Exhibit 5.1


                            Pillsbury Winthrop LLP
                            One Battery Park Plaza
                           New York, New York 10004



                                 May 10, 2001



Better Minerals & Aggregates Company
U.S. Silica Company
BMAC Services Co., Inc.
Better Materials Corporation
BMC Trucking, Inc.
Chippewa Farms Corporation
George F. Pettinos, Inc.
Ottawa Silica Company
Pennsylvania Glass Sand Corporation
The Fulton Land and Timber Company
Stone Materials Company, LLC
Commercial Aggregates Transportation and Sales, LLC

c/o Better Minerals & Aggregates Company
Route 522 North, P.O. Box 187
Berkeley Springs, West Virginia  25411

Ladies and Gentlemen:

     We have acted as counsel to Better Minerals & Aggregates Company, a
Delaware corporation (the "Company"), U.S. Silica Company, BMAC Services Co.,
Inc., BMC Trucking, Inc., George F. Pettinos, Inc., Ottawa Silica Company and
Pennsylvania Glass Sand Corporation, each a Delaware corporation, Better
Materials Corporation, Chippewa Farms Corporation, The Fulton Land and Timber
Company, each a Pennsylvania corporation, and Stone Materials Company, LLC and
Commercial Aggregates Transportation and Sales, LLC, each a Delaware limited
liability company (individually, a "Guarantor" and, collectively, the
"Guarantors") in connection with the Registration Statement on Form S-1, as
amended (the "Registration Statement"), filed by the Company and the Guarantors
with the Securities and Exchange Commission (the "Commission") under the
Securities Act of 1933 (the "Act").


     The prospectus that is a part of the Registration Statement will only be
used by Chase Securities Inc., the Company's affiliate, in connection with
offers and sales related to market-making transactions of an indeterminate
amount of the Company's 13% Senior Subordinated Notes due 2009 (the "Notes") and
the related guarantees of the Notes by the Guarantors (individually, a
"Guarantee" and, collectively, the "Guarantees").  The Notes and the Guarantees
have been issued pursuant to an Indenture dated as of October 1, 1999 (as
amended and supplemented, the "Indenture") among the Company, the Guarantors and
The Bank of New York, as trustee.

     In our capacity as such counsel, we have reviewed the Indenture, the form
of the Notes, the Registration Statement and such other corporate records,
agreements, documents and other instruments of the Company and the Guarantors,
and satisfied ourselves as to such other matters, as we have deemed necessary or
appropriate as a basis for this opinion. In such review, we have assumed the
genuineness of all signatures, the legal capacity of natural persons, the
authenticity of all documents submitted to us as originals, the conformity to
the originals of all documents submitted to us as certified, conformed or
photostatic copies and the authenticity of the originals of such latter
documents. We have assumed that each of the Company and the Guarantors is
validly existing and in good standing under the laws of its respective
jurisdiction of organization.

     Based on the foregoing, and subject to the qualifications, assumptions and
limitations stated herein, we are of the opinion that (i) the Notes constitute
the valid and legally binding obligations of the Company and (ii) the Guarantees
constitute the valid and legally binding obligations of the Guarantors.

     We are members of the Bar of the State of New York and, for purposes of
this opinion, do not hold ourselves out as experts on the law of any
jurisdiction other than the law of the State of New York and the Delaware
General Corporation Law. This opinion is limited to matters governed by the law
of the State of New York and the Delaware General Corporation Law (including the
statutory provisions of the Delaware General Corporation Law and also all
applicable provisions of the Delaware Constitution and reported decisions
interpreting the Delaware General Corporation Law and the Delaware
Constitution).

     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to this firm under the heading
"Legal Matters" in the prospectus that is a part of the Registration Statement.
In giving this consent, we do not thereby admit that we are within the category
of persons whose consent is required under Section 7 of the Act or the rules and
regulations of the Commission thereunder.


                              Very truly yours,

                              /s/ Pillsbury Winthrop LLP

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