USG CORP
11-K, 1998-03-31
CONCRETE, GYPSUM & PLASTER PRODUCTS
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                SECURITIES AND EXCHANGE COMMISSION


                     Washington, D.C.  20549



                            FORM 11-K

                          ANNUAL REPORT


                Pursuant to Section 15(d) of the
                 Securities Exchange Act of 1934


(Mark one)


  X    Annual Report pursuant to 15(d) of the Securities Exchange
- -----
Act of 1934 (Fee required)

   For the fiscal year ended December 31, 1997.

                                OR

       Transition report pursuant to Section 15(d) of the
- -----
Securities Exchange Act of 1934 (No fee required)

   For the transition period from                 to


                         Commission file number 1-8864.

   A.  Full title of the Plan:

                  USG CORPORATION INVESTMENT PLAN (Formerly USG
               CORPORATION INVESTMENT PLAN FOR SALARIED EMPLOYEES)


   B. Name of the issuer of the  securities  held  pursuant  to the plan and the
address of its principal executive office:

              USG CORPORATION, 125 SOUTH FRANKLIN STREET, CHICAGO,
                                 ILLINOIS 60606

<PAGE>

                       REQUIRED INFORMATION


Financial Statements:

Plan  financial  statements  and  schedules  prepared  in  accordance  with  the
financial reporting  requirements of ERISA attached hereto,  including a Consent
of Independent Public Auditors with respect to Form S-8 for 1997.


Pursuant to the  requirements  of the  Securities  and Exchange Act of 1934, the
members of the Pension and Investment Committee administering the Plan have duly
caused  this  annual  report  to be  signed by the  undersigned  thereunto  duly
authorized.


                              USG CORPORATION INVESTMENT PLAN



                              By: /s/ Harold E. Pendexter, Jr.
                              --------------------------------
                              H. E. Pendexter, Jr.,
                              Member of Pension and Investment
                              Committee


Date: March 14, 1998
<PAGE>













                                 USG CORPORATION
                                 INVESTMENT PLAN


                                REPORT ON AUDITED
                            FINANCIAL STATEMENTS AND
                             SUPPLEMENTAL SCHEDULES


                     YEARS ENDED DECEMBER 31, 1997 AND 1996


<TABLE>

                                TABLE OF CONTENTS


                                      PAGE
<CAPTION>
<S>                                                             <C>
  INDEPENDENT AUDITORS' REPORT                                   1

  FINANCIAL STATEMENTS:

     Statement of Net Assets Available
       for Plan Benefits                                         2

     Statement of Changes in Net Assets
       Available for Plan Benefits                               4

     Notes to Financial Statements                               6


  SUPPLEMENTAL SCHEDULES:

      I.  Schedule of Investments Held
            at Year End                                         13

     II.  Schedule of Reportable Transactions                   14
</TABLE>
<PAGE>
MEMBER OF THE                                                   MEMBER OF THE
ILLINOIS CPA                                                 AMERICAN INSTITUTE
SOCIETY                                                        OF CERTIFIED

                               PUBLIC ACCOUNTANTS
                                Hill, Taylor LLC
                          CERTIFIED PUBLIC ACCOUNTANTS
                     116 South Michigan Avenue - 11th Floor
                             Chicago, Illinois 60603
                                  312-332-4964
                                Fax: 312-332-0181

                          INDEPENDENT AUDITORS' REPORT

PENSION AND INVESTMENT COMMITTEE
USG CORPORATION


We have  audited the  accompanying  statement of net assets  available  for plan
benefits of the USG  Corporation  Investment  Plan as of  December  31, 1997 and
1996,  and the related  statement  of changes in net assets  available  for plan
benefits  for  the  years  then  ended.  These  financial   statements  are  the
responsibility  of the Plan's  management.  Our  responsibility is to express an
opinion on these statements based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management as well as evaluating the overall financial  statement  presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects, the net assets available for plan benefits of the Plan as
of December 31, 1997 and 1996, and the changes in net assets  available for plan
benefits  for the  years  then  ended  in  conformity  with  generally  accepted
accounting principles.

Our  audits  were  made for the  purpose  of  forming  an  opinion  on the basic
financial statements taken as a whole. The supplemental schedules of investments
held at year end as of December 31, 1997,  and reportable  transactions  for the
year ended  December 31, 1997,  are presented for purposes of complying with the
Department of Labor's Rules and Regulations  for Reporting and Disclosure  under
the Employee  Retirement Income Security Act of 1974 and are not a required part
of  the  basic  financial  statements.  The  supplemental  schedules  have  been
subjected  to the  auditing  procedures  applied  in  the  audits  of the  basic
financial  statements  and, in our  opinion,  are fairly  stated in all material
respects in relation to the basic financial statements taken as a whole.


