1920 Army Engineers
2006 USGS Map shows Upper Pampatke running along causeway halfway. It currently runs the entire length.
The top of Piping Tree Creek is show as rerouted over to Pampatike Creek, but it travels along base of Shop Spring Hill instead of along the causeway as it does now.
Pampatike is shown in original location even though it now exits at a new location. (Same as Blackford)
2006 USGS Map