SECURITIES AND EXCHANGE COMMISSION
                                Washington, D. C.
                                   FORM U-6B-2
                           Certificate of Notification

    Filed by a registered holding company or subsidiary thereof pursuant to Rule
U-20-(d) [Reg.  Section 250.20,  Paragraph 36,652] or U-47 [Reg. Section 250.47,
Paragraph 36,620] adopted under the Public Utility Holding Company Act of 1935

Certificate is filed by: Public Service Company of Colorado (the "Company")


     This certificate is notice that the above named company has issued, renewed
or guaranteed the security or securities  described herein which issue,  renewal
or guaranty was exempted from the  provisions of Section 6(a) of the Act and was
neither the subject of a  declaration  or  application  on Form U-1 nor included
within the  exemption  provided  by Rule U-48 [Reg.  Section  250.48,  Paragraph
36,621].

1.   Type of the security or securities:
     a)   First Collateral Trust Bonds, Series No. 6
     b)   First Mortgage Bonds, Collateral Series F
2.   Issue, renewal or guaranty:
     a)   issue
     b)   issue
3.   Principal amount of each security:
     a)   $250,000,000
     b)   $250,000,000
4.   Rate of  interest  per  annum  of each  security:
     a) 6.0%
     b) does not bear interest
5.   Date of issue,  renewal or guaranty of each security:
     a) April 20, 1998
     b) April 20, 1998
6.   If renewal of security,  give date of original issue:  Not  applicable.
7.   Date of maturity of each security:
     a)   April 15, 2003
     b)   April 15, 2003
8.   Name of the person to whom each security was issued, renewed or guaranteed:
     a)   Public - investors
     b)   U.S. Bank Trust National Association (trustee)
9.   Collateral given with each security, if any:
     a)   Lien on electric  property  of the  Company as  provided in  Indenture
          dated as of  October  1, 1993 and  First  Mortgage  Bonds,  Collateral
          Series F
     b)   Lien on all assets of the Company as provided in Indenture dated as of
          December 1, 1939
 10. Consideration received for each security:
     a)   $250,000,000
     b)   $0 (the First Collateral Trust Bonds,  Series No. 6 were issued on the
          basis of the First  Mortgage  Bonds,  Collateral  Series F which  were
          issued to the trustee for the benefit of the  bondholders of the First
          Collateral Trust Bonds, Series No. 6)
11.  Application of proceeds of each security:
     a)   Net proceeds  used for general  corporate  purposes and to repay short
          term and other debt incurred for such purposes.
     b)   Not applicable.
12.  Indicate by a check after the applicable statement below whether the issue,
     renewal or guaranty of each  security  was exempt  from the  provisions  of
     Section 6(a) because of:
     a)   the  provisions  contained in the first  sentence of Section 6(b): Not
          applicable
     b)   the provisions  contained in the fourth  sentence of Section 6(b): Not
          applicable
     c)   the provisions contained in any rule of the commission other than Rule
          U-48: Both issuances.

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13.  If the security or  securities  were exempt from the  provisions of Section
     6(a) by virtue of the first  sentence  of Section  6(b),  give the  figures
     which indicate that the security or securities aggregate (together with all
     other than  outstanding  notes and drafts of a maturity  of nine  months or
     less,  exclusive of days of grace, as to which such company is primarily or
     secondarily  liable) not more than 5 percentum of the principal  amount and
     par value of the other securities of such company then outstanding. (Demand
     notes,  regardless  of how long  they may have been  outstanding,  shall be
     considered  as maturing  in not more than nine  months for  purposes of the
     exemption  from  Section  6(a) or the Act granted by the first  sentence of
     Section 6(b).
       Not applicable.
14.  If the security or  securities  are exempt from the  provisions  of Section
     6(a)  because of the fourth  sentence of Section  6(b),  name the  security
     outstanding on January 1, 1935, pursuant to the terms of which the security
     or securities herein described have been issued.
       Not applicable.
15.  If the security or  securities  are exempt from the  provisions  of Section
     6(a)  because  of any rule of the  Commission  other  than Rule U-48  [Reg.
     Section 250.48,  Paragraph 36,621] designate the rule under which exemption
     is claimed.
       Rule 52(a)

                                          Public Service Company of Colorado


                                          By: /s/ James D. Steinhilper
                                              _____________________________
                                                  James D. Steinhilper
                                                  Treasurer


Date: April 28, 1998