March 23, 1998
<PAGE>
<TABLE>


                                                                     USG CORPORATION INVESTMENT PLAN
                                                          STATEMENT OF NET ASSETS AVAILABLE FOR PLAN BENEFITS
                                                                       DECEMBER 31, 1997 AND 1996


                                                                                  1997
                                          ------------------------------------------------------------------------------------------


                                                USG COMMON                  STABLE                  GOVERNMENT
                                                  STOCK                     VALUE                   INVESTMENT
                                                   FUND                      FUND                      FUND
                                          -----------------------   -----------------------    ----------------------
<S>                                                  <C>                      <C>                              <C>
ASSETS:
   Investments at
      Market                                         $29,734,432              $121,189,170                       ---
  262,606,745

   Receivables:
      Employer contributions
         receivable                                    1,234,871                 4,309,048                       ---
      Employee loans
         receivable                                          ---                       ---                       ---
      Employee contributions
         receivable                                          ---                       ---                       ---


    Interest and
        dividend receivable                                7,687                    34,171                       ---

    Pending transactions due
        to loan repayments                                   ---                       (38)                      ---


                                          -----------------------   -----------------------    ----------------------

    Total Receivables                                  1,242,558                 4,343,181                       ---
                                          -----------------------   -----------------------    ----------------------

  Total Assets                                        30,976,990               125,532,351                       ---
                                          -----------------------   -----------------------    ----------------------


LIABILITIES:



      Accrued Administrative
           Fees                                            3,837                    24,167                       ---

                                          -----------------------   -----------------------    ----------------------


  Total Liabilities                                        3,837                    24,167                       ---
                                          -----------------------   -----------------------    ----------------------

NET ASSETS AVAILABLE
  FOR PLAN BENEFITS                                  $30,973,153              $125,508,184                       ---
                                          =======================   =======================    ======================
</TABLE>
<TABLE>

        EQUITY                                                                       SMALL CAP               INTERNATIONAL
        INDEX                    BALANCED                   GROWTH                     EQUITY                    EQUITY
         FUND                      FUND                      FUND                       FUND                      FUND
- -----------------------   -----------------------    ----------------------    -----------------------   -----------------------
           <S>                       <C>                       <C>                         <C>                       <C>


           $49,954,109               $17,415,648               $32,629,299                 $5,692,313                $2,907,015




             2,304,557                   847,104                 2,110,024                    358,813                   182,162

                   ---                       ---                       ---                        ---                       ---

                   ---                       ---                       ---                        ---                       ---



                   ---                       ---                       ---                        ---                       ---


                    (8)                      ---                       ---                     13,683                       ---


- -----------------------   -----------------------    ----------------------    -----------------------   -----------------------

             2,304,549                   847,104                 2,110,024                    372,496                   182,162
- -----------------------   -----------------------    ----------------------    -----------------------   -----------------------

            52,258,658                18,262,752                34,739,323                  6,064,809                 3,089,177
- -----------------------   -----------------------    ----------------------    -----------------------   -----------------------







                 6,665                     2,341                     4,496                        776                       396

- -----------------------   -----------------------    ----------------------    -----------------------   -----------------------


                 6,665                     2,341                     4,496                        776                       396
- -----------------------   -----------------------    ----------------------    -----------------------   -----------------------


           $52,251,993               $18,260,411               $34,734,827                 $6,064,033                $3,088,781
=======================   =======================    ======================    =======================   =======================
</TABLE>
<TABLE>
                                 FORFEITURE                INVESTMENT
         BOND                      & CASH                     PLAN
         FUND                     ACCOUNT                    LOANS                     TOTAL
 ----------------------    -----------------------   -----------------------    ---------------------
            <S>                          <C>                   <C>                      <C>


            $2,586,322                   $498,437    $                  ---             $262,606,745




                79,881                   (350,000)                      ---               11,076,460

                   ---                        ---                13,799,534               13,799,534

                   ---                    150,707                       ---                  150,707



                11,699                      3,416                       ---                   56,973


                   ---                        ---                   (13,637)                     ---


 ----------------------    -----------------------   -----------------------    ---------------------

                91,580                   (195,877)               13,785,897               25,083,674
 ----------------------    -----------------------   -----------------------    ---------------------

             2,677,902                    302,560                13,785,897              287,690,419
 ----------------------    -----------------------   -----------------------    ---------------------







                   316                     60,780                       ---                  103,774

 ----------------------    -----------------------   -----------------------    ---------------------


                   316                     60,780                       ---                  103,774
 ----------------------    -----------------------   -----------------------    ---------------------


            $2,677,586                   $241,780               $13,785,897             $287,586,645
 ======================    =======================   =======================    =====================
</TABLE>
The  accompanying  notes to financial  statements  are an integral part of these
statements.
<PAGE>
<TABLE>


                                                          USG CORPORATION INVESTMENT PLAN

                                                STATEMENT OF NET ASSETS AVAILABLE FOR PLAN BENEFITS
                                                            DECEMBER 31, 1997 AND 1996


                                                                         1996
- ----------------------------------------------------------------------------------------------------------------------------

                                    USG COMMON         FIXED             GOVERNMENT          EQUITY
                                      STOCK            INCOME            INVESTMENT           INDEX             BALANCED
                                       FUND             FUND                FUND              FUND                FUND
                                  --------------   -------------         ------------     -----------        -------------
<CAPTION>
<S>                                 <C>             <C>                   <C>             <C>                 <C>
ASSETS:
   Investments at
      Market                        $19,185,797     $122,884,255          $4,666,089      $32,485,092         $12,295,698

