St. Charles #3 Reservoir Report

Last Updated: December 12, 2025

Located in Pueblo, Colorado, St.


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Summary

Charles #3, also known as Lake Corwin, is a private earth dam completed in 1913 for water supply purposes. Standing at a height of 53 feet and a length of 8736 feet, this dam holds a storage capacity of 13940 acre-feet, with a normal storage of 8638 acre-feet. The dam, situated on Salt Creek, serves as a recreational spot as well, offering a surface area of 633 acres for visitors to enjoy.

Despite its fair condition assessment, St. Charles #3 poses a high hazard potential, prompting regular inspections by the Colorado Division of Water Resources (DWR). With a maximum discharge capacity of 30500 cubic feet per second, the dam has an uncontrolled spillway with a width of 658 feet. While the risk assessment indicates a moderate level of risk (3), the dam's emergency action plan (EAP) status and adherence to guidelines remain unspecified. Overall, St. Charles #3 stands as a vital water resource structure in the region, safeguarding against water scarcity and supporting recreational activities along Salt Creek.

Year Completed

1913

Dam Length

8736

Dam Height

53

River Or Stream

SALT CREEK

Primary Dam Type

Earth

Surface Area

633

Hydraulic Height

53

Drainage Area

22

Nid Storage

13940

Structural Height

53

Hazard Potential

High

Nid Height

53
       
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.