Plunge down Coastline Plunge℠ - Hydro water slide and experience a thrilling course of open-air slides, dark tunnels, an over 50 degree drop, and back-to-back serpentine curves on a 1 or 2 person inline tube. The slide ends in a splash pool that is 3.5 feet deep. Are you ready to take the plunge? Attraction availability is subject to change. Operation of attractions is subject to weather conditions.