   Receivables:
      Employer contributions
         receivable                        ---         7,960,213                 ---              ---                 ---
      Employee loans
         receivable                        ---               ---                 ---              ---                 ---


    Interest and
        dividend receivable                 70           195,452              20,227                5                  25

      Pending transactions
         from participants'
         elections for transfers
         between funds or
         forfeitures                       ---               ---             111,679          431,678             194,274
                                                                             -------          -------             -------

    Total Receivables                       70         8,155,665             131,906          431,683             194,299
                                            --         ---------             -------          -------             -------

  Total Assets                      19,185,867       131,039,920           4,797,995       32,916,775          12,489,997
                                    ----------       -----------           ---------       ----------          ----------


LIABILITIES:

      Pending transactions
         from participants'
         elections for transfers
         between funds or
          forfeitures                  554,236         1,422,440                 ---              ---                 ---
                                       -------         ---------


  Total Liabilities                    554,236         1,422,440                 ---              ---                 ---
                                       -------         ---------

NET ASSETS AVAILABLE
  FOR PLAN BENEFITS                $18,631,631      $129,617,480          $4,797,995       $32,916,775        $12,489,997
                                   ===========      ============          ==========       ===========        ===========
</TABLE>
<TABLE>

- -------------------------------------------------------------------

                    FORFEITURE        INVESTMENT
      GROWTH          CASH              PLAN
       FUND          ACCOUNT            LOANS               TOTAL
   ------------     -----------     -------------      ------------

   <S>               <C>            <C>                <C>


   $20,394,899       $154,061       $        ---       $212,065,891



           ---       (114,318)               ---          7,845,895

           ---            ---          7,840,092          7,840,092



             3            704                ---            216,486





      1,271,645        29,143                ---          2,038,419
      ---------        ------                             ---------

      1,271,648       (84,471)         7,840,092         17,940,892
      ---------       -------          ---------         ----------

     21,666,547        69,590          7,840,092        230,006,783
     ----------        ------          ---------        -----------








            ---           ---            697,912          2,674,588
                                         -------          ---------


            ---           ---            697,912          2,674,588
                                         -------          ---------


    $21,666,547       $69,590         $7,840,092       $227,332,195
    ===========       =======         ==========       ============

</TABLE>

The  accompanying  notes to financial  statements  are an integral part of these
statements.
<TABLE>



                                                  USG CORPORATION INVESTMENT PLAN

                                       STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS
                                              YEARS ENDED DECEMBER 31, 1997 AND 1996
- ------------------------------------------------------------------------------------------------------------------------------------

                                                                1997


                                        USG COMMON                  STABLE              GOVERNMENT                 EQUITY
                                          STOCK                      VALUE              INVESTMENT                 INDEX
                                           FUND                      FUND                  FUND                     FUND
                                           ----                      ----                  ----                     ----
<CAPTION>
<S>                                     <C>                    <C>                      <C>                    <C>
NET ASSETS AVAILABLE
  FOR PLAN BENEFITS,
    beginning of year                   $18,631,631            $129,617,480             $4,797,995             $32,916,775
                                        -----------            ------------             ----------             -----------

ADD (DEDUCT):
Corporation contributions                 1,398,324               7,271,245                    ---               2,661,254

Employee contributions                    2,318,484               8,686,104                255,572               4,547,491
                                          ---------               ---------                -------               ---------
                                          3,716,808              15,957,349                255,572               7,208,745
                                          ---------              ----------                -------               ---------

Income from investments:
  Dividend income                              ---                      ---                    ---               1,077,313
  Interest income                           39,948                7,640,952                119,041                     156
  Realized gain (loss) on
    sale of investments                  (6,243,322)                    ---                    ---               1,997,354
  Unrealized appreciation
    for the year                         14,736,995                     ---                    ---               8,598,712
                                         ----------                                                              ---------
                                          8,533,621               7,640,952                119,041              11,673,535
                                          ---------               ---------                -------              ----------

Benefit payments and
  participant withdrawals                  (887,421)             (9,282,155)              (163,334)             (1,725,328)

Participants' elections for
  transfers between funds
  or forfeitures                          1,224,705             (13,227,162)            (5,029,568)              2,713,611

Net fund transactions                      (227,047)             (5,055,099)                20,294                (499,609)
  due to loans

Administrative expenses                     (19,144)               (143,181)                   ---                 (35,736)
                                            -------                --------                                        -------

Net increase in
  assets during the year                 12,341,522              (4,109,296)            (4,797,995)             19,335,218
                                         ----------              ----------             ----------              ----------

NET ASSETS AVAILABLE
  FOR PLAN BENEFITS,
  end of year                           $30,973,153             $125,508,184                   ---             $52,251,993
                                        ===========             ============                                   ===========
</TABLE>
<TABLE>




                                                SMALL CAP                INTERNATIONAL                               FORFEITURE
      BALANCED                 GROWTH            EQUITY                     EQUITY                   BOND               CASH
        FUND                     FUND              FUND                       FUND                   FUND              ACCOUNT
        ----                     ----              ----                       ----                   ----              -------

    <S>                     <C>                 <C>                       <C>                    <C>                  <C>


    $12,489,997             $21,666,547                 ---                      ---                    ---              $69,590
    -----------             -----------                                                                                  -------


