Missouri State Route 47 is a north-south highway in Northeastern Washington County. It runs from the Franklin/Washington County Line, near Richwoods, to the Washington/St. Francois County Line, near Cadet. MO St Rt 47 passes through the following towns in Washington County. Richwoods Old Mines
Cadet MO St Rt 47 is multi-plexed in Washington County. Missouri State Route 21, near Old Mines.