Shoshone Diversion Dam Reservoir Report

Last Updated: December 5, 2025

The Shoshone Diversion Dam, located on the Colorado River in Glenwood Springs, Colorado, is a concrete structure completed in 1909 by the Central Colorado Power Company.


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Summary

This dam serves a primary purpose of hydroelectric power generation and stands at a height of 21 feet with a hydraulic height of 19 feet. With a maximum storage capacity of 516 acre-feet and a normal storage capacity of 420 acre-feet, the dam plays a crucial role in water resource management in the area.

The Shoshone Diversion Dam has a spillway width of 289 feet and a maximum discharge capacity of 1,782 cubic feet per second. The dam is considered to have a high hazard potential but is currently assessed to be in fair condition. The last inspection in April 2020 showed that the dam meets regulatory standards and is regularly monitored for safety. With its historical significance and continued operation as a vital hydroelectric facility, the Shoshone Diversion Dam is a key component of the water infrastructure in Colorado.

Despite its age, the Shoshone Diversion Dam continues to provide reliable hydroelectric power and water storage for the surrounding area. The dam's association with the Colorado River and its impact on water resource management make it a valuable asset for climate enthusiasts and water resource professionals alike. As efforts to address climate change and promote sustainable water use intensify, the Shoshone Diversion Dam remains a focal point for ensuring water security and energy sustainability in the region.

Year Completed

1909

Dam Length

250

Dam Height

21

River Or Stream

COLORADO RIVER

Primary Dam Type

Concrete

Surface Area

48

Hydraulic Height

19

Drainage Area

4470

Nid Storage

516

Structural Height

32

Hazard Potential

High

Foundations

Rock

Nid Height

32
       
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.