Brooks #1 Reservoir Report
Nearby: Brooks Antelope Dam
Last Updated: December 6, 2025
Brooks #1, located in Cohagen, Montana, is a private dam primarily used for fire protection, stock, and small fish pond purposes.
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Summary
Completed in 1960, this earth dam stands at 20 feet tall and spans 700 feet in length, providing a storage capacity of 268 acre-feet. Situated on Horse Creek in Garfield County, this low hazard potential structure is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and falls under state jurisdiction for permitting, inspection, and enforcement.
Despite its age, Brooks #1 has not been rated for its condition and lacks data on its inspection frequency and emergency preparedness measures. The dam's owner, a private entity, is responsible for ensuring its safety and compliance with state regulations. With its location in a remote area and minimal associated structures, the dam serves a vital role in providing water resources for fire protection and livestock use in the region. As a key asset in this rural setting, ongoing monitoring and maintenance of Brooks #1 are essential to ensure its continued function and safety for the surrounding community.
In the event of any potential risks or emergencies, the lack of an Emergency Action Plan (EAP) and updated contact information raises concerns about the dam's preparedness and response capabilities. As climate change impacts water resources and weather patterns, it is crucial for dam owners and regulators to prioritize safety measures and risk assessments to mitigate any potential threats to infrastructure and public safety. By addressing these gaps in oversight and planning, Brooks #1 can continue to serve its essential functions while adapting to the changing environmental conditions affecting water resources in the region.
Year Completed |
1960 |
Dam Length |
700 |
Dam Height |
20 |
River Or Stream |
HORSE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
268 |
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.
Brooks #1