Mountain Supply # 6 Reservoir Report

Last Updated: December 5, 2025

Mountain Supply # 6, also known as Spitzer, is a privately owned irrigation dam located in Larimer County, Colorado.


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Summary

Built in 1910, this earth dam stands at a height of 8 feet and spans a length of 1200 feet, providing a storage capacity of 98 acre-feet. Despite its low hazard potential, the dam's condition was reported as unsatisfactory during its last inspection in October 2013, raising concerns about its risk management and emergency preparedness.

Situated on Dry Creek-TR, Mountain Supply # 6 plays a crucial role in providing water for irrigation purposes in the region. While it is state-regulated and subject to inspections and enforcement by the Colorado Division of Water Resources, the dam's outdated infrastructure and elevated risk assessment highlight the need for proactive maintenance and risk mitigation measures. As climate change impacts water resources, the resilience and safety of structures like Mountain Supply # 6 become increasingly important to ensure sustainable water management in the face of changing environmental conditions.

As water resource and climate enthusiasts, monitoring and addressing the condition and risk profile of dams like Mountain Supply # 6 is essential for protecting both water supply and public safety. By investing in maintenance, emergency preparedness, and risk management measures, stakeholders can ensure the continued functionality and safety of critical water infrastructure in the face of a changing climate and evolving regulatory landscape.

Year Completed

1910

Dam Length

1200

Dam Height

8

River Or Stream

DRY CREEK-TR

Primary Dam Type

Earth

Surface Area

15

Hydraulic Height

8

Nid Storage

98

Structural Height

8

Hazard Potential

Low

Nid Height

8
       
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.