National Park Service U.S. Department of the Interior Natural Resource Program Center Allegheny Portage Railroad National Historic Site

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Date: 2010-09-10 12:28:22 Johnstown Flood Palmer Drought Index Allegheny Portage Railroad Rain Climate National Weather Service Drought in Canada Pennsylvania Droughts Johnstown Pennsylvania		National Park Service U.S. Department of the Interior Natural Resource Program Center Allegheny Portage Railroad National Historic Site Add to Reading List Source URL: science.nature.nps.gov Download Document from Source Website File Size: 793,95 KB Share Document on Facebook

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