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                                   PACIFICORP
                            (AN OREGON CORPORATION)

                                       TO

                         MORGAN GUARANTY TRUST COMPANY
                                  OF NEW YORK
                            (A NEW YORK CORPORATION)

                   WHICH HEREIN RESIGNS AS CORPORATE TRUSTEE

                                      AND
                                 CHEMICAL BANK
                            (A NEW YORK CORPORATION)

                 HEREIN BECOMING SUCCESSOR CORPORATE TRUSTEE TO
                   MORGAN GUARANTY TRUST COMPANY OF NEW YORK

                                AS TRUSTEE UNDER PACIFIC POWER &
                                  LIGHT COMPANY'S MORTGAGE AND
                                  DEED OF TRUST, DATED AS OF
                                  JULY 1, 1947

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

                       FIFTY-THIRD SUPPLEMENTAL INDENTURE
                           DATED AS OF AUGUST 1, 1994

                SUPPLEMENTAL TO PACIFIC POWER & LIGHT COMPANY'S
                           MORTGAGE AND DEED OF TRUST
                            DATED AS OF JULY 1, 1947

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

      THIS INSTRUMENT GRANTS A SECURITY INTEREST BY A TRANSMITTING UTILITY
          THIS INSTRUMENT CONTAINS AFTER-ACQUIRED PROPERTY PROVISIONS

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                       FIFTY-THIRD SUPPLEMENTAL INDENTURE

    THIS  INDENTURE,  dated  as of  the  1st  day of  August,  1994 (hereinafter
referred to as the "Fifty-third Supplemental Indenture") is made as a supplement
to that  certain Mortgage  and Deed  of  Trust, dated  as of  July 1,  1947,  as
heretofore  amended and supplemented (the "Mortgage"), executed and delivered by
Pacific Power & Light Company, a  Maine corporation that heretofore changed  its
name to PacifiCorp (the "Original Mortgagor").

    This  Fifty-third Supplemental  Indenture is entered  into by  and among (a)
PACIFICORP, a  corporation  of the  State  of  Oregon into  which  the  Original
Mortgagor  heretofore was merged,  whose address is  700 NE Multnomah, Portland,
Oregon 97232 (the "Company"); (b) MORGAN  GUARANTY TRUST COMPANY OF NEW YORK,  a
New  York corporation whose address is 60  Wall Street, New York, New York 10260
(the  "Resigning  Corporate  Trustee");  and  (c)  CHEMICAL  BANK,  a  New  York
corporation whose address is 450 West 33rd Street, New York, New York 10001 (the
"Successor Corporate Trustee" or "Trustee").

    WHEREAS,  the Mortgage  (including all indentures  supplemental thereto) was
recorded in the official  records of the States  of California, Idaho,  Montana,
Oregon,  Utah, Washington and Wyoming and various counties within said states in
which this Fifty-third Supplemental Indenture is  to be recorded, and was  filed
as  a financing statement in accordance with the Uniform Commercial Code of each
of said states; and

    WHEREAS, the Original Mortgagor executed, delivered, recorded and filed  its
Supplemental Indentures as follows:



                              DATED AS OF
                       -------------------------
                    
First                  April 1, 1950
Second                 March 1, 1952
Third                  September 1, 1952
Fourth                 April 1, 1954
Fifth                  August 1, 1954
Sixth                  October 1, 1955
Seventh                January 1, 1957
Eighth                 September 1, 1957
Ninth                  January 1, 1958
Tenth                  July 1, 1958



                                       2



                              DATED AS OF
                       -------------------------
                    
Eleventh               September 1, 1960
Twelfth                June 22, 1961
Thirteenth             April 1, 1962
Fourteenth             December 1,1962
Fifteenth              April 1, 1963
Sixteenth              August 1, 1963
Seventeenth            October 1, 1964
Eighteenth             October 1, 1965
Nineteenth             December 15, 1967
Twentieth              May 1, 1969
Twenty-first           November 1, 1969
Twenty-second          July 1, 1970
Twenty-third           February 1, 1971
Twenty-fourth          October 1, 1971
Twenty-fifth           October 1, 1972
Twenty-sixth           January 1, 1974
Twenty-seventh         October 1, 1974
Twenty-eighth          May 1, 1975
Twenty-ninth           January 1, 1976
Thirtieth              July 1, 1976
Thirty-first           December 1, 1976
Thirty-second          January 1, 1977
Thirty-third           November 1, 1977
Thirty-fourth          April 1, 1979
Thirty-fifth           October 1, 1980
Thirty-sixth           March 1, 1981
Thirty-seventh         October 15, 1981
Thirty-eighth          August 1, 1982
Thirty-ninth           April 1, 1983
Fortieth               March 1, 1986
Forty-first            July 1, 1986
Forty-second           July 1, 1987;


and

                                       3

    WHEREAS,  the Original Mortgagor  has heretofore issued,  in accordance with
the provisions of  the Mortgage,  bonds entitled and  designated First  Mortgage
Bonds, of the Series and in the principal amounts as follows:



                                                                AGGREGATE
                                                             PRINCIPAL AMOUNT   AGGREGATE PRINCIPAL
           SERIES                              DUE DATE           ISSUED        AMOUNT OUTSTANDING
           -------------------------------  --------------  ------------------  -------------------
                                                                    
