Riverdale Dam
Key Takeaway
Riverdale Dam is classified as low hazard in New Hampshire. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 10 ft (taller than 16% in NH) |
| Dam Length | 90 ft |
| Dam Type | Concrete |
| Max Storage | 153 acre-ft |
| Normal Storage | 87 acre-ft |
| Surface Area | 33 acres |
| Drainage Area | 47 sq mi |
| NID ID | NH01103 |
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
US ARMY CORP OF ENGINEERS
Federal Government
Nearby Dams
Daniels Lake Dam
Hillsborough, NH
Low Hazard 12 ftHadley Falls
Hillsborough, NH
Significant Hazard 20 ftFlintlock Estates Fire Pond Dam
Merrimack, NH
Low Hazard 8 ftEverett Dam
Hillsborough, NH
High Hazard 110 ftGoffstown Lower Reservoir Dam
Hillsborough, NH
High Hazard 30 ftEverett Dam - Dike 1
Hillsborough, NH
High Hazard 50 ftEverett Dam - Dike 2
Hillsborough, NH
High Hazard 30 ftGoffstown Upper Reservoir Dam
Hillsborough, NH
High Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Riverdale Dam?
Riverdale 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 Riverdale Dam?
Riverdale Dam is owned by US ARMY CORP OF ENGINEERS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Riverdale Dam?
Riverdale Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Riverdale Dam?
Riverdale 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 Riverdale Dam last inspected?
Riverdale Dam was last inspected on October 25, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.