I would have liked to put in a valve, and I actually have a 12" (for sale now), but for whatever reason, it didn't get installed. The siphons will drain it if necessary.
The 2 story structure is the other owner of the property. He has posted some pics on this site, but I won't call him by name right now. It shouldn't be hard to figure out. He loves deer.
Sunil, there are some minnows swimming around in the shallow water, but I have no idea what kind. Seriously, if you or anyone else has recommendations on what I should do next, please let me know. I am thinking I would like to stock it with BG and SMB. My goal is to have good fishing for the kids and low maintenance.