114 STAT. 2763A-292 PUBLIC LAW 106-554—APPENDIX D "(A) $6,500,000 to carry out recreational projects; and "(B) an additional $25,000,000 to carry out section 11; to remain available until expended. "(3) RECREATIONAL PROJECTS.—Of the funds authorized under paragraph (2) for recreational projects, up to $1,500,000 may be used to fund a wetland interpretive center in the State of North Dakota. " (4) OPERATION AND MAINTENANCE. — "(A) IN GENERAL. —There are authorized to be appropriated such sums as are necessary for operation and maintenance of the unit (including the mitigation and enhancement features). "(B) AUTHORIZATION LIMITS.— Expenditures for operation and maintenance of features substantially completed and features constructed before the date of enactment of the Dakota Water Resources Act of 2000, including funds expended for such purposes since the date of enactment of Public Law 99-294, shall not be counted against the authorization limits in this section. "(5) MITIGATION AND ENHANCEMENT LAND.—On or about the date on which the features authorized by section 8(a) are operational, a separate account in the Natural Resources Trust authorized by section 11 shall be established for operation and maintenance of the mitigation and enhancement land associated with the unit."; and (4) by striking subsection (e) and inserting the following: "(e) INDEXING. —The $200,000,000 amount under subsection (b)(1)(B), the $200,000,000 amount under subsection (a)(1)(B), and the funds authorized under subsection (b)(2) shall be indexed as necessary to allow for ordinary fluctuations of construction costs incurred after the date of enactment of the Dakota Water Resources Act of 2000 as indicated by engineering cost indices applicable for the type of construction involved. All other authorized cost ceilings shall remain unchanged.". SEC. 611. NATURAL RESOURCES TRUST. Section 11 of Public Law 89-108 (100 Stat. 424) is amended— (1) by striking subsection (a) and inserting the following: "(a) CONTRIBUTION.— " (1) INITIAL AUTHORIZATION.— "(A) IN GENERAL. —From the sums appropriated under section 10 for the Garrison Diversion Unit, the Secretary shall make an annual Federal contribution to a Natural Resources Trust established by non-Federal interests in accordance with subsection (b) and operated in accordance with subsection (c). "(B) AMOUNT.— The total amount of Federal contributions under subparagraph (A) shall not exceed $12,000,000. " (2) ADDITIONAL AUTHORIZATION. — "(A) IN GENERAL. —In addition to the amount authorized in paragraph (1), the Secretary shall make annual Federal contributions to the Natural Resources Trust until the amount authorized by section 10(c)(2)(B) is reached, in the manner stated in subparagraph (B). "(B) ANNUAL AMOUNT.— The amount of the contribution under subparagraph (A) for each fiscal year shall be the
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