MnDOT says that the Highway 99 Bridge over the Minnesota River is schedule to close Wednesday, March 8th and stay that way until the $5.6-million project is completed in early October.
Traffic will be detoured to Highway 22 and Le Sueur County Road 21.
The project was initially slated to begin in early April, but MnDOT is allowing the contractor an early start to perform work over the river with current low water levels to prevent the establishment of migratory bird nests.
Built in 1931, this year’s rehabilitation of the steel truss bridge will address corrosion in the steel members and deterioration of concrete in the bearing support and parapet wall. The work will include:
- Strengthening of truss floorbeams
- New concrete bridge deck and sidewalk
- Abutment and pier rehabilitation
- Complete repainting (dark green)
- Rip-rap around pier abutments
- New lights
In related projects, the City of St. Peter will reconstruct Hwy 99/Broadway from Minnesota Ave to the Minnesota River Bridge with medians, signals and accessible sidewalks. In addition, the UP Railroad crossing of Highway 99 east of the Minnesota River Bridge will be upgraded.
The Highway 99 Bridge in St. Peter is on the National Register of Historic Places and is one of 24 bridges selected across the state of Minnesota for special preservation.
Some repairs and rehabilitation have taken place in the 1950’s, 1960’s and 1980’s and most recently in 2009 the east and west abutments were repaired and the gusset plates repaired and painted.
(Copyright © 2017 Southern Minnesota News – Alpha Media Mankato. All rights reserved.)
Photos via MnDOT.