1.         First--3 1/4%                              1977   $      38,000,000                   0
2.         Second--3%                                 1980           9,000,000                   0
3.         Third--3 5/8%                              1982          12,500,000                   0
4.         Fourth--3 3/4%                         9/1/1982           7,500,000                   0
5.         Fifth--3 3/8%                              1984           8,000,000                   0
6.         Sixth--3 1/2%                          8/1/1984          30,000,000                   0
7.         Seventh--3 5/8%                            1985          10,000,000                   0
8.         Eighth--5 3/8%                             1987          12,000,000                   0
9.         Ninth--5 3/4%                          9/1/1987          20,000,000                   0
10.        Tenth--4 1/4%                              1988          15,000,000                   0
11.        Eleventh--4 3/8%                       7/1/1988          20,000,000                   0
12.        Twelfth--5 1/8%                            1990          20,000,000                   0
13.        Thirteenth--4 3/4%                         1992          35,000,000                   0
14.        Fourteenth--4 1/2%                    12/1/1992          32,000,000                   0
15.        Fifteenth--3 5/8%                     11/1/1974          11,434,000                   0
16.        Sixteenth--3 5/8%                      4/1/1978           4,500,000                   0
17.        Seventeenth--3 3/8%                    8/1/1979           4,951,000                   0
18.        Eighteenth--4 1/8%                     6/1/1981           5,849,000                   0
19.        Nineteenth--4 1/8%                    10/1/1982           6,157,000                   0
20.        Twentieth--3 3/4%                      3/1/1984           8,659,000                   0
21.        Twenty-first--4 3/8%                   5/1/1986          14,454,000                   0
22.        Twenty-second--4 5/8%                      1993          30,000,000                   0
23.        Twenty-third--4 5/8%                       1994          30,000,000   $      20,261,000
24.        Twenty-fourth--5%                          1995          30,000,000          14,168,000
25.        Twenty-fifth--8%                           1999          25,000,000                   0
26.        Twenty-sixth--8 3/4%                  11/1/1999          20,000,000                   0
27.        Twenty-seventh--9 5/8%                     2000          25,000,000                   0
28.        Twenty-eighth--7 7/8%                      2001          40,000,000                   0
29.        Twenty-ninth--8%                      10/1/2001          35,000,000                   0
30.        Thirtieth--7 3/4%                          2002          30,000,000          19,744,000
31.        Thirty-first--8 3/8%                       2004          60,000,000                   0
32.        Thirty-second--9 7/8%                      1983          70,000,000                   0
33.        Thirty-third--10 3/4%                      1990          60,000,000                   0



                                       4



                                                                AGGREGATE
                                                             PRINCIPAL AMOUNT   AGGREGATE PRINCIPAL
           SERIES                              DUE DATE           ISSUED        AMOUNT OUTSTANDING
           -------------------------------  --------------  ------------------  -------------------
                                                                    
34.        Thirty-fourth--10%                         2006          75,000,000                   0
35.        Thirty-fifth--7 3/4%                   7/1/2006          35,000,000                   0
36.        Thirty-sixth--8 5/8%                  12/1/2006          50,000,000                   0
37.        Thirty-seventh--6 3/8%                 1/1/2007          17,000,000   $       8,190,000
38.        Thirty-eighth--8 7/8%                 11/1/2007         100,000,000                   0
39.        Thirty-ninth--10 1/4%                      2009         100,000,000                   0
40.        Fortieth--14 3/4%                          2010          50,000,000                   0
41.        Forty-first--15 5/8%                       1991          75,000,000                   0
42.        Forty-second--18%                    10/15/1991         100,000,000                   0
43.        Forty-third--Adjustable Rate          11/1/2002          50,000,000          13,234,000
44.        Forty-fourth--12 5/8%                      2013         100,000,000                   0
45.        Forty-fifth--8 5/8%                    3/1/1996          80,000,000                   0
46.        Forty-sixth--8 1/2%                    7/1/1996          75,000,000                   0
47.        Forty-seventh--9 3/8%                      1997          50,000,000          50,000,000;


and

    WHEREAS,  the Original Mortgagor entered into a Reorganization Agreement and
Plan of Merger dated August 12, 1987, as amended, pursuant to which, among other
things, the Original  Mortgagor was  merged into the  Company as  of January  9,
1989,  upon such terms as fully to preserve and in no respect to impair the Lien
or security of the Mortgage  or any of the rights  or powers of the trustees  or
the bondholders thereunder; and

    WHEREAS,  pursuant to  Article XVI  of the  Mortgage, the  Company executed,
delivered, recorded and filed its Forty-third Supplemental Indenture dated as of
January 9,  1989,  whereby the  Company  assumed and  agreed  to pay,  duly  and
punctually,  the  principal  of  and  interest on  the  bonds  issued  under the
Mortgage, in accordance with  the provisions of said  bonds and coupons and  the
Mortgage,  and agreed to perform and fulfill all the covenants and conditions of
the Mortgage to  be kept  or performed by  the Original  Mortgagor, and  whereby
Bankers  Trust Company was  appointed Corporate Trustee  in succession to Morgan
Guaranty Trust Company of New York,  resigned, under the Mortgage, and James  F.
Conlan  was appointed Co-Trustee in succession  to R.E. Sparrow, resigned, under
the Mortgage; and

                                       5

    WHEREAS, the  Company executed,  delivered,  recorded and  filed  additional
Supplemental Indentures to the Mortgage as follows:



