Deer Lake Reservoir Report

Last Updated: December 21, 2025

Deer Lake in Larimer County, Colorado, is a private water resource managed by the state regulatory agency, Department of Water Resources.


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Summary

Built in 1919, this Earth dam stands at a height of 10 feet and has a storage capacity of 92 acre-feet, primarily used for recreation purposes such as fishing and wildlife observation. With a surface area of 11 acres and located in the Columbine Canyon along the COLUMBINE CANYON river or stream, Deer Lake offers a serene escape just 27 miles from FORT COLLINS.

Despite its low hazard potential and satisfactory condition assessment, Deer Lake poses a high risk factor due to its proximity to the congressional District 02, Colorado. The dam lacks a spillway but has a spillway width of 200 feet, ensuring the safety of the surrounding area in case of overflow. The last inspection in 2013 showed no significant issues, with an inspection frequency of every 6 years. Emergency protocols, including an Emergency Action Plan (EAP), are currently under review to meet safety guidelines and risk management measures.

Water and climate enthusiasts visiting Deer Lake will appreciate its historical significance and recreational offerings, providing a vital water supply while maintaining a focus on wildlife preservation and environmental stewardship. As a picturesque destination for outdoor activities and nature appreciation, Deer Lake stands as a testament to responsible water resource management and the importance of maintaining a balance between human enjoyment and ecological sustainability in the face of changing climate patterns.

Year Completed

1919

Dam Length

185

Dam Height

10

River Or Stream

COLUMBINE CANYON

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

10

Nid Storage

92

Structural Height

10

Hazard Potential

Low

Nid Height

10
       
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.