Exhibit 3.9


              MICHIGAN DEPARTMENT OF CONSUMER AND INDUSTRY SERVICES

                                Lansing, Michigan

This is to Certify That

                           MICHIGAN ASH SALES COMPANY

was incorporated on August 3, 1967, as a Michigan profit corporation, and said
corporation is in existence under the laws of this State.

This certificate is issued to attest to the fact that the corporation is in good
standing in this office as of this date and is duly authorized to transact
business or conduct affairs in Michigan and for no other purpose. It is in the
usual form, made by me as the proper officer, and is entitled to have full faith
and credit given it in every court and office within the United States.

                             In testimony whereof, I have hereunto set my hand
                             and affixed the Seal of the Department, in the City
                             of Lansing, this 19th day of February, 1998.


                                                               , Director
                             Corporation, Securities and Land Development Bureau


              MICHIGAN DEPARTMENT OF CONSUMER AND INDUSTRY SERVICES

                                Lansing, Michigan

This is to Certify that the Annexed copy has been compared by me with the record
on file in this Department and that the same is a true copy thereof.

                             In testimony whereof, I have hereunto set my hand
                             and affixed the Seal of the Department, in the City
                             of Lansing, this 19th day of February, 1998.


                                                               , Director
                             Corporation, Securities and Land Development Bureau


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                                STATE OF MICHIGAN
                      CORPORATION AND SECURITIES COMMISSION
                                LANSING, MICHIGAN

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                DO NOT WRITE IN SPACE BELOW -- FOR COMMISSION USE
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                                        Compared by:

     Date Received:
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                                        Date:
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                                        Examiner:
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                            ARTICLES OF INCORPORATION

These Articles of Incorporation are signed and acknowledged by the incorporators
for the purpose of forming a corporation for profit under the provisions of Act
No. 327 of the Public Acts of 1931, as amended, as follows:

                                   ARTICLE I.

The name of the corporation is      MICHIGAN ASH SALES COMPANY
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                                   ARTICLE II.

The purpose or purposes for which the corporation is formed are as follows:

To buy, distribute, market, sell or otherwise dispose of at wholesale or retail,
fly ash materials and compounds, solutions, mixtures, liquids, articles,
materials, chemical supplies, preparations, and substances, of every nature and
description; to buy, sell, lease, and mortgage and deal in personal property or
real estate, in carrying on the business of the company; to own, buy and sell
stock in other corporations, and to invest in mortgages and land contracts.

In general to carry on any business in connection therewith and incident thereto
not forbidden by the laws of the State of Michigan and with all the powers
conferred upon corporation by the laws of the State of Michigan.

                                  ARTICLE III.

Location of the first registered office in:


400 Martin Street,         Bay City         Bay         Michigan      48706
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(No.)    (Street)          (City)           (County)                  (Zip Code)

Postoffice address of the first registered office is:
400 Martin Street,                          Bay City    Michigan      48706
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         (No. and Street or P.O. Box)       (City)                    (Zip Code)
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                                   ARTICLE IV.

The name of the first resident agent is   Jack Wirt
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                                   ARTICLE V.

                       The total authorized capital stock

      (1) _________________________________   _______________________
                                                                      per share
          Common shs.   50,000                Par Value   $1.00
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                                                        -------------
                                                                      per share
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                   --------------------
                                                        -------------
                                                                      per share
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      (3) A statement of all or any of the designation and the powers,
performances and rights, and the qualifications, limitations or restriction
thereof is as follows:

            None

                                   ARTICLE IV.

The names and places of residence or businesses of each of the Incorporators and
the number and class of shares subscribed for each are as follows: (Statute
requires one or more incorporators)

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                                                            Number of Shares
Name                Residence or Business Address
                                                    ----------------------------
                                                         Par Stock
                                                    ----------------------------
   (No.)       (Street)       (City)      (State)
                                                    ----------------------------
                                                      Common
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Jack Wirt, 400 Martin St. Bay City, Michigan          1000
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                                  ARTICLE VII.

The names and addresses of the first board of directors are as follows:

(Statute requires at least three directors)

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          Name                         Residence or Business Address

                             (No.)        (Street)       (City)          (State)
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Jack Wirt                    400 Martin Street, Bay City, Michigan
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Alice Wirt                   400 Martin Street, Bay City, Michigan
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Ralph J. Jackson             201 Phoenix Building, Bay City, Michigan
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                                  ARTICLE VIII.

The term of the corporate existence is perpetual.

(If term is for a limited number of years, then state the number of years
instead of perpetual)


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                                   ARTICLE IX.

Whenever a compromise or arrangement or any plan of reorganization of this
corporation is proposed between this corporation and its creditors of any class
of them and/or between this corporation and its shareholders or any class of
them, any court of equity jurisdiction within the State of Michigan, may on the
application of this corporation or of any creditor or any shareholder thereof,
or on the application of any receiver or receivers appointed for this
corporation, order a meeting of the creditors or class of creditors, and/or of
the shareholders or class of shareholders, as the case may be, to be affected by
the proposed compromise or arrangement or reorganization, to be summoned in such
manner as said court directs. If a majority in number representing three-fourths
in value of the creditors or class of creditors, and/or of the shareholders or
class shareholders, as the case may be, to be affected by the proposal
compromise or arrangement or reorganization, agree to any compromise or
arrangement or to any reorganization of this corporation as a consequence of
such compromise or arrangement, said compromise or arrangement and said
reorganization shall, if sanctioned by the court to which the said application
has been made, be binding on all the creditors or class of creditors, and/or on
all the shareholders or class of shareholder, as the case may be, and also on
this corporation.

