The U.S. Geological Survey hosts the National Geologic Map Database (NGMDB). This interactive tool serves as a national archive for high-quality, standardized geologic maps created by the U.S. Geological Survey and state geological surveys.
The MapView section of the NGMDB displays geologic maps from across the country dating back to 1879. The database is searchable by address, and results can be narrowed further using scale and date filters.
The U.S. Geological Survey’s National Water Information System (NWIS) created an interactive tool that maps water resources data at over 1.5 million sites across the country. The search tool allows the user to find sites by street address, location name, site number, state/territory, and watershed region. The sites are sorted into five main categories:
The National Ground-Water Monitoring Network compiles information from over 7,000 groundwater monitoring wells across the country, including Federal, State, and local groundwater monitoring networks. Although the image above only shows the contiguous United States, the interactive map also includes wells from Alaska, Hawaii, Puerto Rico, Guam, and the U.S. Virgin Islands.
The Kentucky Mine Mapping Information System is produced by the Kentucky Energy and Environment Cabinet to allow users to access maps of coal mines and mined out areas in Kentucky. Users can search by company name, seam name, or state file number (SFN). For each map, overview information is provided where available (map year, mine status, mine owner, mine type, seam thickness, etc.), and users are directed to the map. Users can also overlay information on oil and gas activity on the map.