Black Rock Quarry Control Point. Control point in black rock quarry. Use Levitate to climb the platforms and then follow the sewers until you find a door that leads you back to the Furnace Chamber.
You want to start at the Quarry Entrance. Use DrUnderhills pills to access this area. There will be a level five security door up here and through it there will be several platforms to levitate up.
When youre ready keep heading towards the Black Rock Quarry.
Deception975 2 years ago 2. In the room just past the Black Quarry Entrance Control Point the one where all the monsters and Hiss attack you is a doorway located. After that you have to take control of the control point. The Quarry Threshold also known as the Black Rock Quarry is a Threshold located in the Maintenance Sector of the Oldest HouseThe Federal Bureau of Control uses the quarry to mine for Black Rock a material highly valuable to them due to its ability to negate paranatural effects.