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Washakie Dam Seepage Remediation

   
Details
Location:

USA

State:

Wyoming

Client:

Eastern Shoshone & Northern Arapaho Tribes

Highlights:


Project Overview

Safety modifications to the existing earthen dam. Major items of work include develop and implement phased stream diversion; foundation dewatering; internal seepage collection drain system; low-permeability blanket seepage barrier upstream; deep toe drain collector system; demolition of existing outlet works and installation of new conduit and stilling basin; replace outlet work control gates and operator with modifications to gate chamber and structure. Construction of new service spillway and footbridge; raising and leveling crest of main dam and three dikes; and new instrumentation

Technical Details:

Type of Dam: Earth-fill
Height: 82 feet; 25 m
Crest Length: 2,400 feet; 700 m
Conventional Concrete: 4,500 cy; 3,400 m3

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