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Diversion Tunnel at Cougar Dam

   
Details
Location:

USA

State:

Oregon

Client:

U.S. Army Corps of Engineers

Highlights:

Live wet lake tap designed and executed by ASI
Drill and blast enlargement of existing tunnel

Project Overview

Project includes a live, wet lake tap; drill and blast enlargement of existing tunnel with conventional blasting in close proximity to dam, power plant and outlet works; removal of underwater bulkhead and replacement with new bulkhead; placement of liner concrete; and installation of four new high-pressure, bonneted slide gates
underground tunnel lining and gate chamber concrete structure.

Technical Details:

Type of Dam: Rock-fill
Height: 405 feet; 125 m
Crest Length: 1,650 feet; 500 m
RCC Volume:N/A Conventional
Concrete: 8,000 CY; 6,100 m3

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