Exhibit 4









































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KANSAS GAS AND ELECTRIC COMPANY



TO



BNY MIDWEST TRUST COMPANY

(successor to Harris Trust and Savings Bank)



and



JUDITH L. BARTOLINI

(successor to W. A. Spooner, Henry A. Theis, Oliver R. Brooks,

Wesley L. Baker, Edwin F. McMichael and R. Amundsen)



as Trustees under Kansas Gas and Electric Companys

Mortgage and Deed of Trust, Dated as of April 1, 1940



FORTY- FOURTH SUPPLEMENTAL INDENTURE



Providing, among other things, for



First Mortgage Bonds, 4.6% Series Due 2010



Dated as of May 6, 2005



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FORTY-FOURTH SUPPLEMENTAL INDENTURE



INDENTURE, dated as of May 6, 2005, between KANSAS GAS AND ELECTRIC COMPANY, a corporation of the State of Kansas (formerly
named KCA Corporation and successor by merger to Kansas Gas and Electric Company, a corporation of the State of Kansas, hereinafter sometimes called the Company-Kansas), whose post office address is 120 East First Street, Wichita, Kansas
67202 (hereinafter sometimes called the Company), and BNY Midwest Trust Company, a corporation of the State of Illinois, whose post office address is 2 North LaSalle Street, Suite 1020, Chicago, Illinois 60602 (successor to Harris Trust
and Savings Bank (the Corporate Trustee)), and JUDITH L. BARTOLINI (successor to W.A. Spooner, Henry A. Theis, Oliver R. Brooks, Wesley L. Baker, Edwin F. McMichael and R. Amundsen, and being hereinafter sometimes called the
Individual Trustee), whose post office address is 2 North LaSalle Street, Suite 1020, Chicago, Illinois 60602 (the Corporate Trustee and the Individual Trustee being hereinafter together sometimes called the Trustees), as
Trustees under the Mortgage and Deed of Trust, dated as of April 1, 1940 (hereinafter called the Mortgage), which Mortgage was executed and delivered by Kansas Gas and Electric Company, a corporation of the State of West Virginia to
which the Company-Kansas was successor by merger (hereinafter sometimes called the Company-West Virginia), to secure the payment of bonds issued or to be issued under and in accordance with the provisions of the Mortgage, reference to
which Mortgage is hereby made, this Indenture (hereinafter sometimes called the Forty-fourth Supplemental Indenture) being supplemental thereto;



WHEREAS, the Company-West Virginia caused the Mortgage to be filed for record as a mortgage of real property and as a chattel mortgage in the offices of
the Registers of Deeds in various counties in the State of Kansas, and on April 25, 1940 paid to the Register of Deeds of Sedgwick County, Kansas, that being the County in which the Mortgage was first filed for record, the sum of $40,000 in payment
of the Kansas mortgage registration tax as provided by Section 79-3101 et seq.,General Statutes of Kansas 1935; and



WHEREAS, by the Mortgage, the Company-West Virginia covenanted that it would execute and deliver such supplemental indenture or indentures and such
further instruments and do such further acts 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, intended to be subject to the
lien thereof; and



WHEREAS, an instrument, dated May 31, 1949,
was executed by the Company-West Virginia appointing Oliver R. Brooks as Individual Trustee in succession to said Henry A. Theis, resigned, under the Mortgage, and by Oliver R. Brooks accepting the appointment as Individual Trustee under the
Mortgage in succession to said Henry A. Theis, which instrument was filed for record in the offices of the Registers of Deeds in various counties in the State of Kansas; and



WHEREAS, an instrument, dated March 3, 1958, was executed by the Company-West Virginia appointing Wesley L. Baker as
Individual Trustee in succession to said Oliver R. Brooks, resigned, under the Mortgage, and by Wesley L. Baker accepting the appointment as Individual Trustee under the Mortgage in succession to said Oliver R. Brooks, which instrument was filed for
record in the offices of the Registers of Deeds in various counties in the State of Kansas; and



---

WHEREAS, an instrument, dated November 20, 1969, was executed by the Company-West Virginia appointing
Edwin F. McMichael as Individual Trustee in succession to said Wesley L. Baker, resigned, under the Mortgage, and by Edwin F. McMichael accepting the appointment as Individual Trustee under the Mortgage in succession to said Wesley L. Baker, which
instrument was filed for record in the offices of the Registers of Deeds in various counties in the State of Kansas; and



WHEREAS, by the Twenty-seventh Supplemental Indenture mentioned below, the Company-Kansas, among other things, appointed R. Amundsen as Individual Trustee
in succession to said Edwin F. McMichael, resigned, under the Mortgage, and by R. Amundsen accepting the appointment as Individual Trustee under the Mortgage in succession to said Edwin F. McMichael; and



WHEREAS, by the Thirty-second Supplemental Indenture mentioned below, the
Company-Kansas, among other things, appointed W. A. Spooner as Individual Trustee in succession to said R. Amundsen, resigned, under the Mortgage, and by W. A. Spooner accepting the appointment as Individual Trustee under the Mortgage in succession
to said R. Amundsen; and



WHEREAS, by the Fortieth Supplemental
Indenture mentioned below, the Company-Kansas, among other things, appointed Judith L. Bartolini as Individual Trustee in succession to said W.A. Spooner resigned, under the Mortgage, and by Judith L. Bartolini accepting the appointment as
Individual Trustee under the Mortgage in succession to said W.A. Spooner; and



WHEREAS, the Company-West Virginia executed and delivered to the Trustees a First Supplemental Indenture, dated as of June 1, 1942 (which supplemental indenture is hereinafter sometimes called the First
Supplemental Indenture); and



WHEREAS, the Company-West
Virginia caused the First Supplemental Indenture to be filed for record as a mortgage of real property and as a chattel mortgage in the offices of the Registers of Deeds in various counties in the State of Kansas, but paid no mortgage registration
tax in connection with the recordation of the First Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-West Virginia executed and delivered to the Trustees the following supplemental indentures:



|                               |  |                 
|------------------------------ |  | ----------------
|Designation                    |  | Dated as of     
|Second Supplemental Indenture  |  | March 1, 1948   
|Third Supplemental Indenture   |  | December 1, 1949
|Fourth Supplemental Indenture  |  | June 1, 1952    
|Fifth Supplemental Indenture   |  | October 1, 1953 
|Sixth Supplemental Indenture   |  | March 1, 1955   
|Seventh Supplemental Indenture |  | February 1, 1956
|Eighth Supplemental Indenture  |  | January 1, 1961 



-3-



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|                                |  |              
|------------------------------- |  | -------------
|Ninth Supplemental Indenture    |  | May 1, 1966  
|Tenth Supplemental Indenture    |  | March 1, 1970
|Eleventh Supplemental Indenture |  | May 1, 1971  
|Twelfth Supplemental Indenture  |  | March 1, 1972



which supplemental indentures are
hereinafter sometimes called the Second through Twelfth Supplemental Indentures, respectively; and



