BLACK HILLS CORP
8-K, 1994-09-02
ELECTRIC SERVICES
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                   SECURITIES AND EXCHANGE COMMISSION

                         Washington, D. C. 20549



                                 Form 8-K



                              CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of
                    THE SECURITIES EXCHANGE ACT OF 1934


                  Date of Report:  September 2, 1994





                          BLACK HILLS CORPORATION



State of South Dakota       File Number 1-7978       IRS Number 46-0111677





                               625 Ninth Street
                        Rapid City, South Dakota  57709



                 Registrant's telephone number (605) 348-1700


<PAGE>
Item 5.     Other Events

     On August 24, 1994, the Board of Directors of Black Hills Corporation
("Company") authorized the issuance and sale in an underwritten public
offering of an aggregate of $45,000,000 of the Company's First Mortgage
Bonds, 8.30%, Series AB, due September 1, 2024 ("Bonds") under a
Registration Statement on Form S-3 (Registration no. 33-54329)
("Registration Statement"), the related Prospectus dated July 13, 1994 and
a related Prospectus Supplement, dated August 25, 1994.


Item 7.     Financial Statements, Pro Forma Financial Information
             and Exhibits

     (c)    Exhibits

            The following Exhibits are filed as a part of this Report and   
            as Exhibits to the Registration Statement:

            Exhibit 4.05(ac)     Twenty Ninth Supplemental Indenture,
                                 dated September 1, 1994, establishing
                                 the terms of the Bonds.

            Exhibit 12.01(a)     Computation of Ratio of Earnings to
                                 Fixed Charges


     Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by
the undersigned hereunto duly authorized.

                                        BLACK HILLS CORPORATION



                                        By /s/DALE E. CLEMENT              
                                           Dale E. Clement, Senior Vice 
                                                President - Finance


Dated:  September 2, 1994








                             BLACK HILLS CORPORATION


                                       TO


                                  CHEMICAL BANK,

                                               As Trustee



                           __________________________


                                  TWENTY NINTH


                             SUPPLEMENTAL INDENTURE


                          Dated as of September 1, 1994


                           __________________________


                    Supplemental to Indenture of Mortgage and
                   Deed of Trust Dated as of September 1, 1941



                         First Mortgage Bonds, Series AB,
                           8.30%, due September 1, 2024


<PAGE>
        TWENTY NINTH SUPPLEMENTAL INDENTURE, dated as of the 1st day
     of September, 1994, between Black Hills Corporation (which was
     formerly named Black Hills Power and Light Company and which now
     operates its electric utility operations under the assumed name
     of Black Hills Power and Light Company), a corporation organized
     and existing under the laws of the State of South Dakota
     (hereinafter called the "Company"), party of the first part, and
     Chemical Bank, a corporation organized and existing under the
     laws of the State of New York, as Trustee under the Indenture
     hereinafter mentioned (hereinafter called the "Trustee"), party
     of the second part.

        WHEREAS, in order to secure an authorized issue of First
     Mortgage Bonds of the Company, the Company has executed and
     delivered an Indenture of Mortgage and Deed of Trust to Central
     Hanover Bank and Trust Company (the successor by various mergers
     of which is Chemical Bank), as Trustee, dated September 1, 1941,
     hereinafter referred to as the "Original Indenture," and has also
     executed and delivered to said Trustee and its predecessors, as
     Trustee, various Supplemental Indentures supplementing and/or
     modifying the Original Indenture, respectively dated as follows:

     First Supplemental Indenture             July 15, 1945
     Second Supplemental Indenture            January 15, 1948
     Third Supplemental Indenture             January 15, 1949
     Fourth Supplemental Indenture            March 1, 1950
     Fifth Supplemental Indenture             March 1, 1952
     Sixth Supplemental Indenture             July 1, 1956
     Seventh Supplemental Indenture           May 1, 1957
     Eighth Supplemental Indenture            May 1, 1959
     Ninth Supplemental Indenture             April 1, 1960
     Tenth Supplemental Indenture             August 1, 1960
     Eleventh Supplemental Indenture          June 1, 1961
     Twelfth Supplemental Indenture           October 1, 1962
     Thirteenth Supplemental Indenture        May 1, 1963
     Fourteenth Supplemental Indenture        June 1, 1969
     Fifteenth Supplemental Indenture         June 15, 1974
     Sixteenth Supplemental Indenture         August 1, 1974
     Seventeenth Supplemental Indenture       July 15, 1975
     Eighteenth Supplemental Indenture        May 1, 1976
     Nineteenth Supplemental Indenture        February 15, 1977
     Twentieth Supplemental Indenture         April 1, 1977
     Twenty First Supplemental Indenture      June 1, 1977
     Twenty Second Supplemental Indenture     July 14, 1982
     Twenty Third Supplemental Indenture      September 1, 1986
     Twenty Fourth Supplemental Indenture     April 13, 1987
     Twenty Fifth Supplemental Indenture      June 15, 1988
     Twenty Sixth Supplemental Indenture      May 15, 1991
     Twenty Seventh Supplemental Indenture    June 1, 1991; and

<PAGE>
        WHEREAS, pursuant to the provisions of the Indenture,
     First Mortgage Bonds have been duly issued and are presently
     outstanding and secured by the Indenture as follows:

                                                                  
                                                 Principal Amount
        Series                                      Outstanding
        ------                                   ----------------
        Series O, 8.05%, due June 1, 1999           $ 4,875,000
        Series T, 6-5/8%, due April 1, 2007             840,000
        Series U, 6-5/8%, due April 1, 2007             840,000
        Series X, 8.375%, due October 1, 1998         3,340,000           
        Series Y, 9.49%, due June 15, 2018            6,000,000
        Series Z, 9.35%, due May 29, 2021            35,000,000
        Series AA, 9.00%, due September 1, 2003      10,561,304
                                                    -----------
                                                                  
                                                    $61,456,304
                                                    ===========
     ; and

        WHEREAS, as permitted by the Indenture, the Company, by
     resolutions of its Board of Directors duly adopted, has
     determined to create a new series of bonds to be known as its
     "First Mortgage Bonds, Series AB, 8.30%, due September 1, 2024"
     (herein called "Series AB Bonds"), to be initially authenticated
     and delivered in the aggregate principal amount of $45,000,000 in
     the form, having the characteristics and being entitled to the
     benefits as in the Indenture or as in this Supplemental Indenture
     provided; and

        WHEREAS, the Company, in exercise of the powers and
     authority conferred upon and reserved to it under and by virtue
     of the provisions of the Indenture, and particularly the
     provisions contained in Articles Two and Seventeen thereof, and
     pursuant to appropriate resolutions of its Board of Directors,
     has duly resolved and determined to make, execute and deliver to
     the Trustee a Twenty Ninth Supplemental Indenture in the form
     hereof (herein sometimes referred to as "this Supplemental
     Indenture") for the purposes herein provided; and

        WHEREAS, all conditions and requirements necessary to make
     this Supplemental Indenture a valid, binding and legal instrument
     in accordance with its terms have been done, performed and
     fulfilled, and the execution and delivery hereof have been in all
     respects duly authorized;

        NOW THEREFORE, THIS INDENTURE WITNESSETH:  That the Company,
     in consideration of the premises and of one dollar to it duly
     paid by the Trustee at or before the ensealing and delivery of
     these presents, the receipt whereof is hereby acknowledged, and
     of other good and valuable consideration, in order to better
     secure the payment both of the principal of and interest on all
     Bonds issued under the Indenture and that may be issued under
     this or any other indentures supplemental thereto, according to
     their tenor and effect, and the performance by the Company of all
     the covenants and conditions herein and therein contained, and in
     order to establish the terms of the Series AB Bonds, hereby
     further covenants and agrees to and with the Trustee and its
     successors in the trust under the Indenture for the benefit of
     all those who shall from time to time hold the Series AB Bonds as
     follows:

        The Company does hereby ratify and confirm its Mortgage and
     Pledge to the Trustee of all property described in the Indenture
     and does hereby by these presents grant, bargain, sell, warrant,
     alien, remise, release, convey, confirm, assign, mortgage, pledge
     and set over unto the Trustee, and to its successors and assigns
     forever, the following described property acquired by the Company
     and not heretofore specifically described under the Indenture:
 
                 LANDS IN LAWRENCE COUNTY, SOUTH DAKOTA

     Lot S, being a part of M.S. 1556, M.S. 1557, M.S. 1559, M.S.
     1866, Lot 10-3 and Lot 10-10 located in the SW1/4NW1/4 of Section 10,
     Township 4 North, Range 3 East of the Black Hills Meridian.

     An undivided one-half interest in Lot 1A, a subdivision of Tract
     B of Miller Addition located in the N1/2SW1/4 of Section 13, Township
     6 North, Range 2 East of the Black Hills Meridian.

                       Kirk Power Plant Properties

     Parcels Numbered 1, 2, 3, 4 and 5, the same being a portion of
     and contained within the Kirk Power Plant Tract No. 1, a
     subdivision of Mineral Surveys 400-1050-1309-1521-1522 according
     to plat of said subdivision on file in the office of the Register
     of Deeds of Lawrence County, South Dakota, and comprising a
     portion of Union Lode Mining Claim (Mineral Survey No. 400) and a
     portion of Robert Calvin, Robert Calvin No. 1 and Robert Calvin
     No. 2 Lode Mining Claims (Mineral Survey No. 1521), and which
     said Parcels numbered 1, 2, 3, 4 and 5 are as shown on plat filed
     in such Register of Deeds office and which are more particularly
     described as follows:

     (Reference ties for the above parcels:  From the Southwest corner
     of Section 33, Township 5 North, Range 3 East, Black Hills
     Meridian, Corner No. 3 of the Robert Calvin Lode Mining Claim
     [Mineral Survey No. 1521] in Whitewood Mining District, Lawrence
     County South Dakota, lies South 74 degrees 26' 10" East 2635.5 feet. 
     The survey corner [Northeast Corner of Kirk Power Plant Building]
     lies North 45 degrees 10' West 403.52 feet, from said Corner No. 3.)

