PUBLIC SERVICE CO OF COLORADO
10-Q, 1999-05-14
ELECTRIC & OTHER SERVICES COMBINED
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q

(Mark One)
  [X]      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
           THE SECURITIES EXCHANGE ACT OF 1934

           For the quarterly period ended March 31, 1999

                      OR

  [ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
           OF THE SECURITIES EXCHANGE ACT OF 1934

           For the transition period from _____________   to   ____________

             Exact name of registrant as specified in its charter,
             State or other jurisdiction of incorporation or 
             organization, Address of principal executive offices
Commission   and Registrant's Telephone Number,                     IRS Employer
File Number  including area code                              Identification No.
- -----------  -------------------                              ------------------
1-12927    NEW CENTURY ENERGIES, INC.                            84-1334327
           (a Delaware Corporation)
           1225 17th Street
           Denver, Colorado  80202
           Telephone (303) 571-7511

1-3280     PUBLIC SERVICE COMPANY OF COLORADO                    84-0296600
           (a Colorado Corporation)
           1225 17th Street
           Denver, Colorado  80202
           Telephone (303) 571-7511

1-3789     SOUTHWESTERN PUBLIC SERVICE COMPANY                   75-0575400
           (a New Mexico Corporation)
           Tyler at Sixth
           Amarillo, Texas  79101
           Telephone (303) 571-7511
                                    -------------------

      Indicate by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes X No

      On May 11, 1999,  114,950,360 shares of the Registrant's Common Stock were
outstanding.   The  aggregate   market  value  of  this  common  stock  held  by
nonaffiliates  based on the  closing  price on the New York Stock  Exchange  was
approximately $4,353,744,885.

Public Service Company of Colorado and Southwestern  Public Service Company meet
the conditions set forth in General Instruction H(1)(a) and (b) of Form 10-Q and
are therefore filing this Form 10-Q with the reduced disclosure format specified
in General Instruction H (2) to such Form 10-Q.




<PAGE>

                                Table of Contents

                        PART I - FINANCIAL INFORMATION

Item l.Financial Statements ............................................    1

Item 2.Management's Discussion and Analysis of Financial
        Condition and Results of Operations ............................   33


                          PART II - OTHER INFORMATION


Item 1.  Legal Proceedings..............................................   45

Item 6.  Exhibits and Reports on Form 8-K...............................   45








This  combined  Form 10-Q is  separately  filed by New Century  Energies,  Inc.,
Public Service  Company of Colorado and  Southwestern  Public  Service  Company.
Information contained herein relating to any individual company is filed by such
company on its own behalf.  Each  registrant  makes  representations  only as to
itself and makes no other representations  whatsoever as to information relating
to the other registrants.

This report should be read in its  entirety.  No one section of the report deals
with all aspects of the subject matter.

                           FORWARD-LOOKING INFORMATION

The  following  discussions  include  "forward-looking  statements"  within  the
meaning of Section  27A of the  Securities  Act of 1933 and  Section  21E of the
Securities  Exchange  Act of  1934.  Investors  and  prospective  investors  are
cautioned that the forward-looking  statements  contained herein with respect to
the  revenues,   earnings,  capital  expenditures,   resolution  and  impact  of
litigation,  Year 2000 issues,  competitive performance,  or other prospects for
the business of New Century  Energies,  Inc., Public Service Company of Colorado
and/or  Southwestern  Public  Service  Company  or their  affiliated  companies,
including any and all underlying assumptions and other statements that are other
than  statements  of  historical  fact,  may be influenced by factors that could
cause actual  outcomes and results to be materially  different  than  projected.
Such  factors  include,  but are not limited to, the effects of weather,  future
economic  conditions,  the  performance  of  generating  units,  fuel prices and
availability,  regulatory  decisions  and the  effects  of  changes in state and
federal  laws,  the pace of  deregulation  of  domestic  retail  natural gas and
electricity markets, the timing and extent of change in commodity prices for all
forms of energy,  capital spending  requirements,  the evolution of competition,
earnings   retention  and  dividend  payout  policies,   changes  in  accounting
standards,  the  consummation  of the proposed merger with Northern States Power
Company and other factors. From time to time, New Century Energies, Inc., Public
Service Company of Colorado and Southwestern  Public Service Company may publish
or otherwise  make available  forward-looking  statements.  All such  subsequent
forward-looking  statements,  whether  written or oral and whether made by or on
behalf  of each  company,  are also  expressly  qualified  by  these  cautionary
statements.


                                       i
<PAGE>


TERMS
The abbreviations or acronyms used in the text and notes are defined below:

Abbreviation or Acronym                                           Term
- --------------------------------------------------------------------------------
AEP....................................................  American Electric Power
CERCLA ....................................Comprehensive Environmental Response,
                                                  Compensation and Liability Act
Cheyenne..................................Cheyenne Light, Fuel and Power Company
CPUC....................The Public Utilities Commission of the State of Colorado
Denver District Court .............District Court in and for the City and County
                                                                       of Denver
DOE.........................................................Department of Energy
DSM.......................................................Demand Side Management
Dth....................................................................Dekatherm
ECA.......................................................Energy Cost Adjustment
EPA.........................................U.S. Environmental Protection Agency
e prime...........................................e prime, inc. and subsidiaries
FERC........................................Federal Energy Regulatory Commission
Fort St. Vrain ...............................Fort St. Vrain Electric Generating
                                  Station, formerly a nuclear generating station
Fuelco ..........................................Fuel Resources Development Co.,
                                               a dissolved Colorado Corporation
GCA..........................................................Gas Cost Adjustment
ICA....................................................Incentive Cost Adjustment
IRS.....................................................Internal Revenue Service
Kwh................................................................kilowatt-hour
PSCo/SPS Merger....................the business combination between PSCo and SPS
Natural Fuels..........................................Natural Fuels Corporation
NCE or Company........................................New Century Energies, Inc.
NC Enterprises..............................................NC Enterprises, Inc.
NCI..............................................New Century International, Inc.
NMPRC..........................New Mexico Public Regulation Commission formerly,
                                        the New Mexico Public Utility Commission
NOx...............................................................Nitrogen Oxide
PCB.....................................................Polychlorinated Biphenyl
PSCo..........................................Public Service Company of Colorado
PSRI........................................................PSR Investments, Inc
PUHCA.....................Public Utility Holding Company Act of 1935, as amended
PRPs.............................................Potentially Responsible Parties
PSCCC.............................................PS Colorado Credit Corporation
PUCT..........................................Public Utility Commission of Texas
QF...........................................................Qualifying Facility
Quixx.........................................Quixx Corporation and subsidiaries
SEC...........................................Securities and Exchange Commission
SO2...............................................................Sulfur Dioxide
SPS..........................................Southwestern Public Service Company
SFAS 71.....................Statement of Financial Accounting Standards No. 71 -
                     "Accounting for the Effects of Certain Types of Regulation"
SFAS 112...................Statement of Financial Accounting Standards No. 112 -
                             "Employers' Accounting for Postemployment Benefits"
SFAS 121...................Statement of Financial Accounting Standards No. 121 -
              "Accounting for the Impairment of Long-Lived Assets and Long-Lived
                Assets to Be Disposed Of"
Thunder Basin.........................................Thunder Basin Coal Company
UE..............................Utility Engineering Corporation and subsidiaries
WGI.....................................................WestGas InterState, Inc.
Yorkshire Electricity............................Yorkshire Electricity Group plc
Yorkshire Power.......................................Yorkshire Power Group Ltd.

                                       ii
<PAGE>


                   NEW CENTURY ENERGIES, INC. AND SUBSIDIARIES
                      CONSOLIDATED CONDENSED BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)


                                     ASSETS

                                                          March 31, December 31,
                                                             1999       1998   
                                                             ----       ----   

Property, plant and equipment, at cost:
   Electric ...........................................   $7,116,116  $7,097,070
   Gas ................................................    1,220,178   1,210,605
   Steam and other ....................................      115,606     111,620
   Common to all departments ..........................      418,695     423,287
   Construction in progress ...........................      468,825     391,100
                                                          ----------  ----------
                                                           9,339,420   9,233,682
   Less: accumulated depreciation .....................    3,410,190   3,351,659
                                                          ----------  ----------
     Total property, plant and equipment ..............    5,929,230   5,882,023
                                                          ----------  ----------



Investments, at cost:
 Investment in Yorkshire Power and other unconsolidated
   subsidiaries (Note 3) ..............................      347,911     340,874
   Other ..............................................       71,152      64,562
                                                          ----------  ----------
    Total investments .................................      419,063     405,436
                                                          ----------  ----------


Current assets:
   Cash and temporary cash investments ................       84,817      56,667
   Accounts receivable, less reserve for uncollectible
     accounts ($4,105 at March 31, 1999; $4,842 at
     December 31, 1998) ...............................      323,767     319,145
   Accrued unbilled revenues ..........................      113,400     130,455
   Recoverable purchased gas and electric energy
     costs - net ......................................       19,034      66,154
   Materials and supplies, at average cost ............       70,552      69,298
   Fuel inventory, at average cost ....................       27,934      24,653
   Gas in underground storage, at cost (LIFO) .........       30,935      52,624
   Prepaid expenses and other .........................       86,788      83,561
                                                          ----------  ----------
    Total current assets ..............................      757,227     802,557
                                                          ----------  ----------

Deferred charges:
   Regulatory assets (Note 1) .........................      375,476     381,632
   Unamortized debt expense ...........................       28,353      27,408
   Other ..............................................      185,043     172,908
                                                          ----------  ----------
    Total deferred charges ............................      588,872     581,948
                                                          ----------  ----------
                                                          $7,694,392  $7,671,964
                                                          ==========  ==========


      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.

                                       1
<PAGE>


                   NEW CENTURY ENERGIES, INC. AND SUBSIDIARIES
                      CONSOLIDATED CONDENSED BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)


                             CAPITAL AND LIABILITIES

                                                       March 31,    December 31,
                                                          1999          1998   
                                                          ----          ----    

Common stock .......................................  $ 1,884,687    $ 1,866,386
Retained earnings ..................................      775,016        740,677
Accumulated other comprehensive income .............       (2,856)         7,764
                                                      -----------    -----------
    Total common equity ............................    2,656,847      2,614,827

PSCo and SPS obligated mandatorily redeemable 
  preferred securities of subsidiary trusts holding
  solely subordinated debentures of PSCo and
  SPS (Note 7) ....................................       294,000        294,000
Long-term debt of subsidiaries ....................     2,304,985      2,205,545
                                                      -----------    -----------
                                                        5,255,832      5,114,372

Noncurrent liabilities:
  Employees' postretirement benefits other 
     than pensions.................................        58,449         61,732
  Employees' postemployment benefits ..............        31,109         31,326
                                                      -----------    -----------
    Total noncurrent liabilities ..................        89,558         93,058
                                                      -----------    -----------

Current liabilities:
   Notes payable and commercial paper .............       408,900        524,394
   Long-term debt due within one year .............       124,477        138,165
   Accounts payable ...............................       255,555        285,080
   Dividends payable ..............................        69,523         69,271
   Recovered electric energy costs - net ..........        26,284         18,760
   Customers' deposits ............................        31,221         30,793
   Accrued taxes ..................................       133,954         85,384
   Accrued interest ...............................        41,854         50,229
   Other ..........................................       115,294        122,747
                                                      -----------    -----------
    Total current liabilities .....................     1,207,062      1,324,823
                                                      -----------    -----------

Deferred credits:
   Customers' advances for construction ...........        56,612         55,400
   Unamortized investment tax credits .............        99,650        100,925
   Accumulated deferred income taxes ..............       954,295        947,247
   Other ..........................................        31,383         36,139
                                                      -----------    -----------
    Total deferred credits ........................     1,141,940      1,139,711
                                                      -----------    -----------

Commitments and contingencies (Notes 4 and 5)
                                                      $ 7,694,392    $ 7,671,964
                                                      ===========    ===========


      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.


                                       2
<PAGE>


                   NEW CENTURY ENERGIES, INC. AND SUBSIDIARIES
                   CONSOLIDATED CONDENSED STATEMENTS OF INCOME
                                   (Unaudited)
                             (Thousands of Dollars)

                                                            Three Months Ended
                                                                 March 31,
                                                               1999      1998 
                                                               ----      ---- 

Operating revenues:
  Electric...........................................        $628,706  $599,988
  Gas................................................         347,688   319,707
  Other..............................................          15,029    19,809
                                                              -------   ------
                                                              991,423   939,504

Operating expenses:
  Fuel used in generation............................         133,849   140,919
  Purchased power....................................         161,420   148,864
  Cost of gas sold...................................         261,631   224,912
  Other operating and maintenance expenses-regulated.         129,426   129,605
  Other operating and maintenance expenses-nonregulated        20,683    18,076
  Depreciation and amortization......................          69,502    62,418
  Taxes (other than income taxes) ...................          37,620    32,873
                                                              -------    ------
                                                              814,131   757,667
                                                              -------   -------
Operating income......................................        177,292   181,837

Other income and deductions:
  Equity in earnings of Yorkshire Power and other 
   unconsolidated subsidiaries (Note 3) .............          15,811     3,752
  Miscellaneous income and deductions - net..........          (3,542)   (2,968)
                                                              -------    ------
                                                               12,269       784

Interest charges and preferred dividends of subsidiaries:
  Interest on long-term debt.........................          41,410    40,473
  Other interest.....................................           6,889     8,494
  Allowance for borrowed funds used during construction        (2,916)   (4,506)
  Dividends  on  PSCo  and  SPS  obligated  mandatorily
   redeemable preferred securities of subsidiary
   trusts holding solely subordinated  debentures of
   PSCo and SPS ......................................          5,763     1,963
  Dividend requirements on preferred stock of
   subsidiaries                                                     -     2,929
                                                                 ----     -----
                                                               51,146    49,353
                                                               ------    ------

Income before income taxes............................        138,415   133,268
Income taxes..........................................         37,115    47,119
                                                              -------    ------
Net income............................................       $101,300  $ 86,149
                                                             ========  ========

Weighted average common shares outstanding:
  Basic..............................................         114,681   110,973
  Diluted............................................         114,743   111,134

Basic and diluted earnings per share of common stock
 outstanding ........................................          $ 0.88    $ 0.78
                                                               ======    ======


      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.

