Maine State Route 138 runs north-south in Northern Sagadahoc County. It goes from the U.S. Rt. 201, near Bo. ME St Rt 138 passes through the following towns in Sagadahoc County. Richmond Corner ME St Rt 138 is multi-plexed in Sagadahoc County. Maine State Route 125, near Bowdoinham. ME St Rt 138 intersects the following highways in Sagadahoc County. U.S. Rt. 201, near Bowdoin Center. Maine State Route 125, near Bowdoinham. Interstate 295, near Bowdoinham. Maine State Route 125, near Bowdoinham. Maine State Route 24, at Bowdoinham. Interstate 295, near Bowdoinham. (NO Interchange) U.S. Rt. 201, at Richmond Corner. Maine State Route 197, at Richmond Corner.