     PARCEL NO. 1  (Cooling Tower Area):  From the survey corner of
     the Northeast Corner of foundation of Kirk Power Plant Building,
     corner No. 1, the place of beginning of said Parcel No. 1 lies
     South 58 degrees 55' East 99.3 feet.  From such Corner No. 1 continue
     thence as follows:

        Course     Bearing              Distance
        ------     -------              --------
        1 to 2     S62 degrees 30'E     186.00'
        2 to 3     S27 degrees 30'W      58.00'
        3 to 4     N62 degrees 30'W     186.00'
        4 to 1     N27 degrees 30'E      58.00'  the place of beginning

     PARCEL NO. 2  (Transformer Area):  From the survey corner of the
     Northeast corner of foundation of Kirk Power Plant Building,
     Corner No. 1 and place of beginning of this Parcel No. 2 lies
     North 45 degrees 08' East 10.00 feet.  From such Corner No. 1 continue
     thence as follows:

        Course     Bearing               Distance
        ------     -------               --------
        1 to 2     S44 degrees 52'E      60.00'
        2 to 3     S45 degrees 08'W      62.50'
        3 to 4     N44 degrees 52'W      60.00'
        4 to 1     N45 degrees 08'E      62.50'  the place of beginning

     PARCEL NO. 3  (Boiler and Turbine Area):  From the survey Corner
     on the Northeast Corner of foundation of Kirk Power Plant
     Building, Corner No. 1 and place of beginning of this Parcel No.
     3 lies north 73 degrees 35' West 109.83 feet.  From such Corner No. 1
     continue thence as follows:

        Course     Bearing                Distance
        ------     -------                -------- 
        1 to 2     S45 degrees 08'W       64.00'  Corner 2 is a point on NE
                                                  side of partition wall
        2 to 3     N44 degrees 52'W       35.33'  Along NE side of partition
                                                  wall
        3 to 4     S45 degrees 08'W       91.75'
        4 to 5     N44 degrees 52'W       41.33'
        5 to 6     N45 degrees 08'E       92.91'  Corner 6 is a point on NE
                                                  side of building wall
        6 to 7     S44 degrees 52'E       12.66'  Along NE side of building
                                                  wall
        7 to 8     N45 degrees 08'E       62.84'
        8 to 1     S44 degrees 52'E       64.00'   The place of beginning

      together with all of that portion of the existing Kirk Power
      Plant Building within the confines of such Parcel No. 3, as above
      described, and which said portion commences at Corner No. 1 of
      said Parcel, which is a point on the Northeast side of a
      partition wall in said building lying North 73 degrees 35' West 109.83
      feet from the Northeast Corner of the foundation of such Kirk
      Power Plant Building, and following thence along the lines and
      for the distances above designated between Corner No. 1 and
      Corner No. 2, and between Corner No. 2 and Corner No. 3, and
      thence for a distance of 65.94 feet along the line between Corner
      No. 3 and Corner No. 4 to a point immediately outside the
      building wall, thence at right angle parallel to a line from
      Corner No. 4 to Corner No. 5 to the intersection of the line
      between Corner No. 5 and Corner No. 6 and thence along such line
      to said Corner No. 6 thence along the line between Corner No. 6
      and to Corner No. 7 and along an extension of this line 16.83
      feet to the outside of the building wall from Corner No. 7,
      thence at right angles along the building wall, and parallel to
      the line from Corner No. 7 to Corner No. 8, a distance of 62.84
      feet to the intersection of a line between Corner No. 8 and
      Corner No. 1, thence at right angles along the line from Corner
      No. 8 to Corner No. 1 a distance of 47.17 feet and to such Corner
      No. 1, the point of beginning.

     PARCEL NO. 4  (Switch Station Area):  From survey corner on the
     Northeast corner of foundation of Kirk Power Plant Building,
     Corner No. 1 and place of beginning of this Parcel No. 4 lies
     South 28 degrees 04' West 326.2 feet.  From such Corner No. 1 continue
     thence as follows:

        Course     Bearing                Distance
        ------     -------                --------
        1 to 2     S32 degrees 26'E        88.00'
        2 to 3     S57 degrees 34'W       112.00'
        3 to 4     N32 degrees 26'W        88.00'
        4 to 1     N57 degrees 34'E       112.00'   the place of beginning

     PARCEL NO. 5  (Warehouse Area):  From survey corner on the
     Northeast corner of foundation of Kirk Power Plant Building,
     Corner No. 1 and place of beginning of this Parcel No. 5 lies
     North 50 degrees 39' West 365.7 feet.  From such Corner No. 1 continue
     thence as follows:

        Course     Bearing                Distance
        ------     -------                --------
        1 to 2     N64 degrees 33'W       100.00'
        2 to 3     N25 degrees 27'E        37.00'
        3 to 4     S64 degrees 33'E       100.00'
        4 to 1     S25 degrees 27'W        37.00'   to the place of beginning.


                   LANDS IN FALL RIVER COUNTY, SOUTH DAKOTA

     The North 60 feet of Lots 1 and 2 of Block 136 of the First
     Addition in the City of Edgemont.

                   LANDS IN PENNINGTON COUNTY, SOUTH DAKOTA

     Lot 2 of Prairie Hills Subdivision, as shown by the plat recorded
     in Plat Book 26 of Plats on Page 22 in the office of the Register
     of Deeds.

                      LANDS IN MEADE COUNTY, SOUTH DAKOTA

     Lots 27, 28, 29, and 30 in Block 4 of Fort Meade Addition to the
     City of Sturgis.

                        LANDS IN WESTON COUNTY, WYOMING

                          Osage Power Plant Properties

     A parcel of land hereby designated as the "Plant Site" described
     as follows:

     Beginning at Corner No. 1 which is 1305.7 feet distant from the
     West 1/4 corner of Section 15, Township 46 North, Range 63 West of
     the 6th Principal Meridian, Weston County, State of Wyoming, on a
     course North 65 degrees 53' East; thence South 36 degrees 31' East
     53 feet to Corner No. 2; thence North 53 degrees 29' East 168 feet
     to Corner No. 3; thence North 36 degrees 31' West 53 feet to Corner
     No. 4; thence South 53 degrees 29' West 168 feet to Corner No. 1
     which is the point of beginning; containing .204 acres.

     A parcel of land hereby designated as the "Cooling Tower Site"
     described as follows:

     Beginning at Corner No. 1 which is 209.8 feet distant from Corner
     No. 3 of the above-described Plant Site on a course South 33 degrees
     57' East; thence South 36 degrees 31' East 114.2 feet to Corner No. 2;
     thence North 53 degrees 29' East 69.5 feet to Corner No. 3; thence North
     36 degrees 31' West 114.2 feet to Corner No. 4; thence South 53 degrees
     29' West 69.5 feet to Corner No. 1 which is the point of beginning;
     containing .182 acres.

     A parcel of land hereby designated as the "Well Site" described
     as follows:

     Beginning at Corner No. 1 which is 160.9 feet distant from Corner
     No. 3 of the above-described Plant Site on a Course South 68 degrees
     24' East; thence South 36 degrees 31' East 30 feet to Corner No. 2;
     thence North 53 degrees 29' East 30 feet to Corner No. 3; thence
     North 36 degrees 31' West 30 feet to Corner No. 4; thence South 
     53 degrees 29' West 30 feet to Corner No. 1 which is the point of
     beginning; containing .021 acres.


                   LANDS IN CAMPBELL COUNTY, WYOMING

     An undivided 20 percent interest in all of Foothills Planned Unit
     Development, Phase 1A according to the corrected plat thereof
     recorded 26 December 1979 in Book 2 of Plats, Pages 227 and 228.

                       Wyodak Plant Properties

     An undivided 20 percent interest in a plot of land known as Plot
     A--Power Plant located in the NW1/4 of Section 27 in Township 50
     North, Range 71 West of the 6th Principal Meridian; being more
     particularly described as follows:

     Commencing at a brass cap which is the 1/4 corner between Sections
     28 and 27, Township 50 North, Range 71 West; thence N33 degrees
     57'43"E, 1354.62 feet to a point being the TRUE POINT OF BEGINNING: 
     thence

     N 45 degrees 00'52" W, 288.82 feet to a point; thence
     N 67 degrees 12'58" W, 29.35 feet to a point; thence
     N 03 degrees 27'50" E, 114.44 feet to a point; thence
     N 44 degrees 55'47" W, 312.85 feet to a point; thence
     N 05 degrees 01'01" E, 331.71 feet to a point; thence
     N 44 degrees 57'59" E, 564.50 feet to a point; thence
     S 44 degrees 52'59" E, 212.63 feet to a point; thence
     N 44 degrees 58'52" E, 393.95 feet to a point; thence
     S 48 degrees 21'29" E, 585.24 feet to a point; thence
     N 41 degrees 38'31" E, 85.16 feet to a point; thence
     S 48 degrees 21'29" E, 250.00 feet to a point; thence
     S 41 degrees 38'31" W, 85.16 feet to a point; thence
     S 48 degrees 21'29" E, 206.84 feet to a point; thence
     S 04 degrees 11'13" W, 295.68 feet to a point; thence
     S 44 degrees 56'10" W, 494.06 feet to a point; thence
     S 87 degrees 19'13" W, 69.18 feet to a point; thence
     N 15 degrees 59'58" W, 20.68 feet to a point; thence
     S 87 degrees 01'45" W, 414.71 feet to a point; thence
     S 00 degrees 56'29" W, 29.15 feet to a point; thence
     S 83 degrees 25'42" W, 332.06 feet to a point which is the TRUE POINT OF
     BEGINNING.

          Said Plot contains 36.08 acres, more or less.

     The E1/2NE1/4 of Section 28, Township 50 North, Range 71 West of the
     6th Principal Meridian.

     The NE1/4SE1/4 of Section 28, Township 50 North, Range 71 West of the
     6th Principal Meridian.

        TOGETHER with all contracts, agreements, rights and
     understandings, whether now owned or hereafter acquired for the
     purchase or exchange of electric energy or for the making of
     connections for exchange of energy or service;

        TOGETHER with, all and singular, the tenements,
     hereditaments and appurtenances belonging or in any way
     appertaining to said property or any part thereof, with the
     reversion and reversions, remainder and remainders, tolls, rents,
     revenues, issues, earnings, income, products and profits thereof,
     and all the estate, right, title and interest and claim
     whatsoever, at law as well as in equity, which the Company now
     has or may hereafter acquire in and to said property, and every
     part and parcel thereof;

        TOGETHER with all property, real, personal and mixed
     situated upon, connected with, used in connection with, or in any
     wise appertaining to any of the property described in the
     Indenture or in this Supplemental Indenture, presently owned by
     the Company (other than Excepted Property as defined in the
     Indenture), and including all rights of way, easements, licenses,
     permits, and privileges in connection with or pertaining to all
     of such property, whether existing by reason of express or
     implied, written or oral, evidences of ownership, rights,
     agreements or understandings;

        TOGETHER with all electric generating plants and electric
     transmission and distribution systems now owned by the Company,
     and any additions to or extensions of any such electric
     generating plants and electric transmission and distribution
     systems, together with all engines, dynamos, motors, generators,
     boilers, turbines, pole lines, poles, wires, cross-arms,
     insulators, transformers, meters, buildings, erections,
     structures, stations, substations, powerhouses, power producing
     and power transmitting equipment, water, water rights,
     waterwheels, headworks, race-ways, hydraulic-works, hydroelectric
     plants, cables, conduits, tools, instruments, apparatus,
     appliances, machinery, facilities, fixtures and all other
     property used or provided for use in the construction, repair,
     maintenance or operation thereof (other than Excepted Property as
     defined in the Indenture), and together also with all the rights,
     privileges, franchises, easements, licenses, ordinances, rights
     of way, liberties, immunities and permits of the Company
     howsoever conferred or acquired with respect to the construction,
     maintenance, repair or operation of said electric generating
     plants and electric transmission or distribution systems, and
     each of them, and any additions thereto and extension thereof;

        TO HAVE AND TO HOLD all such properties, real, personal
     and mixed, mortgaged, pledged or conveyed by the Company as
     aforesaid, or intended so to be, unto the Trustee and its
     successors and assigns forever;
  
        IN TRUST, NEVERTHELESS, for the same purposes and upon
     the same trusts, terms and conditions, and subject to and with the
     same provisions and covenants as are set forth in the Indenture
     (as amended by this Supplemental Indenture) with the same effect
     in all respects as if the property and rights herein described
     and herein conveyed to the Trustee had, at the time of the
     execution and delivery of the Original Indenture, been owned by
     the Company and had been specifically and at length described in
     and conveyed to the Trustee by the Original Indenture as a part
     of the property therein stated to be conveyed.


                              ARTICLE ONE

                         Series AB Bonds, 8.30%

        SECTION 1.01.  There is hereby created a series of Bonds,
     known as and entitled "First Mortgage Bonds, Series AB, 8.30%,
     due September 1, 2024", and the form thereof shall be as provided
     in this Supplemental Indenture.

        The aggregate principal amount of Series AB Bonds which
     may be authenticated and delivered and outstanding under the
     Indenture and this Supplemental Indenture shall be limited in
     aggregate principal amount to $45,000,000, except as provided
     under Section 2.12 of the Indenture.  The Series AB Bonds shall
     bear interest at the rate of 8.30% per annum until the principal
     thereof becomes due and payable and shall bear interest on
     overdue principal (including any overdue mandatory prepayment of
     principal) and premium, if any, and (to the extent legally
     enforceable) on any overdue installment of interest at the rate
     of 9.30% per annum until such overdue principal, premium or
     interest shall be paid.  The Series AB Bonds shall mature
     September 1, 2024.

