Learn Drainage System Design
ISU is putting on a three-day drainage system planning course on 23-25 August at Nashua. It's put on by Dr. Matt Helmers and Greg Brenneman, among others. I know and respect these guys. If they tell you that water runs downhill, you'd better believe them. If they tell you that water runs uphill, I'd ask a question or two but not throw them out with a trial. They have years of experience.
The school costs $350 which is a lot of money except that it's well worth it.