                             DATED AS OF
                      -------------------------
                   
Forty-fourth          March 31, 1989
Forty-fifth           December 29, 1989
Forty-sixth           March 31, 1991;


and

    WHEREAS,   pursuant  to  said  Forty-sixth  Supplemental  Indenture,  Morgan
Guaranty Trust Company of New York was appointed Corporate Trustee in succession
to Bankers  Trust Company,  resigned, under  the Mortgage  and James  F.  Conlan
resigned as Co-Trustee under the Mortgage and all the right, title and powers of
the  Co-Trustee devolved  upon the  Corporate Trustee  and its  successors alone
until such time as a successor to the Co-Trustee shall be appointed; and

    WHEREAS, the  Company executed,  delivered,  recorded and  filed  additional
Supplemental Indentures to the Mortgage as follows:



                             DATED AS OF
                      -------------------------
                   
Forty-seventh         December 31, 1991
Forty-eighth          March 15, 1992
Forty-ninth           July 31, 1992
Fiftieth              March 15, 1993
Fifty-first           November 1, 1993;
Fifty-second          June 1, 1994;


and

                                       6

    WHEREAS,   the  Company  has  heretofore  issued,  in  accordance  with  the
provisions of the Mortgage, bonds entitled and designated First Mortgage  Bonds,
of the Series and in the principal amounts as follows:



                                                                    AGGREGATE          AGGREGATE
                                                                PRINCIPAL AMOUNT   PRINCIPAL AMOUNT
           SERIES                                  DUE DATE          ISSUED           OUTSTANDING
           ------------------------------------  -------------  -----------------  -----------------
                                                                       
48.        Forty-eighth--Medium-Term Notes,            various  $     125,000,000  $     120,000,000
           Series A
49.        Forty-ninth--Medium-Term Notes,             various        100,000,000         87,500,000
           Series B
50.        Fiftieth--Medium-Term Notes, Series         various        150,000,000        144,714,391
           C
51.        Fifty-first--Medium-Term Notes,             various        125,000,000        125,000,000
           Series D
52.        Fifty-second--C-U                           various        125,216,000        118,235,500
53.        Fifty-third--Medium-Term Notes,             various        250,000,000        250,000,000
           Series E
54.        Fifty-fourth--6 3/4%                       4/1/2005         75,000,000         75,000,000
55.        Fifty-fifth--Medium-Term Notes,             various        250,000,000        250,000,000
           Series F
56.        Fifty-sixth--E-L                            various         35,600,000         35,600,000
57.        Fifty-seventh Medium-Term Notes,            various        250,000,000        250,000,000;
           Series G


and

    WHEREAS,  in addition to the property described in the Mortgage, the Company
has acquired certain other property, rights and interests in property; and

    WHEREAS, Section 8 of the Mortgage provides that the form of each series  of
bonds  (other than the First Series) issued  thereunder and of the coupons to be
attached to the coupon  bonds, if any,  of such series  shall be established  by
Resolution  of the  Board of  Directors of  the Company;  that the  form of such
series, as established by said Board of Directors, shall specify the descriptive
title of the bonds  and various other  terms thereof; and  that such series  may
also  contain  such  provisions  not inconsistent  with  the  provisions  of the
Mortgage, as supplemented, as the Board of

                                       7

Directors may, in  its discretion, cause  to be inserted  therein expressing  or
referring  to the terms  and conditions upon  which such bonds  are to be issued
and/or secured under the Mortgage; and

    WHEREAS, Section 120 of the Mortgage provides, among other things, that  any
power,  privilege or  right expressly  or impliedly  reserved to  or in  any way
conferred upon the Company by any provision of the Mortgage, whether such power,
privilege or right  is in any  way restricted  or is unrestricted,  may (to  the
extent  permitted  by law)  be  in whole  or in  part  waived or  surrendered or
subjected to  any restriction  if  at the  time  unrestricted or  to  additional
restriction  if already restricted,  and the Company may  enter into any further
covenants, limitations or restrictions for the benefit of any one or more series
of bonds issued thereunder and provide that a breach thereof shall be equivalent
to a default under the Mortgage, or the Company may cure any ambiguity contained
therein, or in any supplemental indenture,  or may (in lieu of establishment  by
Resolution  as provided in  Section 8 of  the Mortgage) establish  the terms and
provisions of any series of bonds other than the First Series, by an  instrument
in  writing executed and acknowledged by the  Company in such manner as would be
necessary to entitle a conveyance of real estate to record in all of the  states
in  which any property at the time subject  to the Lien of the Mortgage shall be
situated; and the Trustee is further authorized by said Section 120 to join with
the Company  in  the execution  of  such  instrument or  instruments,  and  such
instrument,  executed and acknowledged  as aforesaid, shall  be delivered to the
Trustee, and  thereupon  any modification  of  the provisions  of  the  Mortgage
therein  set forth, authorized  by said Section  120, shall be  binding upon the
parties to the Mortgage,  their successors and assigns,  and the holders of  the
bonds and coupons thereby secured; provided, however, anything therein contained
to  the contrary not  withstanding, said Section  120 shall not  be construed to
permit any act, waiver, surrender  or restriction adversely affecting any  bonds
then Outstanding under the Mortgage; and

    WHEREAS,  in Section  42 of the  Mortgage the  Original Mortgagor covenanted
that it would execute and deliver such supplemental indenture or indentures  and
such further instruments and do such further acts

                                       8

as  might be necessary or  proper to carry out  more effectually the purposes of
the Mortgage  and to  make subject  to the  Lien of  the Mortgage  any  property
thereafter  acquired, made or constructed and intended to be subject to the Lien
thereof, and  to  transfer to  any  new trustee  or  trustees or  co-trustee  or
co-trustees, the estates, powers, instruments or funds held in trust thereunder;
and