WHEREAS, the Company-West Virginia caused the Second through Eighth Supplemental Indentures to be filed for record as a mortgage of real property and as a
chattel mortgage in the offices of the Registers of Deeds in various counties in the State of Kansas, and caused the Ninth through Twelfth Supplemental Indentures to be filed for record as a mortgage of real property in the offices of the Registers
of Deeds in various counties in the State of Kansas and as a chattel mortgage in the Office of the Secretary of State of Kansas, and on the following dates paid to the Register of Deeds of Sedgwick County, Kansas, that being the County in which the
Second through Twelfth Supplemental Indentures were first filed for record as a mortgage of real property, the following amounts:



|                 |  |        |       
|---------------- |  | ------ | ------
|Date             |  | Amount
|March 30, 1948   |  | $      | 12,500
|December 7, 1949 |  |        | 7,500 
|June 17, 1952    |  |        | 30,000
|October 21, 1953 |  |        | 25,000
|March 22, 1955   |  |        | 25,000
|March 5, 1956    |  |        | 17,500
|January 24, 1961 |  |        | 17,500
|May 17, 1966     |  |        | 40,000
|March 10, 1970   |  |        | 87,500
|May 19, 1971     |  |        | 87,500
|March 23, 1972   |  |        | 62,500



such amounts being in payment of the
Kansas mortgage registration tax as provided by the then currently applicable sections of the statutes of the State of Kansas in effect on those dates; and



WHEREAS, the Company-West Virginia was merged into the Company-Kansas on May 31, 1973; and



WHEREAS, in order to evidence the succession of the Company-Kansas to the Company-West Virginia and the assumption by the
Company-Kansas of the covenants and conditions of the Company-West Virginia in the bonds and in the Mortgage contained, and to enable the Company-Kansas to have and exercise the powers and rights of the Company-West Virginia under the Mortgage in
accordance with the terms thereof, the Company-Kansas executed and delivered to the Trustees a Thirteenth Supplemental Indenture, dated as of May 31, 1973 (which supplemental indenture is hereinafter sometimes called the Thirteenth
Supplemental Indenture); and



-4-



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WHEREAS, the Company-Kansas caused the Thirteenth Supplemental Indenture to be filed for record as a
mortgage of real property in the offices of the Registers of Deeds in various counties in the State of Kansas and as a chattel mortgage in the Office of the Secretary of State of Kansas, but paid no mortgage registration tax in connection with the
recordation of the Thirteenth Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-Kansas executed and delivered to the Trustees the following supplemental indentures:



|                                      |  |                  
|------------------------------------- |  | -----------------
|Designation                           |  | Dated as of      
|Fourteenth Supplemental Indenture     |  | July 1, 1975     
|Fifteenth Supplemental Indenture      |  | December 1, 1975 
|Sixteenth Supplemental Indenture      |  | September 1, 1976
|Seventeenth Supplemental Indenture    |  | March 1, 1977    
|Eighteenth Supplemental Indenture     |  | May 1, 1977      
|Nineteenth Supplemental Indenture     |  | August 1, 1977   
|Twentieth Supplemental Indenture      |  | March 15, 1978   
|Twenty-first Supplemental Indenture   |  | January 1, 1979  
|Twenty-second Supplemental Indenture  |  | April 1, 1980    
|Twenty-third Supplemental Indenture   |  | July 1, 1980     
|Twenty-fourth Supplemental Indenture  |  | August 1, 1980   
|Twenty-fifth Supplemental Indenture   |  | June 1, 1981     
|Twenty-sixth Supplemental Indenture   |  | December 1, 1981 
|Twenty-seventh Supplemental Indenture |  | May 1, 1982      
|Twenty-eighth Supplemental Indenture  |  | March 15, 1984   
|Twenty-ninth Supplemental Indenture   |  | September 1, 1984
|Thirtieth Supplemental Indenture      |  | September 1, 1984
|Thirty-first Supplemental Indenture   |  | February 1, 1985 
|Thirty-second Supplemental Indenture  |  | April 15, 1986   
|Thirty-third Supplemental Indenture   |  | June 1, 1991     
|Thirty-fourth Supplemental Indenture  |  | March 31, 1992   
|Thirty-fifth Supplemental Indenture   |  | December 17, 1992
|Thirty-sixth Supplemental Indenture   |  | August 12, 1993  
|Thirty-seventh Supplemental Indenture |  | January 15, 1994 
|Thirty-eighth Supplemental Indenture  |  | March 1, 1994    
|Thirty-ninth Supplemental Indenture   |  | April 15, 1994   
|Fortieth Supplemental Indenture       |  | June 28, 2000    
|Forty-first Supplemental Indenture    |  | June 6, 2002     
|Forty-second Supplemental Indenture   |  | March 12, 2004   
|Forty-third Supplemental Indenture    |  | June 1, 2004     



which supplemental indentures are
hereinafter sometimes called the Fourteenth through Forty-third Supplemental Indentures, respectively; and



-5-



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WHEREAS, the Company-Kansas caused the Fourteenth Supplemental Indenture to be filed for record as a
mortgage of real property in the offices of the Registers of Deeds in various counties in the State of Kansas and as a chattel mortgage in the Office of the Secretary of State of Kansas; and



WHEREAS, the Company-Kansas caused the Fifteenth Supplemental Indenture to be
filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on December 10, 1975, Film 169, page 363), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on
December 10, 1975 and indexed as No. 325,911); and



WHEREAS,
the Company-Kansas caused the Sixteenth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on September 29, 1976, Film 21 1, page 363), and as a
chattel mortgage in the Office of the Secretary of State of Kansas (filed on September 29, 1976 and indexed as No. 363,835); and



WHEREAS, the Company-Kansas caused the Seventeenth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the
Register of Deeds of Sedgwick County, Kansas (filed on March 16, 1977, Film 234, page 492), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on March 1, 1977 and indexed as No. 384,759); and



WHEREAS, the Company-Kansas caused the Eighteenth Supplemental Indenture to
be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on May 26, 1977, Film 246, page 655), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on
May 26, 1977 and indexed as No. 394,573); and



WHEREAS, the
Company-Kansas caused the Nineteenth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on August 31, 1977, Film 263, page 882), and as a chattel
mortgage in the Office of the Secretary of State of Kansas (filed on September 1, 1977 and indexed as No. 406,577); and



WHEREAS, the Company-Kansas caused the Twentieth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the
Register of Deeds of Sedgwick County, Kansas (filed on March 29, 1978, Film 297, pages 635-656), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on March 30, 1978 and indexed as No. 434,072); and



WHEREAS, the Company-Kansas caused the Twenty-first Supplemental Indenture to
be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on January 9, 1979, Film 345, page 648), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed
on January 10, 1979 and indexed as No. 470,851); and



WHEREAS,
the Company-Kansas caused the Twenty-second Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on April 2, 1980, Film 413, page 1,468), and as a
chattel mortgage in the Office of the Secretary of State of Kansas (filed on April 3, 1980 and indexed as No. 533,415); and



WHEREAS, the Company-Kansas caused the Twenty-third Supplemental Indenture to be filed for record as a mortgage of real property in the office of the
Register of Deeds of Sedgwick County, Kansas (filed on July 1, 1980, Film 425, page 1,003), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on July 2, 1980 and indexed as No. 546,185); and



-6-



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WHEREAS, the Company-Kansas caused the Twenty-fourth Supplemental Indenture to be filed for record as a
mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on August 28, 1980, Film 435, page 266), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on August 29, 1980 and
indexed as No. 554,543); and