        The Series AB Bonds shall be registered Bonds without
     coupons in denominations of $1,000 and any multiples of $1,000
     which may be executed by the Company and delivered to the Trustee
     for authentication and delivery.  The date of commencement of the
     first interest period for the Series AB Bonds shall be the date
     of initial authentication and delivery thereof.  The Series AB
     Bonds shall be dated as provided in Section 2.05 of the
     Indenture, and shall be numbered from ABRX1 consecutively
     upwards.  All Series AB Bonds shall bear interest from their
     respective issue dates.  The principal and interest shall be due
     and payable as provided in the Bond form at Section 1.02 of this
     Supplemental Indenture.  The principal of, premium, if any, and
     interest on the Series AB Bonds shall be payable at the principal
     corporate trust office of the Trustee, in the Borough of
     Manhattan, The City of New York, in any coin or currency of the
     United States of America which at the time of payment shall be
     legal tender for the payment of public and private debts.  The
     Series AB Bonds shall be subject to redemption as provided in
     Sections 1.03 and 1.04 of this Supplemental Indenture and Section
     8.08 of the Indenture. 

        Without limiting the other indemnities provided to the
     Trustee, the Company shall indemnify and save the Trustee
     harmless from any liabilities and costs incurred by the Trustee
     arising out of the making of the final payment when due of the
     principal owing on any of the Series AB Bonds without the
     surrender of such Bond to the Trustee.

        The Trustee is hereby appointed Registrar in respect of
     the Series AB Bonds, and the principal corporate trust office of the
     Trustee in the Borough of Manhattan, The City of New York, is
     hereby designated as the office or agency of the Company in said
     Borough where notices or demands in respect of Series AB Bonds
     may be served.

        The definitive Series AB Bonds shall be issued in such
     printed form as approved by the Trustee.  Subject to the
     foregoing provisions of this Section and to the provisions of
     Section 2.11 of the Indenture, all definitive Series AB Bonds
     shall, upon surrender thereof to the Trustee at its principal
     office, be exchangeable for other Bonds of the same series, in
     registered form and in such authorized denomination or
     denominations in the same aggregate principal amount, as may be
     requested by the holder surrendering the same.  The Company will
     execute, and the Trustee shall authenticate and deliver,
     registered Series AB Bonds without coupons, whenever the same
     shall be required for any such exchange.

        SECTION 1.02.  The text of the Series AB Bonds, and the
     certificate of authentication of the Trustee to be executed
     thereon, are to be substantially in the following forms,
     respectively:

                      (FORM OF SERIES AB BONDS)

     No. ABRX __________                              $______________________


                        BLACK HILLS CORPORATION

       FIRST MORTGAGE BOND, SERIES AB, 8.30%, DUE SEPTEMBER 1, 2024

        BLACK HILLS CORPORATION (hereinafter called the "Company"),
     a corporation organized and existing under the laws of the State
     of South Dakota, for value received, hereby promises to pay to   
                                              , or registered assigns,
     on the 1st day of September, 2024, at the principal corporate trust 
     office of the Trustee, in the Borough of Manhattan, The City of New 
     York,                                            Dollars, in any 
     coin or currency of the United States of America which at the time 
     of payment shall be legal tender for the payment of public and 
     private debts, and to pay interest thereon from the date hereof, at 
     the rate of 8.30 percent, per annum (computed on the basis of a 
     360-day year of 12 thirty-day months), payable at said principal 
     office of the Trustee in like coin or currency semi-annually on 
     March 1 and September 1 in each year until the principal hereof shall
     have become due and payable, and thereafter if default be made in 
     the payment of such principal and premium, if any, and on any overdue
     installment of interest, at the rate of 9.30 percent, per until 
     such overdue principal, premium or interest shall be paid.  The
     interest payment shall be due March 1, 1995 and shall include interest
     from the date of initial authentication and delivery thereof.

        This Bond is one of an authorized issue of Bonds of the
     Company known as its "First Mortgage Bonds", issued and to be issued 
     in one or more series under, and all equally and ratably secured (except
     as any sinking, amortization, improvement, renewal or other analogous
     fund, established in accordance with the provisions of the Indenture
     hereinafter mentioned, may afford additional security for the Bonds of 
     any particular series) by an Indenture of Mortgage and Deed of Trust
     dated as of September 1, 1941 executed by the Company to Central 
     Hanover Bank and Trust Company (subsequently known as The Hanover 
     Bank and herein, with its successor by merger, Chemical Bank, called 
     the "Trustee"), as Trustee, as supplemented and amended by 
     Supplemental Indentures dated as of July 15, 1945, January 15, 1948, 
     January 15, 1949, March 1, 1950, March 1, 1952, July 1, 1956, May 1, 
     1957, May 1, 1959, April 1, 1960, August 1, 1960, June 1, 1961, 
     October 1, 1962, May 1, 1963, June 1, 1969, June 15, 1974, August 1, 
     1974, July 15, 1975, May 1, 1976, February 15, 1977, April 1, 1977, 
     June 1, 1977, July 14, 1982, September 1, 1986, April 13, 1987, 
     June 15, 1988, May 15, 1991, June 1, 1991 and September 1, 1994 
     (said Original Indenture as so supplemented and amended being 
     hereinafter collectively called the "Indenture"), to which Indenture
     and all further instruments supplemental thereto reference is hereby 
     made for a description of the properties mortgaged and pledged, the 
     nature and extent of the security, the rights of the holders of 
     said Bonds and the coupons appurtenant to coupon Bonds, if any, and 
     of the Trustee and of the Company in respect of such security, and 
     the terms and conditions upon which said Bonds are and are to be 
     issued and secured.

        As provided in the Indenture, said Bonds are issuable in series
     which may vary as in the Indenture provided or permitted.  This Bond is 
     one of a series of Bonds authorized by the Twenty Ninth Supplemental
     Indenture and entitled "First Mortgage Bonds, Series AB, 8.30%, due
     September 1, 2024" (the "Series AB Bonds").

        To the extent permitted by the Indenture and as provided
     therein, with the consent of the Company and upon the written consent or 
     affirmative vote of at least sixty-six and two-thirds percent in 
     principal amount of the Bonds then outstanding and entitled to 
     consent, and of not less than sixty-six and two-thirds percent, in 
     principal amount of the Bonds then outstanding and entitled to 
     consent of each series affected thereby in case one or more but less 
     than all of the series of Bonds issued under the Indenture are so 
     affected, the rights and obligations of the Company and of the 
     holders of Bonds and coupons appurtenant to coupon Bonds, and 
     the terms and provisions of the Indenture and of any instrument 
     supplemental thereto may be modified from time to time, provided that 
     no such modification or alteration shall be made which would postpone 
     the date fixed herein or in the Indenture for the payment of the 
     principal of, or any installment of interest on, the Bonds, or reduce 
     the principal of, or the rate of interest payable on, the Bonds, or 
     reduce the percentage of the principal amount of Bonds the consent 
     of which is required for the authorization of any such modification 
     or alteration, without the consent of all of the holders affected 
     thereby.  The rights, duties or immunities of the Trustee shall not 
     be modified without the written consent of the Trustee.

        Consent Bonds.
        --------------
        The Holders, including any successor Holders, of these Series AB 
     Bonds to be issued under the terms of the Twenty Ninth Supplemental 
     Indenture, by becoming such Holders shall be deemed to have consented to 
     the Twenty Eighth Supplemental Indenture ("Proposed Supplement"), a copy 
     of which is attached as Exhibit A to the Twenty Ninth Supplemental 
     Indenture authorizing the Series AB Bonds.  This provision does hereby 
     constitute a written consent of the Holders, including all successor 
     Holders, of the Series AB Bonds to the execution and adoption of the 
     Proposed Supplement under the provisions of Section 18.11 of the 
     Indenture, and such consent is received by the Trustee as a consent 
     for the Trustee to execute the Proposed Supplement in lieu of the 
     holding of a meeting of Bondholders pursuant to Article Eighteen of 
     the Indenture.

        Optional Redemption.
        --------------------
        The Series AB Bonds are subject to redemption, in whole or
      in part, at the option of the Company on (but not before) September 1, 
      2004 or at any time thereafter, upon at least thirty (30) days and not 
      more than fifty (50) days notice, mailed to all registered owners of the 
      Bonds of this Series to be redeemed, at their respective addresses as 
      the same shall appear on the Bond register of the Company, all 
      subject to the conditions and as more fully provided in the Indenture,
      upon payment of accrued interest to the redemption date plus the 
      applicable percentage of the principal amount thereof set forth below:

       If Redeemed During                 If Redeemed During
        12 Month Period                    12 Month Period
           Beginning        Redemption        Beginning         Redemption  
          September 1          Price         September 1           Price     
          -----------          -----         -----------           -----

              2004             104.040%           2010             101.616%
              2005             103.636            2011             101.212
              2006             103.232            2012             100.808
              2007             102.828            2013             100.404
              2008             102.424            2014             100.000
              2009             102.020

     and thereafter at 100 percent of the principal amount thereof.

        Pursuant to the provisions of Section 8.05 of the Indenture,
     the Company may request the Trustee to apply moneys deposited with the 
     Trustee ("Trust Moneys") for various reasons toward the redemption of 
     those Bonds, including payment of premium and accrued interest, 
     selected by the Company.  In the Twenty Ninth Supplemental Indenture, 
     the Company has covenanted not to request the Trustee to apply any 
     Trust Moneys to the redemption of the Series AB Bonds prior to 
     September 1, 2004.

        Pursuant to the provisions of Section 8.08 of the Indenture,
     the Series AB Bonds are further subject to redemption, in whole or in 
     part, by the Trustee applying certain Trust Moneys which have been held 
     by the Trustee for a period of over two years.  Any such redemption is
     made pro rata among the series of Bonds then outstanding in the ratio of 
     principal amount.  Redemption is at 100 percent of principal, plus any 
     premium due at the time of redemption and accrued interest to 
     redemption date.

        The particular Series AB Bonds to be redeemed from time to
     time shall be selected by the Trustee in the amount of $1,000 or an 
     integral multiple thereof and as nearly as practicable pro rata among 
     the registered holders of such Series AB Bonds according to the 
     respective principal amounts of such Bonds.

        If this Bond or any portion thereof ($1,000 or a multiple) shall
     be duly called for redemption as provided in the Indenture, this Bond or 
     such portion thereof shall (unless the Company shall default in the 
     payment of the redemption price) cease to bear interest from and after 
     the date fixed for redemption.

        Upon any partial redemption of this Bond, this Bond may, at
     the option of the registered holder hereof, be either (a) surrendered to 
     the Trustee in exchange for one or more new Bonds of this Series for the 
     principal amount of the unredeemed portion of this Bond or (b) submitted
     to the Trustee for notation hereon by the Trustee of the payment of the 
     portion of the principal hereof so called for redemption.

        If an Event of Default, as defined in the Indenture, shall
     occur, the principal of this Bond may become or be declared due and 
     payable, in the manner and with the effect provided in the Indenture.

        This Bond is transferable by the registered owner hereof in
     person or by attorney authorized in writing, at said principal corporate 
     trust office of the Trustee, upon surrender for cancellation of this Bond 
     and on payment of charges, and upon any such transfer a new Bond or 
     Bonds, of the same series, for the same aggregate principal amount, will
     be issued to the transferee in exchange herefor.

