Stanb999, looks like a great project, hopefully you won't get alot of silt during heavy rain.
Screening and fencing will help to keep the critters out and maybe some plywood over half to give some shade, also keep a thermometer in it to monitor summer temps.
As far as trout, brooks and rainbows would be a good start cause you really can't be sure of the summer temps. yet.
Untill you see how they fare I would keep the number low, maybe 15 or 20 total in the 10" range.
Are you going to use a feeder or do it by hand?, you could also throw in some minnows if you have access to them.
Good Luck and keep us updated.
