Dam
Essex, MA
Significant Hazard 17 ftMile Brook Dam
Essex, MA
Low Hazard 10 ftPutnamville Reservoir East Dike
Essex, MA
High Hazard 24 ftPutnamville Reservoir Dam
Essex, MA
High Hazard 37 ftPutmanville Reservoir South Dike
Essex, MA
High Hazard 7 ftBethune Pond Dam
Essex, MA
Significant Hazard 15 ftMill Pond Dam
Essex, MA
Significant Hazard 17 ftMeadow Dam
Essex, MA
Significant Hazard 7 ftFrequently Asked Questions
What is the hazard classification of Longham Reservoir Dam?
Longham Reservoir 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 Longham Reservoir Dam?
Longham Reservoir Dam is owned by SALEM-BEVERLY WATER SUPPLY BOARD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Longham Reservoir Dam?
Longham Reservoir Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Longham Reservoir Dam?
Longham Reservoir Dam has a dam height of 15 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 Longham Reservoir Dam last inspected?
Longham Reservoir Dam was last inspected on June 22, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.