Shoofly Reservoir Report
Nearby: Bybee Big Blue Creek
Last Updated: December 24, 2025
Shoofly is a privately owned irrigation dam located in Owyhee, Idaho.
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Summary
Built in 1977, this earth dam stands at a height of 46 feet and has a storage capacity of 1100 acre-feet. The dam, situated on the West Fork Shoofly Creek, serves the primary purpose of irrigation and covers a surface area of 85 acres with a drainage area of 9 square miles.
Despite being classified as having a low hazard potential and fair condition, Shoofly undergoes regular inspections every five years to ensure its safety and functionality. The dam features an uncontrolled spillway with a width of 15 feet and can discharge a maximum of 400 cubic feet per second. Managed by the Idaho Department of Water Resources, Shoofly plays a crucial role in supporting agricultural activities in the region and contributes to water resource management efforts in Idaho.
For water resource and climate enthusiasts, Shoofly serves as a noteworthy example of a vital infrastructure project that facilitates irrigation and water storage in a rural setting. Its design and construction highlight the importance of maintaining dams for agricultural purposes while ensuring compliance with state regulations and safety standards. As climate change continues to impact water resources, structures like Shoofly play a crucial role in sustaining agricultural productivity and addressing water management challenges in Idaho.
Year Completed |
1977 |
Dam Length |
400 |
Dam Height |
46 |
River Or Stream |
WEST FORK SHOOFLY CREEK SHOOFLY CREEK |
Surface Area |
85 |
Hydraulic Height |
39.3 |
Drainage Area |
9 |
Nid Storage |
1100 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
46 |
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.
Shoofly
Yatahoney Creek