The hasty post-disaster evacuation prevented proper shutdown procedures from being followed. Map Description: 'This water treatment facility was the final stop for waste water after residue processing. This facility supplied sensitive materials to the Lambda Complex.' Map Description: 'Black Mesa's underground transit system is one of the largest and most complex in the world. It has since fallen victim to time and nature.' Map Description: 'This distant storage facility was once used to house Black Mesa's early satellite prototypes and parts. Map Description: 'The access road to Black Mesa's Communications Division was considered the perfect environment for testing and training.' Map Description: 'The old, disused Black Mesa Transit System is home to many unexpected surprises.' Map Description: 'The decrepit facility that powers Black Mesa's Transit System is as dangerous as it is old.'

Map Description: 'Several weeks post-disaster, the military recovery and cleanup operation in the heavily shelled Lambda Complex hit some particularly nasty hurdles.' Some clues about its experimental history lurk beneath the surface.' Map Description: 'This Gasworks complex was built to power early teleportation tests. Map Description: 'Somewhere out in the vast expanses of the New Mexico desert, the Black Mesa Nuclear Testing Team decided to hide a big red button.' Map Description: 'At the end of the Black Mesa Transit System, this suspicious cargo facility is the last stop before Residue Processing.' It is now classified as a biohazard zone, for unknown reasons.' The Transit System is the primary form of transportation throughout the facility, which uses the monorail system, a transportation system based on a single beam. Map Description: 'This canyon used to play host to a classified mining operation. The Black Mesa Transit System, or tram, is the extensive monorail network linking the many different Sectors of the Black Mesa Research Facility.

Black mesa transit system