Magco was the drilled shaft subcontractor for Hansel Phelps Construction on two separate contracts on the Terminal 4 Project at the Phoenix Sky Harbour Airport. In this very nicely written article, the numerous material, equipment, logistical and other challenges on the project are described, including fighting the sand, gravel and cobbles (known locally as the SGC) from the Salt River. Pockets of Boulders were also encountered along with relatively shallow groundwater. Perhaps one of the biggest challenges was drilling and constructing the shafts with limited space and overhead clearance. I should also acknowledge my colleagues at Gannett Fleming who were involved in geotechnical and structural design on the project. [Source: GeoDrilling International. Image: Hensel Phelps Construction]
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