WHEREAS, the Company-Kansas
caused the Twenty-fifth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on June 30, 1981, Film 483, page 1,512), and as a chattel mortgage in the
Office of the Secretary of State of Kansas (filed on June 30, 1981 and indexed as No. 601,270); and



WHEREAS, the Company-Kansas caused the Twenty-sixth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the
Register of Deeds of Sedgwick County, Kansas (filed on December 30, 1981, Film 510, page 300), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on December 31, 1981 and indexed as No. 628,293); and



WHEREAS, the Company-Kansas caused the Twenty-seventh Supplemental Indenture
to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on May 6, 1982, Film 526, page 1,141), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed
on May 7, 1982 and indexed as No. 650,115); and



WHEREAS, the
Company-Kansas caused the Twenty-eighth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on March 22, 1984, Film 645, page 1,524), and as a chattel
mortgage in the Office of the Secretary of State of Kansas (filed on March 23, 1984 and indexed as No. 796,449); and



WHEREAS, the Company-Kansas caused the Twenty-ninth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the
Register of Deeds of Sedgwick County, Kansas (filed on September 5, 1984, Film 681, page 763), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on September 6, 1984 and indexed as No. 852,425); and



WHEREAS, the Company-Kansas caused the Thirtieth Supplemental Indenture to be
filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on September 12, 1984, Film 682, page 1,087), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed
on September 13, 1984 and indexed as No. 854,284); and



WHEREAS, the Company-Kansas caused the Thirty-third Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on June 18, 1991, Film 1 177, page
0876), and as a security agreement in the Office of Secretary of State of Kansas (filed on June 18, 1991 and indexed as No. 1,693,446); and



-7-



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WHEREAS, the Company-Kansas caused the Fortieth Supplemental Indenture to be filed for record as a
mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on June 28, 2000, Film 2062, page 0053), and as a security agreement in the Office of Secretary of State of Kansas (filed on June 28, 2000, and
indexed as No. 3756913); and



WHEREAS, the Company on the
following dates paid to the Register of Deeds of Sedgwick County, Kansas, that being the County in which the Fourteenth through Thirtieth Supplemental Indentures, the Thirty-third Supplemental Indenture and the Fortieth Supplemental Indenture were
first filed for record as a mortgage of real property, the following amounts:



|                   |  |        |             
|------------------ |  | ------ | ------------
|Date               |  | Amount
|July 2, 1975       |  | $      | 100,000     
|December 10, 1975  |  |        | 48,750      
|September 29, 1976 |  |        | 62,500      
|March 16, 1977     |  |        | 62,500      
|May 26, 1977       |  |        | 25,000      
|August 31, 1977    |  |        | 6,100       
|March 29, 1978     |  |        | 62,500      
|January 9, 1979    |  |        | 36,250      
|April 2, 1980      |  |        | 67,500      
|July 1, 1980       |  |        | 37,500      
|August 28, 1980    |  |        | 63,750      
|June 30, 1981      |  |        | 75,000      
|December 30, 1981  |  |        | 62,500      
|May 6, 1982        |  |        | 100,000     
|March 22, 1984     |  |        | 93,750      
|September 5, 1984  |  |        | 75,000      
|September 12, 1984 |  |        | 50,000      
|June 18, 1991      |  |        | 334,100     
|June 28, 2000      |  |        | 1,780,538.50



such amounts being in payment of the
Kansas mortgage registration tax as provided by the then currently applicable sections of the statutes of the State of Kansas in effect on those dates; and



WHEREAS, the Company-Kansas caused the Thirty-first Supplemental Indenture to be filed for record as a mortgage of real property in the office of the
Register of Deeds of Sedgwick County, Kansas (filed on February 1, 1985, Film 707, page 378), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on February 4, 1985 and indexed as No. 895,468), but paid no mortgage
registration tax in connection with the recordation of the Thirty-first Supplemental Indenture, no such tax having been payable in connection with such recordation; and



-8-



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WHEREAS, the Company-Kansas caused the Thirty-second Supplemental Indenture to be filed for record as a
mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on April 16, 1986, Film 791, page 1,336), and as a chattel mortgage in the Office of the Secretary of State of Kansas (filed on April 17, 1986 and
indexed as No. 1,048,212), but paid no mortgage registration tax in connection with the recordation of the Thirty-second Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, in order to evidence the succession of the Company to the
Company-Kansas and the assumption by the Company of the covenants and conditions of the Company-Kansas in the bonds and in the Mortgage contained, and to enable the Company to have and exercise the powers and rights of the Company-Kansas under the
Mortgage in accordance with the terms thereof, the Company executed and delivered to the Trustees a Thirty-fourth Supplemental Indenture, dated as of March 31, 1992 (which supplemental indenture is hereinafter sometimes called the
Thirty-fourth Supplemental Indenture); and



WHEREAS, the Company-Kansas caused the Thirty-fourth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on March 31, 1992, Film 1236, page
987), and as a security agreement in the Office of Secretary of State of Kansas (filed on March 31, 1992 and indexed as No. 1,780,893), but paid no mortgage registration tax in connection with the recordation of the Thirty-fourth Supplemental
Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company caused the Thirty-fifth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on December 16, 1992,
Film 301, page 0104), and as a security agreement in the Office of Secretary of State of Kansas (filed on December 16, 1992 and indexed as No. 1,861,886), but paid no mortgage registration tax in connection with the recordation of the Thirty-fifth
Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-Kansas caused the Thirty-sixth Supplemental Indenture to be filed for record as a mortgage of real property in the office of the
Register of Deeds of Sedgwick County, Kansas (filed on August 10, 1993, Film 1364, page 0515), and as a security agreement in the Office of Secretary of State of Kansas (filed on August 11, 1993 and indexed as No. 1,936,501), but paid no mortgage
registration tax in connection with the recordation of the Thirty-sixth Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-Kansas caused the Thirty-seventh Supplemental Indenture to be filed for record as a mortgage of real
property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on January 18, 1994, Film 1411, page 0710), and as a security agreement in the Office of Secretary of State of Kansas (filed on January 18, 1994 and indexed as No.
1,985,104), but paid no mortgage registration tax in connection with the recordation of the Thirty-seventh Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-Kansas caused the Thirty-eighth Supplemental Indenture
to be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on February 28, 1994, Film 1422, page 1046), and as a security agreement in the Office of Secretary of State of Kansas
(filed on February 28, 1994 and indexed as No. 1,997,743), but paid no mortgage registration tax in connection with the recordation of the Thirty-eighth Supplemental Indenture, no such tax having been payable in connection with such recordation; and



