My dad made me a pretty simple dock for my turtle with PVC and some sort of resin-coated board- easily made with tile or other building materials (NOT wood). It will easily hold her for a long time. The hardest part of the process was measuring the PVC pipes to the correct length! No adhesive needed- He screwed the board directly into the PVC, and its holding up fairly well to her abuse. PVC and tile structures seem pretty popular, as do ones made from diffuser panels. they're not the prettiest of solutions, but very functional. If you raise your water level, make sure you have a lid- I learned the hard way that RES are determined climbers!!

troublemakers....Good luck!