        First Mortgage Bonds, Series AB, 8.30%, due September 1, 2024, 
     are issuable as fully registered Bonds without coupons of the denomina-
     tions of $1,000 and any multiple of $1,000 which may be executed by the
     Company and delivered to the Trustee for authentication and delivery. 
     The Series AB Bonds, upon surrender thereof to the Trustee at its 
     principal corporate trust office in the Borough of Manhattan, The 
     City of New York, are exchangeable for other Bonds of the same series 
     in such authorized denomination or denominations in the same aggregate
     principal amount, as may be requested by the holders surrendering the 
     same.

        The Company and the Trustee may deem and treat the person in
     whose name this Bond is registered as the absolute owner hereof, for the 
     purpose of receiving payment of or on account of the principal hereof and 
     interest due hereon, and neither the Company nor the Trustee shall be 
     affected by any notice to the contrary.  Interest payable herein shall 
     be paid to the person in whose name the Bond is registered at the close
     of business on February 15 or August 15 (whether or not on a business day)
     next preceding the interest payment date, except for defaulted interest and
     unmatured accrued interest on the Series AB Bonds called for redemption 
     on a date other than an interest payment date.

        No recourse shall be had for the payment of the principal of
     or the interest on this Bond, or for any claim based hereon or otherwise 
     in respect hereof or of the Indenture or of any indenture supplemental 
     thereto, against any incorporator, stockholder, director or officer, as 
     such, past, present or future, of the Company or of any predecessor or 
     successor corporation, either directly or through the Company or any
     predecessor or successor corporation, whether by virtue of any 
     constitution, statute or rule of law, or by the enforcement of any 
     assessment or penalty or by any legal or equitable proceeding or 
     otherwise howsoever; all such liability being, by the acceptance 
     hereof and as a part of the consideration for the issuance hereof, 
     expressly waived and released by every holder hereof, as more fully 
     provided in the Indenture; provided, however, that nothing herein or 
     in the Indenture contained shall be taken to prevent recourse to and 
     the enforcement of the liability, if any, of any shareholder or any 
     stockholder or subscriber to capital stock upon or in respect of
     shares of capital stock not fully paid up.

        This Bond shall not be valid or become obligatory for any purpose 
     until the certificate of authentication hereon shall have been signed by 
     the Trustee, or its successor as Trustee, under the Indenture.

        IN WITNESS WHEREOF, the Company has caused this Bond to be
     signed in its name by its President or one of its Vice Presidents, and 
     its corporate seal to be impressed or imprinted hereon and attested by 
     its Secretary or one of its Assistant Secretaries.

       Dated:                         BLACK HILLS CORPORATION,


                                      By_______________________________
                                        President

     ATTEST:

     ____________________________________
     Secretary

            (FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION)

        This is one of the Bonds, of the series designated therein,
     described in the within mentioned Indenture.

                                     CHEMICAL BANK, as Trustee,


                                     By_______________________________
                                       Authorized Officer


        SECTION 1.03.  The Series AB Bonds shall be redeemable at the 
     option of the Company, at any time and from time to time, in whole or in 
     part, on or after September 1, 2004, in the manner and upon the notice 
     provided in Article Ten of the Indenture, at the redemption prices set 
     forth in the form of Series AB Bonds provided in Section 1.02 of this 
     Supplemental Indenture, together in each case, with accrued interest to 
     the redemption date.

        SECTION 1.04.  Notwithstanding the provisions of Section 10.03 
     of the Indenture, in case of the redemption at any time of less than all 
     the outstanding Series AB Bonds, the particular Bonds or parts thereof to 
     be redeemed shall be selected by the Trustee from the outstanding 
     Series AB Bonds not previously called for redemption as nearly as 
     practicable pro rata among the registered holders of the Series AB Bonds 
     according to the respective principal amounts of such Bonds, provided 
     that the portions of the principal of Series AB Bonds at any time so 
     selected for redemption in part shall be equal to $1,000 or a multiple
     thereof.

        SECTION 1.05.  Notwithstanding that Section 8.05 of the Indenture 
     authorizes the Company to request the Trustee to apply Trust Moneys 
     toward the redemption of Bonds to be selected by the Company, the 
     Company does hereby covenant that the Company will not request the 
     Trustee to apply any Trust Moneys to the redemption of the Series AB 
     Bonds prior to September 1, 2004.

                             ARTICLE TWO

                            Consent Bonds

        The Holders, including any successor Holders, of the Series
     AB Bonds to be issued under the terms of this Supplemental Indenture, by
     becoming such Holders shall be deemed to have consented to the Twenty 
     Eighth Supplemental Indenture ("Proposed Supplement"), a copy of which is 
     attached as Exhibit A to this Supplemental Indenture.  This provision 
     does hereby constitute a written consent of the Holders, including all 
     successor Holders, of the Series AB Bonds to the execution and adoption 
     of the Proposed Supplement under the provisions of Section 18.11 of the
     Indenture, and such consent is received by the Trustee as a consent for 
     the Trustee to execute the Proposed Supplement in lieu of the holding of 
     a meeting of Bondholders pursuant to Article Eighteen of the Indenture.

                              ARTICLE THREE

                         Miscellaneous Provisions

        SECTION 3.01.  The Company covenants that so long as any Series 
     AB Bonds shall remain outstanding it will comply with the covenants 
     contained in Sections 9.06, 9.15, 9.16, 9.20 and 9.22 of the Indenture; 
     provided, if the Proposed Supplement as referenced in Article Two of this 
     Supplemental Indenture is adopted, this covenant would no longer apply 
     to Sections 9.06, 9.15 and 9.20, which would be deleted by the Proposed 
     Supplement, and would apply to Sections 9.16 and 9.22 as would be 
     amended by the Proposed Supplement.

        SECTION 3.02.  The aggregate principal amount of Bonds which, 
     immediately after the authentication and delivery of the Series AB Bonds 
     to be issued under this Supplemental Indenture, will be outstanding under 
     the provisions of, and secured by, the Indenture, as amended by this 
     Supplemental Indenture, will be $61,456,304, consisting of the Bonds of 
     Series O, T, U, X, Y, Z and AA hereinbefore set forth in the second 
     recital of this Supplemental Indenture and $45,000,000 aggregate 
     principal amount of Series AB Bonds hereby created.

        SECTION 3.03.  The Company, by the execution hereof, acknowledges 
     that a true copy of this Supplemental Indenture has been delivered to and 
     received by it.

        SECTION 3.04.  Except as amended by this Supplemental Indenture, 
     all the provisions, terms and conditions of the Indenture shall continue 
     in full force and effect.

        SECTION 3.05.  This Supplemental Indenture may be executed in 
     several counterparts, all or any of which may be treated for all purposes 
     as one original and shall constitute and be one and the same instrument.

        IN WITNESS WHEREOF, BLACK HILLS CORPORATION, party hereto of
     the first part, has caused this Supplemental Indenture to be executed on 
     its behalf by its Chairman of the Board or its President or one of its 
     Vice Presidents and its corporate seal to be hereto affixed and to be 
     attested by its Secretary or an Assistant Secretary, and CHEMICAL BANK, 
     party hereto of the second part, in evidence of its acceptance of the
     trust hereby created, has caused this Supplemental Indenture to be 
     executed on its behalf by one of its Vice Presidents or Assistant 
     Vice Presidents and its corporate seal to be hereto affixed and to 
     be attested by a Trust Officer, all as of the day and year first 
     above written.

                                      BLACK HILLS CORPORATION


     [Corporate Seal]                      By /s/ Dale E. Clement
                                           Senior Vice President - Finance

     ATTEST:

     /s/ Roxann R. Basham
     Secretary

     Signed, sealed and delivered by
        BLACK HILLS CORPORATION in the
        presence of:

        /s/ Bonita A. Edwards

        /s/ Jeanette M. Howe

                                      CHEMICAL BANK


     [Corporate Seal]                      By /s/ T. C. Knight
                                              Assistant Vice President

     ATTEST:

     /s/ Andrew M. Deck
     Trust Officer

     Signed, sealed and delivered by
        CHEMICAL BANK in the presence of:

      /s/ Karen Mulroy

      /s/ Francine Springer


     STATE OF SOUTH DAKOTA               )
                                         ) ss.:
     COUNTY OF PENNINGTON                )


        On this 31st day of August, 1994, before me, Barbara Rask, the under-
     signed officer, personally appeared Dale E. Clement, to me personally 
     known, who acknowledged himself to be, and being by me duly sworn, did 
     say that he is Senior Vice President - Finance of BLACK HILLS 
     CORPORATION, a corporation, and that the seal affixed to the foregoing
     instrument is the corporate seal of said corporation and that said 
     instrument was executed by, and signed in the name of, the corporation,
     by him, as such Senior Vice President - Finance and sealed on behalf 
     of the corporation by authority of its Board of Directors for the 
     purposes therein contained, and the said Dale E. Clement acknowledged 
     the same as the free act and deed of said corporation.

        IN WITNESS WHEREOF, I hereunto set my hand and official seal.


     My Comm. Exp. July 25, 1999                   /s/ Barbara Rask
     [Notarial Seal]                                    Notary Public
                                                   


     STATE OF NEW YORK                   )
                                         ) ss.:
     COUNTY OF NEW YORK                  )


        On this 30th day of August, 1994, before me, Emily Fayan, the under-
     signed officer, personally appeared T. C. Knight, to me personally known,
     who acknowledged himself to be, and being by me duly sworn, did say that 
     he is an Assistant Vice President of CHEMICAL BANK, a corporation, and 
     that the seal affixed to the foregoing instrument is the corporate seal 
     of said corporation and that said instrument was executed by, and signed
     in the name of, the corporation, by him, as such Assistant Vice 
     President, and sealed on behalf of the corporation by authority of 
     its Board of Directors for the purposes therein contained, and the 
     said T. C. Knight acknowledged the same as the free act and deed of said 
     corporation.

        IN WITNESS WHEREOF, I hereunto set my hand and official seal.


                                                   /s/ Emily Fayan
     [Notarial Seal]                                    Notary Public

<PAGE>
                                                                EXHIBIT A
                                   to Twenty Ninth Supplemental Indenture

                                PROPOSED
                                --------
                  TWENTY EIGHTH SUPPLEMENTAL INDENTURE

          TWENTY EIGHTH SUPPLEMENTAL INDENTURE, dated as of the ______ day 
     of _________________, 19__, between Black Hills Corporation (formerly 
     named and now operating its electric utility division as Black Hills 
     Power and Light Company), a corporation organized and existing under 
     the laws of the State of South Dakota (hereinafter called the 
     "Company"), party of the first part, and Chemical Bank, a corporation
     organized and existing under the laws of the State of New York, as 
     Trustee under the Indenture hereinafter mentioned (hereinafter called 
     the "Trustee"), party of the second part.

