So if I understand,the water is coming from all the drains from the north side of PC(in this area),collected by the pipe spilling its water in the rectangle room next door,rushing west under the guillotine door,getting 5-6 feet lower on a slide,then few feet after falling down a drop of maybe 5 feet,to engage in a 180 degrees sharp U turn heading east for 10 feet then taking a 90 degrees turn left to this waterfall of maybe 5 or 6 feet tall.....--->