Start of construction: May 2005
Construction volume (value of our services): 349 M EUR
As the largest of all Portland’s projects to reduce overflows into the Willamette River, the East Side Combined Sewer Overflow tunnel is designed to significantly reduce sewage and storm water overflows. To reduce risk exposure on the project the JV was awarded during the pre-design phase with a “Phase 1 pre-construction contract”. Within a 9 month period the JV optimized the design in collaboration with the client and its designer.