                                       3
<PAGE>


                   NEW CENTURY ENERGIES, INC. AND SUBSIDIARIES
                 CONSOLIDATED CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY
                                   (Unaudited)
                      (Thousands of Dollars, Except Share Information)
                   Three Months Ended March 31, 1999 and 1998

<TABLE>
<CAPTION>
                                                                                           Accumulated
                                                                  Paid                        Other
                                   Common Stock, $1 par value      in          Retained   Comprehensive
                                       Shares        Amount      Capital       Earnings       Income          Total 
                                       ------        ------      -------       --------       ------          ----- 

<S>                                 <C>            <C>          <C>            <C>             <C>         <C>
Balance at December 31, 1997        110,749,301    $  110,749   $1,583,446     $ 659,050       $4,142      $2,357,387
Comprehensive income:
  Net income..........                        -             -            -        86,149            -          86,149
  Foreign currency translation
  adjustment.........                         -             -            -             -        5,260           5,260
                                                                                                              -------
    Comprehensive income (Note 1)                                                                              91,409

Dividends declared on common stock            -             -            -       (64,533)           -         (64,533)
Issuance of common stock:
  Employees' Savings Plan               217,690           218       10,150             -            -          10,368
  Dividend Reinvestment Plan            211,723           212        9,485             -            -           9,697
  Incentive Compensation Plans           60,816            61        1,831             -            -           1,892
                                         ------        ------      -------       -------      -------         -------

Balance at March 31, 1998           111,239,530    $  111,240   $1,604,912     $ 680,666       $9,402      $2,406,220
                                    ===========    ==========   ==========     =========       ======      ==========



Balance at December 31, 1998        114,490,772    $  114,491   $1,751,895     $ 740,677       $7,764      $2,614,827

Comprehensive income:
  Net income..........                        -             -            -       101,300            -         101,300
  Foreign currency translation
   adjustment.........                        -             -            -             -      (10,620)        (10,620)
                                                                                                              -------
    Comprehensive income (Note 1)                                                                              90,680

Dividends declared on common stock            -             -            -       (66,662)           -         (66,662)
Issuance of common stock:
  Employees' Savings Plan               200,880           201        8,266             -            -           8,467
  Dividend Reinvestment Plan            195,440           195        8,050             -            -           8,245
  Incentive Compensation Plans           37,890            38        1,551             -            -           1,589
  Other ..............                        -             -            -          (299)           -            (299)
                                        -------        ------      -------       -------       ------         -------

Balance at March 31, 1999           114,924,982    $  114,925   $1,769,762     $ 775,016     $(2,856)      $2,656,847     
                                    ===========    ==========   ==========     =========     =======       ==========
</TABLE>


Authorized shares of common stock were 260 million at March 31, 1999 and 1998.

      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.

                                       4
<PAGE>


                           NEW CENTURY ENERGIES, INC.
                                AND SUBSIDIARIES
                 CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
                             (Thousands of Dollars)


                                                             Three Months Ended
                                                                  March 31,
                                                               1999      1998 
                                                               ----      ---- 

Operating activities:
   Net income.........................................       $101,300   $86,149
   Adjustments to reconcile net income to net
    cash provided by operating activities:
     Depreciation and amortization....................         73,027    64,887
     Amortization of investment tax credits...........         (1,275)   (1,279)
     Deferred income taxes............................         (3,428)   (6,433)
     Equity in earnings of Yorkshire Power and other 
       unconsolidated subsidiaries, net ..............        (15,811)   (3,756)
     Allowance for funds used during construction.....           (173)        3
     Change in accounts receivable....................         (4,622)   15,373
     Change in inventories............................         17,154    36,913
     Change in other current assets...................         70,338    34,040
     Change in accounts payable.......................        (29,525)  (70,216)
     Change in other current liabilities..............         46,037    45,221
     Change in deferred amounts.......................        (17,440)    5,192
     Change in noncurrent liabilities.................         (3,500)    1,738
                                                              -------   -------
       Net cash provided by operating activities......        232,082   207,832

Investing activities:
   Construction expenditures..........................       (116,753) (127,989)
   Allowance for equity funds used during construction            173        (3)
   Proceeds from disposition of property, plant and
     equipment .......................................            715       441
   Purchase of other investments......................         (3,740)     (214)
   Sale of other investments..........................          5,181     5,458
                                                              -------   -------
       Net cash used in investing activities..........       (114,424) (122,307)

Financing activities:
   Proceeds from sale of common stock.................          8,789    13,038
   Proceeds from sale of long-term debt...............        149,118         -
   Redemption of long-term debt.......................        (65,212)  (51,854)
   Short-term borrowings - net........................       (115,494)   20,418
   Dividends on common stock..........................        (66,709)  (63,745)
                                                              -------   -------
       Net cash used in financing activities..........        (89,508)  (82,143)
                                                              -------   -------
       Net increase in cash and temporary cash 
          investments ................................         28,150     3,382
       Cash and temporary cash investments at beginning
          of period ..................................         56,667    72,623
                                                               ------    ------
       Cash and temporary cash investments at end
           of period .................................      $  84,817   $76,005
                                                            =========   =======



                The accompanying notes to consolidated financial statements
                     are an integral part of these financial statements


                                       5
<PAGE>


                       PUBLIC SERVICE COMPANY OF COLORADO
                                AND SUBSIDIARIES
                      CONSOLIDATED CONDENSED BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)

                                     ASSETS

                                                         March 31,  December 31,
                                                            1999        1998 
                                                            ----        ---- 

Property, plant and equipment, at cost:
   Electric ..........................................  $4,382,476   $4,369,134
   Gas................................................   1,180,826    1,171,198
   Steam and other....................................      71,973       71,986
   Common to all departments..........................     413,892      418,484
   Construction in progress...........................     322,273      264,752
                                                           -------      -------
                                                         6,371,440    6,295,554
   Less: accumulated depreciation ....................   2,285,493    2,241,165
                                                         ---------    ---------
     Total property, plant and equipment..............   4,085,947    4,054,389
                                                         ---------    ---------

Investments, at cost:
   Note receivable from affiliate (Note 3)............     192,620      192,620
   Other..............................................      18,123       22,664
                                                           -------       ------
    Total investments.................................     210,743      215,284
                                                           -------      -------

Current assets:
   Cash and temporary cash investments................      30,039       19,926
   Accounts receivable, less reserve for uncollectible
     accounts ($1,999 at March 31, 1999; $2,254 at
     December 31, 1998) ..............................     159,007      172,587
   Accrued unbilled revenues .........................      87,146      119,856
   Recoverable purchased gas and electric energy 
     costs - net .....................................      17,692       62,761
   Materials and supplies, at average cost............      48,559       47,881
   Fuel inventory, at average cost....................      25,640       22,361
   Gas in underground storage, at cost (LIFO).........      30,526       51,779
   Prepaid expenses and other.........................      40,204       46,523
                                                           -------       ------
    Total current assets..............................     438,813      543,674
                                                           -------      -------

Deferred charges:
   Regulatory assets (Note 1).........................     261,547      269,112
   Unamortized debt expense ..........................      18,289       17,874
   Other..............................................      85,274       77,303
                                                           -------       ------
    Total deferred charges............................     365,110      364,289
                                                           -------      -------
                                                        $5,100,613   $5,177,636
                                                        ==========   ==========



      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.

                                       6
<PAGE>


                       PUBLIC SERVICE COMPANY OF COLORADO
                                AND SUBSIDIARIES
                      CONSOLIDATED CONDENSED BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)

                             CAPITAL AND LIABILITIES

                                                         March 31,  December 31,
                                                            1999       1998 
                                                            ----       ---- 



Common stock..........................................  $1,302,119   $1,302,119
Retained earnings.....................................     344,650      325,213
                                                           -------      -------
    Total common equity...............................   1,646,769    1,627,332

PSCo obligated mandatorily redeemable preferred 
  securities of subsidiary trust holding solely 
  subordinated debentures of PSCo (Note 7) ...........     194,000      194,000
Long-term debt........................................   1,637,925    1,643,130
                                                         ---------    ---------
                                                         3,478,694    3,464,462
                                                         ---------    ---------

Noncurrent liabilities:
   Employees' postretirement benefits other than
     pensions .......................................       51,677       55,537
   Employees' postemployment benefits.................      27,195       27,195
                                                           -------      -------
    Total noncurrent liabilities......................      78,872       82,732
                                                           -------      -------

Current liabilities:
   Notes payable and commercial paper.................     339,400      402,795
   Long-term debt due within one year.................      33,520       44,481
   Accounts payable...................................     181,575      226,712
   Dividends payable..................................      46,502       46,461
   Customers' deposits................................      24,209       23,902
   Accrued taxes......................................     105,277       57,848
   Accrued interest...................................      31,140       36,729
   Current portion of accumulated deferred income taxes      2,022        8,142
   Other..............................................      63,693       68,729
                                                           -------      -------
    Total current liabilities.........................     827,338      915,799
                                                           -------      -------

Deferred credits:
   Customers' advances for construction...............      55,493       54,260
   Unamortized investment tax credits ................      93,265       94,459
   Accumulated deferred income taxes..................     543,094      538,581
   Other..............................................      23,857       27,343
                                                           -------      -------
    Total deferred credits............................     715,709      714,643
                                                           -------      -------

Commitments and contingencies (Notes 4 and 5).........     -------     --------
                                                        $5,100,613   $5,177,636
                                                        ==========   ==========


      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.

                                       7
<PAGE>


                       PUBLIC SERVICE COMPANY OF COLORADO
                                AND SUBSIDIARIES
                   CONSOLIDATED CONDENSED STATEMENTS OF INCOME
                                   (Unaudited)
                             (Thousands of Dollars)


                                                             Three Months Ended
                                                                  March 31,
                                                               1999      1998 
                                                               ----      ---- 

Operating revenues:
   Electric...........................................       $401,871  $375,446
   Gas................................................        254,171   265,483
   Other..............................................          3,377     3,713
                                                              -------   -------
                                                              659,419   644,642

Operating expenses:
   Fuel used in generation............................         51,865    50,629
   Purchased power....................................        134,775   124,057
   Gas purchased for resale...........................        172,842   176,482
   Other operating and maintenance expenses...........         94,511    93,945
   Depreciation and amortization......................         48,540    42,896
   Taxes (other than income taxes) ...................         23,487    19,969
   Income taxes  .....................................         29,214    36,818
                                                              -------   -------
                                                              555,234   544,796
                                                              -------   -------
Operating income......................................        104,185    99,846

Other income and deductions:
   Equity earnings in Yorkshire Power (Note 3)........              -     3,446
   Miscellaneous income and deductions - net..........         (1,566)   (2,885)
                                                              -------   -------
                                                               (1,566)      561

Interest charges:
   Interest on long-term debt.........................         29,883    28,578
   Other interest.....................................          5,220     5,653
   Allowance for borrowed funds used during construction       (2,223    (2,721)
   Dividends on PSCo obligated mandatorily redeemable 
     preferred securities of subsidiary trust holding
     solely subordinated debentures of PSCo (Note 7)            3,800         -
                                                                -----      ----
                                                               36,680    31,510
                                                               ------    ------

Net income............................................         65,939    68,897
Dividend requirements on preferred stock..............              -     2,929
                                                              -------   -------
Earnings available for common stock...................        $65,939   $65,968
                                                              =======   =======



      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.

                                       8
<PAGE>


                       PUBLIC SERVICE COMPANY OF COLORADO
                                AND SUBSIDIARIES
                 CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
                             (Thousands of Dollars)


                                                             Three Months Ended
                                                                  March 31,
                                                               1999      1998 
                                                               ----      ---- 

Operating activities:
   Net income.........................................        $65,939   $68,897
   Adjustments to reconcile net income to net
    cash provided by operating activities:
     Depreciation and amortization....................         50,507    44,124
     Amortization of investment tax credits...........         (1,194)   (1,197)
     Deferred income taxes............................            251      (801)
     Equity in earnings of Yorkshire Power............              -    (3,446)
     Change in accounts receivable....................         13,580    10,165
     Change in inventories............................         17,296    36,546
     Change in other current assets...................         84,098    32,739
     Change in accounts payable.......................        (45,137)  (46,326)
     Change in other current liabilities..............         37,111    39,889
     Change in deferred amounts.......................         (9,683)   (2,194)
     Change in noncurrent liabilities.................         (3,860)     (732)
                                                              -------   -------
       Net cash provided by operating activities......        208,908   177,664

Investing activities:
   Construction expenditures..........................        (86,857) (107,298)
   Proceeds from disposition of property, plant and
     equipment                                                 10,532     1,393
   Purchase of other investments......................           (321)     (152)
   Sale of other investments..........................          4,861     5,026
                                                              -------   -------
       Net cash used in investing activities..........        (71,785) (101,031)

Financing activities:
   Proceeds from the sale of long-term debt...........         47,909         -
   Redemption of long-term debt.......................        (65,063)  (51,800)
   Short-term borrowings - net........................        (63,395)   16,899
   Dividends on common stock..........................        (46,461)  (38,047)
   Dividends on preferred stock.......................              -    (2,929)
                                                              -------   -------
       Net cash used in financing activities..........       (127,010)  (75,877)
                                                             --------   -------
       Net increase in cash and temporary cash
         investments .................................         10,113       756
       Cash and temporary cash investments at beginning
         of period ...................................         19,926    18,909
                                                               ------    ------
       Cash and temporary cash investments at end 
         of period ...................................      $  30,039  $ 19,665
                                                            =========  ========


      The accompanying notes to consolidated condensed financial statements
               are an integral part of these financial statements.


                                       9
<PAGE>


                       SOUTHWESTERN PUBLIC SERVICE COMPANY
                            CONDENSED BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)

                                     ASSETS

                                                          March 31, December 31,
                                                           1999        1998 
                                                           ----        ---- 

Property, plant and equipment, at cost:
   Electric...........................................  $2,670,586   $2,665,115
   Construction in progress...........................     140,381      121,407
                                                           -------      -------
                                                         2,810,967    2,786,522
   Less: accumulated depreciation.....................   1,072,367    1,057,183
                                                         ---------   ----------

    Total property, plant and equipment...............   1,738,600    1,057,183
                                                         ---------    ---------


Investments, at cost:
   Notes receivable from affiliate....................     119,036      119,036
   Other..............................................       5,645        5,591
                                                           -------      -------
    Total investments.................................     124,681      124,627
                                                           -------      -------

Current assets:
   Cash and temporary cash investments................      17,064        1,350
   Accounts receivable, less reserve for uncollectible
    accounts ($1,382 at March 31, 1999; $1,695 at 
    December 31, 1998)................................      67,176       76,190
   Accrued unbilled revenues..........................      25,528        9,373
   Materials and supplies, at average cost............      17,247       16,970
   Fuel inventory, at average cost....................       2,294        2,293
   Current portion of accumulated deferred income taxes      9,390        6,113
   Prepaid expenses and other.........................       3,165        5,248
                                                           -------      -------
    Total current assets..............................     141,864      117,537
                                                           -------      -------

Deferred charges:
   Regulatory assets (Note 1).........................     113,420      111,971
   Unamortized debt expense...........................       9,282        8,767
   Other..............................................      41,364       37,623
                                                           -------      -------
    Total deferred charges............................     164,066      158,361
                                                           -------      -------
                                                        $2,169,211   $2,129,864
                                                        ==========   ==========
                                               



          The accompanying notes to condensed financial statements are
                 an integral part of these financial statements.

                                       10
<PAGE>


                       SOUTHWESTERN PUBLIC SERVICE COMPANY
                            CONDENSED BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)

                             CAPITAL AND LIABILITIES

                                                         March 31,  December 31,
                                                            1999         1998 
                                                            ----         ---- 


Common stock..........................................     $348,402   $348,402
Retained earnings.....................................      393,184    389,818
                                                            -------    -------
    Total common equity...............................      741,586    738,220

SPS obligated mandatorily redeemable preferred
  securities of subsidiary trust holding solely
  subordinated debentures of SPS (Note 7) ............      100,000    100,000
Long-term debt........................................      630,498    530,618
                                                            -------    -------
                                                          1,472,084  1,368,838
                                                          ---------  ---------

Noncurrent liabilities:
   Employees' postretirement benefits other than
     pensions ........................................        6,534      5,941
   Employees' postemployment benefits.................        3,354      3,571
                                                            -------    -------
    Total noncurrent liabilities......................        9,888      9,512
                                                            -------    -------

Current liabilities:
   Notes payable and commercial paper.................            -     85,162
   Note payable to affiliate..........................        9,000      9,000
   Long-term debt due within one year.................       90,113     90,113
   Accounts payable...................................       73,354     64,275
   Dividends payable..................................       20,025     20,007
   Recovered electric energy costs - net..............       26,284     18,760
   Customers' deposits................................        6,055      5,904
   Accrued taxes......................................       43,001     37,646
   Accrued interest...................................        8,969     12,273
   Other..............................................       19,480     18,011
                                                            -------    -------
    Total current liabilities.........................      296,281    361,151
                                                            -------    -------

Deferred credits:
   Unamortized investment tax credits.................        5,156      5,219
   Accumulated deferred income taxes..................      381,393    380,655
   Other..............................................        4,409      4,489
                                                            -------    -------
    Total deferred credits............................      390,958    390,363
                                                            -------    -------

Commitments and contingencies (Notes 4 and 5).........   ----------  ----------
                                                         $2,169,211  $2,129,864
                                                         ==========  ==========



          The accompanying notes to condensed financial statements are
                 an integral part of these financial statements.


