Cockran Grazing #3 Reservoir Report
Last Updated: December 13, 2025
Cockran Grazing #3 is a privately-owned irrigation dam located in Carter, Montana, along the South Fork Willow Creek.
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Summary
Built in 1965, this earth dam stands at a height of 25 feet and has a storage capacity of 69 acre-feet. The primary purpose of this dam is irrigation, serving to support agricultural activities in the region.
Despite being classified as having a low hazard potential, Cockran Grazing #3 has not been rated for its condition assessment. The dam is under state jurisdiction and is regulated, inspected, and enforced by the Montana Department of Natural Resources and Conservation (DNRC). Although there is no information available on the dam's maintenance history or emergency action plan, its presence contributes to the water resource infrastructure in the area.
With its location in a rural setting and its importance for irrigation, Cockran Grazing #3 provides a vital resource for local water users. As part of the water management system in the region, this dam plays a key role in supporting agricultural production and ensuring water availability for the community. While more information is needed on its current condition and management practices, the dam remains a significant asset for water resource and climate enthusiasts interested in sustainable water use in Montana.
Year Completed |
1965 |
Dam Length |
75 |
Dam Height |
25 |
River Or Stream |
SOUTH FORK WILLOW CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
69 |
Hazard Potential |
Low |
Nid Height |
25 |
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 #3