Dark Brook Reservoir Dike A Reservoir Report
Last Updated: December 12, 2025
Dark Brook Reservoir Dike A, located in Auburn, Massachusetts, is a significant earth dam built in 1950 for the primary purpose of recreation.
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Summary
The dam stands at a height of 11 feet with a hydraulic height of 5 feet and a length of 375 feet, creating a reservoir with a normal storage capacity of 2597 acre-feet and a surface area of 288 acres. The reservoir serves as a popular recreational spot in Worcester County, offering opportunities for boating, fishing, and other water-based activities.
Managed by the Department of Conservation and Recreation, Dark Brook Reservoir Dike A has a state-regulated status with regular inspections to ensure its satisfactory condition. Despite its significant hazard potential, the dam is maintained to meet high-risk management standards, with a comprehensive risk assessment indicating a risk level of 2 (High). The surrounding area is closely monitored for any potential emergencies, with emergency action plans in place to address any unforeseen situations effectively.
Water resource and climate enthusiasts will appreciate the detailed information available on Dark Brook Reservoir Dike A, including its construction specifications, storage capacity, and risk management measures. This earth dam not only provides recreational opportunities for visitors but also serves as a vital infrastructure for water resource management in the region. Its maintenance and regulatory oversight by state agencies ensure the safety and sustainability of the reservoir for both recreational and environmental purposes in Worcester County, Massachusetts.
Year Completed |
1950 |
Dam Length |
375 |
Dam Height |
11 |
River Or Stream |
DARK BROOK |
Primary Dam Type |
Earth |
Surface Area |
288 |
Hydraulic Height |
5 |
Drainage Area |
2.67 |
Nid Storage |
2597 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Blackstone River
|
104cfs |
French River Below Dam
|
3cfs |
Little River Near Oxford
|
4cfs |
Quinsigamond River At North Grafton
|
8cfs |
Sevenmile River Near Spencer
|
9cfs |
French River At Webster
|
7cfs |
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.
Dark Brook Reservoir Dike A
South Street 178-198, Auburn