Inside were several gates with glowing keypads that led into tunnels within the mountain that the facility was built upon. Within the tunnels were hundreds of thousands – perhaps millions – of complete medical records for American citizens stored in thousands of file cabinets. Records for Samantha Mulder and Dana Scully were included. Inside also were a group of short alien-like beings, perhaps alien/human hybrids.
In 1995, Fox Mulder first learned of the mine's significance from an old photograph showing his father, the Cigarette Smoking Man, the Well-Manicured Man, Victor Klemper and others in 1973. He visited Klemper with Scully, and Klemper told him the name of the facility.
Agents Mulder and Scully discovered the mining company seemingly long-abandoned from its appearance. However, they got inside the gates and Mulder found his sister's file that had her name written over his – implying that he had originally been intended for her fate. They also found Scully's file with data as recent as her abduction by Duane Barry. Mulder theorized that the Syndicate was collecting vast amounts of medical data for some sinister purpose, but they were chased away by armed agents. Prior to their escape, however, Scully encountered the aliens. (TXF: "Paper Clip")
- Strughold Mining Company shares its name with Conrad Strughold.