-9-



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WHEREAS, the Company-Kansas caused the Thirty-ninth Supplemental Indenture to be filed for record as a
mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on April 27, 1994, Film 1440, page 855), and as a security agreement in the Office of Secretary of State of Kansas (filed on April 27, 1994 and
indexed as No. 1,377,915), but paid no mortgage registration tax in connection with the recordation of the Thirty-ninth Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-Kansas caused the Forty-first Supplemental Indenture to
be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on June 6, 2002, Film 2460, page 1), and as a security agreement in the office of Secretary of State of Kansas (filed on June
6, 2002, and indexed as No. 5264221), but paid no mortgage registration tax in connection with the recordation of the Forty-first Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-Kansas caused the Forty-second Supplemental Indenture to
be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on March 12, 2004, Film 2854, page 8731), and as a security agreement in the office of Secretary of State of Kansas (filed on
March 12, 2004, and indexed as No. 5760673), but paid no mortgage registration tax in connection with the recordation of the Forty-second Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-Kansas caused the Forty-third Supplemental Indenture to
be filed for record as a mortgage of real property in the office of the Register of Deeds of Sedgwick County, Kansas (filed on June 10, 2004, Film and Page 28578510), and as a security agreement in the office of Secretary of State of Kansas (filed
on June 10, 2004, and indexed as No. 5820311), but paid no mortgage registration tax in connection with the recordation of the Forty-third Supplemental Indenture, no such tax having been payable in connection with such recordation; and



WHEREAS, the Company-West Virginia, the Company-Kansas or the Company has
from time to time caused to be filed in the respective offices of the above-mentioned Registers of Deeds and Secretary of State affidavits executed by the Trustees under the Mortgage, preserving and continuing the lien thereof either as a chattel
mortgage in accordance with the provisions of K.S.A. 58-303 (Section 58-303 of the General Statutes of Kansas 1935) or as a security agreement under the provisions of K.S.A. 84-9-401 et seq.;and



WHEREAS, in addition to the aforesaid filings for record in the respective
offices of the above-mentioned Registers of Deeds, the Company-West Virginia, the Company-Kansas or the Company has filed copies of the Mortgage and the First through Forty-third Supplemental Indentures, certified as true by it, with the Secretary
of State of Kansas; and



-10-



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WHEREAS, the Company-West Virginia, the Company-Kansas or the Company has heretofore issued, in
accordance with the provisions of the Mortgage, as heretofore supplemented, the following series of First Mortgage Bonds:



|                             |  |                        |             |                              |            
|---------------------------- |  | ---------------------- | ----------- | ---------------------------- | -----------
|Series                       |  | PrincipalAmount Issued |             | Principal Amount Outstanding
|3-3/8% Series due 1970       |  | $                      | 16,000,000  |                              | None       
|3-1/8% Series due 1978       |  |                        | 5,000,000   |                              | None       
|2-3/4% Series due 1979       |  |                        | 3,000,000   |                              | None       
|3-3/8% Series due 1982       |  |                        | 12,000,000  |                              | None       
|3-5/8% Series due 1983       |  |                        | 10,000,000  |                              | None       
|3-3/8% Series due 1985       |  |                        | 10,000,000  |                              | None       
|3-3/8% Series due 1986       |  |                        | 7,000,000   |                              | None       
|4-5/8% Series due 1991       |  |                        | 7,000,000   |                              | None       
|5-5/8% Series due 1996       |  |                        | 16,000,000  |                              | None       
|8-1/2% Series due 2000       |  |                        | 35,000,000  |                              | None       
|8-1/8% Series due 2001       |  |                        | 35,000,000  |                              | None       
|7-3/8% Series due 2002       |  |                        | 25,000,000  |                              | None       
|9-5/8% Series due 2005       |  |                        | 40,000,000  |                              | None       
|6% Series due 1985           |  |                        | 7,000,000   |                              | None       
|7-3/4% Series due 2005       |  |                        | 12,500,000  |                              | None       
|8-3/8% Series due 2006       |  |                        | 25,000,000  |                              | None       
|8-1/2% Series due 2007       |  |                        | 25,000,000  |                              | None       
|6% Series due 2007           |  |                        | 10,000,000  |                              | None       
|5-7/8% Series due 2007       |  |                        | 21,940,000  |                              | None       
|8-7/8% Series due 2008       |  |                        | 30,000,000  |                              | None       
|6.80% Series due 2004        |  |                        | 14,500,000  |                              | None       
|16-1/4% Series due 1987      |  |                        | 30,000,000  |                              | None       
|6-1/2% Series due 1983       |  |                        | 15,000,000  |                              | None       
|7-1/4% Series due 1983       |  |                        | 25,500,000  |                              | None       
|14-7/8% Series due 1987-1991 |  |                        | 30,000,000  |                              | None       
|16% Series due 1996          |  |                        | 25,000,000  |                              | None       
|15-3/4% Series due 1989      |  |                        | 40,000,000  |                              | None       
|13-1/2% Series due 1989      |  |                        | 100,000,000 |                              | None       
|14.05% Series due 1991       |  |                        | 30,000,000  |                              | None       
|14-1/8% Series due 1991      |  |                        | 20,000,000  |                              | None       
|10-7/8% Series due 1987      |  |                        | 30,000,000  |                              | None       
|9-3/4% Series due 2016       |  |                        | 50,000,000  |                              | None       
|7.00% Series A due 2031      |  |                        | 18,900,000  |                              | None       
|7.00% Series B due 2031      |  |                        | 308,600,000 |                              | None       
|7.60% Series due 2003        |  |                        | 135,000,000 |                              | None       
|6-1/2% Series due 2005       |  |                        | 65,000,000  |                              | 65,000,000 
|6.20% Series due 2006        |  |                        | 100,000,000 |                              | 100,000,000



-11-



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|                                |  |                        |  |                              |  
|------------------------------- |  | ---------------------- |  | ---------------------------- | -
|Series                          |  | PrincipalAmount Issued |  | Principal Amount Outstanding |  
|5.10% Series due 2023           |  | 13,982,500             |  | 13,487,500                   |  
|7-1/2% Series A due 2032        |  | 14,500,000             |  | 14,500,000                   |  
|7-1/2% Series B due 2027        |  | 21,940,000             |  | 21,940,000                   |  
|7-1/2% Series C due 2032        |  | 10,000,000             |  | 10,000,000                   |  
|9-1/2% Series due 2003          |  | 702,200,000            |  | None                         |  
|8% Series due 2005              |  | 735,000,000            |  | None                         |  
|3-1/2% Series due in 2007       |  | 300,000,000            |  | None                         | *
|5.30% Series due 2031           |  | 18,900,000             |  | 18,900,000                   |  
|5.30% Series A due 2031         |  | 108,600,000            |  | 108,600,000                  |  
|2.65% Series B due 2031         |  | 100,000,000            |  | 100,000,000                  |  
|Variable Rate Series C due 2031 |  | 100,000,000            |  | 100,000,000                  |  

| | 
| | 

| | * | Upon issuance of the bonds of the 2010 Series pursuant to this Supplemental Indenture, the 3-1/2% First Mortgage Bonds Series due 2007 will be retired and will no longer be
outstanding under the Indenture.
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



hereinafter sometimes called
Bonds of the First through Forty-eighth Series; 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 of such series shall be established by Resolution of the Board of
Directors of the Company and 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 may also contain such provisions not inconsistent with the
provisions of the Mortgage as the Board of 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 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, or the Company may cure any ambiguity contained therein or in any supplemental indenture, or may establish the terms and provisions of any series of bonds other than said 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



