Description: Dam data for the Chesapeake Bay watershed. This data was compiled from mulitple state and federal sources and edited by The Nature Conservancy for use in the Northeast Aquatic Connectivity project and the Chespaeake Fish Passage prioritization. These data were "snapped" to the high-resolution (1:24,000) National Hydrography Dataset, so that the dam points are geometrically coincident with the stream lines. The data underwent several quality control checks to help ensure that dams are located in the proper location.
Service Item Id: a22295ffbba94ed88111bff24a5f4a8c
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"Dam data compiled from multiple state and federal sources and edited by The Nature Conservancy for the Chesapeake Fish Passage Prioritization project"
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Original Source data:
DE: Delaware Dams: DNREC;
MD: MD DNR
PA: Division of Dam Safety, Department of Environmental Protection; PA Fish and Boat Commission;
VA: VA Dept. of Game & Inland Fisheries;
WV: WV DNR: Wildlife Diversity and Technical Support Units; WV Non-coal dams, DMR Dams, NID dams: WV State GIS Data Clearinghouse: http://wvgis.wvu.edu/data/data.php;
US Army Corps' National Inventory of Dams;
USGS Geographic Names Information System (GNIS);
Multiple aerial photographs & topographic maps obtained from Esri's ArcGIS Online (http://www.arcgis.com/home/)