Ohs Reservoir Report
Nearby: Martin #1 (Phillips) Chanlin
Last Updated: January 12, 2026
Ohs, located in Saco, Montana, is a privately owned dam constructed in 1942 for fire protection, stock, and small fish pond purposes.
°F
°F
mph
Wind
%
Humidity
Summary
With a dam height of 14 feet and a length of 370 feet, it has a storage capacity of 111 acre-feet and a normal storage level of 33 acre-feet. The dam, primarily made of earth, is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected, permitted, and enforced by the state agency.
Situated on Beaver Creek in Phillips County, Ohs serves as a vital resource for water management in the area. The dam has a low hazard potential and has not been rated for its condition assessment yet. Although the dam does not fall under the jurisdiction of the US Army Corps of Engineers, it plays a significant role in providing water for fire protection and agricultural purposes in the region. The dam's emergency action plan (EAP) status and risk assessment measures are currently not available, highlighting the need for continued monitoring and maintenance of this essential water infrastructure.
As an important structure for water resource management in the region, Ohs contributes to the overall sustainability and resilience of the local ecosystem. With its historical significance dating back to 1942, the dam continues to play a crucial role in providing water for various purposes while ensuring low risk potential and adherence to state regulatory standards. Ohs stands as a testament to the importance of maintaining and managing water resources effectively in the face of climate change and increasing water demands.
Year Completed |
1942 |
Dam Length |
370 |
Dam Height |
14 |
River Or Stream |
BEAVER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Nid Storage |
111 |
Hazard Potential |
Low |
Nid Height |
14 |
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.
Ohs