                                       11
<PAGE>


                       SOUTHWESTERN PUBLIC SERVICE COMPANY
                         CONDENSED STATEMENTS OF INCOME
                                   (Unaudited)
                             (Thousands of Dollars)


                                                             Three Months Ended
                                                                  March 31,
                                                               1999      1998 
                                                               ----      ---- 

Operating revenues....................................       $202,552  $199,732

Operating expenses:
   Fuel used in generation............................         82,053    90,290
   Purchased power....................................          5,105     2,641
   Other operating & maintenance expenses.............         33,804    34,396
   Depreciation and amortization......................         18,472    17,776
   Taxes (other than income taxes)....................         13,384    12,065
   Income taxes.......................................         14,365    11,225
                                                              -------   -------
                                                              167,183   168,393
                                                              -------   -------
Operating income......................................         35,369    31,339

Other income and deductions - net.....................          2,080     1,075

Interest charges:
   Interest on long-term debt.........................         11,195    11,504
   Other interest.....................................          1,589     2,579
   Allowance for borrowed funds used during construction         (689)   (1,771)
   Dividends on SPS obligated mandatorily redeemable
     preferred securities of subsidiary trust holding
     solely subordinated debentures of SPS ...........          1,963     1,963
                                                                -----     -----
                                                               14,058    14,275
                                                               ------    ------

Net income............................................        $23,391   $18,139
                                                              =======   =======


          The accompanying notes to condensed financial statements are
                 an integral part of these financial statements.

                                       12
<PAGE>


                       SOUTHWESTERN PUBLIC SERVICE COMPANY
                       CONDENSED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
                             (Thousands of Dollars)


                                                             Three Months Ended
                                                                  March 31,
                                                               1999      1998 
                                                               ----      ---- 

Operating activities:
   Net income.........................................        $23,391   $18,139
   Adjustments to reconcile net income to net
    cash provided by operating activities:
     Depreciation and amortization....................         19,611    18,859
     Amortization of investment tax credits...........            (63)      (63)
     Deferred income taxes............................         (3,460)   (4,969)
     Allowance for funds used during construction.....           (173)        3
     Change in accounts receivable....................          9,014    16,008
     Change in inventories............................           (278)     (305)
     Change in other current assets...................        (14,072)    6,008
     Change in accounts payable.......................          9,079    (9,140)
     Change in other current liabilities..............         11,195    (1,359)
     Change in deferred amounts.......................         (4,853)   10,438
     Change in noncurrent liabilities.................            376      (279)
                                                              -------   -------
       Net cash provided by operating activities......         49,767    53,340

Investing activities:
   Construction expenditures..........................        (27,170)  (18,601)
   Allowance for equity funds used during construction            173        (3)
   Cost of disposition of property, plant and equipment        (1,029)   (1,013)
   Purchase of other investments......................            (54)      (62)
                                                              -------   -------
       Net cash used in investing activities..........        (28,080)  (19,679)

Financing activities:
   Proceeds from sale of long-term debt...............         99,196         -
   Short-term borrowings - net........................        (85,162)   (2,982)
   Dividends on common stock..........................        (20,007)  (22,546)
                                                              -------   -------
       Net cash used in financing activities..........         (5,973)  (25,528)
                                                              -------   -------
       Net increase in cash and temporary cash
         investments .................................         15,714     8,133
       Cash and temporary cash investments at 
         beginning of period .........................          1,350       986
                                                              -------    ------
       Cash and temporary cash investments at end
         of period                                          $  17,064   $ 9,119
                                                            =========   =======



            The accompanying notes to condensed financial statements
               are an integral part of these financial statements


                                       13
<PAGE>



                   NEW CENTURY ENERGIES, INC. AND SUBSIDIARIES

              NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS
                                   (Unaudited)


1.  Summary of Significant Accounting Policies (NCE, PSCo and SPS)

Business, Utility Operations and Regulation

      NCE is a registered  holding company under PUHCA and its domestic  utility
subsidiaries (PSCo, SPS and Cheyenne) are engaged principally in the generation,
purchase,  transmission,  distribution  and  sale  of  electricity  and  in  the
purchase, transportation, distribution and sale of natural gas. Both the Company
and its subsidiaries are subject to the regulatory  provisions of the PUHCA. The
utility  subsidiaries  are subject to  regulation  by the FERC and state utility
commissions  in  Colorado,  Texas,  New Mexico,  Wyoming,  Kansas and  Oklahoma.
Approximately  90% of the  Company's  revenues  are derived  from its  regulated
utility operations.

      Regulatory Assets and Liabilities

      The Company's regulated subsidiaries prepare their financial statements in
accordance  with the provisions of SFAS 71, as amended.  SFAS 71 recognizes that
accounting for rate regulated  enterprises  should reflect the  relationship  of
costs and revenues introduced by rate regulation.  A regulated utility may defer
recognition  of a cost (a  regulatory  asset)  or  recognize  an  obligation  (a
regulatory  liability) if it is probable that,  through the ratemaking  process,
there will be a  corresponding  increase or decrease  in  revenues.  The Company
believes  its  utility   subsidiaries  will  continue  to  be  subject  to  rate
regulation.  In the event that a portion  of a  subsidiaries'  operations  is no
longer  subject  to the  provisions  of SFAS  71,  as a result  of a  change  in
regulation or the effects of competition,  the Company's  subsidiaries  could be
required to write-off their regulatory assets, determine any impairment to other
assets  resulting from  deregulation and write-down any impaired assets to their
estimated  fair  value,  which  could have a material  adverse  effect on NCE's,
PSCo's and SPS's financial position, results of operations or cash flows.

      The   following   regulatory   assets  are   reflected  in  the  Company's
consolidated balance sheets (in thousands):

March 31, 1999                              NCE           PSCo            SPS 
                                          ------         ------         ------

Income taxes........................      $147,554       $68,011        $80,037
Nuclear decommissioning costs.......        67,215        67,215              -
Employees' postretirement benefits
  other than pensions...............        56,343        53,488          2,855
Employees' postemployment benefits
  (Note 4) .........................        24,768        24,320              -
Demand-side management costs........        35,622        30,742          4,880
Unamortized debt reacquisition costs        32,718        15,739         16,424
Other...............................        11,256         2,032          9,224
                                            ------        ------         ------
  Total.............................      $375,476      $261,547       $113,420
                                          ========      ========       ========



                                       14
<PAGE>


             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)


December 31, 1998                           NCE           PSCo            SPS 
                                          ------         ------         ------

Income taxes........................      $148,499       $69,868        $79,116
Nuclear decommissioning costs.......        69,490        69,490              -
Employees' postretirement benefits
  other than pensions...............        57,350        54,461          2,889
Employees' postemployment benefits
  (Note 4) .........................        24,888        24,416              -
Demand-side management costs........        37,160        31,984          5,176
Unamortized debt reacquisition costs        33,138        15,769         16,808
Other...............................        11,107         3,124          7,982
                                            ------        ------         ------
  Total.............................      $381,632      $269,112       $111,971
                                          ========      ========       ========

     The  regulatory  assets of the Company's  regulated  subsidiaries  that are
currently  being  recovered  as of March  31,  1999 and  December  31,  1998 are
reflected in rates charged to customers over periods  ranging from two to thirty
years.  The recovery of regulatory  assets over the next five years is estimated
to  exceed  $200  million.  Refer  to  the  discussion  below  or the  Notes  to
Consolidated  Financial  Statements included herein and in the NCE, PSCo and SPS
Annual Report on Form 10-K for a more  detailed  discussion  regarding  recovery
periods.

     On January  27,  1997,  the CPUC  issued its order on PSCo's  1996 gas rate
case. The CPUC allowed  recovery of  postemployment  benefit costs on an accrual
basis under SFAS 112 and denied  amortization of the approximately  $8.9 million
regulatory  asset recognized upon the adoption of SFAS 112. PSCo has appealed in
the Denver District Court the decision related to this issue. PSCo believes that
it will be  successful  on appeal and that the  associated  regulatory  asset is
realizable.  On April  1,  1998,  in  connection  with  PSCo's  annual  electric
department earnings test filing, PSCo requested approval to recover its electric
jurisdictional  portion of the  postemployment  benefits cost  regulatory  asset
totaling  approximately $15 million over three years. In December 1998, the CPUC
approved  a  settlement  agreement  on this  matter  which  deferred  the  final
determination of the regulatory  treatment of these costs pending the outcome of
the current  appeal of the decision on PSCo's gas rate case.  PSCo believes that
it will be allowed  recovery of SFAS 112 costs on an accrual  basis.  If PSCo is
ultimately  unsuccessful  in its appeal of the gas rate case decision  and/or in
its  request  to recover  its  electric  jurisdictional  regulatory  asset,  all
unrecoverable amounts will be written off (see Note 4. Regulatory Matters).

      Other Property

      Property,  plant and equipment  includes  approximately  $18.4 million and
$25.4 million, respectively, for costs associated with the engineering design of
the future  Pawnee 2  generating  station and certain  water  rights  located in
southeastern  Colorado,  also obtained for a future generating station.  PSCo is
earning a return on these investments based on its weighted average cost of debt
in accordance with a CPUC rate order.

Non-utility Subsidiaries and International Investments

      The  Company's  non-utility   subsidiaries  are  principally  involved  in
energy-related  businesses  including  the  following:  engineering,  design and
construction management,  non-regulated energy services, including gas and power
marketing,  the management of real estate and certain life  insurance  policies,
the financing of certain  current assets of PSCo and investments in cogeneration
facilities,  electric  wholesale  generators and a foreign utility company.  The
Company's  international  investments are subject to regulation in the countries
in which such investments are made (see Note 3. Investment in Yorkshire  Power).
Financial statements of foreign subsidiaries are translated into U.S. dollars at
current rates, except for revenues,  costs and expenses, which are translated at
average current rates during each reporting period.


                                       15
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

Consolidation and Financial Statement Presentation

      The Company  follows the  practice of  consolidating  the  accounts of its
majority owned and controlled  subsidiaries.  The Company  recognizes  equity in
income from its unconsolidated investments accounted for under the equity method
of accounting. All intercompany items and transactions have been eliminated.

Comprehensive Income

      The Company and its subsidiaries adopted Statement of Financial Accounting
Standards No. 130, "Reporting  Comprehensive Income," effective January 1, 1998.
This  statement   establishes   standards  for  the  reporting  and  display  of
comprehensive  income  (net  income  plus all other  changes in net assets  from
non-owner   sources)  and  its   components  in  financial   statements.   Other
comprehensive  income for NCE was  reported in the  consolidated  Statements  of
Shareholders'  Equity for the three  months  ending March 31, 1999 and March 31,
1998 and consists of foreign  currency  translation  adjustments  related to the
investment in Yorkshire Power.

      For the three  months  ending  March 31,  1999,  PSCo and SPS had no other
comprehensive income items,  therefore,  comprehensive income equals net income.
For the three months ended March 31, 1998, SPS had no other comprehensive income
items,  therefore,  comprehensive  income  equals net  income.  During that same
period,  PSCo had other  comprehensive loss of $4.1 million,  which consisted of
foreign currency translation  adjustments related to the investment in Yorkshire
Power.  On March 31, 1998,  PSCo sold NCI (which  includes  Yorkshire  Power and
related foreign currency translation adjustments) to NC Enterprises.  The amount
of the sale  included  other  comprehensive  income of $5.3 million at March 31,
1998.  As a result of this sale,  PSCo had no  Accumulated  Other  Comprehensive
Income at March 31, 1998.

Basic and Diluted Earnings Per Share

      Basic earnings per share is based upon the weighted  average common shares
outstanding  during the year.  Diluted earnings per share reflects the potential
dilution  that could occur if  securities  or other  agreements  to issue common
stock were exercised or converted into common stock.  Diluted earnings per share
is  based  upon  the  weighted  average  common  and  common  equivalent  shares
outstanding  during each year.  Employee  stock options are the  Company's  only
common stock equivalents. There are no other potentially dilutive securities.

      During the first  quarter of 1999 and 1998,  the Company had 62,000 shares
and 161,000 shares,  respectively,  of potentially  dilutive  securities.  These
shares had no impact on the Company's reported earnings per share information.

     Approximately  1,098,000  common  shares are  issuable  under stock  option
grants as of March 31, 1999, but were not included in the computation of diluted
earnings per share  because the options'  exercise  prices were greater than the
average market price of the common stock.

Statements of Cash Flows - Non-cash Transactions:

      Shares of common  stock  (200,880 in 1999 and 222,362 in 1998),  valued at
the market  price on date of  issuance  (approximately  $10  million in 1999 and
1998),  were issued to a savings plan of the  Company.  The  estimated  issuance
values  were  recognized  in other  operating  expenses  during  the  respective
preceding years. The stock issuances were non-cash financing  activities and are
not reflected in the consolidated condensed statements of cash flows.

      Effective March 31, 1998, PSCo sold its common stock  investment in NCI to
NC  Enterprises,  an NCE  subsidiary.  PSCo received as  consideration a 20-year
promissory  note  from NC  Enterprises  in the  amount of  


                                       16
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

approximately  $292.6  million (see Note 3.  Investment  in Yorkshire  Power) of
which $192.6 million remains outstanding at March 31, 1999.

General

     See Note 1. of the Notes to Consolidated  Financial  Statements in the NCE,
PSCo and SPS 1998 Annual  Report on Form 10-K for a summary of the companies and
their subsidiaries significant accounting policies.

2. Proposed Merger with Northern States Power Company (NCE, PSCo and SPS)

     On March 24, 1999,  NCE and  Northern  States  Power  Company,  a Minnesota
corporation ("NSP"),  entered into an Agreement and Plan of Merger (the "NCE/NSP
Merger  Agreement")  providing for a strategic  business  combination of NCE and
NSP. Pursuant to the NCE/NSP Merger Agreement,  NCE will be merged with and into
NSP with NSP as the surviving  corporation in the merger (the "NCE/NSP  Merger")
and a holding company for the combined assets and operations.  Just before or at
the time the NCE/NSP Merger is complete,  NSP will contribute all of its assets,
other than shares that it owns in  subsidiaries,  to a newly formed wholly owned
subsidiary.  At the same  time,  the new  subsidiary  will  assume  all of NSP's
liabilities associated with the assets that it receives in the contribution.  If
difficulties  arise in obtaining the approvals and consents required to transfer
NSP's utility  assets to a new utility  subsidiary,  NCE and NSP may negotiate a
mutually acceptable alternative.

