OK here's the DIY link.
http://www.koiphen.com/forums/showthread.php?t=51710You have to join to see the pictures.
Now about your set-up. No you don't want the pond to be a flow through for your runoff. From the asphalt in your roof to the creosote in your RR ties.
If it were me, I would consider a drain large enough to handle your biggest downpours and then some, where the patio stones end. Dig a deep trench to daylight the drain pipe well beyond your pond location. It doesn't have to be really deep if you run it along the side (underground) of your pond/stream. Then build your pond however you want with the run off taken care of. You will want the pond located where you can view it from the main hangout place in the house if possible—kitchen window, living room window, etc. You also want a nice place to view it from outside.
Maybe the pond could be at the top of the RR ties and flow over them and the stream run down that channel—that would help with the depth for running your drain pipe if a pond wasn't over it. You could use the drain pipe trench to run your pond plumbing too.
If you put the pond outside that four pane kicked out window, the falls could stair step in that corner near the house where the ties are at two different levels, you'd have to redo some patio stones if you took your stream down the channel though. Looks like you have lots of potential at your place.
Do lots of research and ask a bunch of questions, that way you won't have to build as bad a pond as many of us did before we knew anything. And yes everyone has a different opinion and that can be frustrating too.