Monarch #3 Reservoir Report
Nearby: Whitetail (Custer) Hook #2
Last Updated: December 6, 2025
Monarch #3, located in Miles City, Montana, is a privately owned earth dam completed in 1953 with a primary purpose of providing fire protection, stock, or a small fish pond.
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Summary
The dam has a height of 24 feet and a storage capacity of 61 acre-feet for TR-Whitetail Creek. It is regulated and inspected by the Montana Department of Natural Resources and Conservation (DNRC), with low hazard potential and a current condition assessment of "Not Rated."
This structure has not been modified over the years and does not have an Emergency Action Plan (EAP) in place. The dam is not owned or funded by any federal agencies, and its operation, construction, and regulation are handled at the state level. Despite lacking certain risk management measures and documentation, Monarch #3 serves as a vital resource for water management and fire protection in the region.
For water resource and climate enthusiasts, Monarch #3 presents an interesting case study of a privately owned dam in Montana that plays a crucial role in providing essential services to the community. Its location, design, and purpose highlight the intersection of water management, emergency preparedness, and regulatory oversight in ensuring the safety and sustainability of our water resources in the face of changing climate conditions.
Year Completed |
1953 |
Dam Length |
250 |
Dam Height |
24 |
River Or Stream |
TR-WHITETAIL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
24 |
Nid Storage |
61 |
Hazard Potential |
Low |
Nid Height |
24 |
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.
Monarch #3