The width of the base of the levee fill will necessarily depend upon whether that fill be over an elevation or a depression ... 4) To acquire by purchase, condemnation, or otherwise, lands, rights of way, and materials necessary in carrying out the ... stumps and their roots which arise above the bottom of the water in said lagoons, lakes, or rivers removed therefrom for the ... and will form a much needed drainage canal on each side of the spillway. ...