Loch Lomond Reservoir Report

Last Updated: December 5, 2025

Loch Lomond, nestled in the Clear Creek County of Colorado, is a picturesque reservoir with a primary purpose of irrigation.


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Summary

Completed in 1963, this earth dam stands at 42 feet in height and boasts a storage capacity of 1058 acre-feet, making it a vital resource for water management in the region. With a surface area of 31 acres and a maximum discharge rate of 1200 cubic feet per second, Loch Lomond not only serves essential irrigation needs but also provides opportunities for recreational activities.

Managed by private owners and regulated by the Colorado Department of Water Resources, Loch Lomond plays a crucial role in maintaining the water supply for agricultural purposes in the area. With its high hazard potential and fair condition assessment, the dam undergoes regular inspections to ensure its safety and integrity. Despite its age, Loch Lomond continues to be a valuable asset for the community, balancing the dual roles of water resource management and recreation in the beautiful surroundings of Idaho Springs.

As climate change continues to impact water resources globally, Loch Lomond stands as a symbol of the importance of sustainable water management practices. With its moderate risk assessment and ongoing risk management measures, the reservoir serves as a reminder of the need for proactive planning and maintenance to safeguard essential water supplies for current and future generations. For water resource and climate enthusiasts, Loch Lomond exemplifies the intersection of human ingenuity and natural beauty in the face of evolving environmental challenges.

Year Completed

1963

Dam Length

875

Dam Height

42

River Or Stream

FALL RIVER-TR

Primary Dam Type

Earth

Surface Area

31

Hydraulic Height

43

Drainage Area

1

Nid Storage

1058

Structural Height

45

Hazard Potential

High

Nid Height

45
       
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.