Cockran Grazing #4 Reservoir Report
Nearby: Wyotana Ranch #4 Wyotana Ranch #5
Last Updated: December 5, 2025
Cockran Grazing #4 is a privately owned water resource located in Carter, Montana, specifically in S30 9S 58E, near Capitol.
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Summary
This earth dam, completed in 1959, serves multiple purposes including fire protection, stock, and small fish pond maintenance. The dam stands at a height of 15 feet with a storage capacity of 68 acre-feet and a normal storage level of 7 acre-feet. It is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and undergoes regular inspections to ensure its structural integrity.
Situated along the TR-Thompson Creek, Cockran Grazing #4 plays a crucial role in water management in the area. With a low hazard potential and a condition assessment of "Not Rated," this dam contributes to the overall ecological balance and water availability in the region. Despite lacking certain details such as inspection frequency and emergency preparedness measures, the dam continues to fulfill its primary purposes effectively.
Water resource and climate enthusiasts will appreciate the historical significance and functional importance of Cockran Grazing #4. As a key component in the local water infrastructure, this earth dam not only aids in fire protection and livestock maintenance but also supports the biodiversity of the area. With its regulated status and consistent inspection practices, Cockran Grazing #4 stands as a reliable resource for water management in Carter County, Montana.
Year Completed |
1959 |
Dam Length |
800 |
Dam Height |
15 |
River Or Stream |
TR-THOMPSON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
68 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Cockran Grazing #4