                                   ARTICLE X.

     (Here insert any desired additional provisions authorized by the Act.)

We, the incorporators, sign our name this 1st day of August, 1967

   (All parties appearing under Article VI are required to sign in this space)

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Jack Wirt
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STATE OF MICHIGAN )         (One or more of the parties signing must acknowledge
                  ss.               before the Notary)
COUNTY OF BAY     )

On this _____ day of August 1967  before me personally appeared ________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
to me known to be the persons described is and who executed the foregoing
instrument, and acknowledged that they executed the same as their free act and
deed.


                                                 -------------------------------
                                                 (Signature of Notary)

                                                 -------------------------------
                                                 (Print or type name of Notary)

MAIL THREE SIGNED AND ACKNOWLEDGED               Notary Public for Bay  County,
           COPIES TO:                            State of Michigan.

Michigan Corporation & Securities Commission     My commission expires _________
                                                 (Notarial seal required if 
P.O. Box 898      Lansing, Michigan  48904       acknowledgment taken out of 
                                                 State)


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      MICHIGAN DEPARTMENT OF COMMERCE -- CORPORATION AND SECURITIES BUREAU
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(FOR BUREAU USE ONLY)                                      Date Received

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            CERTIFICATE OF AMENDMENT TO THE ARTICLES OF INCORPORATION

                        For use by Domestic Corporations
             (Please read information and instructions on last page)

      Pursuant to the provisions of Act 284, Public Acts of 1972 (profit
corporations), or Act 162, Public Acts of 1982 (nonprofit corporations), the
undersigned corporation executes the following Certificate:

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1. The present name of the corporation is: MICHIGAN ASH SALES COMPANY

2. The corporation identification number (CID) assigned by the Bureau is: 
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   005--309
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3. The location of its registered office is:

      400 Martin                         Bay City        , Michigan       48706
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       (Street)                           (City)                      (Zip Code)
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4. A new Article  X     of the Articles of Incorporation is hereby added to read
   as follows:

                                  See attached.

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                                    Article X

      No director of the Corporation shall be held personally liable to the
Corporation or its shareholders for monetary damages for any breach of fiduciary
duty as a director; provided, however, that this provision does not limit or
eliminate a director's liability for: breaching the duty of loyalty to the
Corporation or its shareholders, failing to act in good faith, engaging in
intentional misconduct, knowingly violating a law, violating Section 551(1) of
the Michigan Business Corporation Act or obtaining an improper personal benefit.
If the Michigan Business Corporation Act is amended to authorize corporate
action further eliminating or limiting the personal liability of directors, then
the liability of a director of the Corporation shall be eliminated or limited to
the fullest extent permitted by the Michigan Business Corporation Act, as so
amended.

      Any repeal or modification of the foregoing paragraph shall not adversely
affect any right or protection of a director of the Corporation existing at the
time of such repeal or modification.


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5.     COMPLETE SECTION (a) IF THE AMENDMENT WAS ADOPTED BY THE UNANIMOUS
       CONSENT OF THE INCORPORATOR(S) BEFORE THE FIRST MEETING OF THE BOARD OF
       DIRECTORS OR TRUSTEES; OTHERWISE, COMPLETE SECTION (b)


a. |_| The foregoing amendment to the Articles of Incorporation was duly adopted
       on the ___ day of ______________, 19__, in accordance with the provisions
       of the Act by the unanimous consent of the incorporator(s) before the
       first meeting of the board of directors or trustees.

       Signed this         day of                                         , 19  
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       ---------------------------------     -----------------------------------
                 (Signature)                            (Signature)

       ---------------------------------     -----------------------------------
             (Type or Print Name)                  (Type or Print Name)


       ---------------------------------     -----------------------------------
                 (Signature)                            (Signature)

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             (Type or Print Name)                  (Type or Print Name)

b. |X| The foregoing amendment to the Articles of Incorporation was duly adopted
       on the 6th day of December, 1991. The amendment: (check one of the
       following)

       |_| was duly adopted in accordance with Section 611(2) of the Act by the
           vote of the shareholders if a profit corporation, or by the vote of
           the shareholders or members if a nonprofit corporation, or by the
           vote of the directors if a nonprofit corporation organized on a
           nonstock directorship basis. The necessary votes were cast in favor
           of the amendment.

       |_| was duly adopted by the written consent of all the directors pursuant
           to Section 525 of the Act and the corporation is a nonprofit
           corporation organized on a nonstock directorship basis.

       |_| was duly adopted by the written consent of the shareholders or
           members having not less than the minimum number of votes required by
           statute in accordance with Section 407(1) and (2) of the Act if a
           nonprofit corporation, and Section 407(1) of the Act if a profit
           corporation. Written notice to shareholders or members who have not
           consented in writing has been given. (Note: Written consent by less
           than all of the shareholders or members is permitted only is such
           provision appears in the Articles of Incorporation.


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       |_| was duly adopted by the written consent of all the shareholders or
           members entitled to vote in accordance with Section 407(3) of the Act
           if a non-profit corporation, and Section 407(2) of the Act is a
           profit corporation.

                                  Signed this 6th day of  December, 1991


                                  By
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                                    (Only signature of: President, 
                                    Vice-President, Chairperson and
                                    Vice-Chairperson)


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                                    (Type or Print Name)   (Type or Print Title)


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