Exhibit 4.5

SUPPLEMENTAL INDENTURE NO. 2

SUPPLEMENTAL INDENTURE No. 2 (this “Supplemental Indenture No. 2”), dated as of June 1, 2011, among the entities listed on Schedule I hereto (the “Massey Guarantors”), Alpha Natural Resources, Inc., a Delaware corporation (the “Issuer”), the Guarantors listed on the signature pages to the Supplemental Indenture No. 1 (as defined below) (the “Guarantors”) and Union Bank, N.A., a national banking association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuer and the existing Guarantors have heretofore executed and delivered to the Trustee a base indenture, dated as of June 1, 2011 (as amended, supplemented or otherwise modified from time to time, the “Base Indenture,” and as supplemented by the Supplemental Indenture No. 1., dated as of June 1, 2011, as amended, supplemented or otherwise modified from time to time, the “Supplemental Indenture No. 1” and together with the Base Indenture, the “Indenture”), providing for, inter alia, the issuance of a series of $800,000,000 6% Senior Notes due 2019 (the “2019 Notes”) and a series of $700,000,000 6.25% Senior Notes due 2021 (the “2021 Notes,” and together with the 2019 Notes, the “Notes”);

WHEREAS, Section 4.13 of the Supplemental Indenture No. 1 provides that under certain circumstances the Massey Guarantors shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Massey Guarantors shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantees”); and

WHEREAS, pursuant to Section 8.01 of the Supplemental Indenture No. 1, the Trustee, the Issuer and the existing Guarantors are authorized to execute and deliver this Supplemental Indenture No 2.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Massey Guarantors, the Issuer, the existing Guarantors and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. DEFINED TERMS. Defined terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. AGREEMENT TO GUARANTEE. Each of the Massey Guarantors hereby agrees, jointly and severally with all existing Guarantors, to provide an unconditional Guarantee on the terms and subject to the conditions set forth in Article 9 of the Supplemental Indenture No. 1 and to be bound by all other applicable provisions of the Indenture and the Notes and to perform all of the obligations and agreements of a Guarantor under the Indenture.

3. NO RECOURSE AGAINST OTHERS. A director, manager, officer, employee, incorporator, member or stockholder of the Issuer or any of the Guarantors, as such, will not have any liability for any obligations of the Issuer or the Guarantors under the Notes, the Note Guarantees or the Indenture or for any claim based on, in respect of, or by reason of, such

obligations or their creation. Each Holder by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for the issuance of the Notes.

4. NOTICES. All notices or other communications to the Massey Guarantors shall be given as provided in Section 11.09 of the Supplemental Indenture No. 1.

5. RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURES PART OF INDENTURE. Except as expressly amended hereby, each of the Base Indenture and Supplemental Indenture No. 1 is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture No. 2 shall form a part of the Indenture for all purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby.

6. NEW YORK LAW TO GOVERN. THIS SUPPLEMENTAL INDENTURE NO. 2. AND THE NOTES SHALL EACH BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAW OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

7. DUPLICATE ORIGINALS. The parties may sign any number of copies of this Supplemental Indenture No. 2. Each signed copy shall be an original, but all of them together represent the same agreement. Delivery of an executed counterpart by facsimile shall be effective as delivery of a manually executed counterpart thereof.

8. EFFECT OF HEADINGS. The Section headings in this Supplemental Indenture No. 2 are for convenience only and shall not affect the construction hereof.

9. TRUSTEE MAKES NO REPRESENTATION. The Trustee makes no representation as to the validity or sufficiency of this Supplemental Indenture No. 2.

[Signature pages follow]

SIGNATURES

IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, all as of June 1, 2011.

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

Dated as of June 1, 2011

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]

[Signature Page to Supplemental Indenture No. 2]