GHA's services included a detailed existing condition drainage and flood study, historical research on flooding within the surrounding area, grading and drainage improvements over a majority of the grounds, design of a new parking lot, design of a new exterior tri-plex stormwater lift station, and a total of 385 linear feet of new 3’x6’ concrete box culvert to replace deteriorated corrugated metal pipe.  Construction phase services included survey layout, construction observation, and owner’s representation.

Reconstructing the Skokie Ditch proved to be extremely challenging as the Ditch passes through the school grounds within underground sewer in a confined area.  In addition, the sewer passes through a tunnel located in the crawl space of a 1949 school addition.  The existing corrugated metal pipe was found to be severely deteriorated and partially collapsed.  Most challenging was meeting the School’s tight construction schedule.  All of the work had to be completed during summer recess.