     Subject to the terms of the NCE/NSP  Merger  Agreement,  at the time of the
NCE/NSP Merger,  each share of NCE common stock, par value $1.00 per share ("NCE
Common  Stock")  (other than certain  shares to be canceled),  together with any
associated  purchase  rights,  will be converted  into the right to receive 1.55
shares of NSP common stock, par value $2.50 per share ("NSP Common Stock"). Cash
will be paid in lieu of any fractional  shares of NSP Common Stock which holders
of NCE Common Stock would otherwise  receive.  Based on outstanding common stock
of NCE and NSP at March 31, 1999,  the NCE/NSP Merger would result in the common
shareholders of NCE owning 54% of the common equity of the combined  company and
the common  shareholders  of NSP owning 46% of the common equity of the combined
company.  The  NCE/NSP  Merger  is  expected  to be a  tax-free  stock-for-stock
exchange  for  shareholders  of  both  companies  and to be  accounted  for as a
pooling-of-interests.

      It is anticipated  that the combined  company will initially adopt the NCE
dividend  payment  level,  adjusted for the exchange  ratio,  resulting in a pro
forma  dividend of $1.50 per share on an annual basis,  following  completion of
the  NCE/NSP  Merger.  The  actual  dividend  level will be  dependent  upon the
combined  company's results of operations,  financial  position,  cash flows and
other  factors,  and will be evaluated by the Board of Directors of the combined
company.

     Based on reported  1998 results,  the combined  company would have revenues
approximately  of $6.7 billion  (including  earnings from equity  investments of
$116  million),  earnings of  approximately  $619  million  and assets  totaling
approximately  $15.1  billion.  NCE and NSP estimate  regulated  cost savings of
approximately  $1.1  billion,  net of  merger  costs and  costs to  achieve  the
savings, in the first 10 years after the transaction is completed.  Nonrecurring
costs directly attributable to the NCE/NSP Merger will be deferred and amortized
to expense in periods  subsequent to the  consummation of the merger  consistent
with the anticipated recovery in rates.

      Consummation   of  the  NCE/NSP  Merger  is  subject  to  certain  closing
conditions,  including,  among others,  approval by the  shareholders of NCE and
NSP, approval or regulatory review by certain state utility regulators,  the SEC
under the PUHCA,  the FERC,  the  Nuclear  Regulatory  Commission,  the  Federal
Communications  Commission  and  expiration or termination of the waiting period
applicable  to  the  NCE/NSP  Merger  under  the   Hart-Scott-Rodino   Antitrust
Improvements  Act of 1976,  as amended.  NCE and NSP have each

                                       17
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

agreed to certain  undertakings  and limitations  regarding the conduct of their
respective  businesses  prior to the  closing of the  transaction.  The  NCE/NSP
Merger is expected to take from 12 to 18 months to complete.

     NCE expects to hold a special  shareholders'  meeting during late June 1999
to vote on the NCE/NSP Merger.  All  shareholders  will receive a detailed proxy
statement  prior to the  meeting,  which will explain in detail the terms of the
NCE/NSP Merger,  membership on the Board of Directors,  employment  arrangements
and other matters related to the NCE/NSP Merger.

3. Investment in Yorkshire Power (NCE and PSCo)

Merger Rate Filings

      Yorkshire  Power is a joint  venture  initially  equally owned by PSCo and
AEP,  which  acquired  indirectly  all of the  outstanding  ordinary  shares  of
Yorkshire  Electricity,  an U.K. regional  electricity company. NCI accounts for
its  investment  in Yorkshire  Power using the equity method and NCI's equity in
earnings of Yorkshire Power is 50%, the same as its ownership share.

      Effective March 31, 1998, PSCo sold its common stock  investment in NCI to
NC Enterprises, an NCE subsidiary.  NCI's primary investment is Yorkshire Power.
PSCo received as consideration a 20-year  promissory note from NC Enterprises in
the amount of approximately  $292.6 million of which $192.6 remains  outstanding
at March 31,  1999.  Annual  interest  payments are required for the first three
years  followed by principal and interest  payments for the remaining  seventeen
years.  The interest rate on the note is 7.02%.  NCE intends to make  additional
capital  contributions  to NC  Enterprises  to provide the  necessary  cash flow
requirements  to make payments on the promissory  note to PSCo. In October 1998,
NCE  contributed  $100 million to NC  Enterprises,  which was used to reduce the
principle balance of the promissory note to PSCo.

      Summarized  income statement  information for the three months ended March
31, 1999 and 1998, respectively is presented below (in millions):

                                                    1999      1998 
                                                            (NCE and
                                                    (NCE)     PSCo)
                                                    -----     -----

    Yorkshire Power:
      Operating revenues.......................    $  652.0 $  663.2
                                                   -------- --------

      Operating income.........................       113.5     89.7
                                                   -------- --------

      Net income...............................    $   34.6 $    6.9
                                                   ======== ========

    NCI's equity in earnings of Yorkshire Power    $   17.3 $    3.4
                                                   ======== ========

      NCI's equity in earnings of  Yorkshire  Power  increased by  approximately
$13.9  million for the three months ended March 31, 1999,  when  compared to the
same period in 1998,  primarily due an increase in gas supply business  margins.
In  addition  during  1998,  Yorkshire  Power  recognized  a penalty,  which was
applicable to all United Kingdom  regional  electricity  utilities,  designed to
recognize  the  effects  of the  delay  in  implementation  of full  competition
(Yorkshire Power's portion was $8.3 million).

      The unaudited pro forma financial information,  for the three months ended
March  31,  1998,  presented  below  for  PSCo  assumes  that NCI was sold to NC
Enterprises  effective January 1, 1998. The pro forma adjustments  represent the
removal of NCI's net income from PSCo and the inclusion of interest income,  net
of tax, from the  promissory  note to PSCo from NC  Enterprises.  Based upon the
above assumptions,  shown below is unaudited pro forma financial information for
the three months ended March 31, 1998 (in millions):

                                       18
<PAGE>



                                                          PSCo Earnings
                                                              1998
                                                              ----

Net income...............................................     $ 68.9

Pro forma adjustments:

  NCI's net income.......................................      (2.8)
  Interest income from promissory note, net of tax.......       3.3
                                                              -----

Pro forma result.........................................     $ 69.4
                                                              ======

4. Regulatory Matters (NCE, PSCo and SPS)

Electric Utility Matters

PSCo Performance Based Regulatory Plan

      PSCo's  base  electric  rates are  based on  traditional  cost of  service
ratemaking principles.  The CPUC established a performance based regulatory plan
in connection with the CPUC's decision to approve the PSCo/SPS Merger. The major
components of this regulatory plan include the following:

 -    an annual electric  department  earnings test with the sharing of earnings
      in excess of an 11% return on equity for the calendar years 1997-2001;
 -    a Quality of Service Plan ("QSP")  designed with  performance  measures to
      effectively  penalize  or reward  PSCo  based on the  quality  of  service
      provided to retail customers.  The reward structure was eliminated for the
      years 1999-2001; and
 -    an Incentive  Cost  Adjustment  ("ICA") which  provides for the sharing of
      energy costs and savings relative to an annual target cost/delivered Kwh.

      PSCo has filed with the CPUC its  proposed  Performance  Based  Regulatory
Plan adjustment for calendar year 1998.  This adjustment  provides the means for
implementing the sharing  mechanism for the customers'  portion of earnings over
PSCo's authorized  return on equity  threshold.  PSCo recorded a customer refund
obligation of $15.1  million for the 1997 earnings test and an estimated  refund
obligation  of $8 million for the 1998 earnings  test. In July 1998,  PSCo began
refunding  the 1997 earnings  test refund  obligation to customers  through bill
credits.

      Additionally, PSCo agreed to freeze base electric rates after the PSCo/SPS
Merger  rate  reductions  for the  period  through  December  31,  2001 with the
flexibility to make certain other rate changes,  including  those  necessary for
the recovery of DSM, QF capacity costs and decommissioning  costs. The freeze in
base  electric  rates does not prohibit  PSCo from filing a general rate case or
deny any party the opportunity to initiate a complaint or show cause proceeding.

PSCo Wholesale - FERC

      On March 30, 1999, PSCo received  authorization from the FERC to engage in
market-based wholesale power sales. The authorization allows PSCo to sell energy
to e prime, subject to certain conditions, as well as third parties.

SPS Merger Related Rate Reductions

      Under the  various  regulatory  commission  approvals,  SPS is required to
provide  credits to  customers  over five  years for  one-half  of the  measured
non-fuel operation and maintenance  expense savings associated with the PSCo/SPS

                                       19
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

Merger.  SPS will provide  guaranteed minimum annual credits to retail customers
of $3 million in Texas,  $100,000  in  Oklahoma  and  $10,000 in Kansas and $1.5
million to wholesale customers.

      Under a settlement  reached with the NMPRC,  effective  December 30, 1998,
SPS  discontinued  the merger  savings  credit of $1.2 million per year with the
implementation of new retail rates in New Mexico as discussed below.

SPS Electric Cost Adjustment Mechanisms

      Substantially  all fuel and  purchased  power costs are  recoverable  from
utility customers,  as determined on a jurisdictional basis, using approved cost
adjustment  mechanisms.  As a result  of  amendments  during  1998 to  contracts
between the coal  supplier  to SPS and the  railroad  company it  employs,  coal
transportation costs are projected to decline  significantly for the period from
November  1998  through  December  2002.  These  savings  will be  passed  on to
customers.

Texas

     The  PUCT's  regulations  require  periodic  examination  of SPS's fuel and
purchased  power costs,  the  efficiency  of the use of such fuel and  purchased
power, fuel acquisition and management  policies and purchase power commitments.
SPS is required to file an  application  for the  Commission to  retrospectively
review,  at least every three years,  the operations of a utility's  electricity
generation  and  fuel  management  activities.  In  June  1998,  SPS  filed  its
reconciliation  for the  generation  and  fuel  management  activities  totaling
approximately  $690 million,  for the period from January 1995 through  December
1997.   For  this  same  period,   SPS  had   approximately   $21.4  million  in
underrecovered fuel costs associated with the Texas retail jurisdiction. SPS has
also requested the prospective sharing of margins from wholesale non-firm sales.
Intervening  parties are contesting a portion of the recovery of fuel costs,  to
which SPS is  providing  rebuttal  testimony.  SPS has entered into a settlement
agreement with the General Counsel at the PUCT, which if approved, would provide
for  the  recovery  of  these  fuel  costs.  The  final  outcome  of  this  fuel
reconciliation proceeding is pending.

      SPS was named as a defendant in a case entitled Thunder Basin Coal Co. vs.
Southwestern Public Service Co. In November 1994, the jury returned a verdict in
favor of Thunder Basin and awarded damages of approximately  $18.8 million.  SPS
appealed the judgment and, in January 1997, that Court found in favor of Thunder
Basin and upheld the judgment.  In February 1997, SPS recorded the liability for
the judgment  including  interest and court costs.  The amount of  approximately
$22.3 million was paid in April 1997.

      During  1996 and  1997,  SPS  obtained  conditional  approval  to  collect
portions of the Thunder Basin  judgment from  wholesale  customers from the FERC
and the  NMPRC  issued  an order  granting  recovery  of the New  Mexico  retail
jurisdictional  portion of the judgment.  In May 1997,  SPS filed a request with
the PUCT to surcharge  undercollected  fuel and purchased power expenses,  which
included $9.1 million of the Thunder Basin judgment.  The PUCT issued a decision
which denied  recovery of the  judgment  through a surcharge on the grounds that
the costs were not classified as fuel costs. In 1997, SPS expensed approximately
$12.1  million of the Texas retail  jurisdictional  portion of the Thunder Basin
judgment and recognized an equal amount as deferred  revenue in  anticipation of
future recovery through the pending fuel reconciliation proceeding.

     SPS believes  that recovery of the Thunder Basin costs for the Texas retail
jurisdiction  will be approved in the pending  fuel  reconciliation  proceeding.
Under the PUCT  regulations,  a utility may recover  eligible  fuel  expenses or
fuel-related  expenses,  which result in benefits to  customers  that exceed the
costs that  customers  would  otherwise  have to pay.  The  Thunder  Basin costs
resulted in total net savings to customers of approximately  $8.5 million,  with
approximately   $4.6   million  net  savings   attributable   to  Texas   retail
jurisdictional   customers.   In  the  settlement  agreement  with  the  General
Coounsel's  office at the PUCT,  the  General  Counsel  has  agreed  with  SPS's
proposed recovery of the Thunder Basin costs.


                                       20
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

     The PUCT  authorized  SPS to reduce its fixed fuel  factor for SPS's  Texas
retail jurisdiction, effective in April 1999, by approximately $44 million on an
annual basis.  The PUCT also  authorized  SPS to refund its over  collected fuel
costs for the period  January 1998 through  January 1999.  This  one-time  $16.5
million fuel refund, including interest, will be applied to the monthly billings
during April 1999. This rate reduction and fuel cost refund are primarily due to
lower coal  transportation  costs  between  SPS's coal supplier and the railroad
company which began in late 1998.

New Mexico

      In October  1997,  the NMPRC  approved  a fixed fuel  factor for SPS's New
Mexico retail  jurisdiction,  effective January 1998. This employs an over/under
fuel collection calculation made on a monthly basis. SPS is required to petition
for a change in the fixed fuel factor if the over/under recovery balance exceeds
$5 million.  In addition,  on an annual basis, SPS files with the NMPRC a report
of SPS's fuel and purchase power costs,  which  includes the current  over/under
recovery  balance and proposed  rate changes to refund or surcharge the balance.
The methodology of the over/under calculation,  plus interest, is similar to the
Texas  fixed  fuel  factor   calculation.   Previously,   New  Mexico's   retail
jurisdictional  electric  rates applied a monthly fuel factor.  In January 1999,
SPS  implemented  new annual fixed fuel cost  recovery  factors to reflect lower
fuel costs primarily as a result of the aforementioned  coal transportation cost
settlement between SPS's coal supplier and the railroad company.

SPS Rate Cases

New Mexico

      In November 1997, the NMPRC issued an order  investigating SPS's rates. In
the order, the NMPRC  determined that because of the rapid changes  occurring in
the  electric  industry  the NMPRC would  require rate case filings by the major
electricity  suppliers who have not adopted a plan to provide retail open access
and customer  choice of  suppliers.  SPS made a  compliance  filing in May 1998,
which proposed a $1.7 million annual rate reduction for certain retail customers
in New  Mexico and  incorporated  the $1.2  million  guaranteed  minimum  annual
credits,  discussed  above.  In October  1998,  SPS entered into an  uncontested
stipulation  agreement  settling the rate  investigation  case.  As part of this
settlement,  SPS  instituted  a  $6  million  annual  reduction  in  base  rates
(discontinuing  the $1.2  million in  guaranteed  minimum  annual  credits)  for
certain retail customers.  Additionally,  SPS implemented full  normalization in
its accounting  for income taxes with recovery of the New Mexico  jurisdictional
portion of the tax regulatory  asset over 16.8 years.  On November 30, 1998, the
NMPRC approved the stipulation and the rate reduction became effective  December
30, 1998.

