Lee #11 Reservoir Report
Nearby: Killen #7 Sunday Creek Reservoir
Last Updated: December 6, 2025
Lee #11, located in Kinsey, Montana, is a state-regulated earth dam built in 1950 for irrigation purposes on the TR-South Sunday Creek.
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Summary
With a height of 15 feet and a storage capacity of 89 acre-feet, this dam plays a crucial role in providing water for agricultural activities in the area. Despite its low hazard potential, the condition of Lee #11 is currently not rated, highlighting the need for regular inspections and maintenance to ensure its continued safety and functionality.
This dam, under the jurisdiction of the Montana Department of Natural Resources and Conservation (DNRC), is situated in Rosebud County and falls under Congressional District 00. Although its last inspection date and condition assessment are not specified, the presence of state permitting, inspection, and enforcement processes ensures that necessary measures are in place to address any potential risks associated with the dam. With a primary purpose of irrigation, Lee #11 serves as a vital water resource in the region, storing water for agricultural use and contributing to the sustainability of local farming operations.
As water resource and climate enthusiasts explore the significance of Lee #11, its role in water management and agricultural sustainability becomes evident. With its location in the Omaha District and the oversight of the DNRC, this earth dam stands as a testament to human ingenuity in harnessing water resources for the benefit of communities. Moving forward, continued monitoring and maintenance efforts will be essential to ensure the long-term resilience and functionality of Lee #11, safeguarding its contribution to the region's water security and agricultural productivity.
Year Completed |
1950 |
Dam Length |
250 |
Dam Height |
15 |
River Or Stream |
TR-SOUTH SUNDAY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
89 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Lee #11