PCI Energy Services needed to provide additional parking for their growing workforce. The only available land on the Green Oaks facility was in the floodplain. Bono Consulting was able to design a new parking lot that minimized floodplain fill by keeping around ½ of the new parking lot below the flood elevation with a maximum depth of ponding of 12” over the catch basins. The remainder of the compensatory storage was placed in the existing floodplain area by making it deeper. The site required permitting from Green Oaks, Lake County, and IEPA. After the work was constructed we prepared an as-built topo survey so that we could certify the final quantity of fill placed and the quantity of compensatory storage provided.