Hinman Reservoir Report

Last Updated: December 5, 2025

Hinman is a private irrigation dam located in Kremmling, Colorado, along the Pass Creek-TR river.


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Summary

Built in 1939, this earth dam stands at 30 feet high and spans 600 feet in length, with a storage capacity of 663 acre-feet. The dam serves multiple purposes including irrigation, fire protection, stock, and small fish pond.

Despite being classified as having a low hazard potential and fair condition assessment, Hinman poses a moderate risk, according to a recent assessment. The dam features an uncontrolled spillway and is equipped with slide and valve outlet gates. The last inspection was conducted in November 2014, with an inspection frequency of 6 years.

Enthusiasts interested in water resources and climate will find Hinman an intriguing case study due to its historical significance, multiple purposes, and moderate risk assessment. With its location in Grand County, Colorado, and its association with Omaha District, this private dam presents a unique opportunity to study the challenges and management strategies involved in maintaining irrigation infrastructure in the face of changing climate conditions.

Year Completed

1939

Dam Length

600

Dam Height

30

River Or Stream

PASS CREEK-TR

Primary Dam Type

Earth

Surface Area

55

Hydraulic Height

30

Drainage Area

1

Nid Storage

663

Structural Height

30

Outlet Gates

Slide (sluice gate) - 1, Valve - 2

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

30
       
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.