Wholesale - FERC

      In 1989,  the FERC issued its final order  regarding a 1985 wholesale rate
case. SPS appealed certain portions of that order that related to recognition of
rates of the  reduction  of the  federal  income tax rates from 46% to 34%.  The
United  States  Court  of  Appeals  remanded  the  case,  directing  the FERC to
reconsider  SPS's claim.  Negotiated  settlements  with certain  customers  were
reached,  and  approved  by the  FERC,  in 1993 and  1995,  with  SPS  receiving
approximately  $10  million,  including  interest.  Settlement  agreements  were
reached with the two remaining  customers  during 1998 and approved by the FERC.
In  connection  with these  settlements  during  1998,  subsequent  to the first
quarter of 1998,  SPS recorded  $16.9  million of  additional  revenues and $7.6
million of additional depreciation expense.

Deregulation Legislation

      On April 8, 1999,  New Mexico enacted the Electric  Utility  Restructuring
Act of 1999 which allows customer choice for  residential,  small commercial and
educational customers beginning January 1, 2001. All remaining customers will be
allowed  customer  choice on January  1,  2002.  The  legislation  provides  for
recovery  of no  less  than  50% of  stranded  costs  quantified  by the  NMPRC.
Transition costs must be approved by the NMPRC prior to being recovered

                                       21
<PAGE>

through a non-by-passable  wires charge,  which must be included in a transition
plan filing. All public electric  utilities  operating in New Mexico must file a
transition plan with the NMPRC by March 1, 2000.

     Several  electric  restructuring  measures have been introduced  during the
current Texas legislative session.  Substantial negotiation has been required to
develop  a bill  which  meets  the  diverse  needs  of the  state.  An  electric
restructuring  bill has not yet been  passed  by both the  Senate  and the House
during this legislative session,  which is scheduled to continue through early
June 1999. The changes  resulting from this legislative  session,  if any, can
not be determined at this time.

Gas Utility Matters

PSCo Rate Cases

      On June 5, 1996, PSCo filed a retail rate case with the CPUC requesting an
annual  increase  in  its  jurisdictional  gas  department   revenues  equal  to
approximately $34 million.  In early 1997, the CPUC approved an overall increase
of approximately $18 million with an 11.25% return on equity, effective February
1, 1997 and as modified on May 15,  1997.  The CPUC  disallowed  the recovery of
certain  postemployment  benefit  costs under SFAS 112 and  imputed  anticipated
merger  related  savings net of costs  related to the gas business  (see Note 1.
Summary of  Significant  Accounting  Policies).  PSCo filed a petition  with the
Denver District Court appealing the CPUC's decision. PSCo anticipates a decision
during 1999.

      In  November  1998,  PSCo  filed a  retail  gas  rate  case  with the CPUC
requesting  an annual  increase in rates of  approximately  $23.4  million.  The
request for a rate increase reflects revenues for additional plant investment, a
12.0% return on equity and the recovery of incremental year 2000 costs (see Note
5. Commitments and  Contingencies - Year 2000 Costs).  Hearings were held during
April 1999.  Intervening  parties proposed an annual  reduction in rates,  which
PSCo is contesting. New rates, if approved, would become effective July 1, 1999.

PSCo Unbundling and Deregulation of the Retail Natural Gas Supply Business

      On April 26, 1999, the Colorado  legislature  approved a bill,  which will
allow natural gas public  utilities to  voluntarily  submit plans to the CPUC to
open their  markets and enable  customers to choose their  natural gas supplier.
Currently,  PSCo provides a traditional  bundled gas service with rates designed
for the  recovery  of  actual  gas  costs  through  the  GCA  and for  providing
transportation and delivery services.  Delivery of natural gas would continue to
be  regulated,  with  delivery  companies  required  to offer  nondiscriminatory
pipeline  access to  competitors.  The bill must be approved by the  governor by
June 4, 1999, in order for it to be enacted.  PSCo is currently  evaluating this
legislation.

5. Commitments and Contingencies (NCE, PSCo and SPS)

Environmental Issues

      The Company  and its  subsidiaries  are  subject to various  environmental
laws, including  regulations governing air and water quality and the storage and
disposal of hazardous or toxic wastes. The Company and its subsidiaries  assess,
on an ongoing basis,  measures to ensure  compliance  with laws and  regulations
related  to air and water  quality,  hazardous  materials  and  hazardous  waste
compliance and remediation activities.

Environmental Site Cleanup

      As  described  below,  PSCo has  been or is  currently  involved  with the
cleanup of contamination from certain hazardous substances.  In many situations,
PSCo is  pursuing  or intends to pursue  insurance  claims and  believes it will
recover some portion of these costs  through  such claims.  Additionally,  where
applicable, PSCo is pursuing, or intends

                                       22
<PAGE>

to pursue,  recovery from other PRPs and through the rate regulatory process. To
the extent any costs are not recovered  through the options  listed above,  PSCo
would be required to recognize an expense for such unrecoverable amounts.

      Under the CERCLA,  the U.S. EPA identified,  and a Phase II  environmental
assessment  revealed,  low  level,   widespread   contamination  from  hazardous
substances at the Barter Metals Company ("Barter") properties located in central
Denver.  For an  estimated  30 years,  PSCo  sold  scrap  metal  and  electrical
equipment to Barter for  reprocessing.  PSCo has  completed  the cleanup of this
site at a cost of approximately  $9 million and has received  responses from the
Colorado Department of Public Health and Environment  ("CDPHE")  indicating that
no further action is required  related to these  properties.  In January 1996, a
lawsuit by PSCo  against its  insurance  providers,  the Denver  District  Court
entered  final  judgment  in favor of PSCo in the  amount  of $5.6  million  for
certain  cleanup  costs at Barter.  Several  appeals and cross appeals have been
filed  by one of the  insurance  providers  and  PSCo in the  Colorado  Court of
Appeals.  The insurance  provider has posted  supersedeas bonds in the amount of
$9.7 million ($7.7 million  attributable to the Barter judgment).  In July 1997,
the Colorado Court of Appeals  overturned  the  previously  awarded $7.7 million
judgment  on the basis  that the jury had not been  properly  instructed  by the
Judge  regarding a narrow issue  associated with certain  policies.  Previously,
PSCo had received  certain  insurance  settlement  proceeds from other insurance
providers for Barter and other  contaminated  sites and a portion of those funds
remains  to be  allocated  to this site by the trial  court.  Both  sides of the
litigation filed petitions for certiorari to the Colorado  Supreme Court,  which
granted a hearing on several  issues,  although the matter is still pending.  In
addition,  in August  1996,  PSCo  filed a  lawsuit  against  four PRPs  seeking
recovery of certain Barter related costs.  Settlement has been achieved with two
smaller  PRPs.  In December  1997,  the U. S.  District  Court  awarded  summary
judgment in favor of the remaining PRPs, on the basis that PSCo failed to follow
CERCLA  guidelines in the cleanup.  In January  1998,  PSCo appealed the summary
judgment to the U.S. Court of Appeals,  which is still  pending.  In March 1998,
PSCo sold the  remaining  Barter  properties,  and the total  proceeds were $1.1
million.

      PCB presence was identified in the basement of an historic office building
located in downtown Denver.  The Company was negotiating the future cleanup with
the current  owners;  however,  in October 1993, the owners filed a civil action
against  PSCo in the Denver  District  Court.  The action  alleged that PSCo was
responsible  for the PCB  releases and  additionally  claimed  other  damages in
unspecified  amounts.  In August  1994,  the  Denver  District  Court  entered a
judgment  approving a $5.3  million  offer of  settlement  between  PSCo and the
building owners  resolving all claims.  In December 1995, PSCo filed  complaints
against all applicable  insurance carriers in the Denver District Court. In June
1997,  the Court  ruled in favor of the  carriers  on summary  judgment  motions
addressing late notice and other issues. In August 1997, PSCo filed an appeal of
the  decision  with the  Colorado  Court of Appeals.  In March  1999,  the Court
affirmed the trial court's decision.  A petition for rehearing was denied.  PSCo
may file a petition for certiorari to the Colorado  Supreme  Court.  One carrier
was excluded  from the summary  judgment;  subsequently,  that carrier  received
approval to be dismissed on the same basis as the other carriers. In March 1998,
PSCo  reached a settlement  with another  carrier who was not part of the Denver
District  Court action.  In December  1998,  the CPUC  approved  recovery of the
electric  jurisdictional  net costs totaling  approximately $3.1 million through
PSCo's electric department earnings test over a five-year amortization period.

      In addition to these sites, PSCo has identified  several other sites where
clean up of hazardous substances may be required.  While potential liability and
settlement costs are still under  investigation  and negotiation,  PSCo believes
that the resolution of these matters will not have a material  adverse effect on
PSCo's financial position, results of operations or cash flows. PSCo will pursue
the  recovery  of all  significant  costs  incurred  for such  projects  through
insurance claims and/or the rate regulatory process.

Other Environmental Matters

      Under the Clean Air Act  Amendments of 1990  ("CAAA"),  coal-fueled  power
plants are required to reduce SO2 and NOx emissions to specified  levels through
a phased  approach.  PSCo and SPS's  facilities  must  comply  with the Phase II
requirements,  which  will be  effective  in the  year  2000.  Currently,  these
regulations  permit  compliance  with SO2  emission  limitations  by  using  SO2
allowances  allocated  to  plants  by the EPA,  using  allowances  generated  by
reducing  emissions at existing  plants and by using  allowances  purchased from
other  companies.  The Company  expects

                                       23
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

to meet the Phase II emission  standards  placed on SO2 through the  combination
of: a) the use of low sulfur  coal,  b) the  operation  of air  quality  control
equipment on certain generation facilities,  and c) allowances issued by the EPA
and purchased from other companies. In addition, PSCo will be required to modify
certain  boilers by the year 2000  toreduce the NOx emissions in order to comply
with Phase II requirements.  The estimated Phase II costs for these future plant
modifications  to meet NOx  requirements  total  approximately  $2.5 million and
pertain to PSCo's Cherokee Unit 1 and 2 and Arapahoe Unit 3.

      PSCo has announced its  intention to spend  approximately  $211 million on
its Denver and Boulder  Metro area  coal-fueled  power plants to further  reduce
such emissions below the required  regulatory  levels  discussed above, but will
only do so if the following  three  conditions are met: 1) the Colorado  General
Assembly  and the  CPUC  approve  recovery  of  these  costs,  2)  PSCo  obtains
flexibility  in  operating  the  plants,  and 3) PSCo is  assured  the  emission
reduction  plan is  sufficient to meet future state  requirements  for 15 years.
Legislation  was passed and signed  into law during the second  quarter of 1998.
During the third  quarter of 1998,  PSCo and the CDPHE  entered into a voluntary
emissions  reduction  agreement  under the  legislation.  In November 1998, PSCo
filed for  recovery  of these  costs  with the  CPUC.  The  voluntary  emissions
reduction  agreement will be effective only if the CPUC approves a cost recovery
mechanism  acceptable  to PSCo.  The CPUC has set this matter for hearing on May
17, 1999.

Hayden Steam Electric Generating Station

      In May 1996,  PSCo and the other joint owners of Hayden Station reached an
agreement  resolving  violations  alleged in complaints  filed by a conservation
organization,  the  CDPHE and the EPA  against  the  joint  owners.  PSCo is the
operator  and owns an average  undivided  interest of  approximately  53% of the
station's two generating  units. In connection  with the  settlement,  the joint
owners of the Hayden station were required to install emission control equipment
of approximately $130 million (PSCo's portion is approximately $70 million). The
settlement  included  stipulated future penalties for failure to comply with the
terms  of the  agreement,  including  specific  provisions  related  to  meeting
construction  deadlines  associated with the installation of additional emission
control  equipment  and  complying  with  particulate,  SO2  and  NOx  emissions
limitations.  In  August  1996,  the U.S.  District  Court for the  District  of
Colorado  entered the  settlement  agreement,  which  effectively  resolved this
litigation. Installation of this emission control equipment is in process and on
schedule in accordance with the settlement agreement. The joint owners completed
installation  and began operating the emission  control  equipment  required for
Unit 1 on time in accordance  with the  settlement  agreement in late 1998.  The
joint owners began the tie-in of the Unit 2 control equipment in March 1999.

Craig Steam Electric Generating Station

      In October 1996, a conservation  organization  filed a complaint in the U.
S.  District  Court  pursuant to  provisions  of the Federal  Clean Air Act (the
"Act") against the joint owners of the Craig Steam Electric  Generating  Station
located in western Colorado.  Tri-State Generation and Transmission Association,
Inc. is the operator of the Craig  station and PSCo owns an  undivided  interest
(acquired  in  April  1992)  in  each  of  two  units  at the  station  totaling
approximately  9.7%. The plaintiff alleged that: 1) the station exceeded the 20%
opacity  limitations in excess of 14,000 six minute  intervals during the period
extending from the first quarter of 1991 through the second quarter of 1996, and
2) the owners failed to operate the station in a manner consistent with good air
pollution  control  practices.  The complaint seeks,  among other things,  civil
monetary  penalties and injunctive  relief. The Act provides for penalties of up
to $25,000  per day per  violation,  but the level of  penalties  imposed in any
particular instance is discretionary.  Settlement discussions were held in 1998,
although no settlement was achieved.  On March 8, 1999, the U. S. District Court
ruled on all pending  motions in the case.  It held that:  (1) the  conservation
organization  has  standing  to  bring  the  litigation;  (2)  the  conservation
organization  may rely on continuous  opacity  monitor data to  demonstrate  the
plant's  violation of the opacity  standard;  (3) the Craig  Station  owners may
challenge  the accuracy of the monitor data at trial;  and (4) the  conservation
organization  must prove at trial that the  station has not  operated  with good
pollution control practices.  The U. S. District Court set a pretrial conference
for June 1999 and ordered the parties to participate in a settlement conference.
Resolution of this matter may require the  installation  of additional  emission
control equipment. Management does not believe that any potential liability, the
future impact of this litigation on plant  operations,  or any related cost will
have a  material  adverse  impact  on  PSCo's  financial  position,  results  of
operations or cash flows.


                                       24
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

Fort St. Vrain

     PSCo has completed all decommissioning activities at Fort St. Vrain and the
site has been  released for  unrestricted  use.  PSCo is  currently  operating a
gas-fired combined cycle steam generation plant at this facility.  Spent nuclear
fuel is currently  being stored  on-site in the  Independent  Spent Fuel Storage
Installation  ("ISFSI").  In 1996,  PSCo and DOE entered  into an  agreement  to
resolving all the defueling  issues,  as discussed in the Notes to  Consolidated
Financial  Statements in the NCE and PSCo 1998 Annual  Report on Form 10-K.  The
NRC is  reviewing a final  request to transfer the title of the ISFSI to the NRC
and PSCo anticipates approval in mid-1999.

Leyden Gas Storage Facility

      During August 1998, a Jefferson County, Colorado District Court jury found
PSCo liable for  approximately  $1.8 million for the reduction in land value and
related  damages  resulting from the  allegations  that natural gas had migrated
from the Leyden Gas Storage facility.  PSCo appealed the judgment and recorded a
liability  for  estimated  costs  related to this issue.  The  affected  land is
located north of, but not immediately adjacent to, the storage facility.

Tax Matters

      PSRI, a subsidiary  of PSCo,  owns and manages  permanent  life  insurance
policies  on certain  past and present  employees.  These  corporate  owned life
insurance  ("COLI")  policies  were entered into prior to July 1, 1986. In 1996,
Congress  passed  legislation  to phase out the tax  benefits  with certain COLI
policies, however, PSCo's policies were grandfathered under this legislation. In
August  1998,  the IRS  issued a Notice  of  Proposed  Adjustment  proposing  to
disallow  the 1993 and 1994  deductions  of interest  expense  related to policy
loans on the COLI policies totaling  approximately  $54.6 million. A Request for
Technical  Advice  from the IRS  National  Office with  respect to the  proposed
adjustment is pending.

