I would like to suggest a next step for the mine data,
to drill into the webpage and extract the item extracted.

for example:
http://tin.er.usgs.gov/mineplant/show.php?labno=5927
Site name Murray Mine
Company name Murray Mines, Inc.
Mine or Plant M/P
Commodities
Commodity Sand and Gravel

This could be parsed and added into OSM via the
ref=* and operator=* and resource=*

Thanks to goldfndr__ for his advice.

Also for the EPA hazards, you have this data :

http://iaspub.epa.gov/enviro/national_kml.registry_html?p_registry_id=110000801222

The data about each hazard is for example :
FACILITY PROGRAM INTERESTS
PROGRAM INTEREST PROGRAM ID
RESOURCE CONSERVATION AND RECOVERY ACT INFORMATION SYSTEM
HAZARDOUS WASTE LARGE QUANTITY GENERATOR NJ0000061846

but about each site there is lots of data:
http://iaspub.epa.gov/enviro/fii_query_detail.disp_program_facility?p_registry_id=110000801222

http://www.epa.gov/osw/hazard/generation/lqg.htm

We could add these symbols into the OSM map icons.

mike