Ehrhart's Mill Historic District

Along Old Mill Road beside Saucon Creek in Lower Saucon Township stands a cluster of nineteenth-century buildings centred on a limestone grist mill. The mill, rebuilt after a fire in 1865 under a gambrel roof, still holds three runs of mill stones, a 42-inch turbine that replaced an earlier water wheel around 1900, and most of its nineteenth-century milling machinery, which is rare among surviving local mills. The district also includes a mill house, a brick retirement house, a limestone farmhouse of about 1850, outbuildings, and an iron Pratt truss bridge completed in 1867. Its significance rests on that bridge, regarded as the earliest known iron Pratt truss bridge in Pennsylvania and a forerunner of a design later used widely across the state, and on the mill's unusually complete equipment. The houses, built by members of one family, are a locally notable mix of stone and brick construction.