Iowa State Route 146 is a north-south highway in Poweshiek County. This runs along the counties western boarder. IA St Rt 146 passes through the following towns in Poweshiek County. Grinnell
Searsboro IA St Rt 146 is not multi-plexed in Poweshiek County. IA St Rt 146 intersects the following highways in Poweshiek COunty. U.S. Rt. 6, at Grinnell.
Interstate 80, near Grinnell. Iowa State Route 225, near Searsboro.
SB IA St Rt 146 near Newburg. SB IA St Rt 146 at a UPRR underpass north of Grinnell. A guide marker on WB U.S. Rt. 6. BGS on EB I-80.
