Tuller Reservoir Dam Reservoir Report

Last Updated: December 7, 2025

Tuller Reservoir Dam, located in West Simsbury, Connecticut, is a public utility structure that serves multiple purposes, with recreation being its primary focus.


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Summary

Completed in 1900, this Earth-type dam stands at a height of 45.5 feet and has a storage capacity of 175 acre-feet. The dam is situated on the Hop Brook river, within the Hartford County of Connecticut, making it a key feature for water resource management in the region.

The dam's significant hazard potential warrants regular inspections, with the last assessment conducted in September 2011. While the condition of the dam is currently not rated, emergency action plans have been prepared and updated to ensure public safety. With a spillway width of 18 feet and a maximum discharge capacity of 415 cubic feet per second, the Tuller Reservoir Dam plays a crucial role in mitigating flood risks and managing water levels in the area.

Despite its age, the Tuller Reservoir Dam continues to be a vital infrastructure for the community, offering recreational opportunities and safeguarding against potential hazards. As a state-regulated structure under the jurisdiction of the Department of Energy and Environmental Protection (DEEP), this dam serves as a prime example of sustainable water resource management and climate resilience in the state of Connecticut.

Year Completed

1900

Dam Length

240

Dam Height

45.5

River Or Stream

HOP BROOK

Primary Dam Type

Earth

Surface Area

10

Drainage Area

0.73

Nid Storage

175

Hazard Potential

Significant

Nid Height

46
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.