      Management is vigorously  contesting this issue. PSCo has not recorded any
provision for income tax or interest expense related to this matter.  Management
believes  that the PSCo's tax  deduction of interest  expense on life  insurance
policy loans was in full  compliance  with IRS regulations and believes that the
resolution  of this  matter  will not have a material  adverse  impact on PSCo's
financial position, results of operations or cash flows.

Year 2000 Issue

      The Y2K issue is a result of a universal programming standard that records
dates as six  digits,  e.g.,  mm/dd/yy,  using  only the last two digits for the
year. Any automated system software or firmware that uses two-digit fields could
understand  the year 2000 as the year 1900 if the issue is not  corrected.  This
situation  is not  limited to  computers;  it has the  potential  to affect many
systems,  components and devices, which have embedded computer chips, which, may
be date  sensitive.  The Y2K issue  could  result in a major  system  failure or
miscalculations  and  does  impact  many  NCE  systems  considered  critical  or
important to the  Company's  business  operations.  Systems  posing the greatest
business risks to the Company include power generation and distribution systems,
telecommunications  systems,  energy trading  systems and billing  systems.  The
Company is  correcting  all  potential  Y2K  failure  points  identified  in its
critical  automated systems to maintain service to its customers and to mitigate
legal and financial risks.

      In 1997,  the Company  established  the Y2K Program  Office to oversee all
corporate-wide  Y2K  initiatives.   These  initiatives  encompass  all  computer
software,  embedded systems, as well as contingency planning.  Teams of internal
and external  specialists  were  established  to  inventory  and assess and test
critical  computer programs and automated  operational  systems and modify those
that  may  not be  Y2K  compliant.  The  inventory  and  assessment  phases  for
information  technology  ("IT")  systems were completed in 1998. As of March 31,
1999,  approximately  98% of the remediation and testing phases for all critical
IT systems has been completed.  The remaining work is planned to be completed by
June 30, 1999.  For non-IT  systems,  which exist  primarily in the  generation,
transmission  and  distribution  areas  of  the  business,   the  inventory  and
assessment  phases  have been

                                       25
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

completed.  Remediation  and testing for non-IT  systems are  approximately  76%
completed as of March 31, 1999. The remainder is expected to be completed by the
end of the  third  quarter  of 1999.  Systems  critical  to the  generation  and
delivery of energy are expected to be completed by the end of the second quarter
of 1999.

      The Company  has  identified  third  parties,  with which it has  material
business relationships including  interconnected  utilities,  telecommunications
service  providers,  fuel  and  water  suppliers,  equipment  suppliers,  leased
facilities  and  financial  institutions.  Subject  matter  experts,  along with
functional managers,  continue to evaluate the current list of third parties and
have ongoing discussions with these and other critical suppliers about their Y2K
readiness and contingency planning efforts.

      The Company  currently  expects to incur total costs of approximately  $25
million of operating and capital  expenditures to modify its computer  software,
hardware and other  automated  systems used in operations  enabling  proper data
processing  relating  to the year  2000 and  beyond.  Furthermore,  the  Company
expects to spend approximately $15 million in operating and capital expenditures
for the  accelerated  replacement  of  certain  non-compliant  IT  systems.  The
majority of these costs will be incurred by PSCo and SPS. A significant  portion
of the costs  incurred to address the  Company's  Y2K issues will  represent the
redeployment  of  existing  information  technology  resources.  The table below
details the actual  costs  incurred  during 1998 and prior  periods;  the actual
costs incurred  during the first quarter of 1999; and the total  estimated costs
to be incurred.  A  significant  portion of the  remaining  costs to be incurred
consists of replacement  systems and  contingency  planning  costs, a portion of
which may not ultimately be incurred.
<TABLE>
<CAPTION>

                              Actual         Actual          Remaining      Estimated
                              Costs          Costs           Estimated        Total
                              1998           First            Costs to       Project
                            and Prior     Quarter 1999      be Incurred       Costs 
                            ---------     ------------      -----------       ----- 
                                          (in millions)
<S>                            <C>            <C>               <C>           <C>  
  Operating expenses .....     $8.0           $1.1              $8.7          $17.8
  Capital for automated
     system components ...      0.7            0.3               6.1            7.1
  IT replacement projects:
     Operating............      0.2            0.5               0.3            1.0
     Capital..............      6.4            2.8               4.7           13.9
                              -----            ---               ---         ------
       Total..............    $15.3          $ 4.7            $ 19.8         $ 39.8
                              =====          =====            ======         ======
</TABLE>

      Yorkshire Power has also undertaken  activities to address Y2K issues. The
estimated  proportionate share of Yorkshire's incremental Y2K costs (costs which
would not have been  required in the normal  course of business)  that will flow
through to the Company's earnings as a result of such activities is not expected
to have a material impact on the financial condition or results of operations of
the Company.

      The most  reasonably  likely  worst  case  scenario  resulting  during Y2K
critical  dates is a loss of  production  capacity from certain of the Company's
generating units,  along with the loss of a portion of the communication  system
that is critical to generation and  distribution  control.  The overall blackout
recovery plan for NCE is designed so that this most reasonably likely worst case
scenario would be addressed and electricity restored. NCE is able to isolate its
systems and facilities from the national power grid in the case of a severe grid
disruption.  Isolation  from  the  national  grid is  considered  a last  resort
strategy in the Company's  emergency response  procedures that would be employed
for severe system disruptions,  regardless of Y2K issues. The Company intends to
remain interconnected to the national grid at the millennium  changeover.  Being
interconnected  provides the additional  security of having redundant sources of
electric power supply.  Critical  components of this plan have been and continue
to be tested to provide  assurance  that the Company  will be prepared for risks
which could result from the Y2K millennium change.

      If correction or replacement of non-compliant  systems is not completed on
a timely basis,  the Y2K issues may have a material  impact on the operations of
the Company and its subsidiaries. Management, however, does 

                                       26
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

not  anticipate  these  activities  will have a material  adverse  impact on the
financial  position,  results of  operations or cash flows of the Company or its
subsidiaries.

Employee Matters

      The Company and its subsidiaries are engaged in certain employment related
litigation and intend to contest, or are actively  contesting,  all such claims,
and believe that the ultimate outcome will not have a material adverse impact on
the  financial  position,  results of operations or cash flows of the Company or
its subsidiaries.

6.  Acquisitions  (NCE)

Acquisition of Planergy

      Effective  April 1, 1998,  the  Company  acquired  all of the  outstanding
common stock of Falcon Seaboard Energy Services,  Inc.  ("Planergy") and assumed
other outstanding debt.  Planergy includes Planergy,  Inc. and Planergy Services
and is primarily engaged in energy  consulting,  energy  efficiency  management,
conservation programs and mass-market  services.  Such acquisition was accounted
for using the  purchase  method and the  acquired  assets and  liabilities  were
valued at their  estimated  fair  market  values as of the date of  acquisition.
Planergy  has  been  consolidated  as a  subsidiary  of NC  Enterprises  in  the
Company's consolidated financial statements.

7. Obligated Mandatorily Redeemable Preferred Securities of Subsidiary Trusts
 Holding Solely Subordinated Debentures (NCE, PSCo and SPS)

      In May 1998,  PSCo Capital Trust I, a wholly-owned  trust of PSCo,  issued
7,760,000  shares of its 7.60% Trust  Originated  Preferred  Securities for $194
million.  The sole asset of the trust is $200 million principal amount of PSCo's
7.60% Deferrable Interest Subordinated Debentures, due June 30, 2038. Holders of
the securities are entitled to receive quarterly  dividends at an annual rate of
7.60% of the liquidation  preference value of $25. The securities are redeemable
at the option of PSCo on and after May 11, 2003 at 100% of the principal  amount
outstanding plus accrued interest.  In addition to PSCo's  obligations under the
Subordinated Debentures,  PSCo has agreed, pursuant to a guarantee issued to the
trust and the provisions of the trust  agreement  establishing  the trust,  on a
subordinated  basis,  payment of distributions on the preferred  securities (but
not if the trust does not have sufficient funds to pay such  distributions)  and
to  pay  all  of  the  expenses  of  the  trust   (collectively,   the  "Back-up
Undertakings").  Considered together, the Back-up Undertakings constitute a full
and unconditional guarantee by PSCo of the trust obligations under the preferred
securities.  The proceeds from the sale of the 7.60% Trust Originated  Preferred
Securities  were  used to  redeem  all  $181.8  million  of  PSCo's  outstanding
preferred stock on June 10, 1998, and for general corporate purposes.

      In October 1996,  Southwestern  Public  Service  Capital I, a wholly-owned
trust of SPS,  issued  $100  million of its 7.85%  Trust  Preferred  Securities,
Series A. The sole asset of the trust is $103 million  principal amount of SPS's
7.85% Deferrable  Interest  Subordinated  Debentures,  Series A due September 1,
2036.  The  securities  are redeemable at the option of SPS on and after October
21, 2001 at 100% of the principal amount plus accrued  interest.  In addition to
SPS's obligations under the Subordinated Debentures, SPS has agreed, pursuant to
a  guarantee  issued  to  the  trust,  the  provisions  of the  trust  agreement
establishing  the trust and a  related  expense  agreement  to  guarantee,  on a
subordinated  basis,  payment of distributions on the preferred  securities (but
not if the trust does not have sufficient funds to pay such  distributions)  and
to pay all of the  expenses  of the  trust.  Considered  together,  the  Back-up
Undertakings  constitute a full and unconditional  guarantee by SPS of the trust
obligations under the preferred securities. The proceeds from the sale were used
to reduce short-term debt.


                                       27
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

8. Business Segment Information (NCE, PSCo and SPS)

NCE:
      NCE has three  reportable  segments:  electric  utility,  gas  utility and
international. The electric utility segment consists primarily of the activities
of the three  regulated  operating  companies that provide  wholesale and retail
electric service in the states of Colorado,  Texas, New Mexico,  Wyoming, Kansas
and Oklahoma.  The gas utility segment  consists  primarily of the activities of
three regulated operating companies providing retail gas service in the state of
Colorado and Wyoming.  The international  segment consists of equity investments
in foreign  operations held by NCI since 1997.  Revenues from operating segments
below the quantitative thresholds are included in the all other category.  Those
primarily  include a company involved in  non-regulated  power and gas marketing
activities  throughout the United States; a company that invests in and develops
cogeneration  and  energy  related  projects;  a  company  that  is  engaged  in
engineering, design construction management and other miscellaneous services and
a  company  engaged  in  energy   consulting,   energy  efficiency   management,
conservation programs and mass market services.

      The accounting policies of the segments are the same as those described in
Note 1. Summary of Significant Accounting Policies. NCE evaluates performance by
each legal entity based on profit or loss  generated from the product or service
provided. NCE segment information is as follows (in thousands):

                     Electric       Gas         Inter-      All
March 31, 1999        Utility     Utility     national     Other       Total 
                     --------    --------     --------   --------    --------
Revenues:
 External customers. $614,695    $259,384    $      -    $117,344    $991,423
 Intersegment.......      155       1,959           -      16,686      18,800
Segment profit......   66,820      18,211      18,140       4,721     107,892

                     Electric       Gas         Inter-      All
March 31, 1998        Utility     Utility     national     Other       Total 
                     --------    --------     --------   --------    --------
Revenues:
 External customers. $584,624    $271,243    $      -    $ 83,637    $939,504
 Intersegment.......      159       1,200           -      17,169      18,528
Segment profit......   61,231      25,164       2,799       6,634      95,828

Reconciliations:                            1999        1998  
                                          --------    --------
Profit or Loss
   Total profit for reportable segments   $103,171    $ 89,194
   Other profit....................          4,721       6,634
   Other unallocated amounts.......         (6,592)     (9,679)
                                          --------    --------
      Net income...................       $101,300    $ 86,149
                                          ========    ========

PSCo:
      PSCo has two reportable segments: electric utility and gas utility. During
1998, PSCo had three reportable segments:  electric, gas and international.  The
electric  utility  segment  consists  primarily  of  the  activities  of  PSCo's
regulated  operations that provide  wholesale and retail electric service in the
state of Colorado.  The gas utility segment consists primarily of the activities
of PSCo's regulated gas operations in Colorado. Revenues from operating segments
below the quantitative thresholds are included in the all other category.  Those
segments  primarily include a real estate company which owns certain real estate
interests of PSCo, a company  which owns and manages  permanent  life  insurance
policies  on certain  past and  present  employees  and a finance  company  that
finances certain of PSCo's current assets.  The  International  segment does not
apply  to  PSCo in 1999  as  effective  March  31,  1998,  PSCo  sold  NCI to NC
Enterprises (see Note 3. Investment in Yorkshire Power).

                                       28
<PAGE>

       NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

      The accounting policies of the segments are the same as those described in
Note 1. Summary of Significant  Accounting Policies.  PSCo evaluates performance
by each  legal  entity  based on profit or loss  generated  from the  product or
service provided. PSCo segment information is as follows (in thousands):

                     Electric       Gas         Inter-      All
March 31, 1999        Utility     Utility     national     Other       Total 
                     --------    --------     --------   --------    --------
Revenues from
 external customers. $401,871    $254,171    $      -    $  3,377    $659,419
Segment profit......   44,466      17,989           -       6,865      69,320

                     Electric       Gas         Inter-      All
March 31, 1998        Utility     Utility     national     Other       Total 
                     --------    --------     --------   --------    --------
Revenues from
 external customers. $375,446    $265,483    $      -    $  3,713    $644,642
Segment profit......   44,710      24,878       2,799       2,167      74,544

Reconciliations:                            1999        1998  
                                          --------    --------
Profit or Loss
   Total profit or loss for 
     reportable segments                  $ 62,455    $ 72,387
   Other profit....................          6,865       2,167
   Other unallocated amounts.......         (3,381)     (8,586)
                                          --------    --------
      Net income...................       $ 65,939    $ 65,968
                                          ========    ========

SPS:
     SPS operates in the regulated electric utility industry providing wholesale
and  retail  electric  service in the states of Texas,  New  Mexico,  Kansas and
Oklahoma.  Revenues from external  customers  for this  reportable  segment were
$202.6  million  and $199.7  million for the  quarters  ended March 31, 1999 and
1998, respectively.

9.  Management's Representations (NCE, PSCo and SPS)

      In the opinion of the registrants, the accompanying unaudited consolidated
condensed  financial  statements  for NCE, PSCo and SPS include all  adjustments
necessary for the fair presentation of the financial position of the Company and
its  subsidiaries  at March 31,  1999 and  December  31, 1998 and the results of
operations for the three months ended March 31, 1999 and 1998 and cash flows for
the three  months  ended March 31,  1999 and 1998.  The  unaudited  consolidated
condensed financial  information and notes thereto should be read in conjunction
with the  consolidated  financial  statements and notes included in the combined
1998 Form 10-K for NCE, PSCo and SPS.

      Because of seasonal and other  factors,  the results of operations for the
three  months  ended  March 31,  1999  should not be taken as an  indication  of
earnings for all or any part of the balance of the year.



                                       29
<PAGE>




                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


TO NEW CENTURY ENERGIES, INC.:

We have reviewed the accompanying  consolidated  condensed  balance sheet of New
Century Energies, Inc. (a Delaware corporation) and subsidiaries as of March 31,
1999, and the related consolidated condensed statements of income, shareholders'
equity and cash flows for the three-month periods ended March 31, 1999 and 1998.
These financial statements are the responsibility of the Company's management.

