Pioneer Reservoir Report
Nearby: Bliss Walker Dike
Last Updated: December 19, 2025
Pioneer is a privately owned irrigation structure located in King Hill, Idaho, on Clover Creek and the Snake River.
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Summary
Built in 1910 by AandE and USDA NRCS, this earth dam stands at a height of 14.6 feet and has a hydraulic height of 8.6 feet, serving its primary purpose of irrigation. With a normal storage capacity of 844 acre-feet and a surface area of 220 acres, Pioneer plays a crucial role in water resource management in the region.
Managed by the Idaho Department of Water Resources, Pioneer is regulated, inspected, and enforced to ensure its safety and functionality. The dam has a spillway type of Controlled with a width of 203 feet and a maximum discharge capacity of 3080 cfs. Despite being assessed as in fair condition during its last inspection in April 2018, Pioneer has a significant hazard potential due to its location and capacity, necessitating regular monitoring and risk assessment to prevent potential disasters.
As a key component of the irrigation infrastructure in Gooding County, Idaho, Pioneer serves as a vital resource for water supply and agricultural activities in the region. With its historical significance dating back over a century, this earth dam continues to play a crucial role in water management and climate resilience efforts, highlighting the importance of maintaining and monitoring such structures for sustainable water resource management in the face of changing climate conditions.
Year Completed |
1910 |
Dam Length |
2520 |
Dam Height |
14.6 |
River Or Stream |
CLOVER CREEK SNAKE RIVER |
Surface Area |
220 |
Hydraulic Height |
8.6 |
Drainage Area |
162 |
Nid Storage |
844 |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
15 |
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.
Pioneer
Snake River