Weaver Dam Reservoir Report
Nearby: Warren Weaver #1 Torger Dam
Last Updated: December 5, 2025
Located in Fergus County, Montana, Weaver Dam stands as a testament to the innovative work of the USDA NRCS in constructing a vital water resource for the surrounding community.
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Summary
Completed in 1966, this earth dam on Dovetail Creek serves multiple purposes, including fire protection, stock watering, and a small fish pond. With a height of 25 feet and a length of 250 feet, Weaver Dam has a storage capacity of 117 acre-feet, offering essential water security in this arid region.
Despite its low hazard potential, Weaver Dam plays a crucial role in mitigating the moderate risk of water scarcity in the area. With a maximum discharge of 600 cubic feet per second and an uncontrolled spillway width of 100 feet, the dam provides a reliable source of water for both human and ecological needs. DNRC oversees the state-regulated dam, ensuring proper inspection, permitting, and enforcement to uphold its structural integrity and safeguard the surrounding environment.
Weaver Dam's strategic location and efficient design highlight the importance of sustainable water management in the face of changing climate conditions. As water resource and climate enthusiasts, we can appreciate the critical role that infrastructure like Weaver Dam plays in supporting local ecosystems and communities, while also adapting to the evolving challenges posed by a shifting climate.
Year Completed |
1966 |
Dam Length |
250 |
Dam Height |
25 |
River Or Stream |
DOVETAIL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Drainage Area |
2.03 |
Nid Storage |
117 |
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.
Weaver Dam