Indian Lake Dam Reservoir Report
Last Updated: December 16, 2025
Indian Lake Dam, located in Worcester, Massachusetts, is a concrete structure completed in 1920 with a primary purpose of "Other." The dam, standing at 17 feet high with a hydraulic height of 12 feet, holds a storage capacity of 2400 acre-feet and serves the purpose of regulating the flow of the tributary of Weasel Brook.
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Summary
Managed by the Department of Conservation and Recreation, the dam is state-regulated and undergoes regular inspections to ensure its structural integrity.
With a spillway type of "Uncontrolled," Indian Lake Dam has a significant hazard potential and is categorized as being in fair condition as of the last assessment in January 2017. The dam has a drainage area of 5.64 square miles and a surface area of 233 acres, making it a crucial water resource for the region. The risk assessment for the dam is moderate, and it is important for water resource and climate enthusiasts to monitor its condition and management measures to prevent any potential emergencies.
In the event of an emergency, it is essential for the dam to have an Emergency Action Plan (EAP) in place to meet guidelines and ensure the safety of surrounding communities. With a risk management plan yet to be defined and updated, the stakeholders and authorities need to prioritize the preparation of inundation maps and coordination of emergency contacts to mitigate any risks associated with the dam. Regular monitoring and maintenance of Indian Lake Dam are vital to safeguarding both the water resources and the local ecosystem that depend on its proper functioning.
Year Completed |
1920 |
Dam Length |
370 |
Dam Height |
17 |
River Or Stream |
TRIBUTARY OF WEASEL BROOK |
Primary Dam Type |
Concrete |
Surface Area |
233 |
Hydraulic Height |
12 |
Drainage Area |
5.64 |
Nid Storage |
2400 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
17 |
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.
Indian Lake Dam
Tamarack Lane 37, Shrewsbury