WHEREAS, the Company now desires to create a new series of
bonds; and



-12-



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WHEREAS, the execution and delivery by the Company of this Forty-fourth Supplemental Indenture, and the
terms of the Bonds of the 2010 Series, hereinafter referred to, have been duly authorized by the Board of Directors of the Company by appropriate Resolutions of said Board of Directors;



NOW, THEREFORE, THIS INDENTURE WITNESSETH:



That Kansas Gas and Electric Company, in consideration of the premises and of One Dollar ($1) to it duly paid by the
Trustees at or before the ensealing and delivery of these presents, the receipt whereof is hereby acknowledged, and in further evidence of assurance of the estate, title and rights of the Trustees and in order further to secure the payment both of
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 said bonds, 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 BNY Midwest Trust Company and to Judith L. Bartolini, as Trustees under the Mortgage, and to their successor or successors in said trust, and to said Trustees and their successors and assigns forever, all
property, real, personal and mixed, acquired by the Company after the date of the execution and delivery of the Mortgage, in addition to property covered by the First through the Forty-third Supplemental Indentures (except any herein or in the
Mortgage, as heretofore supplemented, expressly excepted), now owned or, subject to the provisions of Section 87 of the Mortgage, hereafter acquired by the Company and wheresoever situated, including (without in anywise limiting or impairing by the
enumeration of the same the scope and intent of the foregoing or of any general description contained in this Forty-fourth Supplemental Indenture) all lands, flowage rights, water rights, flumes, raceways, dams, rights of way and roads; all steam
and power houses, gas plants, street lighting systems, standards and other equipment incidental thereto, telephone, radio and television systems, air-conditioning systems and equipment incidental thereto, water works, steam heat and hot water
plants, lines, service and supply systems, bridges, culverts, tracks, rolling stock, ice or refrigeration plants and equipment, street and interurban railway systems, offices, buildings and other structures and the equipment thereof; all machinery,
engines, boilers, dynamos, electric and gas 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, chattels and chooses in action; all municipal and other franchises; all lines for the transmission and distribution of electric
current, gas, steam heat or water for any purpose, including 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 real estate or the occupancy of the same and (except as herein or in the Mortgage, as heretofore supplemented, expressly excepted), all the right, title and interest of the Company in and to all other
property of any kind or nature appertaining to and/or used and/or occupied and/or enjoyed in connection with any property hereinbefore or in the Mortgage, as heretofore supplemented, described.



TOGETHER WITH all and singular the tenements, hereditarnents and
appurtenances belonging or in anywise appertaining to the aforesaid property or any part thereof, with the reversion and



-13-



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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 may hereafter acquire in and to the aforesaid property and
franchises and every part and parcel thereof.



IT IS HEREBY
AGREED by the Company that, subject to the provisions of Section 87 of the Mortgage, all the property, rights and franchises acquired by the Company after the date hereof (except any herein or in the Mortgage, as heretofore supplemented, expressly
excepted), shall be as fully embraced within the lien hereof and the lien of the Mortgage, as if such property, rights and franchises were now owned by the Company and were specifically described herein and conveyed hereby.



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 hereby expressly excepted from the lien and operation of this Forty-fourth Supplemental Indenture and from the
lien and operation of the Mortgage, viz.: (1) cash, shares of stock and obligations (including bonds, notes and other securities) not hereafter specifically pledged, paid, deposited or delivered under the Mortgage or covenanted so to be; (2)
merchandise, equipment, materials or supplies held for the purpose of sale in the usual course of business and fuel, oil and similar materials and supplies consumable in the operation of any properties of the Company; vehicles and automobiles; (3)
bills, notes and accounts receivable, and all contracts, leases and operating agreements not specifically pledged under the Mortgage or covenanted so to be; and (4) electric energy, and other materials or products generated, manufactured, produced
or purchased by the Company for sale, distribution or use in the ordinary course of its business; provided, however, that the property and rights expressly excepted from the lien and operation of the Mortgage and this Forty-fourth Supplemental
Indenture in the above subdivisions (2) and (3) shall (to the extent permitted by law) cease to be so excepted in the event that either or both of the Trustees or a receiver or trustee shall enter upon and take possession of the Mortgaged and
Pledged Property in the manner provided in Article XII of the Mortgage by reason of the occurrence of a Default as defined in said Article XII.



THERE is expressly excepted from the lien of the Mortgage and from the lien hereof all property of the Company located in the State of Missouri now owned
or hereafter acquired unless such property in the State of Missouri shall be subjected to the lien of the Mortgage by an indenture or indentures supplemental thereto, pursuant to authorization by the Board of Directors of the Company.



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 the Trustees, their successors and assigns forever.



IN TRUST NEVERTHELESS, for the same purposes and upon the same terms, trusts
and conditions and subject to and with the same provisos and covenants as are set forth in the Mortgage, as supplemented, this Forty-fourth Supplemental Indenture being supplemental thereto.



-14-



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AND IT IS HEREBY COVENANTED by the Company that all the terms, conditions, provisos, covenants and
provisions contained in the Mortgage, as supplemented, shall affect and apply to the property hereinbefore described and conveyed and to the estate, rights, obligations and duties of the Company and Trustees and the beneficiaries of the trust with
respect to said property, and to the Trustees and their successors as Trustees of said property 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 the Trustees by the Mortgage as a part of the property therein stated to be conveyed.



The Company further covenants and agrees to and with the Trustees and their successors in said trust under the Mortgage, as follows:



ARTICLE I



2010 SERIES OF BONDS



SECTION 1. (I) There shall be a series of bonds designated 4.6% Series due 2010 (herein sometimes referred to as the Bonds of the 2010
Series), each of which shall also bear the descriptive title, First Mortgage Bond, and the form thereof, which is established by Resolution of the Board of Directors of the Company, shall contain suitable provisions with respect to the matters
hereinafter in this Article I specified. Bonds of the 2010 Series shall be limited to $350,000,000 in aggregate principal amount, except as provided in Section 16 of the Mortgage, shall mature on May 6, 2010, and shall be issued as fully registered
bonds in denominations of Five Thousand Dollars and in any multiple or multiples of Five Thousand Dollars. Bonds of the 2010 Series shall bear interest at the rate of 4.6% per annum payable (subject to the second paragraph of Section 1(III)) on the
interest payment dates for the Loans (as defined below). Every Bond of the 2010 Series shall bear interest from each interest payment date for the Loans next preceding the date thereof, unless no interest has been paid on this Bond in which case
from May 6, 2005. The principal of and interest on Bonds of the 2010 Series shall be payable at the office or agency of the Company in the Borough of Manhattan, 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 2010 Series shall be dated as in Section 10 of the Mortgage provided.



