Louisa Creek

Louisa Creek is a dam located in Owyhee County, Idaho, built in 1931. It carries a Low hazard potential classification and has a poor condition assessment.

About Louisa Creek

Louisa Creek is a dam in Owyhee, Idaho. The dam is private-owned. It impounds the Louisa Creek Rock Creek.

The dam stands 41 feet tall and stretches 40 feet across, creates a reservoir covering 9 acres, has a storage capacity of 175 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1931, the structure is well-established, with more than 75 years of service.

This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/05/2019.

At 41 feet, this dam is taller than 88% of dams nationwide.

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Low HazardPoor ConditionEmergency Action Plan: Not Required

Location

StateIdaho
CountyOwyhee
River/StreamLouisa Creek Rock Creek
Coordinates42.75970, -116.61640

Physical Characteristics

NID Height41 ft
Dam Height41 ft
Dam Length40 ft
Year Completed1931 (95 years old)

Storage & Hydraulics

NID Storage175 acre-ft
Normal Storage175 acre-ft
Surface Area9 acres
Drainage Area8 sq mi
Max Discharge30 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeOther
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentPoor
Last Inspection06/05/2019
Emergency Action PlanNot Required

Identifiers

NID IDID00095
Federal IDID00095
More InfoState Dam Safety Program

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