I've stayed at Poly, WL and BC, and all three drop you into water from the slide at about the same height. I can't remember exactly what it was. But I'm 6' tall, and it was deep enough for me to come out on my back, sink completely into the water, and submerge my head, but shallow enough for me to stand up and be not much above waist deep in water. 3.5 feet may be pretty accurate.