4024 S. Grove Rd., Spokane, WA 99224 • (509) 838-4455 • Fax (509) 838-4464

Round Butte Selective Withdrawl

ROUND BUTTE – PORTLAND GENERAL ELECTRICAL

Dix was awarded a contract for the Round Butte Selective Withdrawal project by Portland General Electric for the installation of five primary structures. Dix was awarded a contract for the Round Butte Selective Withdrawal project by Portland General Electric for the installation of five primary structures.  These consisted of a 500-ton bottom structure that will be placed on the bottom of the lake 270 feet below the water surface, a 1500-ton floating top structure, built using large land and water based cranes and overland heavy haul equipment. A 40’ diameter 160’ long vertical conduit that the top structure rides on and a fish transfer facility and access structure.  As the lake level varies 20’ in elevation during the year the top structure is designed to move up and down on the conduit section.

This project won an award for project excellence in the sub-contractor category at the 2009 Build Northwest Awards sponsored by the Inland Northwest Associated General Contractors of America.