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Federal
Digital Geologic-GIS Map of Johnstown Flood National Memorial and portions of Allegheny Portage Railroad National Historic Site, Pennsylvania (NPS, GRD, GRI, JOFL, JOFL_ALPO digital map) adapted from a Pennsylvania Geological Survey Water Resource Report map by McElroy (1998)
Department of the Interior —
The Digital Geologic-GIS Map of Johnstown Flood National Memorial and portions of Allegheny Portage Railroad National Historic Site, Pennsylvania is composed of GIS... -
Federal
Hydrologic characteristics and water quality of headwater streams and wetlands at the Allegheny Portage Railroad National Historic Site, Summit area, Blair and Cambria Counties, Pennsylvania, 2014-2016
Department of the Interior —
This data release reports water-quantity and water-quality data collected during 2014-2016 by the U.S. Geological Survey (USGS) and in cooperation with the National...