The additional mines added and the mines which were repositioned in this version of the data were done after being located by investigating two USGS 7.5 minute quadrangles (Franklin and Riegelsville) on the ground by a geologist. The newly discovered and revised mine locations totaled 44 and were located using the global positioning system (GPS) and put into a database. The coordinates were recorded in Latitude Longitude with the GPS receiver. They were then converted to New Jersey State Plane Feet NAD83 northing and easting and exported as a dBASE file. This dBASE file was appended with the previous abandoned mines shapefile dated July 29, 2005. Any mine location which existed in the previous mines shapefile that had been relocated were deleted from this shapefile before the append so any duplication of mines was avoided.
The database contains the sitename, the alternate mine name, the mine dates of operation, the major mineral type extracted, the municipality where the mine is located, the county where the mine is located, it's coordinates, primary references, the major element at the mine, the USGS 7.5 minute quadrangle where the mine is located, information on whether the mine was located using the global positioning system and when the mine information was updated. If there was no unique SITENAME specified, it is recorded as 'UNNAMED". If there was no date of operation it was recorded as "0".