Middle Hancock Llc Dam Reservoir Report
Last Updated: December 19, 2025
Middle Hancock LLC Dam, located in Peterborough, New Hampshire, serves multiple purposes including fire protection, stock, and a small fish pond.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1976, this earth dam stands at a height of 8.5 feet and has a storage capacity of 100 acre-feet. The dam, designed as a buttress structure, spans 350 feet in length and has a surface area of 23.5 acres, with a drainage area of 0.68 square miles.
Managed by a private owner, Middle Hancock LLC Dam is regulated by the New Hampshire Department of Environmental Services Dam Bureau. With a low hazard potential and fair condition assessment, the dam underwent its last inspection in June 2019. Despite its moderate risk assessment level, the dam is deemed to meet guidelines, although details on emergency action plans and risk management measures are currently unavailable. Additionally, the dam's spillway type is listed as uncontrolled with a width of 4 feet, capable of handling a maximum discharge of 700 cubic feet per second.
For water resource and climate enthusiasts, Middle Hancock LLC Dam offers a fascinating case study in dam infrastructure management and regulatory oversight. Its unique blend of uses, from fire protection to supporting aquatic life, highlights the versatility of water resource projects. The dam's location in the Hillsborough County of New Hampshire, on an unnamed brook, adds to its ecological significance within the region. With ongoing inspections and state regulation in place, the dam serves as a vital component of the local water management system, exemplifying the intersection of human needs and environmental stewardship.
Year Completed |
1976 |
Dam Length |
350 |
Dam Height |
8.5 |
River Or Stream |
UNNAMED BROOK |
Primary Dam Type |
Earth |
Surface Area |
23.5 |
Drainage Area |
0.68 |
Nid Storage |
100 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
9 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Middle Hancock Llc Dam
MacDowell Reservoir boat launch