Trout Lake Reservoir Report

Last Updated: December 4, 2025

Trout Lake, located in San Miguel County, Colorado, is a captivating and historically significant hydroelectric facility that was completed in 1910.


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Summary

Managed by a public utility, the dam stands at a height of 43 feet with a normal storage capacity of 2500 acre-feet. The primary purpose of the dam is hydroelectric power generation, but it also offers recreational opportunities for visitors to enjoy the scenic beauty of the surrounding area.

With a spillway type categorized as 'Uncontrolled', Trout Lake has a high hazard potential and a moderate risk assessment rating. The dam, designed by C.T. Main, Inc., is regulated by the Federal Energy Regulatory Commission and falls under state jurisdiction for permitting, inspection, and enforcement. The South Fork San Miguel River-tr flows through the area, providing a picturesque backdrop for outdoor activities such as fishing and boating.

Trout Lake's strategic location and structural design make it an essential feature in the water resource management of the region. As a key player in both energy production and recreation, the dam serves as a testament to the harmonious coexistence of human development with the natural environment, making it a must-visit destination for water resource and climate enthusiasts seeking to appreciate the intersection of technology and nature.

Year Completed

1910

Dam Length

570

Dam Height

43

River Or Stream

South Fork San Miguel River-tr

Primary Dam Type

Earth

Surface Area

138

Hydraulic Height

22

Drainage Area

13

Nid Storage

3200

Structural Height

43

Hazard Potential

High

Nid Height

43
       
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.