1953 Map of Irwin

Transportation corridors define the layout, with the Pennsylvania Turnpike and Lincoln Highway cutting through established borough centers like Irwin, Manor, and Harrison City. Settlement patterns reflect a mix of town centers and smaller mining plan communities such as Herminie and Claridge. Genealogists will find significant value in the numerous burial grounds, including the Old Brush Creek Cem and the Old Quaker Cem (Historical), which document the area's earliest pioneer families and diverse immigrant labor force.