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Aquifers
This map layer contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons. The map... -
POL Pumping Stations
This feature layer represents POL Pumping Stations. A POL Pumping Station is a facility that supports the transportation of petroleum products from one location to another via a... -
National Bridge Inventory (NBI) Bridges
The NBI is a collection of information (database) describing the more than 600,000 of the Nation's bridges located on public roads, including Interstate Highways, U.S. highways,...
