La Salle County Highway 9 is a norht-south highway in Central La Salle County. This highway connects the Earlville Area to Ottawa and La Salle-Peru. LSCH 9 passes through the following town in La Salle County. Prairie Center LSCH 9 is not multi-plexed in La Salle County. LSCH 9 crosses the following highways in La Salle County. U.S. Rt. 6, near Ottawa. Interstate 80, near Ottawa. (NO INTERCHANGE) La Salle County Highway 33, near Prairie Center. U.S. Rt. 52, at Prairie Center. La Salle County Highway 19, near Prairie Center. U.S. Rt. 34, near Earlville.