Allegheny County Map, 1889. From History of Allegheny County Pennsylvania, A. Warner & Co., Publishers, 1889.
USGS Topographical Map The township images are cropped from a 1/50,000 USGS Geological Survey Map of Allegheny County dated 1983. The 1/24,000 maps which are the basis of the county map are dated 1982.
Depreciation Lands in Allegheny County. Shows the five surveying districts of the Depreciation Lands superimposed over current counties. (Pennsylvania Department of Internal Affairs Annual Report of the Secretary of Internal Affairs, 1892).
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Updated 17 Oct 2005