The following Timeline is a draft. The information in it is derived from Halma and Oplinger’s The Lehigh Valley : A Natural and Environmental History (especially Chapter 3) and Wikipedia’s Allentown page (which is pretty good, but far from perfect). This was created by student’s in Drs. Carter and Heiman’s Human Impacts on Local Ecology course during the Fall of 2021. It is intended to give students an overall perspective on the history of the Lehigh Valley and, more specifically, Allentown.