The rail bridge installment and road improvements should be completed by the end of construction season.

Traffic woes are in store as construction begins on the west viaduct Monday.

The rail bridge that spans College Dr. near 6th St. is due for a replacement, and the somewhat complicated project entails replacing the current bridge, installing a temporary bridge and improving College Dr.

The College Dr. and 6th St. NE intersection will also see improvements, including new signals and other efforts to ease traffic flow during peak driving hours.

Extensive pile driving will be required, according to city engineer Mike Grafsgaard. That work is planned to take place between 7 a.m. and 10 p.m., though Grafsgaard said weeks ago at the April 17 City Commission meeting that those hours may need to be extended.

The underpass work is expected to eat up much of the money used for engineering projects this year, though Grafsgaard indicated that it’s a necessary infrastructure project for the city to undertake.

The rail bridge installment and road improvements should be completed by the end of construction season. The city is responsible for 10 percent of the estimated $16.7M cost.