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1981. Watercourses Designated for Protection 2012 - polygon: Philadephia, Pennsylvania
2016. City of Philadelphia - PWD. AbstractPolyline geometric features representing the center flow line of all waterways in Philadelphia only.Data DevelopmentInitial data was captur...
1982. Watershed boundaries for New York clipped to the Delaware River Basin
2004. Delaware River Basin Commission (DRBC). Watershed boundaries for New York clipped to the Delaware River Basin.
1983. Watershed boundaries for Pennsylvania clipped to the Delaware River Basin: Pennsylvania
2004. Delaware River Basin Commission (DRBC). Watershed boundaries for Pennsylvania clipped to the Delaware River Basin.
1996. Watersheds, 11-digit Hydrologic Units: Indiana
2002. United States Geological Survey. WATERSHEDS_HUC11_USGS_IN is a polygon shapefile showing the boundaries of watersheds in Southwestern Indiana. Watersheds are noted by a 11-digit hy...
1997. Watersheds: Allegheny County, Pennsylvania
2000. Allegheny County Division of Computer Services Geographic Information Systems Group. Polygons marking borders of watersheds in Allegheny county.
1998. Watersheds for New Jersey clipped to the Delaware River Basin: Delaware River Basin
2004. Delaware River Basin Commission (DRBC). Watersheds for New Jersey coded to 14 digit Hydrologic Unit Codes (HUC) clipped to the Delaware River Basin.
1999. Watersheds of the Susquehanna River Basin at Aprrox. 1:24,000 Scale: Susquehanna River Basin
2006. SRBC. Polygon shapefile that includes approximately 1:24,000 scale watersheds in the Susquehanna River Basin (2006 boundary). This file was created by me...
2000. Watersheds: Washtenaw County, Michigan
2010. Washtenaw County Drain Commissioner's Office. This feature class displays all of the largest drainage areas in Washtenaw County. It has been developed to meet the needs of upstream and downstre...