; and (2) the allocation percentage obligation held by the Central Valley Project water contractors on the day before the date of the enactment of this Act shall be held by the Bureau of Reclamation. 5. Report Not later than 1 year after the date of the enactment of this Act, the Secretary shall submit to Congress a report that includes an account of amounts that irrigation districts and water user associations contracted with the Bureau of Reclamation for agricultural water deliveries owe to the Bureau of Reclamation related to debt incurred for construction of facilities and other aspects of the Klamath River Basin Reclamation Project. 6. Water operations in Upper Klamath Lake When operating the Klamath River Basin Reclamation Project, the Secretary, in accordance with State-adjudicated water rights, shall— (1) operate all water in Upper Klamath Lake above elevation 4136.0 feet solely for agricultural and refuge purposes; and (2) to the extent practicable when operating all water in Upper Klamath Lake in accordance with paragraph (1), maximize storage in the Upper Klamath Lake.