          WHEREAS, in order to secure an authorized issue of First Mortgage 
     Bonds of the Company, the Company has executed and delivered an Indenture 
     of Mortgage and Deed of Trust to Central Hanover Bank and Trust Company
     (subsequently known as The Hanover Bank) as Trustee, dated September 1, 
     1941, hereinafter referred to as the "Original Indenture," and has also
     executed and delivered to said Trustee and to Manufacturers Hanover Trust
     Company (which on September 8, 1961 became the Trustee under the Original
     Indenture, as theretofore supplemented and amended, by virtue of the 
     merger of said The Hanover Bank into Manufacturers Trust Company, under 
     said name Manufacturers Hanover Trust Company), as Trustee, various 
     Supplemental Indentures supplementing and/or modifying the Original 
     Indenture, respectively referred to herein and dated as follows:

     First Supplemental Indenture            July 15, 1945
     Second Supplemental Indenture           January 15, 1948
     Third Supplemental Indenture            January 15, 1949
     Fourth Supplemental Indenture           March 1, 1950
     Fifth Supplemental Indenture            March 1, 1952
     Sixth Supplemental Indenture            July 1, 1956
     Seventh Supplemental Indenture          May 1, 1957
     Eighth Supplemental Indenture           May 1, 1959
     Ninth Supplemental Indenture            April 1, 1960
     Tenth Supplemental Indenture            August 1, 1960
     Eleventh Supplemental Indenture         June 1, 1961
     Twelfth Supplemental Indenture          October 1, 1962
     Thirteenth Supplemental Indenture       May 1, 1963
     Fourteenth Supplemental Indenture       June 1, 1969
     Fifteenth Supplemental Indenture        June 15, 1974
     Sixteenth Supplemental Indenture        August 1, 1974
     Seventeenth Supplemental Indenture      July 15, 1975
     Eighteenth Supplemental Indenture       May 1, 1976
     Nineteenth Supplemental Indenture       February 15, 1977
     Twentieth Supplemental Indenture        April 1, 1977
     Twenty First Supplemental Indenture     June 1, 1977
     Twenty Second Supplemental Indenture    July 14, 1982
     Twenty Third Supplemental Indenture     September 1, 1986
     Twenty Fourth Supplemental Indenture    April 13, 1987
     Twenty Fifth Supplemental Indenture     June 15, 1988
     Twenty Sixth Supplemental Indenture     May 15, 1991
     Twenty Seventh Supplemental Indenture   June 1, 1991
     Twenty Eighth Supplemental Indenture    (when executed)
     Twenty Ninth Supplemental Indenture     September 1, 1994
 
     [list any additional Supplements existing at the time of execution]

     which, as supplemented and amended by said ___________________________ 
     [the number of supplements at time of execution] Supplemental Indentures
     is hereinafter referred to as the "Indenture"; and

          WHEREAS, Chemical Bank is the successor by merger with Manufacturers 
     Hanover Trust Company and now is the Trustee under the Indenture; and

          WHEREAS, pursuant to the provisions of the Indenture, First
     Mortgage Bonds have been duly issued and are presently outstanding and 
     secured by the Indenture as follows:

                                 Principal Amount
           Series                   Outstanding

     [List all Series and principal amount outstanding at time of execution.]

          WHEREAS, the Company deems it advisable that the Indenture be 
     amended as herein provided; and

          WHEREAS, the Company since May 1, 1994 has issued Bonds (referred to 
     herein as "Consent Bonds") under the Indenture pursuant to Supplemental 
     Indentures that each contained a consent provision providing that the 
     Holders and any successor Holders of such Bonds shall be deemed to have 
     consented to the execution and adoption of this Twenty Eighth Supple-
     mental Indenture, and authorizing the Trustee to receive and accept such 
     provision as a consent to execute this supplement under the provisions 
     of Section 18.11 of the Indenture in lieu of the holding of a meeting 
     of Bondholders; and

          WHEREAS, the total of (i) the principal amount of all Consent Bonds 
     outstanding and (ii) the principal amount of all Bonds outstanding issued 
     prior to May 1, 1994, the Holders of which have consented in writing to 
     the adoption of this Twenty Eighth Supplemental Indenture, constitutes 
     the consent of the requisite amount of Bonds outstanding under Section 
     18.11 of the Indenture to authorize the execution thereof; and 

          WHEREAS, the Company, in the exercise of the powers and authority 
     conferred upon and reserved to it under and by virtue of the provisions 
     of the Indenture, and particularly the provisions contained in Articles 
     Seventeen and Eighteen thereof, and pursuant to appropriate resolutions 
     of its Board of Directors has duly resolved and determined to make, 
     execute and deliver to the Trustee the Twenty Eighth Supplemental 
     Indenture in the form hereof for the purposes therein provided; and

          WHEREAS, all conditions and requirements necessary to make this 
     Twenty Eighth Supplemental Indenture a valid, binding and legal 
     instrument in accordance with its terms have been done, performed and 
     fulfilled, and the execution and delivery hereof have been in all 
     respects duly authorized.

          NOW, THEREFORE, THIS INDENTURE WITNESSETH:

          That the Company, in consideration of the premises and one dollar to 
     it duly paid by the Trustee at or before the ensealing and delivery of 
     these presents, the receipt whereof is hereby acknowledged, and of other 
     good and valuable consideration, in order to amend certain provisions of
     the Indenture, hereby further covenants and agrees to and with the 
     Trustee and its successors in the trust under the Indenture for the 
     benefit of all those who shall from time to time hold the Bonds as 
     follows:


                              ARTICLE ONE

                      Amendments to the Indenture

     1.01.  Deletion of Contracts, Leases and Franchises from the Lien of
the Indenture.  The following granting clauses: Eleventh--Certain Contracts,
Twelfth--Leases and Thirteenth--Franchises are deleted from the Indenture and
any and all property interests described in the Eleventh, Twelfth and 
Thirteenth Granting Clauses are hereby released from the Lien of the 
Indenture.  Subparagraphs (e) and (f) of Section 7.01 of Article Seven are
deleted from the Indenture.


     1.02.  Obligation to Maintain Business.  Section 9.13 of Article Nine
of the Indenture is amended so as to read as follows:

     SECTION 9.13.  Except in the case of a merger, consolidation, 
conveyance or transfer as in Article Fourteen provided, the Company will 
at all times maintain its corporate existence and right to carry on 
business, and will duly procure all renewals and extensions thereof, and 
shall do or cause to be done all things necessary to preserve and keep 
in full force and effect its corporate existence and rights and franchises
of the Company; provided, however, that the Company shall not be required 
to preserve any such right or franchise if, in the judgment of the Company, 
the preservation thereof is no longer desirable in the conduct of the 
business of the Company and the loss thereof would not adversely affect the
interests of the Bondholders in any material respect.  The Company will 
not enter into any merger or consolidation, or make any conveyance or lease
of all or substantially all of the Trust Estate as an entirety unless, in 
connection therewith, the Company and/or the successor corporation and/or 
the lessee, as the case may be, shall observe and comply with the terms 
and conditions of Article Fourteen applicable to such transaction.

     The first paragraph of Section 9.05 of Article Nine of the Indenture 
is amended so as to read as follows:

     SECTION 9.05.  The Company covenants that the business of the Company 
will be carried on and conducted in an efficient manner; all property, 
plants, appliances and equipment of the Company useful in the carrying on 
of its business will be kept in repair and maintained in good working order
and condition, and if worn or injured will be replaced by other property
suitable to the business of the Company and of at least equal value.


     1.03.  Excepted Property.  The Sixteenth Granting Clause of the 
Indenture is hereby amended so as to read as follows:

                                  SIXTEENTH

                               EXCEPTED PROPERTY

     There is, however, expressly excepted and excluded from the Lien of 
this Indenture the following described property of the Company, herein 
sometimes referred to as "Excepted Property":

     A.   all cash on hand, in banks or in other financial institutions 
with which the Company maintains deposits, shares of stock, bonds, notes, 
evidences of indebtedness and other securities not hereafter paid or 
delivered to, deposited with, or held by, the Trustee hereunder or 
required so to be;

     B.   all contracts, leases and other agreements of whatsoever kind 
and nature (including pole attachment agreements and joint pole agreements),
contract rights, bills, notes and other instruments, accounts receivable, 
claims, credits, demands, judgments, choses in action, patents, patent 
licenses and other patent rights, patent applications, trade names, 
trademarks and other general intangibles;

     C.   all permits, licenses, franchises (including municipal franchises
and other rights to use public ways) and rights (however characterized) 
granted by any governmental entity with respect to air, water or other 
types of pollution or pollution credits;

     D.   all motor vehicles, automobiles, buses, trucks, truck cranes, 
tractors, trailers and similar vehicles, movable equipment, all rolling 
stock, railcars, containers and other railroad equipment, all vessels, 
boats, barges and other marine equipment, all airplanes, airplane engines
and flight equipment, and all components, spare parts, accessories, 
supplies and fuel used or to be used in connection with any of the 
foregoing;

     E.   all goods, wares, merchandise, equipment, spare parts and tools 
held for sale or lease in the ordinary course of business or for use or 
consumption in, or in the operation of, any properties of, or for the 
benefit of, the Company, or held in advance of use thereof for maintenance,
replacement or fixed capital purposes; all fuel, materials and supplies and
other personal property which are consumable (otherwise than by ordinary 
wear and tear) in their use in the electric utility business;

     F.   all office furniture and office equipment; all satellites and 
other equipment and materials used or to be used in outer space; all 
business machines; all communications equipment (including telephone 
equipment); all computer equipment; all record production, storage and 
retrieval equipment; and all components, spare parts, accessories, programs
(other than computer software) and supplies used or to be used in
connection with any of the foregoing;

     G.   all crops, timber, sand, gravel, rocks, earth, natural gas, coal,
ore, uranium, gas, oil and other minerals harvested, mined or extracted or
otherwise separated from the land, or lying or being upon, within or under
any properties of the Company, including the Trust Estate, all mineral 
rights, leases and royalties and income therefrom, and all rights to 
explore for minerals, and gas or oil wells or any lease or real estate
acquired for the purpose of obtaining gas or oil rights;

     H.   all electric energy, steam, water, ice and other products 
generated, manufactured, produced, provided or purchased by the Company 
for sale, transmission or distribution or used or to be used by the Company;

     I.   all leasehold interests and leasehold improvements;

     J.   all property, real, personal and mixed, which is:

          (i)  not specifically subjected or required to be subjected to 
the Lien of this Indenture by any express provision hereof; and

          (ii) not used or to be used in the electric utility business, or
in connection with the operation of any property specifically subjected or 
required to be subjected to the Lien of this Indenture by the express 
provisions hereof;

     K.   the Company's franchise to be a corporation; and

     L.   all books and records;

it being understood that the Company may, however, pursuant to the 
Fifteenth Granting Clause of the Indenture, subject to the Lien of this 
Indenture any Excepted Property, whereupon the same shall cease to be 
Excepted Property.


     1.04.  Property Additions--Definition.  Paragraph A of Section 4.01 
of Article Four of the Indenture is hereby amended so as to read as follows:

          A.   The term "Property Additions" shall mean real estate
     owned in fee, easements and rights of way in respect of real
     estate, buildings, electric lines, reservoirs, structures,
     machinery, meters, equipment and other tangible properties, real,
     personal or mixed useful to the Company in the business
     (hereinafter called "Electric Business") of generation,
     transmission, distribution and/or sale of electricity, including
     whole or undivided interests in any of such properties (such
     properties being hereinafter sometimes referred to as "Electric
     Properties") purchased, constructed or otherwise acquired by the
     Company subsequent to October 31, 1941; and the term "Property
     Additions" shall include

          (1)  property of the character above described acquired
     by the Company by merger or consolidation as well as property
     purchased or constructed by the Company;

          (2)  new plants and systems of the character above
     described;

          (3)  all construction work in progress in the amount as
     recorded on the books of account of the Company under generally
     accepted accounting principles;

          (4)  property of the character above described
     constructed or acquired to replace an item of property whose
     retirement has been credited to plant account; and

          (5)  any Excepted Property and other property of the
     Company that the Company elects to be included under the Lien of
     the Indenture.

If the Company shall, as provided in Article Fourteen, consolidate with 
or merge into or convey all or substantially all of the Trust Estate as 
an entirety to any other corporation, and such successor corporation 
shall execute a supplemental indenture of the character described in 
Paragraph A of Section 14.02, all property of the character herein 
described as Property Additions and owned by such successor corporation 
at the time of such consolidation, merger or conveyance, or acquired by 
it by such consolidation, merger or conveyance (excluding Bonded Property
acquired from the Company), shall be deemed to be Property Additions 
acquired by such successor corporation at the date upon which it became 
such successor corporation.

