required Water Depth

hey everyone,

Just wondering what type of water depth i would need to dock a 2004 mastercraft x-star and not have to worry about running ground also how much more depth i would need for a boat lift for it. I'm looking at a house on the water and wondering how far out i'd have to build a dock to get me to the depth required. the river i'm looking at can fluctuate as much as 3 feet in water hight so i'm wondering what the absolute minimum is before my boat is sitting on the hull.

Thanks,
will