1400 N. 27th Road
PO Box 128
Ottawa, IL 61350
Phone: (815) 434-0743
Fax: (815) 434-0747
For full information regarding the LaSalle County Highway Department, please click here.
The LaSalle County Highway Department is responsible for the planning, design, construction, and maintenance of 371 miles of county highways, 79 major bridges and numerous drainage structures. In addition, the Highway Department provides technical assistance to all 37 Township Highway Commissioners and is the lead agency for township projects constructed or maintained with Motor Fuel Tax funding.
The staff also works closely with local citizens and agencies, as well as with the Federal Highway Administration, the Illinois Department of Transportation, and the various municipalities throughout the county.