Mountain Supply # 7 Reservoir Report

Last Updated: December 5, 2025

Mountain Supply #7, also known as Bubbles, is a privately owned irrigation dam located in Larimer County, Colorado.


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Summary

Built in 1908, this Earth-type dam stands at 14 feet tall and spans 1060 feet in length, with a storage capacity of 248 acre-feet. Situated on Boxelder Creek, this dam plays a vital role in water supply management for agricultural purposes in the area.

Despite its age, Mountain Supply #7 is in fair condition with a low hazard potential according to its last inspection in 2015. The dam features an uncontrolled spillway with a width of 10 feet and a maximum discharge capacity of 406 cubic feet per second. While the risk assessment deems it as moderate, the dam's emergency action plan status and risk management measures are currently unspecified, leaving room for improvement in disaster preparedness and response.

With its strategic location in Wellington and contribution to irrigation in the region, Mountain Supply #7 serves as a significant water resource infrastructure. As enthusiasts of water resources and climate, it is essential to monitor and support the maintenance and safety measures of such dams to ensure sustainable water management practices and mitigate potential risks for the community and the environment.

Year Completed

1908

Dam Length

1060

Dam Height

14

River Or Stream

BOXELDER CR-TR

Primary Dam Type

Earth

Surface Area

35

Hydraulic Height

14

Nid Storage

248

Structural Height

14

Hazard Potential

Low

Nid Height

14
       
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.