1 Exhibit 3.11 ARTICLES OF INCORPORATION OF BRONCO MINING COMPANY, INC. I. The undersigned agree to become a corporation by the name of: BRONCO MINING COMPANY, INC. II. The address of the principal office of said corporation will be located at Kingswood P. O. Box #306, in county of Preston and State of West Virginia, 26537. III. The purpose or purposes for which this corporation is formed are as follows: (a) To engage in the general business of mining and to do all things incident thereto; (b) To purchase, lease or otherwise acquire, to hold, and to sell, lease or otherwise dispose of real property, mines, mineral and mining rights, oil and gas wells, oil and gas royalties, and interests of any nature in all of the foregoing, whether in the United States of America or elsewhere; (c) To mine, drill for and otherwise extract coal, oil, gas, metals, ores and minerals and to otherwise acquire, produce, prepare for market, process, store, transport, sell and deal in the same and the products and by-products thereof; 2 (d) To operate and conduct mines, wells and mining and drilling operations; (e) To acquire, construct, operate, maintain and dispose of lands, factories, works, facilities, machinery, equipment and buildings of whatever nature; (f) To carry on the business of consulting, advising and managing mining and drilling operations; (g) To engage in the transaction of any or all other lawful business for which corporations may be incorporated under the corporation laws of the State of West Virginia, as the same may be from time to time amended; (h) To enter into and participate in one or more joint ventures with individuals or corporations to carry out the objects, purposes and powers of the Corporation; (i) To do all things necessary, convenient or incident to the accomplishment of the foregoing objects, purposes and powers. IV. Provisions limiting or denying to shareholders preemptive rights are: None. V. Provisions for the regulation of the internal affairs of the corporation are: None. 2 3 VI. The amount of the total authorized capital stock of said corporation shall be 5,000 dollars, which shall be divided into 500 shares of the par value of 10 dollars each. VII. The full names and addresses of the incorporator(s), including street and street numbers, if any, and the city, town or village, including ZIP number: NAME ADDRESS ---- ------- Mark R. Joseph 1114 Avenue of the Americas New York, New York 10036 VIII. The existence of this corporation is to be perpetual. IX. The name and address of the person appointed to whom shall be sent notice or process served upon, or service of which is accepted by, the secretary of state is W. M. WOODROE, CHARLESTON NATIONAL PLAZA, CHARLESTON, WEST VIRGINIA 25301. X. The number of directors constituting the initial board of directors of the corporation is four, and the names and addresses of the persons, if any, who are to serve as directors until the first annual meeting of shareholders or until their successors are elected and shall qualify are: NAME ADDRESS ---- ------- Mark R. Joseph 1114 Avenue of the Americas New York, N.Y. 10036 Lars Garrison 1114 Avenue of the Americas New York, N.Y. 10036 3 4 Joop van Eck Vasteland 4 Rotterdam, Netherlands William Rottier Vasteland 4 Rotterdam, Netherlands I, THE UNDERSIGNED, for the purpose of forming a Corporation under the laws of the State of West Virginia, do make and file this ARTICLES OF INCORPORATION, and we have according hereunto set our respective hands this 3rd day of October, 1975. /s/ Mark R. Joseph ---------------------- Articles of Incorporation prepared by: Coudert Brothers 200 Park Avenue New York, NY 10017 4 5 STATE OF NEW YORK ) ) SS: COUNTY OF NEW YORK ) I, Ruta Lacis, a Notary Public in and for the County and State aforesaid, hereby certify that: /s/ Mark R. Joseph ------------------------- whose names are signed to the foregoing Articles, bearing date on the 3rd day of October, 1975, this day personally appeared before me in my said county and severally acknowledged their signatures to the same. Given under my hand and the official seal this 3rd day of October, 1975. /s/ Ruta Lacis -------------------------- Notary Public (NOTARIAL SEAL) RUTA LACIS NOTARY PUBLIC, State of New York No. 24-4525102 Qualified in Kings County My Commission expires: Commission Expires March 30, 1976 5