REMPREX provided design and construction management for support tracks at BNSFs Willow Springs Intermodal Facility. Following a winter of high volume, BNSF was adding surge capacity to its intermodal facilities in Chicagoland. BNSF brought RES in for the support track project to add capacity, given RES’ performance on other projects. Average train length had grown since the construction of the existing support track, and there was the need for a second support track to add surge capacity for trains arriving and departing the facility. RES worked with BNSF to refine the concept, yielding a design that was optimal for BNSF for civil and track design and future operations. Existing conditions were far from ideal, and BNSF requested the project be expedited. Since land acquisitions and Army Corp of Engineers permitting were deemed infeasible due to their timelines, the design was honed to work without either, significantly reducing the project timeline. Minimal retaining walls were used to stay on existing ROW and careful track design kept all new embankment out of wetland areas.