The `Down' of Top Down

by Michael S. Fletcher, (M.ASCE), Sr. Proj. Mgr.; Skidmore, Owings & Merrill,
Robert A. Halvorson, (M.ASCE), Partner; Skidmore, Owings & Merrill,
Alan B. Wagner, (M.ASCE), Regional Vice Pres.; STS Consultants, Ltd., Milwaukee, WI,

Serial Information: Civil Engineering—ASCE, 1988, Vol. 58, Issue 3, Pg. 58-61

Document Type: Feature article


The 800-space parking area for the Milwaukee Center was built in a four story deep basement of the building. In order to excavate the area without damaging two adjacent historic structures, the construction team decided to build a perimeter slurry wall. The slurry wall extends 80 to 130 ft below grade. After completion of the slurry wall and prior to extensive excavation, a dewatering program pumped water from five interior wells. As well as effectively controlling groundwater and acting as a stiff retention system, the perimeter slurry wall is a load bearing foundation element.

Subject Headings: Slurries | Slurry walls | Excavation | Team building | Parking facilities | Basements | Historic sites | Historic buildings | Wisconsin | United States

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