Route 25 #1 Dam Reservoir Report
Last Updated: December 20, 2025
Route 25 #1 Dam, located in Wareham, Massachusetts, is a state-regulated structure owned by the Department of Conservation and Recreation.
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Summary
Built in 1964, this earth dam stands at a height of 16 feet and spans 650 feet along an unnamed tributary of the Weweantic River. Its primary purpose is for irrigation, with a storage capacity of 800 acre-feet and a normal storage level of 50 acre-feet.
The dam has a fair condition assessment as of August 2016, with a high hazard potential due to its location and purpose. Despite its moderate risk level, the dam meets state regulatory requirements, with regular inspections and enforcement measures in place. The spillway type is uncontrolled, emphasizing the need for proper management and maintenance to prevent potential safety hazards in case of overflow.
Water resource and climate enthusiasts will be intrigued by the unique design and purpose of Route 25 #1 Dam, as well as its critical role in supporting irrigation activities in the region. Its location within the New England District and the high hazard potential should spark interest in the management and mitigation efforts being taken to ensure the safety and sustainability of the structure for the surrounding communities.
Year Completed |
1964 |
Dam Length |
650 |
Dam Height |
16 |
River Or Stream |
UNNAMED TRIBUTARY OF WEWEANTIC RIVER |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
0.2 |
Nid Storage |
800 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
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.
Route 25 #1 Dam