Rowley Cb&O #1 Reservoir Report
Nearby: Ottun #9 Christensen L&C #2
Last Updated: December 5, 2025
Rowley Cb&O #1 is a privately owned earth dam in Hardin, Montana, completed in 1960 for fire protection, stock, and small fish pond purposes.
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Summary
With a height of 8 feet and a length of 275 feet, this dam has a storage capacity of 95 acre-feet and serves the TR-Williams Coulee river. It is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected and enforced by the state regularly.
Despite being categorized as having a low hazard potential and not rated for condition assessment, Rowley Cb&O #1 plays a crucial role in providing essential water resources for the surrounding area. It stands as a testament to the intersection of human ingenuity and environmental stewardship, demonstrating the importance of sustainable water management practices in the face of climate change and increasing water scarcity. Water resource and climate enthusiasts can appreciate the significance of this dam in maintaining water security and ecosystem health in Big Horn County, Montana.
As part of the broader water infrastructure network in the region, Rowley Cb&O #1 exemplifies the intricate relationship between human development and natural resources. Its presence not only supports local communities with vital water resources but also highlights the need for ongoing monitoring, maintenance, and risk assessment to ensure its continued effectiveness and safety. For those passionate about water resource management and climate resilience, Rowley Cb&O #1 serves as a focal point for understanding the complex dynamics of water infrastructure in a changing climate landscape.
Year Completed |
1960 |
Dam Length |
275 |
Dam Height |
8 |
River Or Stream |
TR-WILLIAMS COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
8 |
Nid Storage |
95 |
Hazard Potential |
Low |
Nid Height |
8 |
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.
Rowley Cb&O #1