Exhibit 10 (i) 90

THIS EXHIBIT CONTAINS CONFIDENTIAL INFORMATION WHICH HAS BEEN REDACTED AND FILED
SEPARATELY WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION.



                          AMENDMENT I TO THE AGREEMENT
                        FOR THE SALE AND PURCHASE OF COAL



            This Amendment  ("Amendment"),  dated as of November 1, 1999 to that
Agreement  ("Agreement") for the sale and purchase of coal made and entered into
as of  the  1st  day  of  April  1999  between  Central  Hudson  Gas &  Electric
Corporation,  (hereinafter  referred to as "Buyer") and Arch Coal Sales Company,
Inc.,  Agent for the  Independent  Operating  Subsidiaries  of Arch Coal,  Inc.,
(hereinafter referred to as "Seller").

                                      WITNESSETH:

           WHEREAS, Article IV of the Agreement provides that beginning July 1,
1999,  Buyer and Seller shall commence good faith  negotiations  with respect to
the price of coal for the next Contract Year; and

           WHEREAS, notice was duly given and Buyer and Seller entered into good
faith negotiations; and

           WHEREAS,  after  completion  of good faith  negotiations,  Buyer and
Seller  desire to amend the  Agreement  to provide  for the  pricing of coal and
certain other Agreement provisions;


            NOW,  THEREFORE,  in  consideration  of the  premises and the mutual
covenants set forth herein, the parties hereto agree as follows:

            ARTICLE III, (SPECIFICATIONS & QUALITY & WEIGHTS), ARTICLE IV (PRICE
& PAYMENT)  AND ARTICLE V  (ADJUSTMENT  IN PRICE FOR  QUALITY) of the  Agreement
shall be  respectively  amended in their  entirety for contract  year 2000.  The
remaining  ARTICLES of the Agreement shall remain in full force and affect.  The
amended ARTICLES shall read as follows:



<PAGE>
CONFIDENTIAL INFORMATION REPRESENTED IN THIS FILING BY AN "X" HAS BEEN REDACTED
AND FILED SEPARATELY WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION.


                                  ARTICLE III
                      SPECIFICATIONS & QUALITY & WEIGHTS
                      ----------------------------------

      Section 1. Origin:  The Primary  Source of coal for  deliveries  hereunder
shall  be from  the  Mingo  Logan  Operations  and  such  coal  shall  meet  the
specifications herein. Coals from other sources shall not be shipped without the
prior written approval of Buyer.

      Section  2.  As  Received  Quality  Specifications:   The  coal  delivered
hereunder  shall  conform  to the  following  Typical  Specifications  on an "as
received"  basis  determined  on a per  Vessel  basis.  The  quality of the coal
delivered by Seller shall be determined in accordance with Article VI.




                               Typical     Minimum     Maximum    ASTM Method
                               -------     -------     -------    -----------
As Received:
  Moisture %                      X                      XX         D 3173
  Volatiles %                     XX         XX          XX         D 3175
  Fixed Carbon %                  XX         XX          XX         D 3172
  Ash %                           X.X        --         X.X         D 3174
  BTU/LB                        XX,XXX     XX,XXX        --         D 3286
  Sulphur %                      X.XX       X.XX        X.XX        D 3177/4239
  SO2 (LBS./MMBTU)               X.XX         --        X.X         Calculated
  Grind (HGI)                     XX         XX (1)      XX         D 409-85
  Ash Fusion (Reducing)
   (I.D., Deg. F)               X,XXX      X,XXX         --         D1587
  Coal Fines:
     (A)  1/4" Round Hole         --         --          XX%        D4749
     (B) 35 Mesh U.S. Standard    --         --          XX%        D4749

(1) Subject to approval by Buyer.


                                       2
<PAGE>
CONFIDENTIAL INFORMATION REPRESENTED IN THIS FILING BY AN "X" HAS BEEN REDACTED
AND FILED SEPARATELY WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION.

THIS COAL SHALL BE FREE OF EXTRANEOUS MATERIAL AND SHALL HAVE A MAXIMUM TOP SIZE
OF TWO INCHES.