    WHEREAS,  the  Company now  desires  to create  a  new series  of  bonds and
(pursuant to  the provisions  of Section  120 of  the Mortgage)  to add  to  its
covenants  and agreements contained in the Mortgage, as heretofore supplemented,
certain other covenants and agreements to be observed by it; and

    WHEREAS, the  execution and  delivery  by the  Company of  this  Fifty-third
Supplemental Indenture has been duly authorized by the Board of Directors of the
Company by appropriate Resolutions;

    NOW, THEREFORE, THIS INDENTURE WITNESSETH:

                                   ARTICLE I

                                GRANTING CLAUSES

    The  Company, in consideration of the premises  and of One Dollar ($1) to it
duly paid  by the  Trustee at  or before  the ensealing  and delivery  of  these
presents,  the receipt whereof is hereby  acknowledged, and in further assurance
of the estate, title and rights of  the Trustee under the Mortgage and in  order
further to secure the payment of both the principal of and interest and premium,
if  any, on the bonds from time to  time issued under the Mortgage, according to
their tenor  and  effect, and  the  performance of  all  the provisions  of  the
Mortgage  (including any  instruments supplemental thereto  and any modification
made as in the Mortgage provided) and of such bonds, and to confirm the Lien  of
the Mortgage on certain after-acquired property, hereby grants, bargains, sells,
releases,  conveys,  assigns,  transfers,  mortgages,  pledges,  sets  over  and
confirms (subject, however, to Excepted Encumbrances as defined in Section 6  of
the  Mortgage) unto  Chemical Bank  as Trustee  under the  Mortgage, and  to its
successor or successors in  said trust, and to  said Trustee and its  successors
and assigns forever, all property, real, personal

                                       9

and  mixed, owned by the  Original Mortgagor as of the  date of the Mortgage and
acquired by  the  Original  Mortgagor or  the  Company  after the  date  of  the
Mortgage,  subject to  the provisions  of subsection  (I) of  Section 87  of the
Mortgage and Section 2.02 of the Forty-third Supplemental Indenture thereto,  of
the  kind or nature specifically mentioned in  Article XXI of the Mortgage or of
any other  kind  or nature  (except  any herein  or  in the  Mortgage  expressly
excepted), now owned, or, subject to the provisions of subsection (I) of Section
87  of the Mortgage  and Section 2.02 of  the Forty-third Supplemental Indenture
thereto, hereafter acquired by the Company (by purchase, consolidation,  merger,
donation,  construction, erection or in any other way) and wheresoever situated,
including the properties described in Article VI hereof, and including  (without
in  anywise limiting or impairing  by the enumeration of  the same the scope and
intent of the foregoing) all lands,  power sites, flowage rights, water  rights,
water  locations, water  appropriations, ditches,  flumes, reservoirs, reservoir
sites, canals, raceways,  dams, dam sites,  aqueducts, and all  other rights  or
means  for appropriating, conveying, storing and  supplying water; all rights of
way and roads;  all plants  for the generation  of electricity  by steam,  water
and/or  other  power; all  power houses,  gas  plants, street  lighting systems,
standards and other equipment  incidental thereto, telephone, radio,  television
and  air  conditioning systems  and equipment  incidental thereto,  water works,
water systems, steam heat and hot water plants, substations, lines, service  and
supply  systems,  bridges, culverts,  tracks,  ice or  refrigeration  plants and
equipment, offices, buildings  and other structures  and the equipment  thereof;
all  machinery, engines,  boilers, dynamos,  electric, gas,  and other machines,
regulators,  meters,  transformers,  generators,  motors,  electrical,  gas  and
mechanical  appliances, conduits, cables, water, steam heat, gas or other pipes,
gas mains and pipes, service pipes,  fittings, valves and connections, pole  and
transmission  lines, wires, cables, tools,  implements, apparatus, furniture and
chattels; all franchises, consents  or permits; all  lines for the  transmission
and  distribution of electric current, gas, steam heat or water for any purpose,
including towers, poles, wires, cables, pipes, conduits, ducts and all apparatus
for use in connection therewith; all real estate, lands, easements,  servitudes,
licenses,  permits, franchises, privileges, rights of way and other rights in or
relating to public or

                                       10

private property,  real or  personal,  or the  occupancy  of such  property  and
(except  as herein or in  the Mortgage expressly excepted)  all right, title and
interest the Company may now have or may hereafter acquire in and to any and all
property of any kind or nature wheresoever situated;

    And the  Company does  hereby confirm  that the  Company will  not cause  or
consent  to a  partition, either  voluntarily or  through legal  proceedings, of
property subject  to  the Lien  of  the  Mortgage whether  herein  described  or
heretofore or hereafter acquired, in which its ownership shall be as a tenant in
common,  except as  permitted by  and in conformity  with the  provisions of the
Mortgage and particularly of Article XI thereof;

    TOGETHER  WITH   and  all   and  singular   the  tenements,   hereditaments,
prescriptions, servitudes and appurtenances belonging or in anywise appertaining
to  the  aforementioned property  or any  part thereof,  with the  reversion and
reversions, remainder and remainders and  (subject to the provisions of  Section
57  of  the  Mortgage) the  tolls,  rents, revenues,  issues,  earnings, income,
product 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
(subject to the provisions of subsection (I)  of Section 87 of the Mortgage  and
Section  2.02 of the  Forty-third Supplemental Indenture  thereto) may hereafter
acquire in and to the aforementioned property and franchises and every part  and
parcel thereof.

