We are going to build a inground L shaped pool and was wondering what depth is a good depth for the shallow leg. The dimensions of the pool will be 45 x 20 and 36 x 18. The 36 x 18 leg will be the shallow area. We just received the engineering drawing and they have it at 3 1/2 feet at one end tapering to 4 1/2 at the other end. I had the impression that it would be 3 1/2 all the way . We would like this area for playing volleyball, basketball and catch etc. 4 1/2 seems a little deep. Is tapering this area standard? Is 3 1/2 feet adequate or to shallow? What do you think? We are just an average size family with 3 kids ages 12 to 18. Your insights are always welcome.