; or (II) authorizes the District to manage or maintain Mancos State Park. (iv) Termination (I) Notice If the State permanently closes Mancos State Park, the State shall terminate the easement conveyed under clause (i) by written notice to the Secretary and the District. (II) Effect On the termination of the easement under subclause (I), all affixed structures, facilities, or other improvements paid for by the State within Mancos State Park shall become the property of the District at no cost to the District. (3) Compliance with environmental laws (A) In general Before completing any conveyance under paragraph (2)(A)(i), the Secretary shall carry out all actions required under— (i) the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq.); (ii) the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq.); or (iii) any other law applicable to the property conveyed. (B) Effect Nothing in this Act modifies or alters any obligation of the United States under— (i) the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq.); or (ii) the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq.). (4) Jackson Gulch Dam (A) Possession The United States shall retain possession of the Jackson Gulch Dam. (B) No effect on transferred works agreement The District shall continue in effect the operations and maintenance of the Jackson Gulch Dam and associated outlet works in accordance with— (i) article 11 of the Contract