1999. U.S. Geological Survey. This map layer includes the locations of over 500 majors dams in New York State. The information in the map layer was provided by the U.S. Army Cor...
1998. Ithaca-Tompkins County Transportation Council, Tompkins County ITS GIS Division. Bridges in Tompkins County. Provides a location of each bridge, as well as certain information about each bridge, such as the State DOT Identifier...