Willow Creek Bor Co Reservoir Report

Last Updated: December 5, 2025

Willow Creek Bor Co, located in Grand County, Colorado, is a federal irrigation structure managed by the Bureau of Reclamation.


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Summary

This earth dam, completed in 1953, stands at a height of 95 feet and serves the primary purpose of irrigation for the surrounding area. With a storage capacity of over 11,000 acre-feet and a surface area of 303 acres, Willow Creek Bor Co plays a crucial role in water resource management in the region.

The dam on Willow Creek not only supports irrigation but also provides recreational opportunities for the community. Managed by the Bureau of Reclamation, this structure is regulated by the state of Colorado, ensuring proper inspection, permitting, and enforcement measures are in place. With a spillway width of 354 feet and a maximum discharge capacity of 3150 cubic feet per second, Willow Creek Bor Co is equipped to handle high hazard potential situations with a moderate risk assessment rating.

Water resource and climate enthusiasts will appreciate the engineering and management efforts that go into maintaining Willow Creek Bor Co. With a focus on efficient water use for irrigation and recreational purposes, this federal structure stands as a testament to sustainable water management practices in the region. As a vital component of the local water infrastructure, Willow Creek Bor Co plays a significant role in ensuring water security for the community and the environment.

Year Completed

1953

Dam Length

1100

Dam Height

95

River Or Stream

WILLOW CREEK

Primary Dam Type

Earth

Surface Area

303

Hydraulic Height

95

Drainage Area

127

Nid Storage

11177

Structural Height

127

Outlet Gates

Slide (sluice gate) - 4

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

127
       
Seasonal Comparison

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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.