Hulet No 2 Dike Reservoir Report

Last Updated: December 24, 2025

Hulet No 2 Dike, also known as Sinker Creek Dike, is a privately owned structure located in Owyhee, Idaho.


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Summary

This earth dam was completed in 1987 for the primary purpose of irrigation, with a storage capacity of 2500 acre-feet and a surface area of 347 acres. The dam is situated on the Snake River and an unnamed stream, helping to provide water resources for agricultural activities in the area.

Despite its low hazard potential, Hulet No 2 Dike has been assessed to be in poor condition as of May 2018. The dam has a hydraulic height of 8 feet and a total height of 12.5 feet, built with stone core and foundations of rock and soil. While the dam lacks a spillway, it serves its intended purpose of irrigation for the surrounding area. The risk assessment for this structure is considered high, highlighting the importance of regular inspections and maintenance to ensure its continued functionality.

The location of Hulet No 2 Dike in an area vulnerable to climate change impacts underscores the significance of water resource management and infrastructure resilience. As a state-regulated and inspected dam, it plays a vital role in supporting agricultural activities in Idaho. Continued monitoring and potential upgrades will be crucial for maintaining the safety and effectiveness of this essential water resource infrastructure in the face of evolving environmental challenges.

Year Completed

1987

Dam Length

1140

Dam Height

12.5

River Or Stream

SNAKE RIVER UNAMED STREAM

Surface Area

347

Hydraulic Height

8

Drainage Area

16

Nid Storage

2500

Outlet Gates

None

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

13
       
Seasonal Comparison

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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.