EIGHTH SUPPLEMENTAL INDENTURE

EXHIBIT -4.13

EIGHTH SUPPLEMENTAL INDENTURE

     EIGHTH SUPPLEMENTAL INDENTURE dated as of December 28, 2007 (this “Supplemental Indenture”) among ArcelorMittal Financial Services LLC, a Delaware limited liability company (the “Successor Issuer”), the Guarantors and LASALLE BANK NATIONAL ASSOCIATION, as Trustee (the “Trustee”).

RECITALS

     WHEREAS, Ispat Inland ULC, a Nova Scotia unlimited company (the “Issuer”), the Guarantors and the Trustee have entered into an Indenture dated as of March 25, 2004, as supplemented by the Supplemental Indentures dated as of September 16, 2004, March 14, 2005, December 31, 2005, December 31, 2005, December 31, 2006, September 3, 2007 and November 13, 2007 (as so supplemented, the “Indenture”); and

     WHEREAS, the Successor Issuer desires to assume the obligations of the Issuer under the Indenture as the result of a Permitted Xxxxx Collapse Transaction as provided for in, and permitted by, the Indenture.

     NOW, THEREFORE, each party agrees as follows:

ARTICLE 1

ASSUMPTION OF INDENTURE OBLIGATIONS

     The Successor Issuer, pursuant to paragraph (f) of the definition of “Permitted Xxxxx Collapse Transaction” contained in, and clause (2) of Section 8.01 of, the Indenture, hereby assumes all of the obligations of the Issuer under the Indenture, and the term the “Issuer” as used in the Indenture shall, from and after the date hereof, mean and refer to the Successor Issuer.

ARTICLE 2

MISCELLANEOUS

     SECTION 2.1 This Supplemental Indenture is executed and shall be construed as an indenture supplemental to the Indenture with respect to the Notes and, as provided in the Indenture, this Supplemental Indenture forms a part thereof with respect to the Notes. Except as herein modified, the Indenture is in all respects ratified and confirmed with respect to the Notes and all the terms, provisions and conditions thereof shall be and remain in full force and effect with respect to the Notes and every Holder of Notes shall be bound hereby. Except as expressly otherwise defined, the use of the terms and expressions herein is in accordance with the definitions, uses and constructions contained in the Indenture.

     SECTION 2.2 If any provision of this Supplemental Indenture limits, qualifies or conflicts with any other provision hereof or of the Indenture that is required to be included in the Indenture by any of the provisions of the TIA, such required provision shall control.

     SECTION 2.3 Unless otherwise indicated, capitalized terms used herein without definition shall have the meanings specified therefor in Section 1.01 of the Indenture.

     SECTION 2.4 If any provision of this Supplemental Indenture shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

     SECTION 2.5 This Supplemental Indenture shall be construed in accordance with, and governed by, the laws of the State of New York.

     SECTION 2.6 This Supplemental Indenture may be executed in any number of counterparts, each of which shall be an original but such counterparts shall together constitute but one and the same instrument.

     SECTION 2.7 This Supplemental Indenture shall become effective as of the date first above written.

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     IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to be executed as of the date first above written.

	ARCELORMITTAL FINANCIAL SERVICES LLC, as Successor Issuer
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Manager

	ARCELORMITTAL S.A. (formerly, Mittal Steel Company N.V.), as Guarantor
	By:	/s/ X. Xxxxxx
		Name:	X. Xxxxxx
		Title:

	By:	/s/ Xxxxx Xxxxx
		Name:	Xxxxx Xxxxx
		Title:	Group General Counsel

	ARCELORMITTAL USA INC. (formerly, Mittal Steel USA Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL PARTNERSHIP (formerly, Mittal Steel USA Partnership), as Guarantor
	By:	Mittal Canada Inc., a partner

	By:	/s/ Xxxxxx D’Auteuil
		Name:	Xxxxxx D’Auteuil
		Title:	Treasurer

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	3019693 NOVA SCOTIA U.L.C., as Guarantor
	By:	/s/ Xxxxxx Xxxxx
		Name:	Xxxxxx Xxxxx
		Title:

	ARCELORMITTAL FINANCE LLC (formerly, Mittal Steel USA — Finance LLC), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Manager

	XXXXXXX TRUCKING COMPANY, INC., as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL USA INCOAL INC. (formerly, Incoal Company), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL MINORCA MINE INC. (formerly, Mittal Steel USA — Minorca Mine Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

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	ARCELORMITTAL SERVICE INC. (formerly, Mittal Steel USA Service Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL CLEVELAND INC. (formerly, ISG Cleveland Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL WEIRTON INC. (formerly, ISG Weirton Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL HENNEPIN INC. (formerly, ISG Hennepin Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL INDIANA HARBOR INC. (formerly, ISG Indiana Harbor Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL XXXXXX INC. (formerly, ISG Xxxxxx Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

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	XXXXXXXXXXXXX XXXXXXXXX INC. (formerly, ISG Riverdale Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	MITTAL STEEL USA — VENTURE INC. (formerly, ISG Venture Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL PLATE LLC (formerly, ISG Plate LLC), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ISG SPARROWS POINT LLC, as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL STEELTON LLC (formerly, ISG Steelton LLC), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

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	ARCELORMITTAL LACKAWANNA LLC (formerly, ISG Lackawanna LLC), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL XXXXX HARBOR LLC (formerly, ISG Xxxxx Harbor LLC), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL COLUMBUS LLC (formerly, ISG Columbus Coatings LLC), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL GEORGETOWN INC. (formerly, ISG Georgetown Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	MITTAL STEEL USA — RAILWAYS INC. (formerly, ISG Railways Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL HIBBING INC. (formerly, ISG Hibbing Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

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	HIBBING TACONITE HOLDING INC., as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ISG ACQUISITION INC., as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	ARCELORMITTAL REAL ESTATE INC. (formerly, ISG Real Estate Inc.), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	VP, Finance and Chief Accounting Officer

	ARCELORMITTAL TOW PATH VALLEY BUSINESS PARK DEVELOPMENT COMPANY (formerly, Tow Path Valley Business Park Development Company), as Guarantor
	By:	/s/ Xxxxxx X. XxXxx
		Name:	Xxxxxx X. XxXxx
		Title:	Treasurer

	LASALLE BANK NATIONAL ASSOCIATION, as Trustee
	By:	/s/ Xxxxx X. Xxxxxxx
		Name:	Xxxxx X. Xxxxxxx
		Title:	Assistant Vice President

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