Indiana Code Title 36. Local Government § 36-9-27-70

Sec. 70. (a) This section applies whenever the plans and specifications for the construction or reconstruction of any regulated drain disclose that the center line of the drain at any point will come within three hundred (300) feet of any levee that is subject to or was constructed under any statute.

(b) The county surveyor in charge of the work on the drain shall mail the plans and specifications for the drain by certified mail with return receipt requested to the Indiana department of natural resources.  The department shall approve or disapprove the plans and specifications within forty-five (45) days after receiving them.  If the department fails to act within the time limit, the plans and specifications are considered approved.  If the department disapproves the plans and specifications, it shall issue an order stating the reasons for the disapproval, shall recommend specific changes in the plans and specifications that would make them acceptable to the department, and shall serve a copy of the order on the surveyor.

(c) Work on the drain may not be commenced until the plans and specifications have been approved by the department, or until the board is satisfied that the county surveyor has changed the plans and specifications to conform with the department's recommendations.