The Maintenance Building 04 was a building located under a waterfall along the river.


The building is covered by a waterfall and you have to use a code to get through. The code, 1023, was etched on the side of the code box. It has a hard, steel door.


Inside the building is a cart (Maint. Vehicle 04/22) designed to be used for transport. It goes into a tunnel which leads to the Visitor Center.


  • Despite its similar title, it is not at all affiliated with the Sauropod Maintenance Building 04, as they are far away from each other.
  • Note that the keypad is described as a "nine-digit" keypad, although the inclusion of the number zero as part of the code seems to indicate there should be ten digits.
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