A Prawn Suit with a drill arm is recommended for optimal gains from this chamber. It can also be accessed from the Thermal Spires Caves, through the large cave system under Delta Island's dock which leads into a mineral-rich chamber, at the deepest point of the site. there's a small cave opening, located on the western side of Delta Island, in the Thermal Spires that leads to the other side of the door and it is big enough for the Seatruck to go through. Entering it through the top of the door is easiest. Seatruck access through the main door is hard, but doable.
The mining site is accessible from the Thermal Spires on the western side of the island through a partially-opened main door at 150 meters of depth that is wide enough for a player or Prawn Suit.
Players should remain wary of Oxygen and Lava Geysers if exploring without a Prawn Suit. Rooms beyond the main shaft contain multiple Rock Punchers. It is littered with technology left by the Alterra Corporation, most notably Prawn Suits and Thermal Plants, amongst others. Koppa Mining Site is an aquatic, cavernous biome located under the Delta Island.
