So in original. Probably should be followed by “of the”.
Smith River (from its headwaters to its confluence with the Middle Fork of the Smith River).
Editorial Notes
References in Text

This subchapter, referred to in subsec. (d), was in the original “this Act”, meaning Pub. L. 101–612, Nov. 16, 1990, 104 Stat. 3209, which is classified principally to this subchapter. For complete classification of this Act to the Code, see Short Title note set out under section 460bbb of this title and Tables.