104 STAT. 4570 PUBLIC LAW 101-631—NOV. 28, 1990 Mineral resources. Watersheds. (6) given the relative environmental and other values of the lands proposed for exchange in this Act, the land exchange set forth herein is clearly in the public interest and represents the land acquisition strategy that best meets dual public objectives of acquiring the Spearfish Canyon and other South Dakota properties, while at the same time minimizing or eliminating cash outlays by the United States to achieve such objectives. (b) PURPOSE.—It is the purpose of this Act to authorize, direct, and expedite the consummation of the interstate land exchange and transfer set forth herein in order to further the public interest by acquiring lands in South Dakota with important values for permanent public management and protection and to transfer certain lands to non-Federal ownership in Summit County, Colorado. SEC. 2. SOUTH DAKOTA-COLORADO LAND EXCHANGE. (a) IN GENERAL.—If Homestake enters into an exchange agreement with the Secretary of Agriculture, the Secretary shall exchange lands with Homestake as set forth in this Act. (b) CONVEYANCE BY HOMESTAKE.— Except as otherwise provided in this subsection, Homestake shall convey to the Secretary of Agriculture all right, title and interest of Homestake in certain lands in Lawrence and Meade Counties, South Dakota, that comprise approximately twelve thousand two hundred and seventy-four acres. Such lands include approximately 1,250 acres of riparian lands in Spearfish Canyon that encompass some 20 miles of stream frontage on Spearfish Creek, and are generally depicted on maps entitled "Forest Service-Homestake Land Exchange—South Dakota Lands to Forest Service", numbered A-H, and dated February 1990. In making such conveyance Homestake shall retain: (1) All mineral rights in the above described lands owned, held or controlled by Homestake as of the date of enactment of this Act, except that— (A) any future exercise of such mineral rights shall be subject to the provisions of 36 CFR 251-15 in effect on the date of enactment of this Act pertaining to surface and other use of lands conveyed to the Secretary of Agriculture where mineral rights are reserved; and (B) that with respect to mineral rights retained in the approximately 1,250 acres of riparian lands within the watershed of Spearfish Canyon, any exploration and development of such rights shall be limited to methods and activities that do not disturb the surface of such lands. If such rights are ever proposed for exploration and development, the Secretary shall provide Homestake with such access or permits on, through, or under National Forest lands including, but not limited to permits for drilling, tunnels, air shafts, surface vents and other activities incidental to exploration or underground mining operations adjacent to such riparian lands as will reasonably permit exploration and development of the mineral rights without surface disturbance of such riparian lands or impairment of the values of Spearfish Canyon as set forth in this Act. (2) All water rights within the watershed of Spearfish Creek and its tributaries owned, held or controlled by Homestake as of the date of enactment of this Act and shall exercise such rights in accordance with applicable Federal, State, and local law and in accordance with any subsequent cooperative agreements or
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