BT Construction contracted with Schnabel to install 84 individual secant shafts, which involved 2,892 vertical feet (VF) of drilling using a Bauer BG28. The project featured two receiving shafts, each with a 20-foot diameter and varying excavation depths: one shaft reached 33 feet deep, while the other extended to 28 feet. The third shaft was a 33-foot diameter launch shaft, with an excavation depth of 28 feet.