A Geotech report and foundation recommendation are a must. I would suspect you'll end up with some sort of pile footing with a large concrete cap. If the wind turbine is tall you may end up with battered piles. If scour is a problem, and working with a tide I would suspect so, you will either...
ACI did a report ACI229R-94, titled "Controlled Low Strength Materials (CLSM)". I haven't looked to see if there has been an update although I'm sure it has.
CLSM with compressive strengths less than 300 psi are geared toward future excavation into the material. If you do not anticipate future...
If you have used AutoCad then you should be familiar with model/paper space but may have never worked with XRef's.
1) Setup your title block and sheet border in a drawing file in model space at 1:1 ratio. On it can go your logo, date, project title, address, etc. This should be information...
The PCA tables are based on two-way slab action for aspect ratios between 0.5 and 3.0. When less than 0.5 or more than 3.0 you have one-way action. So if you tank is 40' deep with 6'x6' walls you can analyze the structure using a triangular soil load distribution plus the hydrostatic loading...
Use the PCA manual for Rectangular Concrete Tanks. It gives table values for aspect ratios based on depth. If your structure is 50' tall how much is below grade and below water table. For a 6'x6' structure you will have very little bending moment and need to look at shear.