I-41 Rehabilitation Projects

Waukesha and Washington County

I-41 Bridge Maintenance


WisDOT will be performing preventative maintenance to five structures along I-41 in Waukesha and Washington counties.


  • Pilgrim Road Structures over I-41 (Waukesha County)
  • The WIS 100 Southbound Entrance Ramp Structure over the Menomonee River (Waukesha County)
  • I-41 Structures over the Menomonee River (Washington County)

The treatment proposed is a Thin Polymer Overlay – thin polymer overlays are intended to seal the road surface of the bridge and prevent salt from leeching down into the steel reinforcement. A thin polymer overlay is a thin coat of polymer spread across the deck in two coats with aggregate applied between each coat for friction. They are typically applied within ten years of initial bridge construction. Thin polymer overlays will be applied overnight, and the process is expected to take between two to four nights at each location.

Traffic Impacts

All work will be completed during nighttime, off-peak hours. Some nighttime system ramp closures may be required. During construction, one lane of traffic will remain open on each structure over night with the exception of the WIS 100 Southbound Entrance Ramp, traffic will be detoured. During the day, the bridge will be open and traffic patterns will be as they were before construction.


Tentatively scheduled from mid-June to mid-July, 2020