        975,838               2,447,597             406,637                  207,461                 85,896             (350,000)

      1,777,307               4,527,844             307,799                  163,543                 40,361                  ---
      ---------               ---------             -------                  -------                 ------
      2,753,145               6,975,441             714,436                  371,004                126,257             (350,000)
      ---------               ---------             -------                  -------                -------             --------


      1,383,387               2,423,257             243,301                  318,159                113,909                  ---
            489                     149                 ---                        1                     12               26,663

        338,031                 897,796              32,151                  (36,009)                 5,986                  --- 

      1,303,551               2,692,456            (271,521)                (470,957)               (27,803)                 ---
      ---------               ---------            --------                 --------                -------
      3,025,458               6,013,658               3,931                 (188,806)                92,104               26,663
      ---------               ---------               -----                 --------                 ------               ------


       (877,034)             (1,199,424)            (37,806)                 (24,679)                (8,568)             (28,952)



        977,761               1,568,768           5,423,697                2,963,455              2,475,697              909,036

        (96,160)               (266,530)            (36,655)                 (30,154)                (6,672)            (241,898)


        (12,756)                (23,633)             (3,570)                  (2,039)                (1,232)            (142,659)
        -------                 -------              ------                   ------                 ------             --------


      5,770,414              13,068,280           6,064,033                3,088,781              2,677,586              172,190
      ---------              ----------           ---------                ---------              ---------              -------



    $18,260,411             $34,734,827          $6,064,033               $3,088,781             $2,677,586             $241,780
    ===========             ===========          ==========               ==========             ==========             ========
</TABLE>
<TABLE>


    INVESTMENT
      PLAN
      LOANS                   TOTAL
      -----                   -----

    <S>                   <C>


    $7,142,180            $227,332,195
    ----------            ------------


           ---              15,104,252

           ---              22,624,505
                            ----------
           ---              37,728,757
                            ----------


           ---               5,559,326
       566,254               8,393,665

           ---              (3,008,013

           ---              26,561,433
                            ----------
       566,254              37,506,411
       -------              ----------


      (362,067)            (14,596,768



           ---                    ---

     6,439,530                    ---


           ---               (383,950)
                             --------


     6,643,717             60,254,450
     ---------             ----------



   $13,785,897           $287,586,645
   ===========           ============
</TABLE>
The  accompanying  notes to financial  statements  are an integral part of these
statements.
<TABLE>


                                                      USG CORPORATION INVESTMENT PLAN

                                        STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS
                                                  YEARS ENDED DECEMBER 31, 1997 AND 1996


                                                                    1996
- ------------------------------------------------------------------------------------------------------------------------------------

                                         USG COMMON                FIXED                 GOVERNMENT              EQUITY
                                           STOCK                   INCOME                INVESTMENT              INDEX
                                            FUND                    FUND                    FUND                  FUND
<CAPTION>
<S>                                     <C>                     <C>                     <C>                     <C>   
NET ASSETS AVAILABLE
  FOR PLAN BENEFITS,
  beginning of year                     $15,757,656             $123,960,139            $4,388,498              $22,841,934
                                        -----------             ------------            ----------              -----------

ADD (DEDUCT):
Corporation contributions                       ---               11,859,525                   ---                      ---

Employee contributions                    2,142,189                8,635,407               507,642                3,073,532
                                          ---------                ---------               -------                ---------
                                          2,142,189               20,494,932               507,642                3,073,532
                                          ---------               ----------               -------                ---------

Income from investments:
  Dividend income                               ---                      ---                   ---                  600,693
  Interest income                             1,698                7,325,085               234,013                      665
  Realized gain (loss) on
    sale of investments                  (2,078,354)                     ---                   ---                  808,159
  Unrealized depreciation
    for the year                          4,338,774                      ---                   ---                4,260,634
                                          ---------                                                               ---------
                                          2,262,118                7,325,085               234,013                5,670,151
                                          ---------                ---------               -------                ---------

Benefit payments and
  participant withdrawals                  (996,138)             (13,205,907)             (315,855)              (2,036,392)

Participants' elections for
  transfers between funds
  or forfeitures                           (813,112)              (7,691,826)              (35,878)               3,198,440

Net fund transactions                       278,918               (1,264,943)               19,575                  169,110
  due to loans

Administrative expenses                         ---                      ---                   ---                      ---


Net increase in
  assets during the year                  2,873,975                5,657,341               409,497               10,074,841
                                          ---------                ---------               -------               ----------

NET ASSETS AVAILABLE
  FOR PLAN BENEFITS,
  end of year                           $18,631,631             $129,617,480            $4,797,995              $32,916,775
                                        ===========             ============            ==========              ===========
</TABLE>
<TABLE>


                                                     FORFEITURE         INVESTMENT
     BALANCED                  GROWTH                  & CASH              PLAN
       FUND                     FUND                   ACCOUNT             LOANS                   TOTAL
       ----                     ----                   -------             -----                   -----
<CAPTION>
    <S>                     <C>                        <C>              <C>                     <C>  

    $9,150,249              $12,484,278                 $90,882         $6,351,744              $195,025,380
    ----------              -----------                 -------         ----------              ------------


