Before Codorus State Park, there was Codorus Creek and the community of Marburg. The Commonwealth of Pennsylvania and the P.H. Glatfelter Paper Company collaborated in order to establish Lake Marburg as both a water source for Glatfelter and the people of Spring Grove and a recreational lake. Codorus Creek was dammed and Marburg was flooded December 6, 1966 and Lake Marburg was full three years later. Because the lake was created over top of Marburg, during droughts it is possible to see the roads leading into the old community. This photo shows some of the original structures that remain under the water.