Sites of Interest for Enviro History in PA

Altoona Topo Map This topographical map of the Altoona area was made @ 1920

Hollidaysburg Topo Map This topographical map of the Hollidaysburg area was made @ 1920

Explore PA History This excellent site

Appalachian Econ This excellent site

Water and Sewers in Philly History This excellent site

PHMC This excellent site

Pittsburgh This excellent site

GNMP This excellent site

Library of Appalachia This excellent site

Wopsy and Toon Town This excellent site

The Valley of the Shadow This excellent site

Hollidaysburg Photos This excellent site

Portage RR and Canal This excellent site

Johnstown Flood This excellent site

Blair County Geneology This excellent site

Historical Maps of PA This excellent site

PA State Archives This excellent site

PA Geological Maps, historical This excellent site

I-99 development This excellent site

Sites of Interest for U.S. Enviro History

Nature Transformed This excellent site

AA Gardens This excellent site

Sites of Interest for Energy History