Stoneridge Reservoir Report

Last Updated: December 21, 2025

Stoneridge, also known as Lake Sans Souchi, is a private water resource located in Blanchard, Idaho.


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Summary

Managed by the Idaho Department of Water Resources (IDWR), this dam serves primarily for recreational purposes. Constructed in 1969, Stoneridge stands at a height of 28.4 feet with a hydraulic height of 19.9 feet, providing a storage capacity of 256 acre-feet and covering a surface area of 32.2 acres.

With Blanchard Creek and Fish Lake as its main sources, Stoneridge's spillway is of the controlled type with a width of 18 feet. The dam has a significant hazard potential and was last assessed to be in fair condition in 2018. While the risk assessment indicates a very high risk level, the dam is inspected every four years to ensure its safety. Despite its age, Stoneridge continues to be a popular spot for outdoor enthusiasts seeking water-based recreational activities in the scenic Bonner County region of Idaho.

Overall, Stoneridge stands as a testament to the importance of water resource management in the face of climate change. As water levels and precipitation patterns continue to fluctuate, the maintenance and upkeep of dams like Stoneridge are crucial in ensuring the safety and sustainability of our water resources for future generations.

Year Completed

1969

Dam Length

350

Dam Height

28.4

River Or Stream

BLANCHARD CREEK FISH LAKE

Surface Area

32.2

Hydraulic Height

19.9

Drainage Area

35

Nid Storage

256

Hazard Potential

Significant

Foundations

Rock, Soil

Nid Height

28
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.