Stoyanoff Reservoir Report
Nearby: Robin Hood #2 Robin Hood #1
Last Updated: December 5, 2025
Stoyanoff is a private irrigation dam located in Meagher, Montana, along the Benton Gulch river.
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Summary
Built in 1947 by the USDA NRCS, this earth dam stands at a height of 50 feet and stretches 400 feet in length. With a storage capacity of 575 acre-feet and a drainage area of 24.81 square miles, Stoyanoff serves as a vital resource for water management in the region.
Despite its age, Stoyanoff has a low hazard potential and has not been rated for its condition assessment. The dam is regulated by the DNRC and undergoes regular inspections, with the last one conducted in 1993. With a spillway width of 30 feet and a maximum discharge of 320 cubic feet per second, Stoyanoff is equipped to handle potential flood events and ensure the safety of surrounding communities.
While Stoyanoff's emergency action plan and risk assessment details are currently unavailable, its presence as a key irrigation structure in the area highlights the importance of sustainable water resource management in the face of changing climate conditions. As a significant feature in the landscape of Meagher, Montana, Stoyanoff represents a blend of historical infrastructure and modern conservation efforts to secure water availability for agricultural purposes.
Year Completed |
1947 |
Dam Length |
400 |
Dam Height |
50 |
River Or Stream |
BENTON GULCH |
Primary Dam Type |
Earth |
Hydraulic Height |
50 |
Drainage Area |
24.81 |
Nid Storage |
575 |
Hazard Potential |
Low |
Nid Height |
50 |
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.
Stoyanoff
Camp Baker to Eden Bridge