; and (2) water use facilities between the 815-foot (MSL) contour elevations on the Tellico Reservoir side of the lands subject to this Act and the adjacent waters of Tellico Reservoir and in and on such waters after having received written consent from the Tennessee Valley Authority and subject to the terms of such approval, but may not construct, own, operate, or maintain other nonhabitable structures, facilities, and improvements on such lands. (c) Ingress and egress The Eastern Band of Cherokee Indians may use the lands subject to this Act and Tellico Reservoir for ingress and egress to and from such land and the waters of the Tellico Reservoir and to and from all structures, facilities, and improvements maintained in, on, or over such land or waters. (d) River control and development The use rights under this section may not be exercised so as to interfere in any way with the Tennessee Valley Authority’s statutory program for river control and development. (e) TVA authorities Nothing in this Act shall be construed to affect the right of the Tennessee Valley Authority to— (1) draw down Tellico Reservoir; (2) fluctuate the water level thereof as may be necessary for its management of the Reservoir