Warren Weaver #1 Reservoir Report
Nearby: Weaver Dam Torger Dam
Last Updated: December 5, 2025
Warren Weaver #1 is a private water resource structure located in Fergus County, Montana, specifically on the TR-Dovetail Creek.
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Summary
Built in 1964 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock, and small fish pond management. With a dam height of 18 feet and a storage capacity of 59 acre-feet, Warren Weaver #1 plays a crucial role in water management in the area.
Although the dam has a low hazard potential and is currently in a not rated condition, it is regulated and inspected by the Montana Department of Natural Resources Conservation (DNRC) to ensure its safety and functionality. The spillway, with a width of 30 feet, is uncontrolled and can handle a maximum discharge of 650 cubic feet per second. With a drainage area of 0.78 square miles and a moderate risk assessment rating of 3, Warren Weaver #1 is an important asset for water resource and climate enthusiasts to monitor and study in the context of sustainable water management in Montana.
As a water resource and climate enthusiast, tracking the developments and condition of Warren Weaver #1 is vital for understanding its impact on the local ecosystem and community. With its multiple purposes and regulated status, this earth dam on TR-Dovetail Creek serves as a key infrastructure for fire protection, stock watering, and fish pond management in the region. By staying informed about its maintenance and risk assessment, enthusiasts can contribute to the effective management and conservation of water resources in Fergus County, Montana.
Year Completed |
1964 |
Dam Length |
405 |
Dam Height |
18 |
River Or Stream |
TR-DOVETAIL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Drainage Area |
0.78 |
Nid Storage |
59 |
Hazard Potential |
Low |
Nid Height |
18 |
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.
Warren Weaver #1