Hyatt Reservoir Report

Last Updated: December 5, 2025

Hyatt, located in Arvada, Colorado, is a privately owned dam that serves primarily for irrigation purposes.


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Summary

Built in 1863, this earth dam stands at 22 feet tall with a hydraulic height of 18 feet and a structural height of 24 feet. The dam has a storage capacity of 1000 acre-feet, with a normal storage level of 760 acre-feet and a surface area of 73 acres. The dam is situated on the Van Bibber Creek-TR river.

Despite its historical significance, Hyatt poses a high hazard potential and has an unsatisfactory condition assessment. The dam's spillway is uncontrolled with a width of 35 feet, and it has a maximum discharge rate of 625 cubic feet per second. The dam has been inspected annually, with the last assessment conducted on June 26, 2020. With a risk assessment rating of moderate (3), there are potential risks associated with the dam that need to be addressed to ensure the safety of the surrounding community.

In terms of regulation, Hyatt is under the jurisdiction of the Colorado Department of Water Resources and is subject to state permitting, inspection, and enforcement. The dam is not owned or funded by any federal agencies, and there are no associated structures or locks. With its historical significance and crucial role in irrigation, the management and maintenance of Hyatt are essential to mitigate potential risks and ensure the sustainable use of water resources in the region.

Year Completed

1863

Dam Length

1110

Dam Height

22

River Or Stream

VAN BIBBER CREEK-TR

Primary Dam Type

Earth

Surface Area

73

Hydraulic Height

18

Nid Storage

1000

Structural Height

24

Hazard Potential

High

Nid Height

24
       
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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.