I-35W St Anthony Falls Anti-Icing Containment System Completion
SP 2783-217, Letting Jan 11, 2023
Project description
This project will take place entirely within the “boxes” of the St. Anthony Falls bridge (and, as it takes place within the bridge structures, all workers must have Confined Space Entry Training). Each of the 4 boxes has a PVC piping collection system running for approximately 1,500 feet from the middle to the ends of the bridge in the existing situation. These systems are designed to carry any liquid (primarily anti-icing chemical and water) that leaches into the boxes from the anti-icing holes in the deck from the high points in the middle of each box to one of two collection tanks located at either end of each structure utilizing a gravity only design. These systems are operational, but they leave pools of liquid in some areas, they are inefficient for MnDOT Maintenance to drain, and they may not be able to contain a catastrophic failure of an anti-icing feed line as designed. The systems in two of these boxes were surrounded with new PVC containment as part of SP 2783-174 in 2018 that was more reliable and efficient. The purpose of this project is to add similarly reliable and efficient containment in the other two boxes.
Procurement schedule
- RFP: October 17, 2022
- Letting: January 11, 2023
- Construction Start: April, 2023
Information
Oversight
- Internal