    IT  IS  HEREBY AGREED  by the  Company  that, subject  to the  provisions of
subsection (I) of Section 87 of the Mortgage and Section 2.02 of the Forty-third
Supplemental Indenture thereto, all the property, rights and franchises acquired
by the  Company (by  purchase,  consolidation, merger,  donation,  construction,
erection or in any other way) after the date hereof, except any herein or in the
Mortgage  expressly excepted,  shall be  and are  as fully  granted and conveyed
hereby and  by the  Mortgage,  and as  fully embraced  within  the Lien  of  the
Mortgage,  as if  such property,  rights and  franchises were  now owned  by the
Company and were specifically described herein  or in the Mortgage and  conveyed
hereby or thereby;

    Provided  that  the following  are not  and are  not intended  to be  now or
hereafter granted, bargained, sold,  released, conveyed, assigned,  transferred,
mortgaged,    pledged,    set   over    or    confirmed   hereunder    and   are

                                       11

hereby expressly excepted from the Lien and operation of the Mortgage, viz.: (1)
cash, shares of stock, bonds, notes  and other obligations and other  securities
not hereafter specifically pledged, paid, deposited, delivered or held under the
Mortgage  or  covenanted  so  to  be;  (2)  merchandise,  equipment,  apparatus,
materials or supplies held for the purpose  of sale or other disposition in  the
usual  course  of  business;  fuel,  oil  and  similar  materials  and  supplies
consumable in  the  operation of  any  of the  properties  of the  Company;  all
aircraft,  tractors,  rolling  stock,  trolley  coaches,  buses,  motor coaches,
automobiles, motor trucks, and  other vehicles and  materials and supplies  held
for  the purpose of repairing  or replacing (in whole or  part) any of the same;
(3) bills,  notes and  accounts  receivable, judgments,  demands and  choses  in
action,  and  all contracts,  leases and  operating agreements  not specifically
pledged under the  Mortgage or covenanted  so to be;  the Company's  contractual
rights  or other interest in or with respect  to tires not owned by the Company;
(4) the last day of the  term of any lease or  leasehold which may be or  become
subject to the Lien of the Mortgage; (5) electric energy, gas, steam, water, ice
and  other  materials  or products  generated,  manufactured,  stored, produced,
purchased or  acquired by  the Company  for  sale, distribution  or use  in  the
ordinary  course  of  its business;  all  timber, minerals,  mineral  rights and
royalties and all Natural Gas and Oil Production Property, as defined in Section
4 of  the  Mortgage;  and (6)  the  Company's  franchise to  be  a  corporation;
provided, however, that the property and rights expressly excepted from the Lien
and  operation of the Mortgage  in the above subdivisions  (2) and (3) shall (to
the extent permitted by law) cease to be so excepted in the event and as of  the
date  that  the Trustee  or  a receiver  or trustee  shall  enter upon  and take
possession of  the Mortgaged  and Pledged  Property in  the manner  provided  in
Article XIII of the Mortgage by reason of the occurrence of a Default as defined
in Section 65 thereof.

    TO  HAVE AND TO HOLD all such properties, real, personal and mixed, granted,
bargained, sold, released, conveyed, assigned, transferred, mortgaged,  pledged,
set  over or confirmed by  the Company as aforesaid, or  intended so to be, unto
Chemical Bank as Trustee, and its successors and assigns forever;

                                       12

    IN TRUST NEVERTHELESS, for the same purposes and upon the same terms, trusts
and conditions and subject to and with the same provisions and covenants as  are
set  forth  in  the  Mortgage,  this  Fifty-third  Supplemental  Indenture being
supplemental to the Mortgage;

    AND IT IS HEREBY COVENANTED by  the Company that all the terms,  conditions,
provisos,  covenants and provisions  contained in the  Mortgage shall affect and
apply to the property hereinbefore described  and conveyed, and to the  estates,
rights, obligations and duties of the Company and the Trustee under the Mortgage
and  the beneficiaries of  the trust with  respect to said  property, and to the
Trustee under the Mortgage and its successors  in the trust, in the same  manner
and  with the same effect as if the  said property had been owned by the Company
at the time of the execution of  the Mortgage, and had been specifically and  at
length  described in and conveyed  to said Trustee by the  Mortgage as a part of
the property therein stated to be conveyed.

                                   ARTICLE II

             REGARDING THE RESIGNATION OF THE RESIGNING TRUSTEE AND
                        APPOINTMENT OF SUCCESSOR TRUSTEE

    SECTION 2.01. Morgan Guaranty Trust Company of New York hereby gives written
notice to the  Company that  it hereby resigns  as Corporate  Trustee under  the
Mortgage, such resignation to take effect as of September 1, 1994.

    SECTION  2.02. Pursuant to Section 102 of  the Mortgage, and by order of its
Board of Directors,  the Company  hereby accepts the  foregoing resignation  and
appoints  Chemical  Bank  as  Successor Corporate  Trustee  under  the Mortgage,
effective as of  September 1,  1994. By  execution hereof  Chemical Bank  hereby
acknowledges  its  acceptance of  its appointment  by  the Company  as Successor
Corporate Trustee under the Mortgage.

