; and water use (1) Water resource facilities (A) Definition In this section, the term water resource facility means— (i) irrigation and pumping facilities, dams and reservoirs, flood control facilities, water conservation works, including debris protection facilities, sediment placement sites, rain gauges and stream gauges, water quality facilities, recycled water pumping, conveyance distribution systems, and treatment facilities, aqueducts, canals, ditches, pipelines, wells, hydropower projects, and transmission and other ancillary facilities; and (ii) other water diversion, storage, and carriage structures. (B) No effect on existing water resource facilities Nothing in this section shall alter, modify, or affect— (i) the use, operation, maintenance, repair, construction, reconfiguration, expansion, or replacement of a water resource facility downstream of a wild and scenic river segment designated by this section, provided that the physical structures of such facilities or reservoirs shall not be located within the river areas designated in this section