The SRC was first requested to work in this park in 1979 but wasn’t able to focus any field operations there until the late 1980s and early 1990s. At this time, efforts were being made by Jed Jaworski of the Northwest Michigan Maritime Museum and Ken Vrana of Sea Grant to complete an assessment of submerged cultural resources. Results of the research conducted by SRC during this time were incorporated into a comprehensive report on the Preserve authored by these individuals.

• August 1991 – Investigation of Grace Harbor docks and lakeshore shipwreck sites. Glenhaven dock mapped by Jim Bradford (SRC) and Shannon Barras from HABS/HAER. Daniel Lenihan, Project Director for the first half and Larry Murphy after Lenihan departed for the second half.

• September 1990 – Sleeping Bear Dunes National Lakeshore and Michigan Manitou Underwater Preserve. Instruct volunteers in use of magnetometer survey. Documentation of six preserve shipwrecks, Larry Murphy, Project Director.

• September 1988 — SRC archeologist Toni Carrell visited the park and worked with staff and representatives of Northwest Michigan Maritime Museum and Sea Grant to document a submerged schooner and to plan future research in the park.

Reference:
• Vrana, Kenneth J. (editor), 1995, Inventory of Maritime and Recreation Resources of the Manitou Passage Underwater Preserve. Center for Maritime and Underwater Resource Management, Dept. of Park, Recreation and Tourism Services, Michigan State University, East Lansing.