Tyson North Reservoir Report
Nearby: Tyson West Macks Creek
Last Updated: December 14, 2025
Tyson North is a privately owned irrigation dam located in Owyhee, Idaho, along the Reynolds Creek and Snake River.
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Summary
Completed in 1967, this earth dam stands at a height of 27.3 meters with a hydraulic height of 24.8 meters, providing a storage capacity of 150 acre-feet for irrigation purposes. The dam covers a surface area of 38 acres and has a drainage area of 0.3 square kilometers.
Despite being classified as low hazard potential with fair condition assessment, Tyson North presents a moderate risk level, indicating the need for risk management measures. Inspected every five years, the dam's last assessment in July 2019 showed that it meets regulatory standards with state-permitting, inspection, and enforcement in place. With an uncontrolled spillway and a spillway width of 24 meters, Tyson North remains a vital structure for water resource management in the region.
As a key component in the water infrastructure of Idaho, Tyson North plays a crucial role in providing water for agricultural activities in the area. Its location within the Sacramento District and under state regulation by the Idaho Department of Water Resources underscores its significance in ensuring water availability for the surrounding communities. With its historical importance and operational efficiency, Tyson North stands as a testament to effective water resource management in the face of changing climate conditions.
Year Completed |
1967 |
Dam Length |
1170 |
Dam Height |
27.3 |
River Or Stream |
REYNOLDS CREEK SNAKE RIVER |
Surface Area |
38 |
Hydraulic Height |
24.8 |
Drainage Area |
0.3 |
Nid Storage |
150 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
27 |
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.
Tyson North