Apogee Reservoir Report
Nearby: Mclean Dam (Hill) Perigee
Last Updated: December 6, 2025
Apogee is a private water resource located in Chinook, Montana, along the Willow Coulee stream.
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Summary
Constructed in 1965, this earth dam stands at a height of 30 feet and serves multiple purposes including fire protection, stock watering, and small fish pond management. With a storage capacity of 124 acre-feet, Apogee is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected regularly to ensure compliance with state regulations.
The dam's hazard potential is rated as low, and its condition assessment is currently listed as "Not Rated." While details on the inspection frequency and emergency action plan are not provided, Apogee's purpose and design suggest a focus on providing essential water resources for both agricultural and wildlife needs in the region. With its location in a scenic area of Hill County, Montana, Apogee serves as a vital resource for the local community and contributes to the overall water management efforts in the region.
Despite its relatively modest size, Apogee plays a significant role in water management and conservation efforts in the area, providing essential services for fire protection, livestock watering, and recreational fishing. As a privately owned structure, it is subject to state regulations and inspections to ensure its safe operation and compliance with environmental standards. With its low hazard potential and strategic location along the Willow Coulee, Apogee stands as a testament to the importance of responsible water resource management in the face of changing climate conditions and increasing water demands.
Year Completed |
1965 |
Dam Length |
250 |
Dam Height |
30 |
River Or Stream |
WILLOW COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
124 |
Hazard Potential |
Low |
Nid Height |
30 |
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.
Apogee