Illinois Drainage Guide

http://www.wq.illinois.edu/DG/DrainageGuide.html

IGrow Resources

http://igrow.org/drainage-calculators/

Drain tile capacity calculator

https://www.prinsco.com/resources/drainage-calculator-by-pipe-size/

Run length chart

http://www.spipipe.com/resources/ag_lateral_lengths_calculator.pdf

Lift Pump Resource from NDSU

https://www.ag.ndsu.edu/publications/crops/tile-drainage-pump-stations-for-farm-fields