           ---                     ---                 (206,658)               ---                11,652,867

      1,462,446               2,652,956                     ---                ---                18,474,172
      ---------               ---------                                                           ----------
      1,462,446               2,652,956                (206,658)               ---                30,127,039
      ---------               ---------                --------                                   ----------


        384,991                 148,113                     ---                ---                 1,133,797
          1,296                     679                   4,083            490,824                 8,058,343

      1,015,612                 755,115                     ---                  1                   500,533

        114,503               2,651,167                      (1)                (1)               11,365,076
        -------               ---------                      --                 --                ----------
      1,516,402               3,555,074                   4,082            490,824                21,057,749
      ---------               ---------                   -----            -------                ----------


       (994,371)               (954,476)                    250           (339,239)              (18,842,128)



      1,357,547               3,767,950                 216,879                ---                       ---

         (2,276)                160,765                     ---            638,851                       ---


            ---                     ---                 (35,845)               ---                   (35,845)
                                                        -------                                      -------


      3,339,748               9,182,269                 (21,292)           790,436                32,306,815
      ---------               ---------                 -------            -------                ----------



    $12,489,997             $21,666,547                 $69,590         $7,142,180              $227,332,195
    ===========             ===========                 =======         ==========              ============
</TABLE>

The  accompanying  notes to financial  statements  are an integral part of these
statements.
<PAGE>



                                 USG CORPORATION
                                 INVESTMENT PLAN

                          NOTES TO FINANCIAL STATEMENTS
                           DECEMBER 31, 1997 AND 1996



1.  DESCRIPTION OF THE PLAN

The  USG  Corporation  Investment  Plan,  also  known  as  the  USG  Corporation
Investment  Plan for Salaried  Employees  prior to January 1, 1989 ("The Plan"),
was approved by the  stockholders of the Corporation on May 11, 1977, and became
effective  on July 1, 1977.  The Plan was  subsequently  amended and  completely
restated  effective  as of January 1, 1989 and most  recently as of July 1, 1997
("restated  Plan").  The  amendments  and  restatements  incorporate  all  prior
amendments  to the  Plan and make  changes  to  reflect  the  merger  of the USG
Corporation Savings Plan for Hourly Employees and change the name of the Plan to
the USG Corporation Investment Plan, effective January 1, 1989; and to implement
the daily valuation of investments in the participants'  accounts at fair market
value on each business day effective July 1, 1997.

The Plan was  established  to provide a means for  eligible  hourly and salaried
employees  to  participate  in the  earnings  of the  Corporation,  to  build  a
supplemental  retirement  fund and to provide  additional  disability  and death
benefits.

The Plan provides,  among other things,  that  participants may contribute up to
12% (9% for highly  compensated  employees)  of their  eligible  pay to the Plan
through payroll  deductions on a before-tax basis during the year effective July
1, 1997,  9% from January 1, 1989 to June 30, 1997,  15% from October 1, 1985 to
December 31, 1988 and 12% prior to October 15, 1985. The amount of distributions
to be made upon withdrawal from the Plan is dependent upon the participant's and
the Corporation's  contributions.  The Plan requires completion of five years of
credited  service in order to be 100%  vested in the  Corporation  contribution.
Employee  contributions are always 100% vested.  In addition,  the Plan contains
provisions under which the entire amount credited to a participant's  account is
distributable upon a participant's retirement, disability, or death.

Employee  contributions  are invested by the Trustee in any one or a combination
of eight funds: (a) common stock of USG Corporation (USG Common Stock Fund), (b)
an equity  index fund which  provides  investment  results  that are designed to
correspond to the performance of publicly  traded common stocks,  as represented
by the Standard & Poor's 500  Composite  Stock Price Index  (Equity Index Fund),
(C) a balanced fund which invests in several broadly  diversified asset classes,
including domestic and foreign common stock and bonds, preferred stocks and cash
(Balanced Fund), (d) a growth fund which invests  primarily in equity securities
of large market capitalization companies with earnings that are expected to grow
at an  above-average  rate,  but may be further  diversified  by investment of a
small portion of the assets in domestic bonds,  foreign common stocks and bonds,
and cash  (Growth  Fund),  (e) a small  cap  equity  fund  which  seeks  maximum
long-term growth of capital by investing in common stock of rapidly growing U.S.
companies  with  market  capitalization  of less than $1  billion at the time of
initial  investment  (Small Cap Equity Fund), (f) an  international  equity fund
which seeks long-term capital  appreciation  through investments in common stock
of established non-U.S.  companies  (International Equity Fund), (g) a bond fund
which seeks to provide  current income and  preservation of capital by investing
in investment grade corporate debt securities, government bonds and mortgages in
both U.S. and foreign  markets,  (Bond Fund) or (h) a managed  separate  account
which seeks to preserve  principal and income while maximizing current income by
investing in a  diversified  pool of  Guaranteed  Investment  Contracts  (GICs),
separate account GICs, synthetic GICs or Structured  Investment Contracts (SICs)
and Bank Investment Contracts (BICs) of varying maturity, size and yield (Stable
Value Fund).

Effective July 1, 1997, the Stable Value Fund replaced the Fixed Income Fund and
the Government  Investment Fund. All existing  balances in the Fixed Income Fund
and the Government  Investment Fund were transferred to the Stable Value Fund on
July 1, 1997.

