Summit Reservoir Report
Nearby: Magic Spillway Magic Dam
Last Updated: December 19, 2025
Summit, located in Camas County, Idaho, is a federally owned dam that is regulated by the Idaho Department of Water Resources.
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Summary
Completed in 1941, this Earth dam stands at a height of 13.2 meters and serves a variety of purposes, including providing storage of 99 acre-feet of water from an unnamed stream that sinks nearby. The dam has a low hazard potential and is currently in fair condition, with regular inspections conducted every five years to ensure its safety and effectiveness.
Managed by the Sacramento District of the US Army Corps of Engineers, Summit has a spillway width of 45 meters and a maximum discharge capacity of 60 cubic meters per second. The dam's primary purpose is classified as "Other," and it is primarily constructed of Stone core types with rock and soil foundations. Despite its moderate risk assessment rating of 3, the dam has not required significant risk management measures or emergency action planning, indicating a generally stable and well-maintained structure that contributes to the local water resource management and climate resilience efforts in the region.
With its strategic location in Shoshone and its crucial role in water storage and flood control for the surrounding area, Summit represents a key piece of infrastructure in Idaho's water resource management system. As climate change continues to impact water availability and extreme weather events become more frequent, the maintenance and monitoring of dams like Summit will be essential in ensuring the resilience and sustainability of water resources in the face of a changing climate landscape.
Year Completed |
1941 |
Dam Length |
215 |
Dam Height |
13.2 |
River Or Stream |
UNNAMED STREAM SINKS |
Primary Dam Type |
Earth |
Surface Area |
49 |
Hydraulic Height |
10.6 |
Drainage Area |
1.4 |
Nid Storage |
99 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
13 |
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.
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