We conducted our review in accordance with standards established by the American
Institute  of  Certified  Public  Accountants.  A review  of  interim  financial
information consists principally of applying analytical  procedures to financial
data and making  inquiries of persons  responsible  for financial and accounting
matters. It is substantially less in scope than an audit conducted in accordance
with  generally  accepted  auditing  standards,  the  objective  of which is the
expression of an opinion  regarding the financial  statements  taken as a whole.
Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material  modifications that should
be  made  to the  financial  statements  referred  to  above  for  them to be in
conformity with generally accepted accounting principles.

We have  previously  audited,  in accordance  with generally  accepted  auditing
standards,  the  consolidated  balance sheet of New Century  Energies,  Inc. and
subsidiaries  as of December 31, 1998,  and the related  consolidated  statement
statements  of  income,  shareholders'  equity  and cash flows for the year then
ended (not presented  separately  herein),  and in our report dated February 23,
1999, we expressed an unqualified opinion on these financial statements.  In our
opinion,  the information set forth in the accompanying  consolidated  condensed
balance  sheet as of  December  31,  1998,  is fairly  stated,  in all  material
respects,  in relation to the consolidated  balance sheet from which it has been
derived.


                                                        ARTHUR ANDERSEN LLP

Denver, Colorado,
May 13, 1999


                                       30
<PAGE>



                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


TO PUBLIC SERVICE COMPANY OF COLORADO:

We have reviewed the accompanying consolidated condensed balance sheet of Public
Service  Company of Colorado (a Colorado  corporation)  and  subsidiaries  as of
March 31, 1999, and the related consolidated  condensed statements of income and
cash flows for the  three-month  periods  ended March 31,  1999 and 1998.  These
financial statements are the responsibility of the Company's management.

We conducted our review in accordance with standards established by the American
Institute  of  Certified  Public  Accountants.  A review  of  interim  financial
information consists principally of applying analytical  procedures to financial
data and making  inquiries of persons  responsible  for financial and accounting
matters. It is substantially less in scope than an audit conducted in accordance
with  generally  accepted  auditing  standards,  the  objective  of which is the
expression of an opinion  regarding the financial  statements  taken as a whole.
Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material  modifications that should
be  made  to the  financial  statements  referred  to  above  for  them to be in
conformity with generally accepted accounting principles.

We have  previously  audited,  in accordance  with generally  accepted  auditing
standards,  the consolidated balance sheet of Public Service Company of Colorado
and  subsidiaries  as  of  December  31,  1998,  and  the  related  consolidated
statements  of income  and cash  flows for the year then  ended  (not  presented
separately  herein),  and in our report dated February 23, 1999, we expressed an
unqualified  opinion  on  these  financial  statements.   In  our  opinion,  the
information set forth in the accompanying  consolidated  condensed balance sheet
as of December 31, 1998, is fairly stated, in all material respects, in relation
to the consolidated balance sheet from which it has been derived.


                                                        ARTHUR ANDERSEN LLP

Denver, Colorado,
May 13, 1999



                                       31
<PAGE>



                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


TO SOUTHWESTERN PUBLIC SERVICE COMPANY:

We have reviewed the accompanying condensed balance sheet of Southwestern Public
Service Company (a New Mexico corporation) as of March 31, 1999, and the related
condensed  statements of income and cash flows for the three-month periods ended
March 31, 1999 and 1998. These financial  statements are the  responsibility  of
the Company's management.

We conducted our review in accordance with standards established by the American
Institute  of  Certified  Public  Accountants.  A review  of  interim  financial
information consists principally of applying analytical  procedures to financial
data and making  inquiries of persons  responsible  for financial and accounting
matters. It is substantially less in scope than an audit conducted in accordance
with  generally  accepted  auditing  standards,  the  objective  of which is the
expression of an opinion  regarding the financial  statements  taken as a whole.
Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material  modifications that should
be  made  to the  financial  statements  referred  to  above  for  them to be in
conformity with generally accepted accounting principles.

We have  previously  audited,  in accordance  with generally  accepted  auditing
standards,  the  balance  sheet of  Southwestern  Public  Service  Company as of
December 31, 1998,  and the related  statements of income and cash flows for the
year then ended  (not  presented  separately  herein),  and in our report  dated
February 23, 1999, we expressed an unqualified  opinion on these statements.  In
our opinion,  the information set forth in the  accompanying  condensed  balance
sheet as of December 31, 1998, is fairly stated,  in all material  respects,  in
relation to the balance sheet from which it has been derived.


                                                        ARTHUR ANDERSEN LLP

Denver, Colorado,
May 13, 1999




                                       32
<PAGE>



Item 2. Management's  Discussion and Analysis of Financial Condition and Results
of Operations (NCE, PSCo and SPS)

NCE's Management's Discussion and Analysis of Financial Condition and Results of
Operations

Three Months  Ended March 31, 1999  Compared to the Three Months Ended March 31,
1998

Merger

      On March 24, 1999,  the Company and NSP entered into an Agreement and Plan
of Merger  providing  for a strategic  business  combination  of the  companies.
Consummation of this "merger of equals" is subject to certain closing conditions
and the  obtaining of  applicable  regulatory  and  shareholder  approval and is
expected  to take from 12 to 18 months to  complete.  The NCE/NSP  Merger  would
create a top 10 gas and electric energy company in the U.S. The combined company
would  serve  approximately  3 million  electricity  customers  and 1.5  million
natural gas customers in portions of twelve states.  See Note 2. Proposed Merger
with Northern States Power Company in Item 1. FINANCIAL STATEMENTS.

Earnings

      Earnings per share (basic and diluted) were $0.88 for the first quarter of
1999 as compared to $0.78 per share (basic and diluted) for the first quarter of
1998.  Higher  earnings were  primarily  attributed to increased  electric sales
resulting from continued customer growth and an increased  contribution from the
Company's  investment  in  Yorkshire  Power.  Electric  customer  growth  in the
Colorado  region was  approximately  2.6% over the prior  year,  with  growth in
natural gas customers  rising 3.4%. Mild winter weather during the first quarter
1999, more than offset the favorable  impact of this growth.  Temperatures  were
approximately 14% warmer during the first quarter of 1999 when compared to prior
year first quarter, lowering demand and reducing earnings by approximately $0.04
per share.

Electric Operations

      The following table details the change in electric  operating revenues and
energy  costs for the first  quarter of 1999 as  compared  to the same period in
1998 (thousands of dollars).
                                                      Increase (Decrease)
Electric operating revenues:
 Retail...............................................     $  (827)
 Wholesale............................................      24,290
 Non-regulated power marketing........................      (1,353)
 Other (including unbilled revenues and provision for
   rate refunds) .....................................       6,608
                                                             -----
  Total revenues......................................      28,718
Fuel used in generation...............................      (7,070)
Purchased power.......................................      12,556
                                                           -------
  Net increase in electric margin.....................     $23,232
                                                           =======

                                       33
<PAGE>


      The following table compares  electric Kwh sales by major customer classes
for the first quarter of 1999 and 1998.

                                              Millions of Kwh Sales
                                                1999      1998    % Change *
                                                ----      ----    ----------
Residential................................     2,711     2,680      1.1%
Commercial and Industrial..................     6,660     6,592      1.0
Public Authority...........................       182       181      0.5
                                                -----     -----
  Total Retail.............................     9,553     9,453      1.1
Wholesale..................................     3,589     2,736     31.2
Non-regulated power marketing..............       647       823    (21.3)
                                                  ---       --- 
Total......................................    13,789    13,012      6.0
                                               ======    ======

*  Percentages are calculated using unrounded amounts

      Electric  margin  increased in the first quarter of 1999, when compared to
the first  quarter  of 1998,  due  primarily  to a 6%  increase  in total  sales
resulting from total customer growth of 2.2%.  PSCo's higher wholesale  electric
sales,  reflecting increased marketing  activities for economy,  short-term firm
and off-system  sales,  contributed  to increased  operating  revenues,  but the
margin on such  sales was  minimal.  SPS's  higher  retail and  wholesale  sales
resulted  primarily due to higher  delivered but not billed wholesale and retail
revenues.

      The Company's regulated subsidiaries have cost adjustment mechanisms which
recognize the majority of the effects of changes in fuel used in generation  and
purchased  power costs and allow  recovery of such costs on a timely  basis.  In
connection  with the ICA, which allows for a 50%/50% sharing of certain fuel and
energy cost  increases and decreases  among  customers  and  shareholders,  PSCo
recognized cost savings of  approximately  $3.5 million during the first quarter
1999. The ICA did not significantly impact electric margin for the first quarter
of 1998.

      Fuel used in generation  expense  decreased  $7.1 million during the first
quarter of 1999, as compared to the same quarter in 1998, due primarily to lower
coal and gas costs at SPS.  This  decrease  in coal  costs is  primarily  due to
negotiations  with a new  supplier in mid-1998 and lower  transportation  costs,
while the decrease in gas costs is  attributable  to lower  per-unit gas prices.
This  decrease  was  offset in part by an  increase  in  expense  by PSCo due to
increased generation levels at its power plants.

      Purchased  power expense  increased $12.6 million during the first quarter
of 1999,  as compared to the same  quarter in 1998,  primarily  due to purchases
related to increased  wholesale  marketing  activities at PSCo ($10.7  million).
Purchased  power  expense at SPS increased  $2.5 million  primarily due to a 41%
increase in wholesale  purchases  and higher spot market  prices.  SPS generates
substantially  all of its  power  for  sale to its  firm  retail  and  wholesale
customers  and sells  non-firm  energy as the  market  demands.  Similarly,  SPS
purchases low-cost non-firm energy when available.


                                       34
<PAGE>


Gas Operations

      The  following  table details the change in gas revenues and gas purchased
for resale for the first  quarter of 1999 as compared to the same period in 1998
(thousands of dollars).

                                                     Increase (Decrease)
                                                     -------------------

Revenues from gas sales (including unbilled revenues).     $26,688
Gas purchased for resale..............................      36,719
                                                           -------
 Net decrease in gas sales margin.....................     (10,031)
Transportation revenues...............................       1,293
                                                           -------
 Decrease in net gas margin...........................     $(8,738)
                                                           =======

      The following table compares gas Dth deliveries by major customer  classes
for the first quarter of 1999 and 1998.

                                      Millions of Dth Deliveries
                                                1999   1998    % Change *
                                                ----   ----    ----------
Residential................................     39.0   39.9      (2.4)%
Commercial.................................     18.0   19.3      (6.6)
Non-regulated gas marketing................     39.5   16.4      **
                                               -----  -----
  Total Sales..............................     96.5   75.6      27.7
Transportation.............................     31.3   27.5      14.0
                                               -----  -----
  Total....................................    127.8  103.1      24.0
                                               =====  ===== 

*  Percentages are calculated using unrounded amounts
** Percentage change is significant, but presentation of the amount is not
   meaningful

      Gas sales margin decreased during the first quarter of 1999, when compared
to the first  quarter of 1998,  primarily  due to lower sales at PSCo  resulting
from the  effects of mild  winter  weather in 1999,  despite a 3.4%  increase in
customers.  As previously  noted,  weather  during the first quarter of 1999 was
approximately  14%  warmer  than  the  first  quarter  of 1998.  Although  sales
increased at the Company's  non-regulated  subsidiaries the margin on such sales
decreased primarily due to lower average market sales prices.

      Gas transportation  revenues  increased  approximately $1.3 million during
the first quarter of 1999, when compared to the first quarter of 1998, primarily
due to higher deliveries.  The increase in transport  deliveries continues to be
impacted by the shifting of various commercial customers to transport customers,
some  of  which  become  retail   customers  of  the   Company's   non-regulated
subsidiaries.

      PSCo and  Cheyenne  have in place GCA  mechanisms  for  natural gas sales,
which  recognizes  the  majority  of the  effects  of changes in the cost of gas
purchased  for resale and adjusts  revenues to reflect such changes in cost on a
timely  basis.  As a result,  the  changes  in  revenues  associated  with these
mechanisms during the first quarter of 1999, as compared to the first quarter of
1998, had little impact on net income.  However,  the  fluctuations in gas sales
impact  the  amount  of gas the  Company's  gas  utilities  must  purchase  and,
therefore,  along with the  increases and decreases in the per-unit cost of gas,
affect total gas purchased for resale.

Other Operating Revenues

      Other operating revenues decreased approximately $4.8 million due to lower
revenues from diversified energy businesses,  primarily engineering,  design and
construction management,  offset in part by an increase in energy management and
consulting services.

                                       35
<PAGE>


Non-Fuel Operating Expenses and Other Income and Deductions

      Other operating and maintenance  expense-regulated  decreased $0.2 million
from the continued deployment of cost saving-programs  instituted as part of the
PSCo/SPS merger. Other operating and maintenance expense-non-regulated increased
$2.6 million primarily due to increased operating cost due to the acquisition of
Planergy, effective April 1, 1998.

      Depreciation and amortization expense increased $7.1 million primarily due
to higher depreciation expense from property additions.

      Equity  in  earnings   of   Yorkshire   Power  and  other   unconsolidated
subsidiaries  increased  $12.1 million  primarily  due to increased  earnings of
Yorkshire  Power.  NCI's  equity in earnings of  Yorkshire  Power  increased  by
approximately  $13.9 million for the first  quarter  1999,  when compared to the
same period in 1998,  primarily due an increase in gas supply business  margins.
In addition, during 1998 Yorkshire Power recognized a penalty, applicable to all
United Kingdom regional electricity utilities, designed to recognize the effects
of the delay in  implementation  of full  competition  (NCI's  portion  was $4.2
million).

      Interest  charges and preferred  dividends of subsidiaries  increased $1.8
million  during the first quarter of 1999,  when compared to the same quarter in
1998.  The  increase  is  primarily  attributable  to costs to  finance  capital
expenditures,  including  higher interest costs on long-term debt resulting from
the April 1998 issuance of $250 million of long-term debt. Additionally,  in May
1998,  PSCo  issued  $194  million  of  Trust  Preferred   Originated  Preferred
Securities. The proceeds were used to redeem all of PSCo's outstanding preferred
stock  (totaling  $181.8  million)  in June 1998  (see  Note 7.  PSCo  Obligated
Mandatorily  Redeemable  Preferred Securities of Subsidiary Trust Holding Solely
Subordinated Debentures in Item 1. FINANCIAL STATEMENTS).

      Income taxes declined $10.0 million during the first quarter of 1999, when
compared to the same quarter in 1998  primarily due to lower pre-tax income from
non-regulated  operations,  the  recognition  of additional  Colorado  State tax
credits and the  recognition  of the  favorable tax impact of certain prior year
PSCo severance costs that were previously recognized as non-deductible.

Market Risks

      NCE and its subsidiaries are exposed to market risks, including changes in
commodity prices,  interest rates and currency exchange rates as fully disclosed
in the NCE,  PSCo and SPS 1998  Annual  Report  on Form  10-K.  NCE's  regulated
subsidiaries have limited exposure to commodity price and interest rate risk due
to cost-based rate regulation.  Exposure to currency exchange risk is related to
NCE's  investment in Yorkshire  Power (see Note 3. Investment in Yorkshire Power
in Item 1.  FINANCIAL  STATEMENTS).  There have been no material  changes in the
market risk exposures that affect the quantitative  and qualitative  disclosures
presented as of December 31, 1998 in the 1998 Annual Report on Form 10-K.

