N. Lavergne Av. – W. Lawrence Av. to W. Montrose Av.

Project Overview

Designed to alleviate sewer backups and reduce surface flooding, this project involved 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 connected to an existing 13 ft. 9 in. tunnel. The drop shaft was excavated by drilling & blasting. Key challenges included live connection work from the drop shaft to the existing 13 ft. 9 tunnel, and working within Chicago city limits and the minimal right-of-way given to construct the project.

N. Lavergne Av. – W. Lawrence Av. to W. Montrose Av.

Project Stats

Project Owner

City of Chicago Department of Water Management

Services

TBM Tunnel Excavation
Shaft Excavation
Structure Construction

Markets

Sanitation & Wastewater

Location

Chicago, IL

Completion Year

2016

Project Value

$20.4 million

Project Size

2,500 ft of 78 inch RCP in sanitary tunnel
1 cast in place drop shaft 230 ft deep
1 live connection to existing 13 ft 9 CSO tunnel

Contract Type

Design-Bid-Build