(II) Bonds of the 2010 Series are redeemable prior to maturity only upon demand therefor by the Collateral Agent. To effect the redemption of Bonds of the
2010 Series, the Collateral Agent shall deliver to the Trustee (and deliver a copy thereof to the Company) a written demand (hereinafter referred to as a Redemption Demand) for the redemption of Bonds of the 2010 Series, signed by an
authorized officer and dated the date of its delivery to the Corporate Trustee, stating (i) that an Event of Default (as defined in the Collateral Agreement and as defined in the Credit Agreement referred to below) has occurred and is continuing,
(ii) that there are not sufficient available funds held by the Collateral Agent pursuant to the Collateral Agreement to make all payments required as a result of such Event of Default, (iii) the amount of funds, in addition to available funds held
by the Collateral Agent pursuant to the Collateral Agreement, required to make such payments, and (iv) the principal amount of Bonds of the 2010 Series the Collateral Agent demands to have redeemed and the redemption



-15-



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date therefor which date should be at least thirty-one (31) days after the date of such Redemption Demand
(provided, such principal amount shall not exceed the amount of funds specified pursuant to the foregoing clause (iii)). The Trustee may conclusively presume the statements contained in the Redemption Demand to be correct. Redemption of Bonds
of the 2010 Series shall in all cases be at a price equal to the principal amount of the Bonds to be redeemed together with accrued interest to the redemption date, and such amount shall become and be due and payable on the redemption date.



The Company hereby covenants that if a Redemption Demand shall
be delivered to the Corporate Trustee, the Company will deposit, on or before the redemption date, with the Corporate Trustee, in accordance with Article X of the Mortgage, an amount in cash sufficient to redeem the Bonds of the 2010 Series so
called for redemption.



(III) All Bonds of the 2010 Series
shall be issued and pledged by the Company to the Collateral Agent pursuant to a Collateral and Guarantee Agreement dated as of May 6, 2005 among the Company, Westar Energy, Inc. (WEI) and JPMorgan Chase Bank, N.A. (in such capacity, the
Collateral Agent) to secure the payment of the principal of, and up to 4.6% per annum of the interest on any of the loans issued pursuant to the $350,000,000 Amended and Restated Credit Agreement, dated as of May 6, 2005 among WEI,
JPMorgan Chase Bank, N.A., as administrative agent, the other agents party thereto, and the lenders party thereto, (the Credit Agreement and the loans thereunder are referred to collectively as the Loans).



The obligation of the Company to make payments with respect to the principal
of and interest on Bonds of the 2010 Series (including without limitation upon maturity thereof) shall be fully or partially, as the case may be, satisfied and discharged to the extent that, at the time that any such payment shall be due, the then
due principal of and interest on the Loans shall have been fully or partially paid, or there shall be held by the Collateral Agent pursuant to the Collateral Agreement sufficient available funds to fully or partially pay the then due principal of
and interest on the Loans. Notwithstanding any other provisions of this Supplemental Indenture or the Mortgage, interest on the Bonds of the 2010 Series shall be deemed fully or partially satisfied and discharged as provided herein even if the
interest rate on Bonds of the 2010 Series may be higher or lower than the interest rate on any of the Loans at the time interest on any such Loans is paid. The Corporate Trustee may conclusively presume that the obligation of the Company to make
payments with respect to the principal of and interest on Bonds of the 2010 Series shall have been fully satisfied and discharged unless and until the Corporate Trustee shall have received a written notice from the Collateral Agent, signed by an
authorized officer, stating (i) that timely payment of the principal of or interest on the Loans required to be made by the Company has not been made, (ii) that there are not sufficient available funds held by the Collateral Agent pursuant to the
Collateral Agreement to make such payment and (iii) the amount of funds, in addition to available funds held by the Collateral Agent pursuant to the Collateral Agreement, required to make such payment.



(IV) At the option of the registered owner, any Bonds of the 2010 Series,
upon surrender thereof, for cancellation, at the office or agency of the Company in the Borough of Manhattan, City of New York, shall be exchangeable for a like aggregate principal amount of bonds of the same series of other authorized
denominations. The Bonds of the 2010 Series may bear such legends as may be necessary to comply with any law or with any rules or regulations made pursuant thereto or with the rules or regulations of any stock exchange or to conform to usage with
respect thereto.



-16-



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(V) Bonds of the 2010 Series shall be transferable 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, City of New York.



(VI) The Company may deliver to the Trustee in substitution for any Bonds of
the 2010 Series, mortgage bonds or other similar instruments of the Company or any successor entity, whether by merger, combination or acquisition of all or substantially all of the assets of the Company, or otherwise, issued under a mortgage and
deed of trust or similar instrument of the Company or any successor entity in like principal amount of like term and bearing the same rate of interest as the Bonds of the 2010 Series.



ARTICLE II



AMENDMENTS TO THE MORTGAGE AND RESERVATION OF RIGHTS



SECTION 1. The Company reserves the right, subject to appropriate corporate action, but without any consent or other action by holders of Bonds of the
2010 Series, or of any subsequent series of bonds, to make such amendments to the Mortgage, as supplemented, as shall be necessary in order to (A) permit the issuance of additional Prior Lien Bonds other than to the Corporate Trustee (i) in a
principal amount not to exceed the principal amount of Bonds which could then be issued on the basis of Property Additions under the Mortgage or (ii) upon the redemption or retirement of Prior Lien Bonds secured by such Prior Lien, (B) to remove the
requirement that Prior Lien Bonds be issued to the Corporate Trustee, (C) remove the provisions of Article V which eliminate from the calculation of unfunded net Property Additions available for issuance of Bonds the amount of any Property Additions
subject to a Prior Lien if the aggregate amount of Outstanding Prior Lien Bonds is 15% or more of the sum of the Outstanding Bonds and Prior Lien Bonds, and (D) make such other amendments to the Mortgage as may be necessary or desirable in the
opinion of the Company to effect the foregoing.



SECTION 2. The
Company reserves the right, subject to appropriate action, but without any consent or other action by holders of Bonds of the 2010 Series, or of any subsequent series of bonds, to clarify the ability of the Company to issue variable rate bonds under
the Mortgage, notwithstanding any provision of the Mortgage to the contrary. The Company may make such other amendments to the Mortgage as may be necessary or desirable in the opinion of the Company to effect the foregoing.



SECTION 3. The Company reserves the right, subject to appropriate action, but
without any consent or other action by holders of Bonds of the 2010 Series, or of any subsequent series of bonds, to amend the Mortgage to eliminate the requirements for the provision by the Company of a Net Earning Certificate by deleting Section
27, Section 28(6) and Section 30(3) and deleting the following language from the end of Section 26: and, in case the bonds are to be authenticated and delivered under the provisions of the next preceding paragraph of this Section by reason of
an increase in the aggregate



-17-



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principal amount of bonds authenticated and delivered under this Indenture having increased the aggregate principal
amount of bonds which may be authenticated and delivered within the limitations prescribed by this Section, a Net Earning Certificate showing the Net Earnings of the Company to be as required by Section 27 hereof. The Company may make such
other amendments to the Mortgage as may be necessary or desirable in the opinion of the Company to effect the foregoing.



SECTION 4. The Company reserves the right, subject to appropriate action, but without any consent or other action by holders of Bonds of the 2010 Series,
or of any subsequent series of bonds, to amend the Mortgage as may be necessary in order to permit the Company to deliver to the Trustee in substitution for any bonds issued under the Mortgage, mortgage bonds or other similar instruments of the
Company or any successor entity, whether by merger, combination or acquisition of all or substantially all of the assets of the Company, or otherwise, issued under a mortgage and deed of trust or similar instrument of the Company or any successor
entity in like principal amount of like term and bearing the same rate of interest as the original bonds.



