Lyle Reservoir Report
Nearby: Prevost #2 Dunlap
Last Updated: December 18, 2025
Lyle is a private earth dam located in Richland, Montana, designed by USDA NRCS and completed in 1954 for fire protection, stock, or small fish pond purposes.
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Summary
Situated on TR-FOX CREEK in the city of SIDNEY, Lyle stands at a height of 10 feet with a length of 250 feet and a storage capacity of 50 acre-feet. The dam is regulated by the DNRC and undergoes regular state inspections, enforcement, and permitting to ensure its safety and compliance with state regulations.
Despite its low hazard potential and current "Not Rated" condition assessment, Lyle serves as a crucial water resource infrastructure in the area, providing essential functions for fire protection, livestock, and fish habitat. The dam's strategic location and design contribute to its effectiveness in managing water resources and supporting the local ecosystem. With a history dating back to 1954, Lyle has consistently met its primary purposes while being continuously monitored for any necessary maintenance or improvements to uphold its operational efficiency.
As a significant feature in the water resource network of Montana, Lyle showcases the collaborative efforts between federal agencies like USDA NRCS and state agencies like DNRC in managing and regulating dam structures for multiple purposes. With its proximity to the Omaha District and under the jurisdiction of Congressional District 00, Montana, Lyle represents a model of responsible dam construction and operation that aligns with both federal and state guidelines. For water resource and climate enthusiasts, Lyle offers a compelling case study on the importance of sustainable infrastructure development and management in ensuring water security and environmental resilience.
Year Completed |
1954 |
Dam Length |
250 |
Dam Height |
10 |
River Or Stream |
TR-FOX CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
10 |
Drainage Area |
4.34 |
Nid Storage |
50 |
Hazard Potential |
Low |
Nid Height |
10 |
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.
Lyle