     Among other properties not constituting Property Additions under 
the foregoing provisions, the term "Property Additions" shall not be 
deemed to include

          (7)  any item of property constructed or acquired to
     replace a similar item of property whose retirement has not been
     credited to plant account; or any property whose cost has been
     charged, or is properly chargeable, to repairs or maintenance or
     other operating expense account, or whose cost has not been
     charged, or is not properly chargeable, to plant account;

          (8)  any Excepted Property unless the Company elects to
     cause the Excepted Property to be subject to the Lien of the
     Indenture; or

          (9)  going concern value or good will, or franchises or
     governmental permits granted to or acquired by the Company,
     separate and distinct from the property operated thereunder.


     1.05.  Additions Credit not Bonded Property.  Clause (2) of Paragraph
K of Section 4.01 of Article Four is hereby amended so as read as follows:

          (2)  All Property Additions which have been made the basis
     for the authentication and delivery of Bonds or the release of
     any Bonded Property from the Lien of this Indenture or the
     withdrawal of any Bonded Cash (or Unbonded Cash, if withdrawn
     under Section 8.03) from the Trustee, but not including Additions
     Credits within the meaning of Paragraph N of this Section.


     1.06.  Addition Credit--Definition.  Paragraph N of Section 4.01 of 
Article Four of the Indenture is hereby amended so as to read as follows:

          N.   "Additions Credit."

          If and whenever any Net Bondable Additions or Gross Bondable
     Additions are certified or made a part of an application to the
     Trustee for any purpose under this Indenture, any amount is in
     excess of that required for such purpose, the excess amount shall
     constitute an Additions Credit and may be carried forward and
     used as Property Additions for additional certifications and
     applications under this Indenture.  The Company shall have the
     right, at any time and from time to time, to establish an
     Additions Credit by delivering to the Trustee the Certificates,
     Opinions and Other Instruments which would be required to be
     delivered to the Trustee under Section 4.02 B, Clauses (1)
     through (11), (13) and (14) and Sections 4.02, Paragraphs C, D
     and E of this Indenture.


     1.07.  Certifiable Net Earnings.  Paragraph O of Section 4.01 of 
Article Four of the Indenture as amended by Section 3.04 of Article Three 
of the Third Supplemental Indenture, and as amended by Section 1.03 of 
Article One of the Nineteenth Supplemental Indenture is hereby further 
amended so as to read as follows:

          O.  The "Certifiable Net Earnings" of the Company for any
     particular period shall be computed and ascertained by deducting
     from the total of the Gross Operating Revenues of the Company for
     such period the following:

          All operating expenses and other proper charges (other than
     those charged to capital accounts or surplus) including (a) all
     Federal, state and local taxes (other than taxes in respect of
     income or profits and other taxes imposed on or measured by
     income or profits); and (b) rentals, insurance, current repairs
     and maintenance; but excluding (i) provisions for reserves for
     renewals, replacements, depreciation, depletion or retirement of
     property (or any expenditures therefor), or provisions for
     amortization of property, (ii) expenses or provisions for
     interest on any indebtedness of the Company, for the amortization
     of debt discount, premium, expense or loss on reacquired debt,
     for any maintenance and replacement, improvement or sinking fund
     or other device for the retirement of any indebtedness, or for
     other amortization, (iii) expenses or provisions for any
     nonrecurring charge to income or to retained earnings of whatever
     kind or nature (including without limitation the recognition of
     expense or impairment due to the nonrecoverability of assets or
     expense), whether or not recorded as a nonrecurring charge in the
     Company's books of account, and (iv) provisions for any refund of
     revenues previously collected or accrued by the Company subject
     to possible refund.

     The Gross Operating Revenues of the Company shall consist of
Gross Utility Operating Revenues of the Company, plus the Net Non-Operating
Income of the Company.  The term "Gross Utility Operating Revenues" of the
Company shall mean the aggregate gross operating revenues derived from the
operation of the utility properties owned or leased by the Company.  The 
term "Net Non-Operating Income" of the Company shall mean net income 
derived from but not necessarily limited to the following: (a) merchandising,
jobbing and contract work; (b) rental of non-utility properties; (c) interest
and dividend income including dividends from Subsidiaries; (d) allowance for 
funds used during construction; and (e) other miscellaneous non-operating 
income; provided, however, that profits or losses resulting from the sale, 
abandonment or other disposition of capital assets or securities of the 
Company and the Company's equity in the undistributed earnings of 
Subsidiaries, shall not be taken into account in the calculation of Net 
Non-Operating Income.

     Subject to the foregoing provisions of this Section, all determinations
of earnings pursuant to this Indenture shall be made, and all balance sheets
and other financial statements to be delivered hereunder shall be prepared,
in accordance with the practice prescribed by any regulatory authority having
jurisdiction over the Company or other lawfully prescribed practice or, in
the absence of any practice prescribed by law, in accordance with sound 
accounting practice and, where consistent with such practice and with the 
foregoing provisions of this Section, on the same basis as that used in 
preparing the financial statements included in the annual report of the 
Company for the preceding fiscal year.


     1.08.  Property Additions Certificate--Amendment to Conform to Other 
Provisions.  Clauses (10) and (12) of Paragraph B of Section 4.02 of 
Article Four of the Indenture is hereby amended so as to read as follows:

          (10) That no part of the Property Additions described in
     said Certificate is property the construction or acquisition of
     which under the provisions of Section 4.01 is not permitted to be
     made the basis of the authentication and delivery of Bonds under
     this Article.

          (12) Whether there is any unused Additions Credit which the
     Company desires to use, in whole or in part, as a basis for the
     authentication and delivery of the Bonds then applied for, and if
     so, a statement of the entire amount which the Company so desires
     to use, of each such unused Additions Credit.


     1.09.  Earnings-to-Interest Coverage Requirements.  Paragraph F 
of Section 4.02 of Article Four of the Indenture as previously amended 
by Section 1.04 of the Nineteenth Supplemental Indenture is hereby 
amended so as to read as follows:

          F.   A Net Earnings Certificate of the Company, complying
     with the provisions of Section 1.02, dated not more than 45 days
     prior to the application for the authentication and delivery of
     such Bonds, certified by an Accountant, and setting forth:

          (1)  The amount of the Certifiable Net Earnings of the
     Company, for a period of 12 consecutive calendar months within
     the 18 calendar months immediately preceding the date on which
     the application for the authentication and delivery of the Bonds
     is made, and stating separately the Gross Utility Operating
     Revenues and the Net Non-Operating Income and the operating
     expenses of the Company and other deductions from such Gross
     Utility Operating Revenues and Net Non-Operating Income pursuant
     to Paragraph O of Section 4.01, with the principal subdivisions
     thereof.

          (2)  The aggregate amount of the annual "Interest Charges on 
     Bonds and Prior Lien Debt" of the Company, which term shall mean 
     the annual interest charges on 

               (a)  all Bonds outstanding hereunder at the date
     of said Certificate, provided, however, that in the case of any
     Bonds which shall at such time be pledged as security for any
     indebtedness of the Company, the amount of the annual interest
     charges on such pledged Bonds shall be deemed to be either the
     amount of the annual interest charges on such indebtedness or the
     amount of the annual interest charges on such pledged Bonds,
     whichever shall be greater; and

               (b)  all Bonds the authentication and delivery of
     which is applied for in such application and in any other pending
     application; and

               (c)  all indebtedness secured by a lien upon the
     Trust Estate, or any part thereof, prior to the lien of this
     Indenture, other than a Prepaid Lien;

     provided, however, that there shall be excluded from such
     computation the annual interest charges on any Bonds or
     indebtedness which is to be paid, redeemed or otherwise retired,
     or provision for the retirement of which is to be made, so that
     the same will cease to be outstanding prior to or concurrently
     with the authentication and delivery of the Bonds then applied
     for.

          (3)  That the amount of the Certifiable Net Earnings of
     the Company set forth as provided by Clause (1) of this Paragraph
     have been at least equal to two (2) times the aggregate amount of
     the annual Interest Charges on Bonds and Prior Lien Debt of the
     Company as provided by Clause (2) of this Paragraph.

          (4)  That such Certifiable Net Earnings have been
     computed and ascertained as provided in Paragraph O of Section
     4.01.

     If the annual Interest Charges on Bonds and Prior Lien Debt
shall be increased after the date of the Earnings Certificate hereinabove 
in this Paragraph described, and before the authentication and delivery 
of the Bonds then applied for, the Company will file with the Trustee a 
new Earnings Certificate showing the amount of said annual Interest 
Charges on Bonds and Prior Liens as so increased--it being the intention 
hereof that no Bonds shall be authenticated and delivered under the
provisions of this Article, unless the ratio provided for by Clause (3) 
of this Paragraph shall have been established with respect to the 
aggregate amount of the annual Interest Charges on Bonds and Prior Liens 
of the Company as constituted at the time of the authentication and 
delivery of the Bonds then applied for; but the Trustee shall, subject 
to the provisions of Section 15.02, be entitled to assume, in the 
absence of such new Earnings Certificate, that the aggregate amount of 
the annual Interest Charges on Bonds and Prior Lien Debt of the Company, as
constituted at the time of the authentication and delivery of the Bonds 
then applied for, are as stated in the Earnings Certificate filed with 
the Trustee as aforesaid.

     The Earnings Certificate provided for in this Paragraph shall be 
certified by an Independent Public Accountant selected by the Company and 
approved by the Trustee, in the exercise of reasonable care, if, but 
only if, the aggregate principal amount of the Bonds to be authenticated 
and delivered on the basis thereof and of other Bonds authenticated 
and delivered since the commencement of the then current calendar year 
(other than those with respect to which an Earnings Certificate is not 
required or with respect to which an Earnings Certificate verified by an
Independent Public Accountant has previously been furnished) is 10% or 
more of the aggregate principal amount of the Bonds at the time outstanding.


     1.10.  Summary Certificate.  Paragraph G of Section 4.02 of Article 
Four of the Indenture is hereby amended so as to read as follows:

          G.   A summary certificate and computation of the Company
     complying with the provisions of Section 1.02, determining the
     Net Bondable Additions in conformity with the provisions of this
     Indenture as amended.


     1.11.  Amount of Property Additions Required for New Bonds.  Section
4.03 of Article Four of the Indenture is hereby amended so as to read as 
follows:

          SECTION 4.03.  Upon compliance with the provisions of
     Section 4.02, the Trustee shall authenticate and deliver Bonds in
     an aggregate principal amount up to, but not exceeding seventy
     percent (70%) of the amount of Net Bondable Additions shown by
     the summary certificate and computation filed pursuant to
     Paragraph G of Section 4.02.


     1.12.  Additional Authorization to Issue Bonds.  The Indenture is 
amended by the addition of the following Section 4.04 to Article Four of 
the Indenture.

          SECTION 4.04.  Notwithstanding anything in this Indenture to
     the contrary, upon the Written Order of the Company, the Trustee
     shall authenticate and deliver Bonds in an aggregate principal
     amount up to, but not exceeding seventy percent (70%) of

          A.   the total amount of Property Additions which the
     Company certifies to the Trustee as of May 1, 1994 and as of each
     May 1 thereafter to meet the requirements of Section 9.06 until
     such time that Section 9.06 is deleted by the execution of the
     Twenty Eighth Supplemental Indenture; and

          B.   fourteen and two-tenths percent (14.2%) of the total
     amount of all Property Additions certified to the Trustee and
     used as Bondable Additions for the issuance of Bonds during the
     period beginning May 1, 1994 and ending on the execution date of
     the Twenty Eighth Supplemental Indenture.

     The Company shall furnish the Trustee a Certificate of the Company 
referencing and documenting the amount of Property Additions previously 
certified and used as provided at Paragraphs A and B of this Section, a 
summary certificate and computation determining the amount of Bonds that 
may be issued under this Section 4.04 and an Opinion of Counsel as 
required by Paragraph I of Section 4.02; provided that subparagraph (1) 
thereunder shall refer to the basis of this Section 4.04 rather than Net 
Bondable Additions and subparagraphs (2), (3), (4) and (5) are not to be
included in such opinion.