SECTION 5. The Company reserves the right, subject to appropriate action, but without any consent or other action by holders of Bonds of the 2010 Series,
or of any subsequent series of bonds, to amend the Mortgage to add the following new section:



This Indenture shall be deemed to be a contract made under the laws of the State of Kansas and for all purposes shall be construed in accordance with the laws of the State of Kansas, without regard to conflicts
of laws principles thereof.



SECTION 6. The Company
reserves the right, subject to appropriate action, but without any consent or other action by holders of Bonds of the 2010 Series, or of any subsequent series of bonds, to amend the Mortgage to:



(I) Eliminate maintenance and improvement fund requirements;



(II) Simplify the provisions for release of obsolete property, de minimis
property releases and substitution of property and unfunded property;



(III) Permit additional terms of bonds or forms of bond in supplemental indentures, including terms for uncertificated and global securities and medium-term notes;



(IV) Make any changes necessary to conform the Mortgage with the requirements of the Trust Indenture Act;



(V) Add defeasance provisions providing for covenant and legal defeasance
options;



(VI) Permitting the Company to remove the trustee in
certain circumstances;



(VII) Providing for direction to the
trustee under the Mortgage to vote pledged prior lien bonds for specified amendments to the prior lien mortgage;



-18-



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(VIII) Providing broader investment directions to the trustee or permitting the Company to direct
investment of money held by the trustee, so long as there is no event of default under the Mortgage;



(IX) Amending the definition of Excepted Property to exclude property which generally cannot be mortgaged without undue administrative burden
(i.e., automobiles), but allowing the Company to subject Excepted Property to the Mortgage;



(X) Amending the definition of Bondable Property to allow all mortgaged property to be bondable;



(XI) Updating the definition of Permitted Liens.; and



(XII) Eliminate the requirement to have an individual trustee under the Mortgage.



ARTICLE III



MISCELLANEOUS PROVISIONS



SECTION 1. All Bonds of the 2010 Series acquired by the Company shall forthwith be delivered to the Corporate Trustee for cancellation.



SECTION 2. Subject to the amendments provided for in this Forty-fourth
Supplemental Indenture, the terms defined in the Mortgage, as heretofore supplemented, shall, for all purposes of this Forty-fourth Supplemental Indenture, have the meanings specified in the Mortgage, as heretofore supplemented.



SECTION 3. The Trustees hereby accept the trusts herein declared, provided,
created or supplemented and agree to perform the same upon the terms and conditions set forth herein and in the Mortgage, as heretofore amended and supplemented, and upon the following terms and conditions:



The Trustees shall not be responsible in any manner whatsoever for or in
respect of the validity or sufficiency of this Forty-fourth 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 XVI of the Mortgage, as heretofore amended and supplemented, shall apply to and form part of this Forty-fourth 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 Forty-fourth Supplemental Indenture.



SECTION 4. Subject to the provisions of Article XV and Article XVI of the Mortgage, as heretofore amended and supplemented, whenever in this Forty-fourth
Supplemental Indenture any of the parties hereto is named or referred to, this shall be deemed to include the successors or assigns of such party, and all the covenants and agreements in this Forty fourth Supplemental Indenture contained by or on
behalf of the Company or by or on behalf of the Trustees shall bind and inure to the benefit of the respective successors and assigns of such parties whether so expressed or not.



-19-



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SECTION 5. Nothing in this Forty-fourth 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
Forty-fourth Supplemental Indenture or any covenant, condition, stipulation, promise or agreement hereof, and all the covenants, conditions, stipulations, promises and agreements in this Forty-fourth Supplemental Indenture 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 of the coupons Outstanding under the Mortgage.



SECTION 6. This Forty-fourth 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.



-20-



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IN WITNESS WHEREOF, KANSAS GAS AND ELECTRIC COMPANY has caused its corporate name to be hereunto affixed,
and this instrument to be signed and sealed by Mark A. Ruelle, Vice President and Treasurer, and its corporate seal to be attested by Larry D. Irick, its Secretary for and on its behalf, BNY MIDWEST TRUST COMPANY has caused its corporate name to be
hereunto affixed, and this instrument to be signed and sealed by one of its duly authorized officers and its corporate seal to be attested by one of its Assistant Secretaries for and on its behalf, and Judith L. Bartolini has hereunto set her hand
and all as of the day and year first above written.



KANSAS GAS AND ELECTRIC COMPANYBy:

/s/ Mark A. RuelleMark A. RuelleVice President and Treasurer




[SEAL]



Attest:



|                  
|------------------
|/s/ Larry D. Irick
|Larry D. Irick    
|Secretary         



|Executed, | sealed and delivered by
|--------- | -----------------------

KANSAS GAS AND ELECTRIC COMPANY,

in the presence of:



|                      
|----------------------
|/s/ Peggy S. Wettengel
|Peggy S. Wettengel    
|                      
|/s/ Patti Beasley     
|Patti Beasley         



---

|                    |  |  |  |                                       |  |                      
|------------------- |  |  |  | ------------------------------------- |  | ---------------------
|                    |  |  |  | BNY MIDWEST TRUST COMPANY, as Trustee
|                    |  |  | 
|[SEAL]              |  |  |  |                                       |  |                      
|                    |  |  | 
|                    |  |  |  | By:                                   |  | /s/ D.G. Donovan     
|Attest:             |  |  |  |                                       |  | Vice President       
|                    |  |  | 
|/s/ M. Callahan     |  |  |  |                                       |  |                      
|Assistant Secretary |  |  |  |                                       |  |                      
|                    |  |  | 
|                    |  |  |  |                                       |  | /s/ J. Bartolini     
|                    |  |  |  |                                       |  | (Judith L. Bartolini)





|                                 
|---------------------------------
|Executed, sealed and delivered by
|BNY MIDWEST TRUST COMPANY        
|and JUDITH L. BARTOLINI, in the  
|presence of:                     
|                                 
|/s/ Roxane Ellwanger             
|                                 
|/s/ Jo Ann Schalk                



---

|                   |  |   |  |      |  | 
|------------------ |  | - |  | ---- |  | 
|STATE OF KANSAS    |  | ) |  |      |  | 
|                   |  | : |  | ss.: |  | 
|COUNTY OF SEDGWICK |  | ) |  |      |  | 



BE IT REMEMBERED, that
on this 6 th day of May, A.D. 2005, before me, the undersigned, a Notary Public within and for the County and State aforesaid, came Mark A. Ruelle, the Vice President and Treasurer of KANSAS GAS AND ELECTRIC COMPANY, a corporation duly organized,
incorporated and existing under the laws of the State of Kansas, who is personally known to me to be such officer, and who is personally known to me to be the same person who executed, as such officer, the within instrument of writing, and such
person duly acknowledged the execution of the same to be the act and deed of said corporation and that said instrument of writing was so executed by order of the Board of Directors of said corporation.



On this 6 th day of May, 2005, before me appeared Larry D. Irick, to me
personally known, who being by me duly sworn did say that he is the Secretary of KANSAS GAS AND ELECTRIC COMPANY, and that the seal affixed to the foregoing instrument is the corporate seal of said corporation, and that said instrument was signed
and sealed in behalf of said corporation by authority of its Board of Directors, and said Larry D. Irick acknowledged said instrument to be the free act and deed of said corporation.



