Wequaquet Lake Dam Reservoir Report
Nearby: Lumbert Pond Dam Mill Pond Dam
Last Updated: December 21, 2025
Wequaquet Lake Dam in Barnstable, Massachusetts is a concrete buttress structure with a primary purpose of recreation.
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Summary
The dam is owned by the local government and is regulated by the Department of Conservation and Recreation. It has a height of 7 feet and a hydraulic height of 1.5 feet, with a storage capacity of 2212 acre-feet and a surface area of 1 acre. The dam is considered to have a significant hazard potential but was assessed to be in satisfactory condition as of September 2015.
Located on an unnamed river or stream, Wequaquet Lake Dam has a drainage area of 3.82 square miles and is part of the New England District. The dam has an uncontrolled spillway type and has not been modified in recent years. It is inspected every 5 years and has emergency action plans in place. Despite its moderate risk rating, the dam meets guidelines for its emergency preparedness. With its picturesque setting and importance for recreation, Wequaquet Lake Dam serves as a vital water resource for the community and a focal point for climate enthusiasts in the area.
Dam Length |
32 |
Dam Height |
7 |
River Or Stream |
UNNAMED |
Primary Dam Type |
Concrete |
Surface Area |
1 |
Hydraulic Height |
1.5 |
Drainage Area |
3.82 |
Nid Storage |
2212 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
7 |
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.
Wequaquet Lake Dam
Hathaway Pond Boat Ramp