The Secretary or the State pursuant to an approved State program, shall have the power and authority to construct and operate a plant or plants for the control and treatment of water pollution resulting from mine drainage. The extent of this control and treatment may be dependent upon the ultimate use of the water: Provided, That the above provisions of this paragraph shall not be deemed in any way to repeal or supersede any portion of the Federal Water Pollution Control Act (33 U.S.C.A. 1151, et seq. as amended) [
33 U.S.C.
1251 et seq.] and no control or treatment under this subsection shall in any way be less than that required under the Federal Water Pollution Control Act. The construction of a plant or plants may include major interceptors and other facilities appurtenant to the plant.