You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Houghton Lake Wildlife Research Area (Porter Ranch) ca. 6 km. SW of Houghton Lake. Near P-60 and P-61 on study site. Remove constraint Place: Houghton Lake Wildlife Research Area (Porter Ranch) ca. 6 km. SW of Houghton Lake. Near P-60 and P-61 on study site.