AMLI_MINE_ID is a unique identifier for each mine site and mine-related site located for the USGS Abandoned Mine Lands Initiative (U.S. Geological Survey, 2002, Integrated investigations of environmental effects of historical mining in the Basin and Boulder mining districts, Boulder River watershed, Jefferson County, Montana: USGS Professional Paper P1652). LOCATION_STAT describes the relative certainty of the location of a site, SHAFTS and ADITS lists the number of each of these features at a site, NUM_FLOW_ADITS records the number of flowing adits at a site, and MILL_EXIST tells the historical or current presence of a mill at a site. DUMP_QUANTITY and TAIL_QUANTITY record the amount of waste rock and mill tailings at a site, and PAST_PRODUCT lists a site's output in relative terms. Only AMLI_MINE_ID and NAME have values for all these attributes.
There is also a table, MINE_SITES.ADITFLOW, which contains information about flowing adits that exist at some of the mine-related sites. This table is logically linked to the MINE_SITES.PAT file by the AMLI_MINE_ID. Some mine sites have one or multiple flowing adits, while many have none. There is one record in the MINE_SITES.ADITFLOW table for each flowing adit that was found during the research for the creation of this dataset. Where known, the flow rate and pH of a flowing adit is contained in the items FLOW_RATE and PH.