On the 6 th day of May in the year 2005, before me personally appeared Mark A. Ruelle to me known, who, being by me duly
sworn, did depose and say that he is the Vice President and Treasurer of KANSAS GAS AND ELECTRIC COMPANY; that the seal affixed to the foregoing instrument is the corporate seal of said corporation, and that said instrument was signed and sealed in
behalf of said corporation by authority of its Board of Directors, and said Mark A. Ruelle acknowledged said instrument to be the free act and of said corporation.



IN WITNESS WHEREOF, I have hereunto subscribed my name and affixed my official seal on the day and year above written.



|       |  |                                
|------ |  | -------------------------------
|       |  | /s/ Merilee K. Martin          
|[SEAL] |  |                                
|       |  | NOTARY PUBLIC  STATE OF KANSAS
|       |  | MY APPOINTMENT EXPIRES 7/8/2007



---

|                  |  |   |  |      |  | 
|----------------- |  | - |  | ---- |  | 
|STATE OF ILLINOIS |  | ) |  |      |  | 
|                  |  | : |  | ss.: |  | 
|COUNTY OF COOK    |  | ) |  |      |  | 



BE IT REMEMBERED, that
on this 3rdday of May, A.D. 2005, before me, the undersigned, a Notary Public within and for the County and State
aforesaid, came D.G. Donovan, a Vice President of BNY Midwest Trust Company, a corporation, duly organized, incorporated and existing under the laws of the State of Illinois, who is personally known to me to be such officer, and who is personally
known to me to be the same person who executed, as such officer, the within instrument of writing, and such person duly acknowledged the execution of the same to be the act and deed of said corporation and that said instrument of writing was so
executed by authority of the Board of Directors of said corporation.



On this 3rdday of May, 2005, before me appeared M. Callahan, to me personally known, who being by me duly
sworn did say that she is an Assistant Vice President of BNY MIDWEST TRUST COMPANY, and that the seal affixed to the foregoing instrument is the corporate seal of said corporation, and that said instrument was signed and sealed in behalf of said
corporation by authority of its Board of Directors, and said M. Callahan acknowledged said instrument to be the free act and deed of said corporation.



On the 3rdday of May
in the year 2005, before me personally came D.G. Donovan, to me known, who, being by me duly sworn, did depose and say that he resides at Arlington Heights, IL; that he is a Vice President of BNY MIDWEST TRUST COMPANY, one of the corporations
described in and which executed the above instrument; that she knows the seal of said corporation; that the seal affixed to said instrument is such corporate seal; that it was so affixed by authority of the Board of Directors of said corporation,
and that he signed his name thereto by like authority.



IN
WITNESS WHEREOF, I have hereunto subscribed my name and affixed my official seal on the day and year above written.



/s/ A. HernandezNOTARY PUBLIC, STATE OF ILLINOISQUALIFIED IN COOK COUNTYCOMMISSION EXPIRES 7-8-06[SEAL]




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|                  |  |   |  |      |  | 
|----------------- |  | - |  | ---- |  | 
|STATE OF ILLINOIS |  | ) |  |      |  | 
|                  |  | : |  | ss.: |  | 
|COUNTY OF COOK    |  | ) |  |      |  | 



On this 3rdday of May in the year 2005, before me, the undersigned, a Notary Public in and for the State of Illinois, in the County of
Cook, personally appeared and came Judith L. Bartolini, to me known and known to me to be the person described in and who executed the within and foregoing instrument and whose name is subscribed thereto and acknowledged to me that he executed the
same.



IN WITNESS WHEREOF, I have hereunto subscribed my name
and affixed my official seal the day and year in this certificate first above written.



/s/ T. MosterdNOTARY PUBLIC, STATE OF ILLINOISQUALIFIED IN COOK COUNTYCOMMISSION EXPIRES 1/22/09[SEAL]




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AFFIDAVIT



|                   |  |   |  |     |  | 
|------------------ |  | - |  | --- |  | 
|STATE OF KANSAS    |  | ) |  |     |  | 
|                   |  | ) |  | SS: |  | 
|COUNTY OF SEDGWICK |  | ) |  |     |  | 



I, Larry D. Irick,
being first duly sworn on oath, depose and say:



1. I am the
Secretary of Kansas Gas and Electric Company, a corporation duly organized and existing under the laws of the State of Kansas (the Company). I am duly authorized to make this affidavit on behalf of the Company.



2. The Company has heretofore executed and delivered to BNY Midwest Trust
Company (as successor to Harris Trust and Savings Bank) (the Corporate Trustee) and Judith L. Bartolini (the Individual Trustee, together with the Corporate Trustee, the Trustees), a Mortgage and Deed of Trust,
dated as of April 1, 1940, (hereinafter called the Indenture), to secure the Companys First Mortgage Bonds.



3. The Company has heretofore executed and delivered to the Trustees supplemental indentures numbered First through Forty-third,
inclusive, (hereinafter called the Supplemental Indentures), creating other series of the Companys First Mortgage Bonds.



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4. The Indenture and all Supplemental Indentures confirmed unto the Trustees the real property situated
in the State of Kansas which is subject to the lien of the Indenture.



5. The Indenture and all Supplemental Indentures were duly received and filed for record in accordance with the laws of the State of Kansas, and the mortgage registration fee thereon provided for was, and has been, paid in full by the
Company.



6. Under the Fortieth Supplemental Indenture, the
Company duly paid the mortgage registration fee in the amount of $1,780,538.50, based upon $684,822,500 of the Companys indebtedness. The Fortieth Supplemental Indenture is found in the Sedgwick County Register of Deeds office at film 2062,
page 53.



7. The Company has executed and delivered to the
Trustees a new series of First Mortgage Bonds called 4.6% Series Due May 6, 2010 to be issued under and secured by the Indenture, the Supplemental Indentures and a new Supplemental Indenture dated as of May 6, 2005, (hereinafter called
the Forty-fourth Supplemental Indenture).



8. The
purpose of the Forty-fourth Supplemental Indenture is to reflect the issuance and pledge of $350,000,000 principal amount of First Mortgage Bonds.



9. $350,000,000 of the principal amount of the First Mortgage Bonds issued pursuant to the Forty-fourth Supplemental Indenture tendered for filing
constitutes the same principal indebtedness covered or included in the Forty-first Supplemental Indenture with BNY Midwest Trust Company and Judith L. Bartolini, Trustees, the same lender.



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10. Under the Forty-fourth Supplemental Indenture the registration fee with respect to all of the
indebtedness of $350,000,000 has been previously paid by the Company in connection with the Forty-first Supplemental Indenture and by virtue thereof is considered by the Company to be the same indebtedness, and thus exempt from the payment of
further registration fees pursuant to the provisions of K.S.A. 1990 Supp. 79-3102(d)(3).



[REMAINDER OF PAGE LEFT BLANK INTENTIONALLY]



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FURTHER AFFIANT SAITH NAUGHT.



/s/ Larry D. IrickLarry D. Irick, SecretaryKansas Gas and Electric Company




Subscribed and
sworn to before me this 6th day of May, 2005.



/s/ Patti BeasleyNotary Public




[SEAL]



My Commission Expire 11-18-08



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