     1.13.  Release of Property from Indenture.  Section 7.02 of Article 
Seven of the Indenture is hereby amended so as to read as follows:


          SECTION 7.02.

          A.   Definition of "Fair Value."  For the purposes of this
     Section 7.02, "Fair Value" when applied to property is its value
     as determined without deduction for any Prior Liens upon such
     property and without deduction to reflect that such property may
     be of value only to the Company or another operator of the Trust
     Estate as a whole, which value may be determined without physical
     inspection by use of accounting and engineering records and other
     data maintained by, or available to, the Company.

          B.   Release Based on Bond Ratio.  Unless an Event of
     Default shall have occurred and be continuing, upon receipt of a
     Written Order of the Company requesting the release of any of the
     Trust Estate pursuant to this Paragraph B, the Trustee shall
     execute and deliver to the Company the documents and instruments
     described in Paragraph B, releasing from the Lien of this
     Indenture any of the Trust Estate if the Fair Value of all of the
     Trust Estate (excluding the Trust Estate to be released but
     including any Trust Estate to be acquired by the Company with the
     proceeds of, or otherwise in connection with, such release)
     stated on the Engineer's certificates delivered pursuant to
     Clause 2 of Paragraph B and Clause (3) of Paragraph B, equals or
     exceeds an amount equal to twenty-fourteenths (20/14) of the
     aggregate principal amount of Bonds outstanding at the date of
     such Written Order of the Company as stated on the Certificate of
     the Company delivered pursuant to Clause (4) of Paragraph B, upon
     receipt by the Trustee of:

          (1)  appropriate documents and instruments releasing
     without recourse the interest of the Trustee in the Trust Estate
     to be released, and describing in reasonable detail the Trust
     Estate to be released;

          (2)  an Engineer's certificate, dated the date of such
     Written Order of the Company, stating (i) that the signers of
     such Engineer's certificate have examined the Certificate of the
     Company delivered pursuant to Clause (4) of Paragraph B in
     connection with such release, (ii) the Fair Value, in the opinion
     of the signer of such Engineer's certificate, of (A) all of the
     Trust Estate, and (B) the Trust Estate to be released, in each
     case as of a date not more than 90 days prior to the date of such
     Written Order of the Company, and (iii) that in the judgment of
     such signers, such release (A) will not materially adversely
     affect the Company's Electric Business, and (B) will not impair
     the security under this Indenture in contravention of the
     provisions hereof;

          (3)  in case any Property Additions are being acquired
     by the Company with the proceeds of, or otherwise in connection
     with, such release, an Engineer's certificate, dated the date of
     such Written Order of the Company, as to the Fair Value, as of a
     date not more than 90 days prior to the date of such Written
     Order of the Company, of the Property Additions being so acquired
     (and if within six months prior to the date of acquisition by the
     Company of the Property Additions being so acquired, any property
     included within such Property Additions had been used or operated
     by others than the Company in a business similar to that in which
     it has been or is to be used or operated by the Company, and the
     Fair Value thereof to the Company, as set forth in such
     Engineer's certificate, is not less than one percent (1%) of the
     aggregate principal amount of Bonds then outstanding, such
     certificate shall be an Independent Engineer's Certificate); 

          (4)  a Certificate of the Company, dated the date of
     such Written Order of the Company, stating (i) that the aggregate
     principal amount of Bonds outstanding at the date of such Written
     Order of the Company, and stating that the Fair Value of all of
     the Trust Estate (excluding the Trust Estate to be released but
     including any Property Additions to be acquired by the Company
     with the proceeds of, or otherwise in connection with, such
     release) stated on the Engineer's certificate filed pursuant to
     Clause (2) of Paragraph B equals or exceeds an amount equal to
     twenty-fourteenths (20/14) of such aggregate principal amount,
     and (ii) that, to the knowledge of the signer, no Event of
     Default has occurred and is continuing; and

          (5)  an Opinion of Counsel complying with the
      provisions of Section 1.02 stating that the instruments which
      have been or are delivered to the Trustee conform to the
      requirements of this Indenture and constitute sufficient
      authority under this Indenture for the Trustee to execute and
      deliver the release requested.


          C.   Release up to a Limited Amount.  If the Company is
      unable, or elects not, to obtain, in accordance with the
      preceding Paragraph B, the release from the Lien of this
      Indenture of any of the Trust Estate, unless an Event of Default
      shall have occurred and be continuing, upon receipt of a Written
      Order of the Company requesting the release of any of the Trust
      Estate pursuant to this Paragraph C, the Trustee shall execute
      and deliver to the Company the documents and instruments
      described in Clause (1) of Paragraph C releasing from the Lien of
      this Indenture any of the Trust Estate if the Fair Value thereof,
      as stated on the Engineer's certificate delivered pursuant to
      Clause (2) of Paragraph C is less than one percent (1%) of the
      aggregate principal amount of Bonds outstanding at the date of
      such Written Order of the Company, provided that the aggregate
      Fair Value of all Trust Estate released pursuant to this
      Paragraph C, as stated on all Engineer's certificates filed
      pursuant to this Paragraph C in any period of 12 consecutive
      calendar months which includes the date of such Engineer's
      certificate, shall not exceed three percent (3%) of the aggregate
      principal amount of Bonds outstanding at the date of such Written
      Order of the Company as stated in the Certificate of the Company
      delivered pursuant to Clause (3) of Paragraph C, upon receipt by
      the Trustee of:

          (1)  appropriate documents and instruments releasing
      without recourse the interest of the Trustee in the Trust Estate
      to be released, and describing in reasonable detail the Trust
      Estate to be released;

          (2)  an Engineer's certificate, dated the date of such
      Written Order of the Company, stating (i) that the signer of such
      Engineer's certificate has examined the Certificate of the
      Company delivered pursuant to Clause (2) of Paragraph C in
      connection with such release, (ii) the Fair Value, in the opinion
      of the signers of such Engineer's certificate, of such Trust
      Estate to be released as of a date not more than 90 days prior to
      the date of such Written Order of the Company, and (iii) that in
      the judgment of such signers, such release (A) will not
      materially adversely affect the Company's Electric Business and
      (B) will not impair the security under this Indenture in
      contravention of the provisions hereof;

          (3)  a Certificate of the Company, dated the date of
      such Written Order of the Company, stating (i) the aggregate
      principal amount of Bonds outstanding at the date of such Written
      Order of the Company, (ii) that one percent (1%) of such
      aggregate principal amount exceeds the Fair Value of the Trust
      Estate for which such release is applied for, (iii) that three
      percent (3%) of such aggregate principal amount exceeds the
      aggregate Fair Value of all Trust Estate released from the Lien
      of this Indenture pursuant to this Paragraph C, as shown by all
      Engineer's certificates filed pursuant to Clause (2) of Paragraph
      C in such period of 12 consecutive calendar months, and (iv)
      that, to the knowledge of the signer, no Event of Default has
      occurred and is continuing; and 

          (4)  an Opinion of Counsel complying with the
      provisions of Section 1.02 stating that the instruments which
      have been or are delivered to the Trustee conform to the
      requirements of this Indenture and constitute sufficient
      authority under this Indenture for the Trustee to execute and
      deliver the release requested.


          D.   Release by Deposit of Cash, Purchase Money Obligations
      or Property Additions.  If the Company is unable, or elects not,
      to obtain, in accordance with Paragraphs B or C, the release from
      the Lien of this Indenture of any of the Trust Estate, unless an
      Event of Default shall have occurred and be continuing, upon
      receipt and deposit of a Written Order of the Company requesting
      the release of any of the Trust Estate pursuant to this Paragraph
      D and those items at Clause (2) in this Paragraph D, the Trustee
      shall execute and deliver to the Company the documents and
      instruments described in Clause (1) of Paragraph D releasing from
      the Lien of this Indenture the Trust Estate described in the
      Written Order of the Company.

          (1)  appropriate documents and instruments releasing
      without recourse the interests of the Trustee in the Trust Estate
      to be released, and describing in reasonable detail the Trust
      Estate to be released;

          (2)  Cash in an amount equal to the greater of the
      following items (i) and (ii):

               (i)  the Fair Value of the property to be
      released, or

               (ii) the consideration received or to be received
      by the Company therefor (valuing purchase money obligations at
      their principal amount and property received in exchange at its
      Fair Value as stated in said certificate),

               provided, however, that in lieu of all or any part
      of such cash, the Company shall have the right to deposit with or
      deliver to the Trustee any of the following:

                    (a)  Purchase Money Obligations secured by a
      mortgage on the property to be released, or a portion thereof,
      not exceeding in principal amount seventy percent (70%) of the
      Fair Value (as certified as above set forth) of the property
      covered by such purchase money mortgage, which purchase money
      obligations and the mortgages securing the same, shall be duly
      assigned to the Trustee and shall be received by the Trustee at
      the principal amount thereof in lieu of cash; provided, however,
      that the Trustee shall not accept any such purchase money
      obligations in lieu of cash as provided in this Clause if thereby
      the aggregate principal amount of all purchase money obligations
      received by the Trustee pursuant to this Clause and at the time
      held by the Trustee would equal or exceed 10 percent of the
      principal amount of all Bonds then outstanding hereunder.

                    (b)  A Certificate of the trustee or other
      holder of a Prior Lien on all or any part of the property to be
      released, stating that a specific amount of cash and/or a
      specified principal amount of purchase money obligations of the
      character described in subparagraph (a) of this Clause and
      representing proceeds of the sale of such property, have been
      deposited with such trustee or other holder pursuant to the
      requirements of such Prior Lien, provided, however, that the
      aggregate of the cash and principal amount of purchase money
      obligations so certified at any one time shall in no event exceed
      the principal amount of the Prior Lien Obligations outstanding
      thereunder, less any amounts then held by the trustee or other
      holder of such Prior Lien other than for the payment or
      redemption of Prior Lien Obligations not deemed outstanding under
      the provisions of Section 4.01; and such certificate shall be
      received by the Trustee in lieu of cash equal to the cash and the
      principal amount of the purchase money obligations so certified
      to have been deposited with such trustee or other holder of such
      Prior Lien.

                    (c)  The Certificates, Opinions and Other
      Instruments which the Company would be required to furnish to the
      Trustee, upon an application for the authentication and delivery
      of Bonds on the basis of Property Additions under Article Four,
      but with the following variations and omissions of the
      instruments specified in Section 4:02:

               (i)  There shall be an additional statement in
      Clause (2) of the Property Additions Certificate, to the effect
      that no part of the Property Additions therein described has in
      any other previous or then pending application been made the
      basis for the release of any Unbonded Property from the lien of
      this Indenture or for the withdrawal of any Unbonded Cash from
      the Trustee or from the trustee or other holder of a Prior Lien,
      or to repair, replace, or restore insured Unbonded Property which
      shall have been damaged or destroyed but the proceeds of the
      insurance on which shall not have been required to be paid to the
      Trustee pursuant to the provisions of Section 9.10;

               (ii) It shall not be necessary for the Company to
      deliver to the Trustee the Resolution required by Paragraph A,
      the Retirements Certificate required by Paragraph E, the Net
      Earnings Certificate required by Paragraph F, or any of the
      certificates or parts of the Opinion of Counsel referred to in
      Clauses (6) and (7) of Paragraph I of Section 4.02;

               (iii)     The Summary Certificate required by
      Paragraph G of Section 4.02 shall show only Gross Bondable
      Additions and may include any Additions Credit; and

               (iv) If no part of the property to be released is
      Bonded Property and such property or any part thereof is subject
      to a Prior Lien, the Property Additions then so certified may be
      subject to the same Prior Lien, and the Property Additions
      Certificate required by Paragraph B of Section 4.02 and the
      Opinion of Counsel required by Paragraph I of Section 4.02 may be
      modified accordingly.

