Reaching the "mezzanine",opening the hatch of the catwalk,then looking down..The first time I was down,one of the rung gave up..ewww..not knowing about the depth of the water there,and the extremely loud sound of the water,I had a little rush of "aDRAINalin"!! But it was ok !! The water is not that deep..but the flow is quite heavy..Down there,2 pipes facing each other..one very quiet but promissing and the other providing a nice little fall.