Re: fly fishable from bank and or wading CFS
The flow is just part of the story. If it is water with vertical banks then it is very hard to wade at high flows. If the banks are flat then you can usually find wadeable sections along the edges. With vertical banks you have to measure the water depth before you step into the water. Also with high flows and vertical banks it is very dangerous if you get swept off of your feet. It will be difficult to recover.
So try to find flat bank areas and fish the edges. Always wear an inflatable flotation devise and use a wadding staff.