It looks like(from the pictures) you have a very usable resource.
What you need to do at this point is determine and accurately measure several things.
You need to determine your head, flow and GPM of the stream (google them there are plenty of sites that tell you how, as there are several discussions on how to do so here).
Once you have determined your basics, then figuring out how to capture your resource is next.
The different systems have their pluses and minuses. if you have enough fall, a pelton wheel is usually used (however this would not be a good utilization on the 10' axial as peltons are high rpm devices, so to use it, you would have to gear it down..). A Banki turbine (or one of the derivatives) is usually used for medium fall situations but requires a dam to be built. An undershot wheel is good for large streams with plenty of GPM and no to little fall. These are by no means the only solutions, as waterpower has been around since civilization has.
You also need to determine things like what are your power requirements? Does the stream freeze? What is the lowest flow it has?