Lying 6.2 miles east, southeast of Port Sanilac, Michigan is the wreck of the Mary Alice B. The beautiful 65 foot-long tug boat was built for the U.S. Army Corp of Engineers by the Marine Iron & Ship Building Co. in Duluth, MN. The tug began her career in Buffalo, New York under the name Quintus. In 1951 she was transferred to the Detroit District.

It was sold to a Detroit towing company in 1962 and renamed the Bonanka. She was again sold in the mid 60's to a Marine City tug company and used for salvage mainly in lower Lake Huron and the St. Clair River. In 1972 the Bonanka was sold, renamed the Lomax and worked the next three years in Cleveland, Ohio, before being sold yet again in 1975. Renamed the Mary Alice B. she was moved back to Detroit.

After salvaging the saltwater freighter Monrovia in Thunder Bay, the Mary Alice B. was being towed back to Detroit where she began to take on water. The crew was rescued but the tug met her final resting place near Port Sanilac where she was lost until found July 8, 1992 by Jim and Pay Stayer.

This is a really nice little wreck. She sits in about 92 feet of water. Visibility can be low here with typical Great Lakes temperatures in the low to mid forties up to the low 50's depending on the time of year. The Mary Alice B. is very intact with the ship's wheel being a highlight of the dive.