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2016 Map of Irwin

Name: 2016 Topographic Map of Irwin
Creator: U.S. Geological Survey
Published: 2016
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2016

About this map

Brush Creek and its many tributaries, including Bushy Run and Byers Run, carve through this densely settled portion of Westmoreland County. The landscape is defined by a tight network of historic communities like Irwin, North Irwin, and Harrison City, reflecting the region's industrial and residential growth. For genealogists and local historians, the sheet is exceptionally detailed in its recording of local cemeteries, including Old Brush Creek Cem and Old Mars Hill Cem, providing vital clues for family research across these townships.

Transportation infrastructure dominates the modern geography, with Interstate 76 cutting a wide path through the center near Hahntown and Ardara. Smaller residential clusters such as Scab Hill, Penn Glyn, and Sunset Valley fill the spaces between larger boroughs. Significant water features like Indian Lake and Barnes Lake are noted alongside the smaller Biddle Pond, while higher ground is marked by Barners Hill overlooking the valley.