The Equity Index Fund is invested in the Vanguard Institutional Index Fund.

The Balanced Fund is invested in the Fidelity Puritan Fund.

The Growth Fund is invested in the American Express/IDS New Dimensions Fund.

The Small Cap Equity Fund is invested  in the  Franklin  Small Cap Growth Fund -
Class 1.

The International  Equity Fund is invested in the Templeton Foreign Fund - Class
1.

The Bond Fund is invested in the PIMCO Total Return Fund Institutional Class.

The Stable Value Fund is managed by PRIMCO Capital  Management.  At December 31,
1997,  the Stable Value Fund (Fixed Income Fund in 1996) was primarily  composed
of group annuity contracts maintained by Aetna Life & Casualty Company,  Bankers
Trust,  Commonwealth  Life Insurance  Company,  Jackson  National Life Insurance
Company,  Allstate Insurance Company, John Hancock Mutual Life Insurance Company
and SunAmerica Life Insurance Company.

Participants may elect to have their contributions  invested in 1% increments in
any fund or combination of funds and to change their  contribution rate, suspend
or resume their  contributions,  change their investment  allocations,  transfer
their  investments  from one fund to another and apply for a loan by calling the
USG Investment Plan  Connection,  an automated  telephone  service,  on any day.
Certain Executive  officers of the Corporation must pre-clear any transfer in or
out of the USG Common Stock Fund with the USG Corporate Secretary.

     The Corporation made a regular 25% matching contribution up to the first 6%
of the  participants'  eligible  pay  contributed  to the Plan,  credited to the
participants' accounts each pay period.In addition, the Corporation also made an
annual profit sharing  matching  contribution  of up to 9% of the  participants'
eligible pay contributed to the Plan based on achievement of at least 80% of the
corporate consolidated earnings goal for the plan year.


If the Trustee is unable to invest any contributions immediately,  the funds are
temporarily invested in short-term investment funds and any earnings in the fund
are credited to the participants' accounts.

The Plan funds are  administered  under the terms of a Trust  agreement with The
Northern Trust Company.  The Trust agreement provides,  among other things, that
the Trustee shall keep account of all  investments,  receipts and  disbursements
and other  transactions  and shall provide  annually a report setting forth such
transactions and the status of the funds at the end of the period.

The Plan is administered by the Pension and Investment Committee, which consists
of six members appointed by the Corporation.  Administrative  expenses and other
fees of the Plan are shared by the Corporation and the participants.

At  December  31,  1997 and  1996,  there  were  approximately  9,013  and 9,430
participants in the Plan, respectively.


2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The amounts in the accompanying  statements were accumulated from the reports of
the Trustee  (Note 1). The  statements  are  prepared  on the  accrual  basis of
accounting.  Contributions  to  the  Plan  are  made  throughout  the  year  and
adjustments  are made to the  statements  to accrue  for the  portion  of annual
contributions unpaid at year-end.

All  investments  of the Plan are  valued  at  market.  Unrealized  appreciation
(depreciation) of investments of the Plan represents the change between years in
the difference between the market value and cost of the investments.

Realized  gains or losses on the sale of investments  are calculated  based upon
the historical average cost of the investments.  Market value and cost are equal
for the group annuity contract and short-term investments.

The preparation of financial  statements in conformity  with generally  accepted
accounting  principles  requires the plan  administrator  to make  estimates and
assumptions that affect certain  reported amounts and disclosures.  Accordingly,
actual results may differ from those estimates.

The guaranteed  investment  contracts in the Stable Value Fund earned guaranteed
interest at rates  varying from 5.66% to 6.80% at December  31, 1997.  The rates
for 1996  ranged  from  5.75% to  7.20%.  The  guaranteed  investment  contracts
earnings are calculated net of administrative fees.

For the USG Common  Stock  Fund,  cost was  $47,478,648  and  $53,327,934  as of
December  31, 1997 and 1996,  respectively.  For the Equity  Index Fund,  market
value  exceeded cost by  $17,800,155  and  $9,201,443 at December 31, 1997,  and
1996,  respectively.  For the  Balanced  Fund,  market  value  exceeded  cost by
$1,990,111  and $686,560 at December 31, 1997, and 1996,  respectively.  For the
Growth Fund, market value exceeded cost by $6,897,431 and $4,204,977 at December
31, 1997 and 1996, respectively.  Cost exceeded market value by $271,521 for the
Small Cap Equity Fund,  $470,957 for the International  Equity Fund, and $27,803
for the Bond Fund,  at December  31,  1997,  respectively.  The Small Cap Equity
Fund, International Equity Fund and the Bond Fund were introduced to the Plan on
July 1, 1997.

Pending  transactions due to loan repayments  represent loan repayments received
from participants by the Trustee before year-end. In order to present the proper
balance of net assets in each fund at year-end,  a net receivable or payable was
used to record  such  pending  transactions  and are  shown on the  accompanying
statement of net assets available for plan benefits.

The net  amount  of  transfers  in or out of  each  fund  during  the  year  for
participants'  elections for transfers  between funds and net loan  transactions
for the funding of new loans and  repayments on existing  loans are shown on the
accompanying statement of changes in net assets available for plan benefits.


