2012 Top 10 Roads - No. 6

MITCHELL INTERCHANGE RECONSTRUCTION

Nov. 5, 2012

PROJECT: Mitchell Interchange Reconstruction

LOCATION: Milwaukee County, Wis.

COST: $400 million

DESIGNERS: CH2M Hill/HNTB Joint Venture

CONTRACTOR: Lunda Construction

OWNER: Wisconsin DOT

A cut below proved to be a cut above. The Mitchell Interchange includes cut-and-cover tunnels designed for the I-43 north and I-94 to I-894 movements. The tunnels reduced cost by allowing roadways to traverse over these movements without the use of seven highly skewed bridges. Milwaukee Transportation Partners designed secant drilled shafts for the tunnel walls. The Layton Avenue Bridge was rebuilt within six months.