Exhibit 5.1

June 21, 2006

VeraSun Energy Corporation
100 22nd Avenue
Brookings, South Dakota 57006

RE: 9 7/8% SENIOR SECURED NOTES DUE 2012

We have acted as counsel to VeraSun Energy Corporation, a South Dakota
corporation (the "COMPANY"), in connection with the registration by the Company
under the Securities Act of 1933 (the "ACT") of $210,000,000 aggregate principal
amount of 9 7/8 % Senior Secured Notes due 2012 (the "NOTES") which are to be
issued under an Indenture, dated as of December 21, 2005, as supplemented on May
4, 2006 (the "INDENTURE"), between the Company, as issuer, VeraSun Aurora
Corporation, VeraSun Fort Dodge, LLC, VeraSun Charles City, LLC, VeraSun
Marketing, LLC and VeraSun Welcome, LLC, as Subsidiary Guarantors, and Wells
Fargo, N.A., as Trustee.

We have reviewed the corporate action of the Company in connection with this
matter and have examined the documents, corporate records and other instruments
we deemed necessary for the purposes of this opinion. As to all factual matters
material to the opinions expressed herein, we have (with your permission and
without any investigation or independent verification) relied upon and assumed
the accuracy and completeness of the representations, warranties and covenants
contained in the Notes, the Indenture and the Purchase Agreement dated December
14, 2005 between the Company, Lehman Brothers Inc. and Morgan Stanley & Co.
Incorporated. We have also assumed that the parties to the Notes and the
Indenture will act in accordance with, and will refrain from taking any action
that is forbidden by, the terms and conditions of the Notes and the Indenture.

In connection with this opinion, we have, with your consent and without
investigation or independent verification, assumed the following with respect to
the Notes and the other documents and instruments examined by us, other than
with respect to the Company: (a) the Notes, the Indenture and the other
documents and instruments examined by us have been or will be duly authorized,
authenticated, executed, delivered and, as appropriate, acknowledged by the
parties thereto and constitute or will constitute the legal, valid and binding
obligation of those parties, enforceable against them in accordance with the
terms thereof; (b) all signatures are genuine, all documents and instruments
submitted to us as originals are authentic and all documents and instruments
submitted to us as photocopies, telecopies or facsimiles or in



VeraSun Energy Corporation
June 21, 2006
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electronic form conform to the original documents and instruments; and (c) the
parties to the Notes, the Indenture and the other documents and instruments
examined by us are and will be duly formed entities and are and will be duly
qualified to transact business in all states where formation and qualification
are necessary, and those parties have all necessary power and authority to enter
into and perform the obligations under the Notes, the Indenture and the other
documents and instruments examined by us.

Based solely upon the foregoing and subject to the comments, qualifications and
other matters set forth herein, we are of the opinion that when the Registration
Statement filed by the Company with the Securities and Exchange Commission
("SEC") under the Act (the "REGISTRATION STATEMENT") has become effective under
the Act, and the Notes have been issued and sold as provided for in the
Registration Statement, the Notes will constitute legal, valid and binding
obligations of the Company enforceable against the Company in accordance with
their terms.

The opinions expressed herein are limited by, subject to and based upon the
following:

     A. BANKRUPTCY, ETC. The Notes and the Indenture may be limited, affected or
rendered unenforceable by bankruptcy, insolvency, reorganization, fraudulent
transfer, moratorium or other statutes or rules of law affecting creditors'
rights generally, including, without limitation, statutes or rules of law that
(i) limit the effect of waivers of rights by a debtor, (ii) affect obligations
undertaken by a subsidiary entity for the benefit of a parent or other related
entity, and (iii) relate to deficiency judgments.

     B. EQUITABLE PRINCIPLES AND REMEDIES. The Notes and the Indenture are
subject to general principles of equity (whether considered in a proceeding in
equity or at law), including without limitation, concepts of materiality,
reasonableness, good faith and fair dealing, and to the discretion of the court
before which any proceeding therefor may be brought, and to public policy
considerations. Certain remedies, waivers and other provisions of the Notes and
the Indenture may be limited, affected or rendered unenforceable by applicable
law and judicial decisions; however, such law and decisions should not render
the Notes invalid as a whole or preclude the judicial enforcement of the
obligation of the Company to repay the principal, together with interest
thereon, as provided in the Notes (to the extent not deemed a penalty).

Our opinions are limited in all respects to the internal laws of the state of
New York, and we express no opinion with respect to the applicability thereto,
or the effect thereon, of the laws of any other jurisdiction, or as to any
matters of municipal law or the laws of any local agencies within any state.



VeraSun Energy Corporation
June 21, 2006
Page 3


This letter is our opinion as to certain legal conclusions as specifically set
forth herein and is not and should not be deemed to be a representation or
opinion as to any factual matters. We hereby consent to the filing of this
opinion as Exhibit 5.1 to the Registration Statement and to the reference to us
under the caption "Legal Matters" in the prospectus forming a part of the
Registration Statement. In giving this consent, we do not admit that we are
within the category of persons whose consent is required by Section 7 of the
Act, or the rules and regulations promulgated by the SEC thereunder.

Very truly yours,

/s/ STOEL RIVES LLP

Stoel Rives LLP