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1907 Map of Pittsburgh

Name: 1907 Topographic Map of Pittsburgh
Creator: U.S. Geological Survey
Published: 1946
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1946

About this map

The confluence of the Ohio River, Allegheny River, and Monongahela River forms the industrial and geographic heart of this early 20th-century landscape. The map reveals the intense density of the steel industry and rail infrastructure at its peak, with the Pennsylvania RR and several specialized lines like the Union RR serving the heavy works in Braddock, Homestead, and Duquesne. Beyond the urban core of Pittsburgh, the terrain transitions into the steep hills of Mifflin and Jefferson, where the settlement pattern follows narrow creek valleys such as Peters Creek and Lick Run.

Social and civic life is anchored by significant green spaces and landmarks, including the extensive Highland Park and the prominent Homewood Cem. The presence of Lock No 3 and numerous bridges like the Belle Bridge across the Monongahela underscore the vital importance of the river systems for both regional transportation and the transport of coal and raw materials. Smaller hubs like Unity Station and North Bessemer highlight the suburban and industrial expansion moving eastward toward the Westmoreland Co border.