Exhibit 3.1

FOURTH AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

U.S. SILICA HOLDINGS, INC.

FIRST: The name of this corporation (the “Corporation”) shall be U.S. Silica Holdings, Inc.

SECOND: Its registered office in the State of Delaware is to be located at 251 Little Falls Drive, Wilmington, New Castle County, Delaware 19808, United States, and the name of its registered agent at such address is the Corporation Service Company.

THIRD: The purpose or purposes of the Corporation shall be to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware (the “DGCL”).

FOURTH: The total number of shares of stock which this Corporation is authorized to issue is 1,000. All such shares are of one class and are shares of Common Stock with the par value of $0.01 per share.

FIFTH: The Board of Directors shall have the power to adopt, amend or repeal the bylaws.

SIXTH: To the fullest extent permitted by the DGCL as it now exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the Corporation to provide broader rights than permitted prior thereto), no director of the Corporation shall be liable to the Corporation or its stockholders for monetary damages arising from a breach of fiduciary duty owed to the Corporation or its stockholders. Any repeal or modification of the foregoing sentence by the stockholders of the Corporation shall not adversely affect any right or protection of a director of the Corporation existing at the time of such repeal or modification with respect to any act, omission or other matter occurring prior to such repeal or modification.

SEVENTH: To the fullest extent permitted by applicable law, the Corporation is authorized to provide indemnification of (and advancement of expenses to) the directors, officers, employees and agents of the Corporation through bylaw provisions, agreements with such directors, officers, employees and agents, vote of stockholders or disinterested directors or otherwise, in excess of the indemnification and advancement otherwise permitted by Section 145 of the DGCL. Any amendment, repeal or modification of the foregoing provisions of this Article Seventh shall not adversely affect any right or protection of a director, officer, employee or agent existing at the time of any acts or omissions of such director, officer, employee or agent occurring prior to such amendment, repeal or modification.