3. TAX STATUS

The  Plan,  as  amended  and  restated,   effective  July  1,  1997,  meets  the
requirements of Section 401 (a) of the Internal  Revenue Code and,  accordingly,
its income is exempt from  Federal  income tax under  Section 501 (a).  Employer
contributions  and the income of the Plan are not  taxable  to the  participants
until distributions are made.


4. EMPLOYER CONTRIBUTIONS

The Corporation will make a formula matching  contribution  with respect to each
eligible  participant  only if at least  80% of the  Corporation's  consolidated
earnings goal is met.

The Corporation formula matching  contribution schedule was changed for the 1995
Plan year.  Beginning  January 1, 1995, each 1% increase in goal attainment from
80% to 100% of goal  results  in a  corresponding  1.5%  increase  in the profit
sharing  match,  starting at a 10% match with the  attainment of 80% of earnings
goal.  Each 1% increase in goal attainment from 100% to 140% of goal will result
in a 1% increase in the profit  sharing  match,  starting  from a 40% match with
attainment  of 100% of goal  earnings.  And each 1% increase in goal  attainment
above 140% results in a 2% increase in the profit sharing  match,  starting from
80% matching with attainment of 140% of goal earnings.

Employer contribution amounts forfeited by terminated employees are applied as a
credit  against future  Corporate  contributions  or used to pay  administrative
expenses and other fees of the plan and are held in the Forfeiture Cash Account.


5. DISTRIBUTION ON TERMINATION OF THE PLAN

In the  event of any  termination  of the  Plan,  the  account  balances  of all
affected participants shall become non-forfeitable.



6. INVESTMENTS

The following is a summary of the Plan's investments as well as the net realized
and unrealized appreciation (depreciation) for 1997 and 1996:
<TABLE>

                      December 31, 1997              DECEMBER 31, 1996
                  -------------------------     ----------------------
INVESTMENTS AT
FAIR VALUE                          NET                           NET
DETERMINED BY                   APPRECIATION                  APPRECIATION
QUOTED MARKET        FAIR       (DEPRECIATION)       FAIR      (DEPRECIATION)
PRICE:               VALUE      IN FAIR VALUE       VALUE      IN FAIR VALUE
<CAPTION>
<S>               <C>           <C>             <C>           <C>
USG Common
  Stock           $28,148,393   $  8,493,673    $19,120,158   $  2,260,420
Vanguard Index
  Trust            49,954,109     10,596,066     32,478,696      5,068,792
Fidelity Puritan
  Fund             17,415,648      1,641,582     12,256,681      1,130,115
IDS New Dimension
  Fund             32,629,299      3,590,252     20,388,050      3,406,282
Franklin Small Cap
  Growth Fund       5,692,313     (  239,370)        ---             ---
Templeton Foreign
  Fund              2,907,015     (  506,966)        ---             ---
PIMCO Total Return
  Fund              2,586,297     (   21,817)        ---             ---
                  -----------     -----------    -----------    -----------

SUB-TOTAL         139,333,074     23,553,420     84,243,585     11,865,609
                  -----------     -----------    -----------    -----------
</TABLE>
<TABLE>

INVESTMENTS AT
FAIR VALUE
DETERMINED BY
OTHER THAN
QUOTED MARKET
PRICE:
<CAPTION>
<S>              <C>           <C>            <C>             <C>
Mortgages,
  Notes,
  Contracts       116,977,010         ---        79,511,775          ---
Collective
  Short-Term
  Investment
  Fund              6,296,661         ---        48,310,531          ---
                 ------------   ------------   ------------    ---------

SUB-TOTAL         123,273,671         ---       127,822,306          ---
                 ------------   ------------   ------------    ---------

TOTAL
INVESTMENTS      $262,606,745   $ 23,553,420   $212,065,891   $ 11,865,609
                 ============   =============  ============   ============
</TABLE>

At December 31, 1997 and 1996, the following  investments exceeded 5% of the net
assets available for the Plan benefits:
<TABLE>

                                     1997                 1996
                                 ------------         --------
<CAPTION>
<S>                              <C>                  <C>
USG Corporation Common Stock     $28,148,393          $19,120,158

Allstate Insurance Company
  Contract 77032                  22,953,629                -

Jackson National Life Insurance
  Contract S-1129-1               23,438,942                -

SunAmerica Life Insurance
  Company, GAC 4653               22,070,890                -

SunAmerica Life
 Insurance Company, GAC 6317           -               20,630,854

Metropolitan Life Insurance
  Company, GAC 13908                   -               16,141,476

Provident Life Insurance
  Company, GAC 627-05701               -               23,754,071

Vanguard Index Trust              49,954,109           32,478,696

IDS New Dimension Fund            32,629,299           20,388,050

Fidelity Puritan Fund             17,415,648           12,256,681

Collective Short Term
  Investment Fund                  6,296,661           48,310,531
</TABLE>


