Local company helping Hutch grow

A Federal Way contractor has an integral role in the expansion of the Fred Hutchinson Cancer Research Center in Seattle.

Donald B. Murphy Contractors Inc. (DBM) recently completed the excavation support for the project. The site for the new Public Health Sciences Building is a full city block adjacent to the existing center. When finished this winter, the five story structure will include 360,000 square feet of offices and research labs, plus three levels of underground parking.

DBMÂ’s shoring for the 48-inch excavation was under contract with Turner Construction Co. The $2.3 million deal included installing 300 piles, more than 500 permanent and temporary tieback anchors, and approximately 34,000 square feet of timber.

The shoring system is designed to accommodate construction of a future expansion, DBM officials said. The system also includes a secant pile cutoff wall 475 feet along the Lake Union side of the project. The wall required 99 structurally reinforced piles and 98 concrete infill piles. All the piles are 36 inches in diameter.

DBM also installed 32 five-foot-diameter drilled shafts (averaging 55 feet deep) to provide foundation support for the new building.

Work was complicated by remains of foundations from previous structures, contaminated materials and areas of glass backfill from previous construction activities, DBM officials said.

Also involved in the project were CTI, Inc. (excavation contractor), Zimmer Gunsal Frasca Partnership (architect), KPFF Consulting Engineers (civil engineers) and URS Corp. (geotechnical engineer).

DBM ( is part of five other current projects in three states. they include a Safeway store in the Greenwood area of Seattle, the Hanford River Protection Project in Richland, a state highway in Utah and Carnegie Library in Alameda, Calif.

Founded in 1949, DBM Contractors specializes in geotechnical construction, design/build heavy civil construction, and specialized steel erection (dockside cranes and heavy lifting/rigging). DBM/CM is based in Federal Way, has a branch office in Gold River, Calif., and takes on projects throughout the western U.S., including Hawaii and Alaska.

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