Cecil has a few 1/10 ac ponds, oval in shape, probably 10' deep. Slopes are too steep to walk on. You'd need a ladder to get out if you fell in and the water level wasn't to the top of the pond.
Depending on water flow, run it thru a packed column to oxygenate the water before it enters the pond, and let the overflow run to another pond.
Personally, I wouldn't make the slopes steeper than 3:1.
