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Keywords from Image Description:
USGS overview indicating Kittanning Gap's Pennsylvania location near Altoona PA and showing the PRR Horseshoe Curve. Kittaning Gap by name Pennsylbania near Altoona PA and showing the Pennsylvania Railroad PRR Horseshoe Curve usgs gov NO PFID CPTITLE CTownshipofPortage FrankB other versions PDUSGov Streams in Pennsylvania Valleys