Exhibit 5.1
[Letterhead of Steven R. Sullivan]
| May 15, 2009 |
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Ameren Corporation |
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1901 Chouteau Avenue |
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St. Louis, Missouri 63103 |
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Ladies and Gentlemen:
I am Senior Vice President, General Counsel and Secretary of Ameren Corporation, a Missouri corporation (the “Company”). The Company has filed with the Securities and Exchange Commission (the “Commission”) a Registration Statement on Form S-3 (Registration No. 333-155416) (the “Registration Statement”) under the Securities Act of 1933, as amended (the “Securities Act”), with respect to an indeterminate amount of securities, which became effective on November 17, 2008. On May 15, 2009, the Company issued and sold $425,000,000 of its 8.875% Senior Notes due 2014 (the “Notes”) pursuant to an indenture dated as of December 1, 2001 between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (as amended and supplemented, the “Indenture”).
In connection with the issuance and sale of the Notes by the Company, I have reviewed originals (or copies certified or otherwise identified to my satisfaction) of the Registration Statement (including the exhibits thereto), the Restated Articles of Incorporation, as amended, and By-Laws of the Company as in effect on the date hereof, the Indenture, a specimen of the Notes, corporate and other documents, records and papers and certificates of public officials. In connection with such review, I have assumed the genuineness of all signatures, the legal capacity of natural persons, the conformity to the originals of the documents submitted to me as certified or photostatic copies, the authenticity of the originals of such documents and all documents submitted to me as originals and the correctness of all statements of fact contained in such original documents. I am a member of the Bar of the State of Missouri and, for purposes of this opinion, do not hold myself out as an expert on the laws of any jurisdiction other than the State of Missouri.
On the basis of such review, I am of the opinion that the Notes have been legally issued by the Company and are the valid and binding obligations of the Company, subject to bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other similar laws affecting creditors’ rights, to general equitable principles (whether considered in a proceeding in equity or at law) and to an implied covenant of reasonableness, good faith and fair dealing.
I hereby consent to the filing of this opinion as an exhibit to the Company’s Current Report on Form 8-K filed on May 15, 2009, which is incorporated by reference in the Registration Statement.
| Very truly yours, |
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| /s/ Steven R. Sullivan |
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| Steven R. Sullivan |
| Senior Vice President, General Counsel and Secretary |
Signature Page to Sullivan Exhibit 5 Opinion