    SECTION 2.03. The  Resigning Corporate Trustee  hereby conveys, assigns  and
transfers  to the Successor  Corporate Trustee, and  its successors and assigns,
upon the  trusts expressed  in the  Mortgage (as  amended hereby),  all  rights,
title, powers and trusts of the Resigning Corporate

                                       13

Trustee  under and pursuant to  the Mortgage and all  property and money held by
the Resigning  Corporate Trustee  under the  Mortgage. The  Resigning  Corporate
Trustee  and the Company agree, upon request of the Successor Corporate Trustee,
to execute, acknowledge and deliver  such further instruments of conveyance  and
further assurances and to do such other things as may reasonably be required for
more  fully and certainly  vesting in and confirming  to the Successor Corporate
Trustee such rights, title, powers and trusts.

                                  ARTICLE III

                          FIFTY-EIGHTH SERIES OF BONDS

    SECTION 3.01. There shall  be a series of  bonds designated "First  Mortgage
Bonds,  Series  1994-1"  (herein  sometimes  referred  to  as  the "Fifty-eighth
Series"), each of  which shall also  bear the descriptive  title First  Mortgage
Bond,  and the  form thereof,  which shall be  established by  Resolution of the
Board of  Directors  of the  Company,  shall contain  suitable  provisions  with
respect  to  the matters  hereinafter in  this Section  specified. Bonds  of the
Fifty-eighth Series shall mature on the maturity date, and in principal  amounts
corresponding  to the principal amounts, of  first mortgage and collateral trust
bonds designated "Series 1994-1," issued  under the Company's Mortgage and  Deed
of  Trust, dated as of January 9, 1989, as amended and supplemented, to Chemical
Bank, as trustee, on the basis of  such bonds of the Fifty-eighth Series.  Bonds
of  the Fifty-eighth  Series shall  be issued as  fully registered  bonds in the
denomination of One Thousand Dollars and, at  the option of the Company, in  any
multiple or multiples of One Thousand Dollars (the exercise of such option to be
evidenced  by the execution and delivery  thereof); they shall bear no interest;
and the principal of each such bond shall be payable at the office or agency  of
the  Company in the Borough of Manhattan, The  City of New York, in such coin or
currency of the  United States of  America as at  the time of  payment is  legal
tender  for public and private debts. Bonds  of the Fifty-eighth Series shall be
dated as in Section 10 of the Mortgage provided.

                                       14

  (I)   Bonds  of  the  Fifty-eighth  Series  shall  be  redeemable  either   at
the  option  of the  Company or  pursuant  to the  requirements of  the Mortgage
(including, among other things, the provisions of  Sections 39, 64 or 87 of  the
Mortgage or with the Proceeds of Released Property).

  (II)  At  the  option  of  the  registered  owner,  any  bonds  of  the Fifty-
eighth Series, upon surrender thereof for  cancellation at the office or  agency
of  the Company  in the  Borough of Manhattan,  The City  of New  York, shall be
exchangeable for a like aggregate principal  amount of bonds of the same  series
of other authorized denominations.

    Bonds  of  the Fifty-eighth  Series shall  be  transferable (subject  to the
provisions of Section 12  of the Mortgage  and to the  limitations set forth  in
this  Fifty-third  Supplemental  Indenture),  upon  the  surrender  thereof  for
cancellation, together with a written instrument of transfer in form approved by
the registrar duly executed  by the registered owner  or by his duly  authorized
attorney,  at the office or  agency of the Company  in the Borough of Manhattan,
The City of New York. Upon any transfer or exchange of bonds of the Fifty-eighth
Series, the Company may  make a charge therefor  sufficient to reimburse it  for
any  tax or taxes or other governmental charge, as provided in Section 12 of the
Mortgage, but the Company hereby waives any  right to make a charge in  addition
thereto for any exchange or transfer of bonds of the Fifty-eighth Series.

    The  Trustee may conclusively presume that  the obligation of the Company to
pay the principal  of the bonds  of the  Fifty-eighth Series as  the same  shall
become due and payable shall have been fully satisfied and discharged unless and
until  it  shall have  received  a written  notice  from the  trustee  under the
Company's Mortgage and Deed of  Trust, dated as of  January 9, 1989, as  amended
and  supplemented, to Chemical Bank, as trustee, signed by the President, a Vice
President, an  Assistant Vice  President or  a Trust  Officer of  such  trustee,
stating  that interest or  principal due and  payable on any  bonds issued under
said Mortgage and  Deed of  Trust has  not been  fully paid  and specifying  the
amount of funds required to make such payment.

    Bonds  of the Fifty-eighth Series  shall be initially issued  in the name of
Chemical  Bank,  as   trustee  under   the  Company's  Mortgage   and  Deed   of

                                       15

Trust,  dated as of January 9, 1989,  as amended and supplemented, and shall not
be transferable, except to any successor trustee under said Mortgage and Deed of
Trust.

    After the execution and delivery of this Fifty-third Supplemental  Indenture
and  upon  compliance  with  the  applicable  provisions  of  the  Mortgage,  as
supplemented, it  is  contemplated that  there  shall  be issued  bonds  of  the
Fifty-eighth  Series in an aggregate principal  amount not to exceed One Hundred
Twelve Million Five Hundred Thousand Dollars ($112,500,000).

