Freeport Regional Water Authority Intake Facilities Project Earns ASCE Award
Source: 
CH2M HILL

Project awarded as Geotechnical Project of the Year

CH2M HILL announced that the Freeport Regional Water Authority Intake Facilities Project in Sacramento, Calif., won the American Society of Civil Engineers (ASCE) California Region’s Geotechnical Project of the Year award. The Freeport Regional Water Authority is a Joint Powers Authority of the East Bay Municipal Utility District (EBMUD) and the Sacramento County Water Agency (SCWA). CH2M HILL provided planning studies and analysis for the project and final design services for the Sacramento River Intake and Pump Station facilities.

The ASCE awards program recognizes the commendable achievements and remarkable accomplishments of the civil engineering profession. All of the Region 9 project and people awards were presented at the ASCE Region 9 Fifth Annual California 2011 Infrastructure Symposium and Awards Dinner, held March 9 at the Hyatt Regency in Sacramento.

The Freeport Regional Water Authority Intake Facilities Project is a $121 million regional raw water supply project on the Sacramento River with 185-million-gal-per-day total design capacity, serving both EBMUD and SCWA. The project includes diverting water from the Sacramento River at Freeport Bend and pumping it to the SCWA and EBMUD delivery points via an 18-mile transmission pipeline system. The intake includes state-of-the-art vertical plate fish screens meeting all National Oceanic and Atmospheric Administration Fisheries and California Department of Fish and Game requirements. A first-of-its-kind sediment management system was included in the pump station forebay/wetwell chambers to provide important operational advantages.

Key geotechnical aspects of the intake structure, pump station, pipeline and ancillary structures include in-river development of a cofferdam and drilled pier foundation consisting of more than 200 36-in. cased piers, construction of a 80-ft-deep levee cutoff slurry wall, installation of anchored sheetpile bulkhead training walls and completion of two 102-in. microtunnel crossings of Interstate 5, Freeport Boulevard, railroad tracks and a canal. Design of these elements was completed by CH2M HILL’s in-house geotechnical engineers with data collection services provided by AGS Inc. of Oakland, Calif.

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