104 State Water Plan Watersheds: Pennsylvania
1998. Environmental Resources Research Institute. Digitized boundaries of 104 major watersheds defined in the Pennsylvania state water plan. The State Water Plan, originally developed in the 1970s,...
Boundaries Of Exceptional Value Watersheds: Pennsylvania
1996. Environmental Resources Research Institute. Watersheds of exceptional quality streams.
Major River Basins: Pennsylvania
1998. Environmental Resources Research Institute. This polygon layer delineates the boundaries of 8 major watersheds in Pennsylvania that have shown through past vertebrate inventory collection rec...
1996. Environmental Resources Research Institute. Major rivers as derived from Pennsylvania Dept. of Transportation's streams database, which is organized by county.
Networked streams of Pennsylvania
1998. Environmental Resources Research Institute. The connected network of streams and waterways of Pennsylvania are indicated as single lines in this coverage. Waterways are given connected topolo...
1996. Environmental Resources Research Institute. State designated scenic rivers.
Small Watersheds: Pennsylvania
1997. Environmental Resources Research Institute. Boundaries of 9,895 watersheds in Pennsylvania indicated in the Pennsylvania gazetteer of streams. These boundaries enclose catchment areas for nam...
Spring Creek Watershed streams: Pennsylvania
1996. Environmental Resources Research Institute. Streams within the Spring Creek Watershed.