(A)   Coal defined as zero times one quarter inch round hole.
(B)   Coal fines defined as zero by 0.5 mm (35 mesh U.S. Standard sieve or 32
      mesh Tyler sieve).

      Section 3. Buyer's Remedies Related to Quality Specifications:  In lieu of
any  other   remedies   related  to   Seller's   failure  to  meet  the  quality
specifications provided for in Section 2 above, except for the price adjustments
for quality  provided  for in Article V herein,  Buyer shall have the rights and
remedies  described in this Section 3 upon  Seller's  failure to deliver coal in
accordance with the specifications set forth in Section 2 of this Article III.

         Buyer's ability to use the coal being dependent on the coal meeting the
specifications  set forth above, it is agreed that Buyer shall have the right to
reject any and all shipments  which fail to meet any of the individual  shipment
as received rejection limits shown below:

              INDIVIDUAL SHIPMENT REJECTION LIMITS (As Received)
              --------------------------------------------------

      Sulphur (By Weight)                             X.X%   Maximum
      Volatiles                                         XX%  Minimum
      Ash %                                              X%  Maximum
      Ash Fusion (I.D. - Degrees F)                    X,XXX Minimum(1)
      Grind (HGI)                                        XX  Minimum
      Gross Calorific Value (BTU/LB)                  XX,XXX Minimum
      SO2/Million BTU                               X.X LBS. Maximum

      (1) Lower value subject to approval by Buyer.

                                      3

<PAGE>




      Seller  shall pay all  freight,  diversion,  demurrage,  testing and other
expenses in connection with any such rejected shipment, or shipments found to be
nonconforming,  unless such shipment is accepted by Buyer.  Furthermore,  Seller
certifies  that it will not make any shipment shown by sampling and analyses (as
provided in Article VI) to exceed the individual shipment rejection limits.

      Section 4. Seller's  Duty of Care:  Seller  shall,  at all times  exercise
reasonable  care  and  diligence  in its  efforts  to ship to Buyer  coal  which
conforms to the  specifications as set forth above in Section 2. Nothing in this
Article III shall be construed to relieve  Seller of its  obligation  to conduct
its mining and operations in a competent  manner,  consistent with good industry
practices, so as to produce coal which will meet the specifications as set forth
in Section 2 above.

      Section 5. Weights: For rail/water deliveries,  The Seller shall submit to
Buyer the certified rail weights  provided by the origin carrier within five (5)
working days after the certified weights become available.

      For water  only  deliveries,  the weight of coal sold  hereunder  shall be
determined by an Independent  Marine Survey(s) of the Vessel at the Load Port or
by Independent Marine Survey(s) at Buyer's Discharge Port if Seller's Vessel has
multiple Discharge Ports. The Buyer, Seller or their Agents reserve the right to
witness any or all Marine Surveys.


                                      4

<PAGE>
CONFIDENTIAL INFORMATION REPRESENTED IN THIS FILING BY AN "X" HAS BEEN REDACTED
AND FILED SEPARATELY WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION.



                                  ARTICLE IV
                               PRICE AND PAYMENT

      Section  1.  Price:  The  Base  Price  of the Firm  cargoes  of coal  sold
hereunder  is fixed at $ XX.XX per short ton DES Roseton  Dock.  Option  Cargoes
will be priced in accordance with ARTICLE II, Section 1.

      Section 2. Price  Reopener:  On or before July 1st 2000,  Buyer and Seller
will enter into negotiations to fix the Base Price for coal delivered  hereunder
for the ensuing year. Unless otherwise agreed,  this Agreement will terminate on
December 31, 2000 if negotiations for the following year have not been completed
by October 31st.

      Submission of Analysis: In addition to Seller's notifications provided for
in Article II,  Section 3, Seller shall submit to Buyer the  analytical  data on
said shipments from the Operations as obtained by the Independent Laboratory for
each shipment within five days after each shipment.

      Section  3.  Invoice:  An  invoice  for any  adjustments  for  quality  as
hereinafter  defined,  and all coal shipped from the Operations based on weights
determined  in  accordance  with  Article III Section 5 will be submitted by the
Seller to the Buyer.  The coal  shipped will be invoiced at the Price as defined
in ARTICLE IV, Section 1.


