Haynes Reservoir Dam Reservoir Report
Nearby: Morse Reservoir Dam Bartlett Pond Dam
Last Updated: December 12, 2025
Haynes Reservoir Dam, located in Leominster, Massachusetts, is a local government-owned structure used primarily for water supply purposes.
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Summary
This earth dam, with a height of 15 feet and a hydraulic height of 12 feet, helps to store 400 acre-feet of water in its reservoir. The dam, constructed on a tributary of the North Nashua River, has a significant hazard potential and is currently assessed as being in fair condition.
Managed by the Department of Conservation and Recreation in Massachusetts, the Haynes Reservoir Dam is a crucial component of the local water infrastructure, providing a storage capacity of 230 acre-feet for normal operations. With a surface area of 0.88 acres and a drainage area of 0.5 square miles, the dam plays a vital role in ensuring water supply reliability in the region. Despite its moderate risk level, the dam is inspected every 5 years to ensure its structural integrity and safety.
Overall, Haynes Reservoir Dam stands as a key water resource structure in Worcester County, Massachusetts, contributing to the region's water supply needs. With its controlled spillway and earth construction, the dam serves as a critical piece of infrastructure, regulated and inspected by state authorities to mitigate any potential risks. As water resource and climate enthusiasts, understanding the significance of dams like Haynes Reservoir in maintaining water supply reliability and infrastructure resilience is essential for sustainable water management practices.
Dam Length |
680 |
Dam Height |
15 |
River Or Stream |
TRIBUTARY OF NORTH NASHUA RIVER |
Primary Dam Type |
Earth |
Surface Area |
0.88 |
Hydraulic Height |
12 |
Drainage Area |
0.5 |
Nid Storage |
400 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
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.
Haynes Reservoir Dam