Little Boy Blue Reservoir Report
Nearby: Korneman Arbuckle #2
Last Updated: December 5, 2025
Little Boy Blue is a privately owned irrigation dam located in Capitol, Montana, along the TR-Twelve Mile Creek.
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Summary
Built in 1919, this Earth-type dam stands at a height of 12 feet and has a storage capacity of 282 acre-feet. With a primary purpose of irrigation, it plays a crucial role in water management in Carter County. The dam is regulated by the Montana Department of Natural Resources and Conservation, ensuring proper permitting, inspection, and enforcement measures are in place.
Despite its low hazard potential, Little Boy Blue has not been rated for its condition assessment. It is situated in a picturesque location, surrounded by the beauty of nature and serving as a vital water resource for the local community. The dam's construction and operation are overseen by private owners, with no federal involvement in its funding, design, or maintenance. As a significant part of the irrigation infrastructure in the area, Little Boy Blue contributes to sustainable water use and agricultural practices.
The dam's historical significance, coupled with its functional importance, underscores the intersection of water resource management and climate resilience. As water enthusiasts and climate advocates, understanding the role of structures like Little Boy Blue in maintaining a balanced ecosystem and supporting agricultural activities is essential. By recognizing the value of such infrastructure and ensuring proper regulation and maintenance, we can work towards a more sustainable and resilient water future for Montana and beyond.
Year Completed |
1919 |
Dam Length |
180 |
Dam Height |
12 |
River Or Stream |
TR-TWELVE MILE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Nid Storage |
282 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Little Boy Blue