Said board of directors is hereby authorized and empowered to treat, contract and negotiate with what is known as the Mississippi River Commission, heretofore created by an act of the Congress of the United States, or with any other agency of the United States government, for the purpose of securing the construction, repair and maintenance of the levees within their levee district, or the aid, assistance or cooperation of said river commission or other agency in the construction, repair and maintenance of said levee or line of levee, or any part thereof, and to this end said board of directors may turn over to said Mississippi River Commission or other agency the use and control of any part of its line of levee or the whole of said line; may place its officers, servants and agents at the disposal of and under the direction of said Mississippi River Commission or other agency; may take in charge and superintend contracts for levee building and the building of the same, and generally shall have full power, authority and discretion to enter into any and all arrangements, contracts and agreements with said Mississippi River Commission or other agency of the United States government that will secure the construction of the levee and protection of the levee district from overflows and inundations from rivers, by said Mississippi River Commission or other agency, or their cooperation in such construction and protection.