; and water use (1) Water resource facilities (A) Definition In this section, the term water resource facility means irrigation and pumping facilities, dams and reservoirs, flood control facilities, water conservation works and facilities, including debris protection facilities, sediment placement sites, rain gauges and stream gauges, water quality facilities, recycled water facilities and water pumping, conveyance distribution systems, water storage tanks and reservoirs, and water treatment facilities, aqueducts, canals, ditches, pipelines, wells, hydropower projects, and transmission and other ancillary facilities, groundwater recharge facilities, water conservation, water filtration plants, and other water diversion, conservation, groundwater recharge, 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, destruction, reconfiguration, expansion, relocation 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