Mcmahon #2 Reservoir Report

Reservoir Report

Colorado

Nearby: Lewis Woods

Last Updated: December 28, 2025

Located in Kremmling, Colorado, McMahon #2, also known as Red Dirt Reservoir, is a privately owned earth dam structure built in 1913 for irrigation purposes on Red Dirt Creek.

°F

mph

Wind

%

Humidity

Summary

With a dam height of 48 feet and a storage capacity of 4570 acre-feet, this reservoir provides essential water resources for agricultural activities in the area. The dam has undergone several modifications over the years, enhancing its hydraulic, mechanical, and structural components to ensure its continued functionality.

Despite being classified as having a significant hazard potential and a fair condition assessment, McMahon #2 is regularly inspected by the Colorado Division of Water Resources to ensure its safety and integrity. The dam features an uncontrolled spillway and a slide (sluice gate) outlet gate, emphasizing a commitment to effective water management and emergency preparedness. With a moderate risk assessment rating, ongoing risk management measures are in place to address any potential challenges and maintain the stability of the structure for future generations.

Overall, McMahon #2 serves as a vital component of the local water infrastructure, highlighting the importance of sustainable water resource management in the face of changing climatic conditions. Its historical significance, engineering design, and continued maintenance efforts showcase a dedication to preserving water resources and adapting to the evolving needs of the community in a region known for its reliance on irrigation for agricultural production.

Years Modified	1945 - Hydraulic, 1945 - Mechanical, 1945 - Structural, 1999 - Hydraulic, 1999 - Mechanical
Year Completed	1913
Dam Length	987
Dam Height	48
River Or Stream	RED DIRT CREEK
Primary Dam Type	Earth
Surface Area	196
Hydraulic Height	48
Drainage Area	14
Nid Storage	4570
Structural Height	48
Outlet Gates	Slide (sluice gate) - 1
Hazard Potential	Significant
Foundations	Rock, Soil
Nid Height	48

Explore Interactive Map

MCMAHON #2

Reservoir Report • Water Levels • Weather Forecast

December 28, 2025

Years_Modified	1945 - Hydraulic, 1945 - Mechanical, 1945 - Structural, 1999 - Hydraulic, 1999 - Mechanical
Year_Completed	1913
Dam_Length	987
Dam_Height	48
River_Or_Stream	RED DIRT CREEK
Primary_Dam_Type	Earth
Surface_Area	196
Hydraulic_Height	48
Drainage_Area	14
Nid_Storage	4570
Structural_Height	48
Outlet_Gates	Slide (sluice gate) - 1
Hazard_Potential	Significant
Foundations	Rock, Soil
Nid_Height	48

Seasonal Comparison

Weather Forecast

Nearby Streamflow Levels

Muddy Creek Above Antelope Creek Nr. Kremmling 7.5cfs	8cfs
Muddy Crk Blw Wolford Mtn Reser. Nr Kremmling 24.1cfs	24cfs
Colorado River Near Kremmling 417.0cfs	417cfs
Yampa River Below Stagecoach Reservoir 35.8cfs	36cfs
Yampa River Above Stagecoach Reservoir 33.3cfs	33cfs
Walton Creek Near Steamboat Springs -999.00cfs	-999cfs

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.