That agency of the U. S. Department of the Interior created by Executive Order effective 16 July 1946 and superseding the General Land office in administering the general land-laws, with supervision of the subdivisional survey, and disposal of title to the public lands of the United States, and of the leasing, grants of right-of-way, and other surficial uses thereof, including all rights incident to the extraction of minerals; coal, phosphates, potash, oil, and gas on the public lands; withdrawals for irrigation, dams, and reservoirs, and for grazing and settlement rights of every description.