; classify lands as to their mineral and water resources; give engineering supervision to power permittees and Federal Energy Regulatory Commission licensees; administer the minerals exploration program ( 30 U.S.C. 641 ); conduct inquiries into the economic conditions affecting mining and materials processing industries ( 30 U.S.C. 3 , 21a, and 1603; 50 U.S.C. 98g(1) ) and related purposes as authorized by law; and to publish and disseminate data relative to the foregoing activities; $1,167,291,000, to remain available until September 30, 2020; of which $84,337,000 shall remain available until expended for satellite operations; and of which $15,164,000 shall be available until expended for deferred maintenance and capital improvement projects that exceed $100,000 in cost: Provided , That none of the funds provided for the ecosystem research activity shall be used to conduct new surveys on private property, unless specifically authorized in writing by the property owner: Provided further , That no part of this appropriation shall be used to pay more than one-half the cost of topographic mapping or water resources data collection and investigations carried on in cooperation with States and municipalities. Administrative provisions From within the amount appropriated for activities of the United States Geological Survey such sums as are necessary shall be available for contracting for the furnishing of topographic maps and for the making of geophysical or other specialized surveys when it is administratively determined that such procedures are in the public interest; construction and maintenance of necessary buildings and appurtenant facilities; acquisition of lands for gauging stations, observation wells, and seismic equipment; expenses of the United States National Committee for Geological Sciences