One D-4 Ranch Reservoir Report
Nearby: Major #1 Two D-4 Ranch
Last Updated: December 5, 2025
One D-4 Ranch, located in Carter, Montana, is a privately owned irrigation dam situated along TR-Corral Creek.
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Summary
Completed in 1952, this earth dam stands at a height of 20 feet and has a storage capacity of 52 acre-feet, with a normal storage level of 26 acre-feet. The dam spans 300 feet in length and serves the primary purpose of irrigation.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), One D-4 Ranch is subject to state regulation, inspection, and enforcement to ensure its safety and compliance with water resource management guidelines. With a low hazard potential, the dam is currently rated as "Not Rated" in terms of its condition assessment, indicating a need for further evaluation.
As a key infrastructure for water resource management in the region, One D-4 Ranch plays a crucial role in supporting agricultural activities in the area. Enthusiasts of water resources and climate science will find interest in studying the history, design, and operational aspects of this irrigation dam to better understand its impact on the local ecosystem and water availability in Carter, Montana.
Year Completed |
1952 |
Dam Length |
300 |
Dam Height |
20 |
River Or Stream |
TR-CORRAL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
52 |
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.
One D-4 Ranch