                                   ARTICLE IV

               THE COMPANY RESERVES THE RIGHT TO AMEND PROVISIONS
              REGARDING PROPERTIES EXCEPTED FROM LIEN OF MORTGAGE

    SECTION 4.01. The Company reserves the  right, without any consent or  other
action  by holders of bonds  of the Fifty-fourth Series,  or any other series of
bonds subsequently  created  under the  Mortgage  (including the  bonds  of  the
Fifty-eighth  Series), to  make such amendments  to the  Mortgage, as heretofore
amended and supplemented,  as shall  be necessary in  order to  amend the  first
proviso  to the granting  clause of the  Mortgage, which proviso  sets forth the
properties excepted from the Lien  of the Mortgage, to  add a new exception  (7)
which shall read as follows:

    "(7)  allowances allocated to steam-electric  generating plants owned by the
    Company or in which the Company has  interests, pursuant to Title IV of  the
    Clean  Air Act Amendments of 1990, Pub. L. 101-549, Nov. 15, 1990, 104 Stat.
    2399, 42 USC 7651, ET SEQ., as now in effect or as hereafter supplemented or
    amended."

                                   ARTICLE V

                            MISCELLANEOUS PROVISIONS

    SECTION 5.01. The right,  if any, of  the Company to  assert the defense  of
usury  against a holder  or holders of  bonds of the  Fifty-eighth Series or any
subsequent series shall be determined  only under the laws  of the State of  New
York.

                                       16

    SECTION  5.02. The terms defined in the  Mortgage shall, for all purposes of
this Fifty-third  Supplemental Indenture,  have the  meanings specified  in  the
Mortgage.

    SECTION  5.03.  The Trustee  hereby accepts  the trusts  declared, provided,
created or supplemented in  the Mortgage and herein,  and agrees to perform  the
same  upon the terms  and conditions set  forth herein and  in the Mortgage, and
upon the following terms and conditions:

    The Trustee shall  not be  responsible in any  manner whatsoever  for or  in
respect  of  the  validity  or  sufficiency  of  this  Fifty-third  Supplemental
Indenture or for or in  respect of the recitals  contained herein, all of  which
recitals  are made by  the Company solely.  In general, each  and every term and
condition contained in Article XVII of the Mortgage shall apply to and form part
of this Fifty-third Supplemental Indenture with the same force and effect as  if
the  same were  herein set  forth in full,  with such  omissions, variations and
insertions, if  any, as  may be  appropriate to  make the  same conform  to  the
provisions of this Fifty-third Supplemental Indenture.

    SECTION 5.04. Whenever in this Fifty-third Supplemental Indenture either the
Company  or the  Trustee is  named or  referred to,  this shall,  subject to the
provisions of Articles XVI and  XVII of the Mortgage,  be deemed to include  the
successors  and assigns of such  party, and all the  covenants and agreements in
this Fifty-third  Supplemental  Indenture  contained  by or  on  behalf  of  the
Company, or by or on behalf of the Trustee, or either of them, shall, subject as
aforesaid,  bind  and  inure  to  the  respective  benefits  of  the  respective
successors and assigns of such parties, whether so expressed or not.

    SECTION 5.05. Nothing in this Fifty-third Supplemental Indenture,  expressed
or  implied, is intended, or shall be construed,  to confer upon, or to give to,
any person, firm or corporation, other  than the parties hereto and the  holders
of  the bonds and coupons  Outstanding under the Mortgage,  any right, remedy or
claim under  or by  reason of  this Fifty-third  Supplemental Indenture  or  any
covenant,  condition,  stipulation, promise  or  agreement hereof,  and  all the
covenants, conditions, stipulations, promises and agreements in this Fifty-third
Supplemental Indenture

                                       17

contained by or on  behalf of the  Company shall be for  the sole and  exclusive
benefit  of the  parties hereto,  and of  the holders  of the  bonds and coupons
Outstanding under the Mortgage.

    SECTION 5.06. This Fifty-third Supplemental  Indenture shall be executed  in
several  counterparts each of which shall be  an original and all of which shall
constitute but one and the same instrument.

                                   ARTICLE VI

                        SPECIFIC DESCRIPTION OF PROPERTY

    The following described  properties of  the Company,  owned as  of the  date
hereof, and used (or held for future development and use) in connection with the
Pacific  Power Division of the Company's  electric utility systems, or for other
purposes, as hereinafter indicated, respectively:

                              H--OFFICE BUILDINGS

    The following  office and  service center  of the  Company in  the State  of
Washington including the following described real property:

H-48--YAKIMA OFFICE AND SERVICE CENTER

    In YAKIMA County, State of WASHINGTON

        H-48 ITEM: That part of the East 1/2 of the Southeast 1/4 of Section 17,
        Township 13 North, Range 19 East, W.M., lying northerly of the Northerly
        right-of-way  line  of  the  Burlington  Northern,  Inc.  Railroad  (now
        W.C.R.C.) right-of-way  as conveyed  by deed  recorded in  Volume 83  of
        Deeds, page 552;

        EXCEPTING THEREFROM the following:

        1)  That portion  thereof conveyed to  Union Gap  Irrigation District by
        deed dated April 6, 1916, and recorded in Volume 165 of Deeds, page 285,
        under Auditor's File No. 90399, described as all of the Northeast 1/4 of
        the Southeast 1/4 of said Section 17 lying North of a line 25 feet South
        of and parallel with the centerline of the Union Gap Ditch;

                                       18

        2) That portion thereof lying Westerly of the following described  line:
        Commencing at a point on the South line of the tract of land conveyed to
        Union  Gap Irrigation District by deed  recorded in Volume 165 of Deeds,
        page 285, under Auditor's File No. 90399, which point is 23.8 feet South
        and 59 feet  North 89  DEG. 55'  East of  the Northwest  corner of  said
        subdivision;  thence North 89 DEG. 55' East along the South line of said
        Union Gap  Irrigation District  property  653.11 feet  to the  point  of
        beginning  of said described line; thence South  00 DEG. 05' East to the
        Northeasterly  right-of-way  line  of  said  Burlington  Northern,  Inc.
        Railroad right-of-way and the terminus of said described line;

