Okeedok. I won't worry about changing valves for the alpha, that little stuff won't matter much. I wasn't sure how those pipes came into play, so I actually had those two valves controlling water flow (off/on) from their ends. Reckon I'll have to delete that stuff --
Screenshot of what I had there:
http://www.trespasserextras.com/pipes.jpg
*Or, we could alter your plan some, suggest that those pipes continue on into the turbine itself as you plan, though the two short pipes on side of concrete block shown in pic below could designate overflows. The crude upright valve shown atop the concrete block would open up the flow, allowing excess water collected inside the turbines to drain. It could be considered a system flush. It'd also add a little something to the area, give the players something to play around with.
http://www.trespasserextras.com/overflow.jpg
btw, if I brought out the top landing of the stairs to the edge of the cavern there, they were coming way too close to the concrete base and stairs supporting the turbines. So, I cut down the length of the landing some so that the layout resembles that pic. I hope you don't mind me messin' with your model.
