Iowa State Route 70 runs north-south highway in Northwestern Louisa County. It runs from the Muscatine/Louisa County Line, near Port Allen, to Iowa State Route 92, at Columbus Junction. IA St Rt 70 passes through the following towns in Louisa County. Port Allen Columbus Junction
IA St Rt 70 is not multi-plexed in Louisa County. IA St Rt 70 intersects the followng highways in Louisa County. Iowa State Route 92, at Columbus Junction.
