Schnabel designed and installed a combination of SOE systems: soldier piles, lagging, tiebacks, braces, underpinning, single auger soil-mixed (SASM) walls, micropiles, and a tiedback slurry wall. For the Holy Rosary Church (HRC), a stiff SASM wall combined with underpinning and multiple tiers of tiebacks minimized settlement risks. For the Bell Tower, hand-dug underpinning piers and tiebacks were originally planned, but uncontrollable groundwater required Schnabel to adapt by installing a SASM wall to reinforce the design. Tiebacks were locked at 100% of design load to further control deflections, and walls were stiffened in the upper 17 feet near sensitive structures. An extensive real-time monitoring system (prisms, inclinometers, tilt sensors) tracked building and wall movements in three dimensions.