As part of its ever-expanding footprint, Amazon proposed the development and construction of a five-story, 823,000 sq-ft warehouse in Wilmington, DE. The proposed location, which once served as a General Motors Assembly Plant, is at 1025 Boxwood Road in Wilmington, which is two miles from the I-95 corridor. The new facility would be the third such Amazon fulfillment center in Delaware. Small items such as books, electronics, household goods and toys would be shipped from the location. Amazon planned to hire upwards of 1,000 employees upon completion of the structure.
Due to the variability in soil stiffness/type over the warehouse footprint, ground improvement was required to prevent differential settlement and improve bearing capacity for the foundations. To further identify the soil properties at each footing location and design a unique ground improvement solution that fit the loading condition and soil profile, Menard proposed an additional investigation that included a series of Cone Penetrometer Tests (CPT). Controlled Modulus Column (CMC)® rigid inclusions were ultimately selected to support the new warehouse.