Wykert #4 Reservoir Report

Last Updated: December 5, 2025

Wykert #4 is a vital irrigation structure located in Weld, Colorado, along the Coal Bank Draw river.


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Summary

Built in 1965, this Earth-type dam stands at a height of 12 feet and has a storage capacity of 89 acre-feet. With a normal storage of 62 acre-feet and a drainage area of 32 square miles, Wykert #4 plays a crucial role in providing water for agricultural purposes in the region.

Despite its low hazard potential and moderate risk assessment, Wykert #4 has not received a condition rating. The last inspection date on record was in 1999, with an inspection frequency of 6 years. While the dam's emergency action plan status and risk management measures remain unclear, its location in Congressional District 04 of Colorado underscores its significance in water resource management for the community of Greeley.

Enthusiasts of water resources and climate will find Wykert #4 to be a noteworthy structure that highlights the intersection of infrastructure, regulation, and environmental stewardship. As a state-regulated and permitted dam with enforcement and inspection protocols in place, its role in sustaining agricultural water supply and mitigating risks underscores the importance of proactive monitoring and maintenance to ensure the safety and efficiency of water resource infrastructure in the region.

Year Completed

1965

Dam Length

300

Dam Height

12

River Or Stream

COAL BANK DRAW

Primary Dam Type

Earth

Surface Area

18

Hydraulic Height

8

Drainage Area

32

Nid Storage

89

Structural Height

8

Hazard Potential

Low

Nid Height

12
       
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.