13N 11W - Survey Map of Big Prairie Township, Newaygo County

A survey map of Big Prairie Township in Newaygo County, Michigan, measured in 1837.

The back of a survey map of Big Prairie Township in Newaygo County, Michigan, detailing meander measurements.

A survey map detailing islands in the Muskegon River that runs through Sections 12, 13, 21, 22, 23, and 24 of Big Prairie Township in Newaygo County, Michigan. The islands were measured in 1856.