Union Village Dam Reservoir Report

Last Updated: December 15, 2025

Union Village Dam, also known as Dry Reservoir, is a gravity dam located in Union Village, Vermont, along the Ompompanoosuc River.


°F

°F

mph

Wind

%

Humidity

Summary

Completed in 1950 by the US Army Corps of Engineers, the dam stands at a height of 164 feet and has a storage capacity of 49,640 acre-feet. Its primary purpose is flood risk reduction, with a spillway width of 388 feet to manage water levels during high flow events.

The dam has a high hazard potential and is monitored regularly by the US Army Corps of Engineers to mitigate flood risks. Emergency action plans are in place, but the dam does not meet all guidelines according to the Risk Assessment. The Corps actively engages with local emergency managers and the public to raise awareness and ensure readiness for any potential dam-related emergencies.

USACE's risk management measures include continuous monitoring, prioritizing activities to reduce risks, and collaborating with local authorities to develop emergency response plans. Regular maintenance and repairs are conducted to ensure the dam's structural integrity. While the dam does not eliminate all flood risks, it plays a crucial role in managing water levels and safeguarding the surrounding area from potential flooding events.

Year Completed

1950

Dam Length

1100

Dam Height

164

River Or Stream

OMPOMPANOOSUC RIVER

Primary Dam Type

Gravity

Surface Area

1

Hydraulic Height

159

Drainage Area

126

Nid Storage

49640

Structural Height

164

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

164
       
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.