Harper And Sons Reservoir Report

Last Updated: December 5, 2025

Harper and Sons, also known as the Ed W Harper Reservoir, is a private water resource located in Routt County, Colorado.


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Summary

This reservoir, completed in 1947, serves multiple purposes including irrigation, fire protection, stock, small fish ponds, and fish and wildlife habitats. With a storage capacity of 330 acre-feet, this earth dam structure stands at 29 feet tall and spans 536 feet in length along Egeria Creek.

Managed and regulated by the Colorado Department of Water Resources, Harper and Sons has a low hazard potential and is considered to be in fair condition as of the last inspection in June 2020. The reservoir's spillway, which is uncontrolled, has a width of 16 feet allowing for a maximum discharge of 809 cubic feet per second. Despite its moderate risk assessment, the reservoir's emergency action plan status and risk management measures are currently unspecified.

For water resource and climate enthusiasts, Harper and Sons offers a fascinating glimpse into private water management practices in Colorado. With its historical significance, multiple uses, and regulatory oversight, this reservoir serves as a vital resource for irrigation and conservation efforts in the region. Its location in the picturesque city of Toponas adds to its charm, making it a notable feature in the local landscape for both visitors and residents alike.

Year Completed

1947

Dam Length

536

Dam Height

29

River Or Stream

EGERIA CREEK

Primary Dam Type

Earth

Surface Area

20

Hydraulic Height

30

Drainage Area

3

Nid Storage

330

Structural Height

34

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

34
       
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.