Shirley Basin Reservoir

Shirley Basin Reservoir is a gravity dam located in Carbon County, Wyoming, built in 1941. It carries a Low hazard potential classification.

About Shirley Basin Reservoir

The primary purpose of Shirley Basin Reservoir is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Doi Blm (federal). It impounds the Tributary To Muddy Creek.

The dam stands 25 feet tall and stretches 714 feet across, creates a reservoir covering 27 acres, has a maximum storage capacity of 70 acre-feet, and collects water from a drainage area of 1,706 square miles. Completed in 1941, 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. The most recent inspection on record was 09/21/2015. That was over 10 years ago.

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Low HazardNot Rated ConditionEmergency Action Plan: Not Required

Location

StateWyoming
CountyCarbon
River/StreamTributary To Muddy Creek
Coordinates42.24025, -106.37069

Physical Characteristics

Dam TypeGravity
NID Height25 ft
Dam Length714 ft
Year Completed1941 (85 years old)

Storage & Hydraulics

NID Storage70 acre-ft
Max Storage70 acre-ft
Surface Area27 acres
Drainage Area1,706 sq mi

Ownership & Safety

PurposeFlood Risk Reduction
OwnerDOI BLM
Owner TypeFederal
Hazard ClassificationLow
Condition AssessmentNot Rated
Last Inspection09/21/2015
Emergency Action PlanNot Required

Identifiers

NID IDWY01476
Federal IDWY01476
More InfoState Dam Safety Program

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