; and (E) responsibilities for the pumping and operational costs necessary to provide the total water supply available made inaccessible due to drought pumping during the preceding 1 or more calendar years, in the event that the Kachess Reservoir fails to refill as a result of pumping drought storage water during the preceding 1 or more calendar years, which shall remain the responsibility of the participating proratable irrigation entities. (2) Use of Kachess Reservoir stored water (A) In general The additional stored water made available by the construction of facilities to access and deliver inactive storage in Kachess Reservoir under subsection (a)(2)(A)(ii)(I) shall— (i) be considered to be Yakima Project water; (ii) not be part of the total water supply available, as that term is defined in various court rulings; and (iii) be used exclusively by the Secretary— (I) to enhance the water supply in years when the total water supply available is not sufficient to provide 70 percent of proratable entitlements in order to make that additional water available up to 70 percent of proratable entitlements to the Kittitas Reclamation District, the Roza Irrigation District, or other proratable irrigation entities participating in the construction, operation, and maintenance costs of the facilities under this title under such terms and conditions to which the districts may agree, subject to the conditions that— (aa) the Bureau of Indian Affairs, the Wapato Irrigation Project, and the Yakama Nation, on an election to participate, may also obtain water from Kachess Reservoir inactive storage to enhance applicable existing irrigation water supply in accordance with such terms and conditions to which the Bureau of Indian Affairs and the Yakama Nation may agree