Indiana’s drainage law is complex and includes many traps for the unwary. The following is an introduction to Indiana drainage law.
Indiana Drainage Law Explained! (with commentary by The Kankakee River Log on BigEastern.com) .pdf
Indiana Drainage Law (the Whole Enchilada)

Large Regulated Drain recently stripped of all vegetation. Leaving trees on the bank would have helped prevent erosion, sedimentation and pollution downstream.

Here is another ditch. Before ditch maintenance and ...

after drain maintinance. This Ilistrates what can legally be done to a regulated drain - even without permission from the land owner.