The North Lavergne Av. project was designed to alleviate sewer backups and reduce local surface flooding. It requires the construction of 2,500 ft. of 78 in. diameter RCP via pipe jacking, 4 ea. rib & lag shafts and a 232 ft. deep drop shaft that that connects to an existing 13 ft. 9 in. tunnel. The drop shaft will be excavated by drilling & blasting. The most challenging aspect of construction will be the live connection work from the drop shaft to the existing 13 ft. 9 in tunnel and working within Chicago city limits and the minimal right of way given to construct the project.
