Sec. 15. If requested by a petition signed by a majority of the owners of land protected by the levee, the committee in charge of a levee may do the following:
(1) Make additions to the levee by increasing the height or width of the levee.
(2) Protect against the encroachment of a stream and take all necessary steps to protect and prevent the washing and cutting away of the banks of the stream by the construction of a suitable work that will prevent the washing or cutting of the banks.