Mashpee River (Rte 130) Dam Reservoir Report
Nearby: Santuit Pond Dam Johns Pond Dam
Last Updated: December 21, 2025
The Mashpee River (Rte 130) Dam, located in Massachusetts, is a significant structure regulated by the Department of Conservation and Recreation.
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Summary
This earth dam with a height of 12 feet serves a primary purpose that is classified as "Other," and has a storage capacity of 26 acre-feet. The dam's spillway type is controlled, indicating management of water flow, and it has a significant hazard potential with a fair condition assessment.
The Mashpee River Dam plays a crucial role in managing water resources in the area, with a drainage area of 14 square miles and a normal storage capacity of 4.5 acre-feet. The dam, with a length of 250 feet, is situated on the Mashpee River and is designed to hold back water to prevent flooding and ensure a stable water supply. Despite its fair condition assessment, the dam's risk assessment is very high, highlighting the importance of ongoing monitoring and maintenance to mitigate potential risks.
With its significant hazard potential and risk assessment rating, the Mashpee River Dam underscores the importance of effective water resource management and climate resilience strategies. As a key structure in the region, it is essential for local government agencies to prioritize regular inspections and maintenance to ensure the dam's continued reliability and safety. The dam's controlled spillway and earth construction type reflect its critical role in safeguarding the surrounding area from potential water-related disasters, making it a focal point for water resource and climate enthusiasts seeking to understand and address the challenges posed by changing environmental conditions.
Dam Length |
250 |
Dam Height |
12 |
River Or Stream |
MASHPEE RIVER |
Primary Dam Type |
Earth |
Surface Area |
1.1 |
Hydraulic Height |
12 |
Drainage Area |
14 |
Nid Storage |
26 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
12 |
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.
Mashpee River (Rte 130) Dam
Lovell's Pond boat ramp