Souhegan River Site 33 Dam Reservoir Report
Last Updated: December 17, 2025
Souhegan River Site 33 Dam, also known as Dale Road Dam, is a state-owned structure located in Wilton, New Hampshire.
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Summary
Built in 1971 by the USDA NRCS, this earth dam stands at a height of 21 feet and spans 510 feet across King Brook. Its primary purpose is flood risk reduction, with a storage capacity of 900 acre-feet and a normal storage level of 24 feet.
Managed by the NHDES Dam Bureau, this dam is state-regulated and undergoes regular inspections to ensure its structural integrity. Despite being classified as having a high hazard potential, the condition assessment deems it as satisfactory as of 2018. The spillway type is uncontrolled with a width of 2 feet, and the maximum discharge capacity is 2100 cubic feet per second.
With its location in the Hillsborough County, Souhegan River Site 33 Dam plays a crucial role in managing water resources and mitigating flood risks in the area. As climate change continues to impact weather patterns, structures like this are essential for protecting communities and preserving the ecological balance of the region. Enthusiasts of water resources and climate resilience will find this dam's design and management practices to be of particular interest in understanding how we can adapt to a changing environment.
Year Completed |
1971 |
Dam Length |
510 |
Dam Height |
21 |
River Or Stream |
KING BROOK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
1 |
Nid Storage |
900 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
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.
Souhegan River Site 33 Dam
Melendy Pond boat launch