The Northern Pacific Railroad Bridge No. 9 was constructed in 1922, and was largely used to carry freight over the Mississippi River. In 1986, the bridge was acquired by the City of Minneapolis and has since been converted into a pedestrian bridge. Bridge 9 connects the University of Minnesota’s East and West Bank Campuses. Steam and condensate are routed beneath the bridge from the Main Energy Plant on the East Bank Campus to service the West Bank campus buildings.

The City of Minneapolis began a large scale, multi-phased maintenance project in 2012 which is expected to be completed in 2026. The city is conducting critical rehabilitation on Pier’s No. 6 & 7 this month. Prior to this project, Loeffler began work on a two-phase relocation and replacement of the steam and condensate lines for the University.

In May, mobilization began, and a temporary steel bridge was erected to support the temporary steam and condensate pipes. Through the month of June, the new piping was installed and inspections were carried out. Last week the LCC team wrapped up on the demolition of the existing pipe support system, which completed Phase 1. Phase 2 will begin once the pier rehabilitation is complete, and will install a permanent catwalk and complete all tie-ins.

Despite some procurement delay’s due to the COVID-19 pandemic, this project was completed seamlessly and on-schedule. We look forward to starting Phase 2!