                    Such Certificates, Opinions and Other
      Instruments shall be received by the Trustee in lieu of cash up
      to the amount of the Gross Bondable Additions so certified to the
      Trustee.

          (3)  An Opinion or Opinions of Counsel, complying with
      the provisions of Section 1.02,

               (a)  stating that the instruments which have been
      or are therewith delivered to the Trustee conform to the
      requirements of this Indenture and constitute sufficient
      authority under this Indenture for the Trustee to execute and
      deliver the release requested, and that, upon the basis of the
      cash, purchase money obligations, certificates, opinions and
      other instruments delivered to the Trustee pursuant to Paragraph
      D of this Section, the property so sold or disposed of or
      contracted to be sold or disposed of may lawfully be released
      from the lien of this Indenture pursuant to the provisions of
      this Section;

               (b)  stating that the purchase money obligations,
      if any, delivered to the Trustee or to the trustee or other
      holder of a Prior Lien pursuant to subparagraph (a) of Clause (2)
      of Paragraph D of this Section are valid obligations and are duly
      secured by a valid purchase money mortgage constituting a direct
      lien upon all the property to be released, or upon the portion
      thereof described, free and clear of all prior liens, charges or
      encumbrances, except any Prior Liens or other charges or
      encumbrances prior to the lien of this Indenture which may have
      existed on the property to be released immediately prior to such
      release and that the assignment of any mortgage securing such
      purchase money obligations is valid and in recordable form; and

               (c)  in case, pursuant to subparagraph (a) of
      Clause (2) of Paragraph D of this Section, any cash or purchase
      money obligations shall be certified to have been deposited with
      the trustee or other holder of a Prior Lien, stating that the
      property to be released, or a specified portion thereof, is or
      immediately before such sale or disposition was subject to such
      Prior Lien and that such deposit is required by such Prior Lien.

          E.   References to Other Sections of Article Seven.  In
      Section 7.04 of the Indenture, the reference to Paragraph B of
      Section 7.02 and Clause (8) is deleted.  In Section 7.05 of the
      Indenture, the reference to the Resolution of the Board required
      by Section 7.02 shall mean Written Order of the Company.


     1.14.  Deletion of Release up to $5,000.  Section 7.08 of Article 
Seven of the Indenture is hereby deleted from the Indenture.  All 
references to Section 7.08 in Article Seven of the Indenture are deleted 
from the Indenture.


     1.15.  Amendment of Redemption of Bonds Because of Eminent Domain.  
Section 8.08(b) of Article Eight of the Indenture is amended so as to read 
as follows:

          (b)  In case of the sale and release of, or the taking by eminent 
     domain or of the purchase by a public authority (pursuant to any right 
     which it may then have to make such purchase) of the entire Trust Estate, 
     then all Trust Moneys representing the proceeds thereof received by the 
     Trustee shall be applied by the Trustee in accordance with the provisions 
     of Section 8.05 to the redemption of Bonds outstanding hereunder 
     (prorated between or among the several series, according to the principal 
     amount of Bonds outstanding of each series, if Bonds of more than one
     series be outstanding) at such then applicable redemption prices, in such 
     manner and upon such notice (which shall be given by the Trustee for 
     and on behalf of the Company, and in the name of the Company) as may 
     be specified in respect of said Bonds of each series in this 
     Indenture or in any applicable indenture supplemental hereto.


     1.16.  Deletion of 15% Maintenance Requirement.  Section 9.06 of 
Article Nine of the Indenture is hereby deleted from the Indenture.


     1.17.  Increasing Insured Loss Retention.  The third sentence of 
Section 9.10 of Article Nine of the Indenture as previously amended by 
Section 1.04 of the Fifteenth Supplemental Indenture is further amended 
so as to read as follows:

          All policies or other contracts for insurance upon the
     Trust Estate shall provide that any loss in excess of Five
     Million Dollars shall be payable to the Trustee as its interest
     may appear, or to the trustee or other holder of any Prior Lien
     if required by the terms thereof; and, if so requested in writing
     by the Trustee, the Company will, subject to the provisions of
     any Prior Lien, cause policies for such insurance to be delivered
     to the Trustee.

     The last paragraph of Section 9.10 of Article Nine of the Indenture 
as previously amended by Section 1.05 of the Fifteenth Supplemental 
Indenture is further amended by substituting the number $5,000,000 for 
the number $1,000,000 therein.


     1.18.  Deletion of Limitations on Prior Liens.  Section 9.15
of Article Nine of the Indenture is hereby deleted from the Indenture.


     1.19.  Restrictions on Dividends.  Section 9.16 of Article Nine of 
the Indenture as amended by Section 3.06 of the Third Supplemental 
Indenture, Section 1.06 of the Fifteenth Supplemental Indenture and 
Section 1.02 of the Twenty Second Supplemental Indenture is further 
amended so as to read as follows:

          Other than dividends payable solely in shares of its
     common stock, the Company may declare and pay dividends in cash
     or property on any shares of its common stock only out of the
     unreserved and unrestricted retained earnings of the Company and
     shall not make any such declaration or payment when the Company
     is insolvent, or when the payment thereof would render the
     Company insolvent.


     1.20.  Deletion of Restrictions on Investments in Affiliates and 
Prohibiting Subsidiaries from Engaging in Electric Business.  Section 
9.20 of Article Nine of the Indenture is hereby deleted from the 
Indenture.


     1.21.  Deletion of Restrictions on Investments in Subsidiaries.  
Section 9.21 of Article Nine of the Indenture as amended by Section 1.07 
of the Fifteenth Supplemental Indenture, Section 1.06 of the Eighteenth 
Supplemental Indenture, Section 1.03 of the Twenty Second Supplemental 
Indenture and Section 1.02 of the Twenty Fourth Supplemental Indenture 
is hereby deleted from the Indenture.


     1.22.  Annual Compliance Certificate to Conform to the Amendments.  
Section 9.22 of Article Nine of the Indenture is amended so as to read 
as follows:

          SECTION 9.22.  On or before May 1 in each calendar
     year, or on or before such other date in each calendar year as
     the Company and the Trustee may agree upon, the Company will
     deliver to the Trustee a Certificate of the Company, complying
     with the provisions of Section 1.02, with respect to the
     compliance by the Company with the covenants contained in
     Sections 9.04, 9.05, 9.07, 9.08, 9.11, 9.12, and 9.13, and the
     Company covenants and agrees to notify the Trustee immediately
     upon the occurrence of any event which constitutes an Event of
     Default (as defined in Section 12.01 hereof) or which may
     constitute an Event of Default as the result of the giving of a
     notice and/or expiration of a period of grace.


     1.23.  Noncertificated System for Registration and Restatement of 
the Indenture.  Section 17.01 of the Indenture is amended so as to add 
thereto the following additional Paragraphs J and K:

          J.   To provide for the procedures required to permit
     the Company to utilize, at its option, a noncertificated system
     of registration for all, or any series of the Bonds.
 
          K.   To enter into a restatement of the Indenture
     without material modifications and including all amendments
     contained in supplements that remain in effect, with authority to
     reorganize material, renumber and letter, include reference
     headings and remove language no longer applicable and clarify any
     ambiguities in the Indenture as amended.


                               ARTICLE TWO

                         Miscellaneous Provisions

     2.01.  Headings at the beginning of each Section are included for 
convenience of reference, and such headings are not intended to be used 
to interpret this Supplemental Indenture.

     2.02.  The Company, by the execution hereof, acknowledges that a 
true copy of this Supplemental Indenture has been delivered to and 
received by it.

     2.03.  Except as heretofore amended and as amended by this 
Supplemental Indenture, all the provisions, terms and conditions of the 
Original Indenture shall continue in full force and effect.

     2.04.  The recitals contained in this Supplemental Indenture shall 
be taken as the statements of the Company, and the Trustee assumes no 
responsibility for their correctness.

     2.05.  This Supplemental Indenture may be executed in several 
counterparts, all or any of which may be treated for all purposes as one 
original and shall constitute and be one and the same instrument.

     IN WITNESS WHEREOF, BLACK HILLS CORPORATION, party hereto of
the first part, has caused this Supplemental Indenture to be executed on 
its behalf by its President or one of its Vice Presidents and its 
corporate seal to be hereto affixed and to be attested by its Secretary 
or an Assistant Secretary, and CHEMICAL BANK, party hereto of the second 
part, in evidence of its acceptance of the trust hereby created, has 
caused this Supplemental Indenture to be executed on its behalf by one of its
Vice Presidents or Assistant Vice Presidents and its corporate seal to be 
hereto affixed and to be attested by its Secretary or an Assistant 
Secretary or a Trust Officer duly authorized, all as of the day and 
year first above written.

                              BLACK HILLS CORPORATION
(CORPORATE SEAL)

                                
                              By_________________________________
                                Its____________________________
ATTEST:

____________________________

Signed, sealed and delivered by
BLACK HILLS CORPORATION
in the presence of


_____________________________


_____________________________

                              CHEMICAL BANK


                              By_________________________________
                                  Its____________________________
ATTEST:

_____________________________
Its__________________________

Signed, sealed and delivered by
CHEMICAL BANK
in the presence of:


_____________________________


_____________________________


STATE OF SOUTH DAKOTA

COUNTY OF PENNINGTON

     On the _____ day of ___________, 1994, before me, 
________________________, the undersigned officer, personally appeared 
______________________, to me personally known, who acknowledged h__self 
to be, and being by me duly sworn, did say that _he is 
_____________________ of BLACK HILLS CORPORATION, a corporation, and that 
the seal affixed to the foregoing instrument is the corporate seal of 
said corporation and that said instrument was executed by, and signed in 
the name of, the corporation, by h__, as such __________________________ and
sealed in behalf of the corporation by authority of its Board of Directors 
for the purposes therein contained, and the said ________________________ 
acknowledged the same as the free act and deed of said corporation.

     IN WITNESS WHEREOF, I hereunto set my hand and official seal.



                              ___________________________________
                              NOTARY PUBLIC
(SEAL)


STATE OF NEW YORK

COUNTY OF NEW YORK

     On this _______ day of ________________, 1994, before me,
____________________, the undersigned officer, personally appeared 
____________________, to me personally known, who acknowledged himself to 
be, and being by me duly sworn, did say that he is 
______________________________ of CHEMICAL BANK, a corporation, and that 
the seal affixed to the foregoing instrument is the corporate seal of 
said corporation and that said instrument was executed by, and signed in 
the name of, the corporation, by him, as such _____________________________ 
and sealed in behalf of the corporation by authority of its Board of
Directors for the purposes therein contained, and the said
______________________ acknowledged the same as the free act and deed of 
said corporation.

     IN WITNESS WHEREOF, I hereunto set my hand and official seal.



                              ___________________________________
                              NOTARY PUBLIC
(SEAL)


<TABLE>

<CAPTION>
RATIO OF EARNINGS TO FIXED CHARGES                  EXHIBIT 12.01
(amounts in thousands)

                                                    Twelve Months
                                                    Ended 6/30/94

<S>                                                    <C>
Pre-Tax Income From
 Continuing Operations                                 $31,719
                                                       -------
Fixed Charges:
  Interest Expense                                       8,765
  Amortization of Debt Expense                             118
  Imputed Interest From
   Capitalized Lease                                         -
                                                       -------
                                                         8,883
                                                       -------
Total Earnings Plus Fixed Charges                      $40,602
                                                       =======                    
Total Fixed Charges                                    $ 8,883
                                                       =======
Ratio of Earnings to Fixed Charges                         4.6

</TABLE>


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