; acquisition of lands, and interests in lands; and preparation of lands for farming, and for construction of the Navajo Indian Irrigation Project pursuant to Public Law 87–483 ; $154,809,000, to remain available until expended: Provided, That such amounts as may be available for the construction of the Navajo Indian Irrigation Project may be transferred to the Bureau of Reclamation: Provided further, That any funds provided for the Safety of Dams program pursuant to the Act of November 2, 1921 ( 25 U.S.C. 13 ), shall be made available on a nonreimbursable basis: Provided further, That this appropriation may be reimbursed from the Office of the Special Trustee for American Indians appropriation for the appropriate share of construction costs for space expansion needed in agency offices to meet trust reform implementation: Provided further, That of the funds made available under this heading, $10,000,000 shall be derived from the Indian Irrigation Fund established by section 3211 of the WIIN Act ( Public Law 114–322