Le Gault Reservoir Report

Last Updated: December 5, 2025

Le Gault, located in Broomfield, Colorado, is a privately owned Earth dam completed in 1946 for irrigation purposes along the Big Dry Creek-TR.


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Summary

Standing at 12 feet in height with a hydraulic height of 16 feet, this dam has a maximum storage capacity of 176 acre-feet and a normal storage capacity of 76 acre-feet. With a spillway width of 10 feet, Le Gault has a low hazard potential and a moderate risk assessment rating.

Although Le Gault has not been rated for its condition assessment, it is regulated, permitted, inspected, and enforced by the Colorado Division of Water Resources. This dam is equipped with uncontrolled spillway type and has a moderate risk management measure in place. While it has not been modified over the years and has no associated structures or outlet gates, Le Gault undergoes inspections every six years to ensure its safety and functionality for irrigation purposes.

For water resource and climate enthusiasts, Le Gault serves as a significant structure in the irrigation system of Colorado, contributing to the management of water resources in the region. With its historical completion date and functional design, this privately owned dam plays a crucial role in maintaining water supply for agricultural activities along the Big Dry Creek-TR, highlighting the importance of sustainable water management practices in the face of changing climate conditions.

Year Completed

1946

Dam Length

1345

Dam Height

12

River Or Stream

BIG DRY CREEK-TR

Primary Dam Type

Earth

Surface Area

20

Hydraulic Height

16

Nid Storage

176

Structural Height

16

Hazard Potential

Low

Nid Height

16
       
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.