Three Mile River #1 Dam Reservoir Report
Last Updated: December 19, 2025
Three Mile River #1 Dam, located in Taunton, Massachusetts, is a rockfill dam completed in 1943 with a primary purpose of recreation.
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Summary
Standing at a height of 12.5 feet and with a hydraulic height of 8 feet, the dam has a storage capacity of 480 acre-feet and serves a drainage area of 75.8 square miles. Although the dam is classified as having a significant hazard potential, it is currently assessed to be in fair condition as of March 2017.
Managed by a private owner and regulated by the Department of Conservation and Recreation in Massachusetts, the Three Mile River #1 Dam is subject to state permitting, inspection, and enforcement. Despite its age, the dam has been inspected regularly, with the last assessment conducted in March 2017. With a risk assessment rating of moderate (3), the dam's emergency action plan status and risk management measures are currently unspecified. Enthusiasts of water resources and climate will find the data on this dam to be informative and relevant to their interests in monitoring and understanding dam infrastructure in the region.
Year Completed |
1943 |
Dam Length |
950 |
Dam Height |
12.5 |
River Or Stream |
THREE MILE RIVER |
Primary Dam Type |
Rockfill |
Surface Area |
1.4 |
Hydraulic Height |
8 |
Drainage Area |
75.8 |
Nid Storage |
480 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
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.
Three Mile River #1 Dam
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