You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place 0.61 air mi NNW of jct of Wickline & Walker Ridge Rds, side valley of Hay Hollow, SE 1/4 Sec 30, Jackson Township. Remove constraint Place: 0.61 air mi NNW of jct of Wickline & Walker Ridge Rds, side valley of Hay Hollow, SE 1/4 Sec 30, Jackson Township.