7. PARTICIPANT LOANS

Effective  October 1, 1993,  and as revised on July 1, 1997, a  participant  can
obtain loans from the Plan. Under the Plan's loan  provisions,  the maximum loan
allowable  is one half of a  participant's  vested  account  balance or $50,000,
whichever is less. The minimum loan amount is $1,000.  Additional amounts can be
taken in $1 increments.  A participant  must have a vested account balance of at
least  $2,000  before  he or she can apply for a loan.  The Plan  restricts  the
participant to no more than two loans  outstanding at a time.  Most loans can be
repaid by the  participant  over a five year period,  or sooner,  in full,  with
interest  at the  prime  rate in effect at the time of  requesting  the loan.  A
residential  loan can be repaid  over a period of up to 30 years.  Default  on a
loan by a  participant  is treated as a hardship  withdrawal  and subject to IRS
penalties.
<TABLE>
                                   SCHEDULE I
                                 USG CORPORATION
                                 INVESTMENT PLAN

                    SCHEDULE OF INVESTMENTS HELD AT YEAR END
                                DECEMBER 31, 1997


                                    PRINCIPAL
                                AMOUNT/NUMBER OF                        FAIR
                                     SHARES              COST           VALUE
COMMON STOCK
<CAPTION>
<S>                               <C>               <C>             <C>
   USG Corporation                      574,457     $ 47,478,648    $ 28,148,393
   Vanguard Index Trust                 557,773       32,153,954      49,954,109
   Fidelity Puritan Fund                898,640       15,425,537      17,415,648
   IDS New Dimension Fund             1,367,417       25,731,868      32,629,299
   Franklin Small Cap
        Growth Fund                     248,247        5,963,834       5,692,313
   Templeton Foreign Fund               292,162        3,377,972       2,907,015
                                      ---------      -----------     -----------

      TOTAL COMMON STOCK                             130,131,813     136,746,777
                                                     -----------    ------------

CORPORATE BONDS

   PIMCO Total Return Fund              243,990        2,614,100       2,586,297
                                      ---------      -----------     -----------

CONTRACTS

   Aetna Life & Casualty
     Company,  GAC 14603           $  3,057,537        3,057,537       3,057,537
   Bankers Trust, GAC 97-157       $  6,159,129        6,159,129       6,159,129
   Commonwealth Life Insurance
     Company, GAC ADA00259TR       $ 10,817,416       10,817,416      10,817,416
   Jackson National Insurance
     Company, GAC 1125             $  6,702,513        6,702,513       6,702,513
   John Hancock Mutual Life
     Insurance Co., GAC 8396-1     $  6,056,133        6,056,133       6,056,133
   John Hancock Mutual Life
     Insurance Co., GAC 9532       $ 10,674,426       10,674,426      10,674,426
   John Hancock Mutual Life
     Insurance Co., GAC 8396       $  5,046,395        5,046,395       5,046,395
   SunAmerica Life Insurance
     Company, GAC 4653             $ 22,070,890       22,070,890      22,070,890
   Allstate Insurance Company
     Contract 77032                $ 22,953,629       22,953,629      22,953,629
   Jackson National Insurance Co.
     Contract S-1129-1             $ 23,438,942       23,438,942      23,438,942
                                   ------------      -----------     -----------

      TOTAL CONTRACTS              $116,977,010      116,977,010     116,977,010
                                   ------------      -----------     -----------

SHORT-TERM INVESTMENTS

   Collective Short-Term
     Investment Fund              $   6,296,661        6,296,661       6,296,661
                                   ------------      -----------     -----------


      TOTAL INVESTMENTS                             $256,019,584    $262,606,745
                                                    ============    ============
</TABLE>
<TABLE>

                                 USG CORPORATION
                                 INVESTMENT PLAN


                       SCHEDULE OF REPORTABLE TRANSACTIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1997



SERIES OF TRANSACTIONS IN THE SAME SECURITY:


                     TOTAL         COST        TOTAL       CURRENT
  DESCRIPTION OF   NUMBER OF        OF       NUMBER OF     VALUE OF
     SECURITY      PURCHASES       ASSET       SALES        SALES
<CAPTION>
<S>                      <C>    <C>             <C>     <C>
SunAmerica Life
 Insurance Co.
    GAC 4653             7      22,070,890       1      $21,503,056

Allstate Insurance
    Contract 77032       8      25,246,458      21        2,292,829

Jackson National
 Insurance Co.
  Contract S-1129-1      8      25,439,785       9        2,000,843

Metropolitan Life
 Insurance Co.
    GAC 13908            -           -           1       16,615,657

Provident Life
 Insurance Co.
    GAC 627-05701        -           -           1       24,408,803
</TABLE>




                     CONSENT OF INDEPENDENT PUBLIC AUDITORS

                            WITH RESPECT TO FORM S-8




As  independent  public  auditors,  we hereby  consent to the  incorporation  by
reference of our report,  dated March 23, 1998, appearing in the USG Corporation
Investment Plan Annual Report on Form 11-K for the year ended December 31, 1997,
into USG  Corporation's  previously filed  Registration  Statements No. 2-94787,
33-63554  and 33- 9948 on Form S-8. It should be noted that we have not examined
any financial statements of the Investment Plan subsequent to December 31, 1997,
or performed any audit procedures subsequent to the date of our report.



/S/ Hill & Taylor LLC
- ---------------------
Chicago, Illinois
March 23, 1998


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