Whiteley Peak Reservoir Report

Nearby: Martin Basin

Last Updated: December 5, 2025

Whiteley Peak, also known as Diamond Creek, is a privately owned earth dam located in Kremmling, Colorado.


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Summary

Built in 1941 by designers B. T. Chase and Herbert Ritschard, this dam serves multiple purposes including irrigation, fire protection, stock maintenance, and water supply. With a height of 60 feet and a length of 775 feet, Whiteley Peak has a storage capacity of 1095 acre-feet, making it a crucial water resource in the region.

Managed by the Colorado Department of Water Resources, Whiteley Peak is regulated and inspected regularly to ensure its structural integrity and operational efficiency. The dam has a spillway width of 15 feet and is equipped with a slide gate for controlled water release. Despite being classified as having a significant hazard potential, the dam's condition is currently assessed as fair, with moderate risk management measures in place to mitigate any potential threats.

With a drainage area of 17 square miles and a maximum discharge capacity of 3675 cubic feet per second, Whiteley Peak plays a vital role in water management and conservation efforts in Grand County, Colorado. Its historical significance, combined with its practical utility for irrigation and other purposes, makes it a noteworthy structure for water resource and climate enthusiasts to study and appreciate.

Years Modified

1970 - Structural

Year Completed

1941

Dam Length

775

Dam Height

60

River Or Stream

DIAMOND CR

Primary Dam Type

Earth

Surface Area

46

Hydraulic Height

60

Drainage Area

17

Nid Storage

1095

Structural Height

62

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

Significant

Foundations

Rock, Soil

Nid Height

62
       
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.