                                      5

<PAGE>



   Section 4. Taxes: All taxes due on cargo in U.S.A. upon transfer of title per
Incoterms (1990) are for Buyer's account.

    Section 5. Vessel Costs: All usual and customary Vessel costs, including but
not limited to docking, are for the account of the Seller (i.e., pilots, tugs).

      Section 6. Payment:  Buyer shall make payment to Seller within thirty (30)
calendar  days from vessel Bill of Lading  Date.  There shall be no discount for
early payment.  Payments due on a Saturday shall be made on the prior Friday and
those due on a Sunday shall be made on the following  Monday.  Payments due on a
Holiday shall be made on the following week day.

      Payment  shall be made by wire transfer as directed by Seller upon written
notice to Buyer.


                                      6

<PAGE>
CONFIDENTIAL INFORMATION REPRESENTED IN THIS FILING BY AN "X" HAS BEEN REDACTED
AND FILED SEPARATELY WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION.


                                   ARTICLE V
                        ADJUSTMENT IN PRICE FOR QUALITY

      Section 1. BTU Value (Gross  Calorific  Value As Received Basis - BTU/LB):
The Price to be paid to Seller by Buyer is based  upon coal with  XX,XXX  BTU/LB
heat  content  (BTU  Value) for each net ton of coal in each  shipment.  The BTU
Value of the coal sold  hereunder may vary, and the Price for such coal shall be
adjusted to compensate for variations in BTU Value, as described below.

      Section 2. Adjustment for BTU Value: If the BTU Value of the coal shipment
is  between  XX,XXX  BTU/LB  and  XX,XXX  BTU/LB  (inclusive),  there will be no
adjustment for BTU Value variation.  If the BTU Value is less than XX,XXX BTU/LB
or greater than XX,XXX BTU/LB, the Price for a shipment shall be adjusted, based
upon variations from the XX,XXX BTU/LB BTU Value, as follows:

      [a] For a coal  shipment with a BTU Value  greater than XX,XXX  BTU/LB,  a
premium  shall be paid by Buyer to Seller  at the rate of $X.XX per 100  BTU/LB,
fractions pro rata above XX,XXX BTU/LB;

      [b] For a coal  shipment  with a BTU Value  less than  XX,XXX  BTU/LB  but
greater than XX,XXX  BTU/LB,  a penalty  shall be deducted from the Price at the
rate of $X.XX per 100 BTU/LB, fractions pro rata below XX,XXX BTU/LB;

      [c] For a coal  shipment  with a BTU Value  less than  XX,XXX  BTU/LB  but
greater than XX,XXX  BTU/LB,  a penalty  shall be deducted from the Price at the
rate of $ X.XX per 100 BTU/LB, fractions pro rata below XX,XXX BTU/LB.


      Section 3.  Adjustments  for Ash Value:  The Price to be paid to Seller by
Buyer is based upon coal with an ash content  (Ash Value) of XXXXX  percent (X%)
by weight of the "as received" analysis of the coal. If the Ash Value is between
X.XX% and X.XX% there will be no adjustment  for Ash Value.  If the Ash Value is
less than  X.XX% then a premium of $.XX per ton shall be paid to Seller for each
0.X% Ash Value  variation below X.X%. If the Ash Value is greater than X.XX% but
equal to or less than X% then a penalty of $.XX per ton shall be  deducted  from
the  Price  for each X.X% Ash Value  variation  in excess of X.X%.  The  maximum
premium/penalty shall be $ X.XX per ton.



                                      7
<PAGE>





            IN WITNESS  WHEREOF,  each Party hereto has caused this Agreement to
be executed in its behalf by its proper officer thereunder duly authorized,  all
as of the day and year first above written.


BUYER:      CENTRAL HUDSON GAS & ELECTRIC CORPORATION

BY                 /s/ Arthur R. Upright
               ------------------------------------

                       Arthur R. Upright

ITS Senior Vice President-Regulatory Affairs, Financial Planning And Accounting



SELLER:     ARCH COAL SALES COMPANY, INC.

 BY                 /s/ John W. Eaves
               ------------------------------------
                       John W. Eaves


ITS             President of Arch Coal Sales Company, Inc.
               --------------------------------------------




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