Tower Hill Pond Dam Reservoir Report
Last Updated: December 16, 2025
Tower Hill Pond Dam, located in Auburn, New Hampshire, serves as a vital water supply structure for the area, completed in 1938 with a height of 35 feet and a length of 1220 feet.
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Summary
The dam holds a maximum storage capacity of 5020 acre-feet, with a normal storage level of 3960 acre-feet, covering a surface area of 202 acres. Tower Hill Pond Dam is regulated by the NHDES Dam Bureau and undergoes regular state inspections, with a satisfactory condition assessment as of July 2016.
With a high hazard potential, Tower Hill Pond Dam is classified as a moderate risk structure, with a spillway width of 250 feet and an uncontrolled spillway type. Despite its risk level, the dam's emergency action plan status and inundation maps remain unspecified, raising concerns for emergency preparedness. As climate change impacts water resources and infrastructure stability, continued monitoring and maintenance of Tower Hill Pond Dam are crucial for ensuring the safety and sustainability of the surrounding community and environment.
Year Completed |
1938 |
Dam Length |
1220 |
Dam Height |
35 |
River Or Stream |
MAPLE FALLS BROOK |
Primary Dam Type |
Earth |
Surface Area |
202 |
Drainage Area |
12.5 |
Nid Storage |
5020 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
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.
Tower Hill Pond Dam
Massabesic Lake boat launch