The Tombigbee Valley Authority is hereby authorized and empowered to do any and all things necessary or desirable in making a survey or surveys of that portion of the Tombigbee River situated in the State of Mississippi and its tributaries to investigate the possibilities of developing that portion of the Tombigbee River lying and being in Mississippi, which comprises a segment from the Tennessee River on the north through the States of Mississippi and Alabama to the Gulf of Mexico at Mobile, Alabama, in co-operation with the federal government and any and all agencies thereof assisting in such survey or proposed plans for projects which upon completion would lead to the industrial development of this state, to the opening of an additional inland waterway to the Gulf of Mexico, and to the control of the flood waters of the Tombigbee River in Mississippi. It is contemplated that plans be considered and surveys made for the opening of a water route from the northern headwaters of the Tombigbee River, and particularly the east branch of the Tombigbee River, its tributaries, and the Tennessee River as a part of the over-all plans to be considered by this authority.