        3)  That portion thereof lying Easterly of the following described line:
        Beginning at the point of intersection of the Northeasterly right-of-way
        line of said Burlington Northern,  Inc. Railroad right-of-way, with  the
        West  line of the East  30.00 feet of the  Southeast 1/4 of said Section
        17; thence North 00  DEG. 32' 30"  West parallel with  the East line  of
        said  Section 1146.28 feet  to the P.C.  of a curve  to the left; thence
        along the arc of  a curve to  the left having a  radius of 925.00  feet,
        through  a central angle  of 30 DEG.  00'; thence North  30 DEG. 32' 30"
        West to the North line of the  Southeast 1/4 of said Section 17 and  the
        terminus of said described line (Parcel No. 191317-41001/Levy Code 385).

                                       19

    IN  WITNESS WHEREOF, PACIFICORP has caused its corporate name to be hereunto
affixed, and  this  instrument to  be  signed and  sealed  by one  of  its  Vice
Presidents,  and its corporate seal to be attested to by its Secretary or one of
its Assistant Secretaries;  and MORGAN GUARANTY  TRUST COMPANY OF  NEW YORK  has
caused  its corporate  name to  be hereunto affixed,  and this  instrument to be
signed and sealed by  one of its  Vice Presidents or one  of its Assistant  Vice
Presidents,  and its corporate  seal to be  attested to by  one of its Assistant
Secretaries; and Chemical  Bank has  caused its  corporate name  to be  hereunto
affixed,  and  this  instrument to  be  signed and  sealed  by one  of  its Vice
Presidents or one of its Assistant Vice Presidents, and its corporate seal to be
attested to by  one of its  Senior Trust Officers,  all as of  the day and  year
first above written.

[SEAL]                               PACIFICORP

                                     By      RICHARD T. O'BRIEN
                                        -------------------------------
                                                Vice President
Attest:

        JOHN M. SCHWEITZER
----------------------------------
       Assistant Secretary

                                      MORGAN GUARANTY TRUST COMPANY OF NEW YORK
[SEAL]                                as Resigning Corporate Trustee


                                      By        PETER VITELLIO
                                         -------------------------------
                                                 Vice President
Attest:

     TAMARA FELICETTI
----------------------------------
   Assistant Secretary


                                       20

                                     CHEMICAL BANK
                                     as Successor Corporate Trustee


                                     By          F.J. GRIPPO
                                        -------------------------------
Attest:                                         Vice President

             M. KATZ
----------------------------------
        Senior Trust Officer


                                       21

STATE OF OREGON       )
COUNTY OF MULTNOMAH   )   ss.:

On  this 8th day  of September, 1994,  before me, SHERYL  LEE STRATTON, a Notary
Public in and for  the State of Oregon,  personally appeared RICHARD T.  O'BRIEN
and  JOHN M.  SCHWEITZER, known to  me to be  a Vice President  and an Assistant
Secretary, respectively, of  PACIFICORP, an Oregon  corporation, who being  duly
sworn, stated that the seal affixed to the foregoing instrument is the corporate
seal  of  said corporation  and  acknowledged this  instrument  to be  the free,
voluntary and in all respects duly and properly authorized act and deed of  said
corporation.

    IN  WITNESS WHEREOF, I have  hereunto set my hand  and official seal the day
and year first above written.

                                             SHERYL LEE STRATTON
                                     ----------------------------------
                                     My commission expires: May 25, 1996
[SEAL]                                  Residing at: Portland, Oregon

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

    On this 1st  day of September,  1994, before me,  JOHN MIECHOWSKI, a  Notary
Public  in and for the State of New York, personally appeared PETER VITELLIO and
TAMARA FELICETTI, known to  me to be a  Vice President and Assistant  Secretary,
respectively,  of  MORGAN  GUARANTY  TRUST  COMPANY  OF  NEW  YORK,  a  New York
corporation, who being duly sworn, stated that the seal affixed to the foregoing
instrument is  the corporate  seal  of said  corporation and  acknowledged  this
instrument  to be  the free,  voluntary and  in all  respects duly  and properly
authorized act and deed of said corporation.

    IN WITNESS WHEREOF, I have  hereunto set my hand  and official seal the  day
and year first above written.

                                              JOHN MIECHKOWSKI
                                     ----------------------------------
                                      Notary Public, State of New York
                                               No. 30-4893319
                                         Qualified in Nassau County
[SEAL]                                Commission expires: May 18, 1995


                                       22

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

    On  this 2nd day of September, 1994, before me, EMILY FAYAN, a Notary Public
in and for the State of New  York, personally appeared F.J. GRIPPO and M.  KATZ,
known  to me to be a Vice President and a Senior Trust Officer, respectively, of
CHEMICAL BANK, a  New York corporation,  who being duly  sworn, stated that  the
seal  affixed  to  the  foregoing  instrument  is  the  corporate  seal  of said
corporation and acknowledged this  instrument to be the  free, voluntary and  in
all respects duly and properly authorized act and deed of said corporation.

    IN  WITNESS WHEREOF, I have  hereunto set my hand  and official seal the day
and year first above written.

                                                 EMILY FAYAN
                                     ----------------------------------
                                      Notary Public, State of New York
                                               No. 24-4737006
                                          Qualified in Kings County
                                      Commission expires: December 31,
[SEAL]                                              1995