Cinnamon #3 Reservoir Report
Nearby: Cinnamon #1 Cinnamon #4
Last Updated: December 5, 2025
Cinnamon #3 is a privately owned earth dam located in Wheatland County, Montana, specifically in the city of WINNECOOK.
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Summary
Built in 1976, the dam stands at a height of 20 feet with a length of 150 feet, providing storage for fire protection, stock, or a small fish pond. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Cinnamon #3 is state-regulated, permitted, inspected, and enforced for compliance. It serves as a crucial water resource structure for the TR-AMERICAN FORK CREEK watershed, with a normal storage capacity of 26 acre-feet and a maximum storage capacity of 51 acre-feet. Despite its age, the dam's condition assessment and emergency action plan are currently not rated or prepared, highlighting the need for further evaluation and risk management measures.
As an essential infrastructure for water management and conservation in the region, Cinnamon #3 plays a vital role in ensuring water availability for fire protection, livestock, and recreational purposes. With its location in a rural area and relatively low hazard potential, the dam serves as a valuable asset for the community while also requiring ongoing maintenance and monitoring to address any potential risks or deficiencies in its operation.
Year Completed |
1976 |
Dam Length |
150 |
Dam Height |
20 |
River Or Stream |
TR-AMERICAN FORK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
51 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Cinnamon #3