 It was later extended westward to Harvey in 1939.In 1941, the portion of M-94 west from Munising to Harvey was made a part of M-28, and M-94 was extended along its current routing from Munising to US 41.M-94 was extended for the last time in 1998 over US 41 and through the old K. I. Sawyer Air Force Base to end at a newly designated M-553.