Commitments and Contingencies

Year 2000 Issue

      The Y2K issue is a result of a universal programming standard that records
dates as six  digits,  e.g.,  mm/dd/yy,  using  only the last two digits for the
year. Any automated system software or firmware that uses two-digit fields could
understand  the year 2000 as the year 1900 if the issue is not  corrected.  This
situation  is not  limited to  computers;  it has the  potential  to affect many
systems,  components and devices, which have embedded computer chips, which, may
be date  sensitive.  The Y2K issue  could  result in a major  system  failure or
miscalculations  and  does  impact  many  NCE  systems  considered  critical  or
important to the  Company's  business  operations.  Systems  posing the greatest
business risks to the Company include power generation and distribution systems,
telecommunications  systems,  energy trading  systems and billing  systems.  The
Company is  correcting  all

                                       36
<PAGE>

potential Y2K failure  points  identified in its critical  automated  systems to
maintain service to its customers and to mitigate legal and financial risks.

      In 1997,  the Company  established  the Y2K Program  Office to oversee all
corporate-wide  Y2K  initiatives.   These  initiatives  encompass  all  computer
software,  embedded systems, as well as contingency planning.  Teams of internal
and external  specialists  were  established  to  inventory  and assess and test
critical  computer programs and automated  operational  systems and modify those
that  may  not be  Y2K  compliant.  The  inventory  and  assessment  phases  for
information  technology  ("IT")  systems were completed in 1998. As of March 31,
1999,  approximately  98% of the remediation and testing phases for all critical
IT systems has been completed.  The remaining work is planned to be completed by
June 30, 1999.  For non-IT  systems,  which exist  primarily in the  generation,
transmission  and  distribution  areas  of  the  business,   the  inventory  and
assessment  phases  have been  completed.  Remediation  and  testing  for non-IT
systems are  approximately  76% completed as of March 31, 1999. The remainder is
expected  to be  completed  by the end of the  third  quarter  of 1999.  Systems
critical to the  generation  and delivery of energy are expected to be completed
by the end of the second quarter of 1999.

      The Company  has  identified  third  parties,  with which it has  material
business relationships including  interconnected  utilities,  telecommunications
service  providers,  fuel  and  water  suppliers,  equipment  suppliers,  leased
facilities  and  financial  institutions.  Subject  matter  experts,  along with
functional managers,  continue to evaluate the current list of third parties and
have ongoing discussions with these and other critical suppliers about their Y2K
readiness and contingency planning efforts.

      The Company  currently  expects to incur total costs of approximately  $25
million of operating and capital  expenditures to modify its computer  software,
hardware and other  automated  systems used in operations  enabling  proper data
processing  relating  to the year  2000 and  beyond.  Furthermore,  the  Company
expects to spend approximately $15 million in operating and capital expenditures
for the  accelerated  replacement  of  certain  non-compliant  IT  systems.  The
majority of these costs will be incurred by PSCo and SPS. A significant  portion
of the costs  incurred to address the  Company's  Y2K issues will  represent the
redeployment  of  existing  information  technology  resources.  The table below
details the actual  costs  incurred  during 1998 and prior  periods;  the actual
costs incurred  during the first quarter of 1999; and the total  estimated costs
to be incurred.  A  significant  portion of the  remaining  costs to be incurred
consists of replacement  systems and  contingency  planning  costs, a portion of
which may not ultimately be incurred.
<TABLE>
<CAPTION>

                              Actual         Actual          Remaining      Estimated
                              Costs          Costs           Estimated        Total
                              1998           First            Costs to       Project
                            and Prior     Quarter 1999      be Incurred       Costs 
                            ---------     ------------      -----------       ----- 
                                          (in millions)
<S>                            <C>            <C>               <C>           <C>  
  Operating expenses ....      $8.0           $1.1              $8.7          $17.8
  Capital for automated
     system components ..       0.7            0.3               6.1            7.1
  IT replacement projects:
     Operating...........       0.2            0.5               0.3            1.0
     Capital.............       6.4            2.8               4.7           13.9
                                ---           ----               ---           ----
       Total.............     $15.3          $ 4.7             $19.8          $39.8
                              =====          =====             =====          =====
</TABLE>

      Yorkshire Power has also undertaken  activities to address Y2K issues. The
estimated  proportionate share of Yorkshire's incremental Y2K costs (costs which
would not have been  required in the normal  course of business)  that will flow
through to the Company's earnings as a result of such activities is not expected
to have a material impact on the financial condition or results of operations of
the Company.

      The most  reasonably  likely  worst  case  scenario  resulting  during Y2K
critical  dates is a loss of  production  capacity from certain of the Company's
generating units, along with loss of a portion of the communication  system that
is  critical to  generation  and  distribution  control.  The  overall  blackout
recovery plan for NCE is designed so that this most reasonably likely worst case
scenario would be addressed and electricity restored. NCE

                                       37
<PAGE>

is able to isolate its systems and  facilities  from the national  power grid in
the case of a severe  grid  disruption.  Isolation  from  the  national  grid is
considered a last resort strategy in the Company's emergency response procedures
that would be employed for severe system disruptions,  regardless of Y2K issues.
The  Company  intends  to  remain  interconnected  to the  national  grid at the
millennium changeover.  Being interconnected provides the additional security of
having redundant sources of electric power supply.  Critical  components of this
plan have been and continue to be tested to provide  assurance  that the Company
will be prepared for risks which could result from the Y2K millennium change.

      If correction or replacement of non-compliant  systems is not completed on
a timely basis,  the Y2K issues may have a material  impact on the operations of
the Company and its subsidiaries. Management, however, does not anticipate these
activities  will  have a  material  adverse  impact on the  financial  position,
results of operations or cash flows of the Company or its subsidiaries.

Common Stock Dividend

      The Board of  Directors  approved  a $0.58 per share  dividend  payable to
shareholders of the Company for the first quarter of 1999. The Company's  common
stock dividend level is dependent upon the Company's financial position, results
of operations,  cash flows and other factors, including the proposed merger with
NSP. The Board of Directors of the Company will  continue to evaluate the common
stock dividend on a quarterly basis.

Liquidity and Capital Resources

Cash Flows - Three Months Ended March 30
                                                1999      1998    Increase
                                                ----      ----    --------
Net cash provided by operating activities
 (in millions)                                 $232.1     $207.8    $24.2

      Cash  provided by operating  activities  increased  during the first three
months of 1999,  when compared to the first three months of 1998,  primarily due
to higher earnings from regulated utility  operations and collection of purchase
gas and electric energy costs.

                                                1999         1998     Decrease
                                                ----         ----     --------
Net cash used in investing activities
 (in millions)                                 $(114.4)   $(122.3)   $(7.9)

      Cash used in investing  activities decreased during 1999, when compared to
1998, primarily due to the decrease in construction expenditures.

                                                1999         1998     Increase
                                                ----         ----     --------
Net cash used in financing activities
 (in millions)                                 $(89.5)     $(82.1)    $(7.4)

      Cash used in financing  activities increased during 1999, when compared to
1998,  primarily due to the reduction of short-term debt offset, in part, by the
issuance of medium term notes at SPS.

Financing Activities

Long-Term Debt

      During  the first  quarter  of 1999,  PSCo  refinanced  a  portion  of its
pollution  control  bonds in the amount of $48.75  million to take  advantage of
lower interest  rates.  The interest rate on the new bonds is 5.1% compared to 5
7/8% on $21.5 million and 7 3/8% on $27.25 million. In addition, SPS issued $100
million of 6.2%  unsecured  senior notes due March 1, 2009. The proceeds will be
used  initially  for the  repayment  of certain  short-term  debt,  pending  the
retirement  of $90 million of SPS 6 7/8% First  Mortgage  Bonds due  December 1,
1999 and for other general corporate purposes.

                                       38
<PAGE>

PSCo Obligated Mandatorily Redeemable Preferred Securities

      In May 1998, PSCo Capital Trust I, a wholly-owned trust of PSCo, issued in
a  public  offering  $194  million  of  its  7.60%  Trust  Originated  Preferred
Securities.  The sole  asset of the trust is $200  million  principal  amount of
PSCo's 7.60% Deferrable Interest Subordinated  Debentures due June 30, 2038. The
proceeds from the sale of the 7.60% Trust Originated  Preferred  Securities were
used to redeem all of PSCo's outstanding preferred stock totaling $181.8 million
on June 10, 1998, and for general corporate purposes.

Electric Utility Industry

      Electric  utilities  have  historically  operated  in a  highly  regulated
environment  in which they have an  obligation  to provide  electric  service to
their  customers  in return for an  exclusive  franchise  within  their  service
territory  with  an  opportunity  to  earn a  regulated  rate  of  return.  This
regulatory  environment  is  changing.  The  generation  sector has  experienced
competition from nonutility power producers and the FERC is requiring utilities,
including the Company's subsidiaries,  to provide wholesale transmission service
to others and may order electric utilities to enlarge their transmission systems
to  facilitate  transmission  services  without  impairing  reliability.   State
regulatory  authorities  are in the process of changing  utility  regulations in
response to federal and state statutory changes and evolving markets,  including
consideration of providing open access to retail customers. All of the Company's
jurisdictions   continue  to  evaluate  utility   regulations  with  respect  to
competition.  A summary of recent  developments in 1999 is discussed  below. The
Company is unable to predict what financial impact or effect the  implementation
of these  legislative  changes or the adoption of other  proposals might have on
its operations.

New Mexico

      On April 8, 1999,  New Mexico enacted the Electric  Utility  Restructuring
Act of 1999,  which allows customer choice for residential and small  commercial
customers  beginning  January 1, 2001.  All remaining  customers will be allowed
customer choice on January 1, 2002. The legislation  provides for recovery of no
less than 50% of stranded costs  quantified by the NMPRC.  Transition costs must
be approved by the NMPRC prior to being recovered through a non-bypassable wires
charge,  which must be included in a transition plan filing. All public electric
utilities  operating in New Mexico must file a transition plan with the NMPRC by
March 1, 2000.

Colorado

      On April 26, 1999, the Colorado  legislature  approved a bill,  which will
allow natural gas public  utilities to  voluntarily  submit plans to the CPUC to
open their  markets and enable  customers to choose their  natural gas supplier.
Currently,  PSCo provides a traditional  bundled gas service with rates designed
for the  recovery  of  actual  gas  costs  through  the  GCA  and for  providing
transportation and delivery services.  Delivery of natural gas would continue to
be  regulated,  with  delivery  companies  required  to offer  nondiscriminatory
pipeline  access to  competitors.  The bill must be approved by the  governor by
June 4, 1999, in order for it to be enacted.  PSCo is currently  evaluating this
legislation.

New Accounting Standard

     Effective  January  1,  1999,  the  Company  and its  subsidiaries  adopted
Emerging  Issues Task Force 98-10  ("EITF"),  "Accounting for Energy Trading and
Risk  Management  Activities."  This EITF provides  guidance for  accounting for
energy contracts as part of energy and risk management activities.  The adoption
of EITF did not have a material impact on the Company's  consolidated  financial
statements.

                                       39
<PAGE>


PSCo's  Management's  Discussion and Analysis of Financial Condition and Results
of Operations

Earnings Available for Common Stock

      Earnings  were $65.9 million for the first quarter of 1999, as compared to
$66.0  million for the first  quarter of 1998.  An  increase in electric  margin
resulting  from strong  customer  growth of 2.6% was offset by a decrease in gas
margin, resulting from unseasonably warm weather in the current quarter, despite
customer growth of 3.4%.

Electric Operations

      The following table details the change in electric  operating revenues and
energy costs for the three months ended March 31, 1999,  as compared to the same
period in 1998 (in thousands of dollars).

                                              Increase (Decrease)
                                              -------------------
Electric operating revenues:
 Retail.......................................    $ 9,133
 Wholesale....................................     26,675
 Other (including unbilled revenues)..........     (9,383)
                                                  -------
  Total revenues..............................     26,425
Fuel used in generation.......................      1,236
Purchased power...............................     10,718
                                                  -------
  Net increase in electric margin.............    $14,471
                                                  =======

       The following table compares electric Kwh sales by major customer classes
for the three months ended March 31, 1999 and 1998.

                                     Millions of Kwh Sales
                                     ---------------------
                                        1999     1998      % Change *
                                        ----     ----      ----------
Residential .....................       1,932    1,856        4.1%
Commercial and Industrial .......       3,922    3,755        4.5
Public Authority ................          48       47        1.3
                                       ------   ------
  Total Retail...................       5,902    5,658        4.3
Wholesale........................       2,255    1,494       51.1
                                       ------   ------
Total............................       8,157    7,152       14.1
                                       ======   ======
*  Percentages are calculated using unrounded amounts

      Electric  margin  increased in the first quarter of 1999, when compared to
the  first  quarter  of  1998,  primarily  due to  higher  retail  sales of 4.3%
resulting  primarily from customer growth of approximately 2.6% and the positive
impact of a lower 1999 provision for estimated  customer refunds  (approximately
$2.5 million) in connection with the earnings sharing in excess of 11% return on
equity (see Note 4. Regulatory Matters in Item 1. FINANCIAL STATEMENTS).  Higher
wholesale electric sales, reflecting increased marketing activities for economy,
short-term firm and off-system  sales,  also contributed to increased  operating
revenues; however, the margin on such sales is minimal.

      PSCo has cost  adjustment  mechanisms  which recognize the majority of the
effects of changes in fuel used in  generation  and  purchased  power  costs and
allow  recovery of such costs on a timely  basis.  In  connection  with the ICA,
which allows for a 50%/50% sharing of certain fuel and energy cost increases and
decreases  among  customers and  shareholders,  PSCo  recognized cost savings of
approximately  $3.5  million  during  the first  quarter  1999.  The ICA did not
significantly impact electric margin for the first quarter of 1998.

      Fuel used in  generation  expense  increased  approximately  $1.2  million
during  the first  quarter of 1999,  as  compared  to the same  quarter in 1998,
primarily due to increased generation levels at PSCo's power plants.

                                       40
<PAGE>

      Purchased  power expense  increased $10.7 million during the first quarter
of 1999,  as  compared  to the same  quarter  in 1998,  primarily  due to higher
purchases related to wholesale marketing activities.

Gas Operations

      The following  table details the change in revenues from gas sales and gas
purchased  for resale for the first  quarter of 1999,  as  compared  to the same
period in 1998 (in thousands of dollars).

                                                         Increase (Decrease)
                                                         -------------------

Revenues from gas sales (including unbilled revenues)       $(12,603)
Gas purchased for resale........................              (3,640)
                                                             -------
  Net decrease in gas sales margin..............              (8,963)
Transportation revenues.........................               1,291
                                                             -------
  Decrease in net gas margin....................             $(7,672)
                                                             =======

      The following table compares gas Dth deliveries by major customer  classes
for the first quarter of 1999 and 1998.

                                    Millions of Dth Deliveries
                                    --------------------------
                                        1999      1998          % Change *
                                        ----      ----          ----------
Residential...................            37.9      38.9         (2.5)%
Commercial....................            17.1      18.4         (6.9)
                                       -------  --------
  Total Sales  ...............            55.0      57.3         (3.9)
Transportation................            26.5      23.3         14.1
                                       -------  --------
  Total.......................            81.5      80.6          1.3
                                       =======  ========
*  Percentages are calculated using unrounded amounts

      Gas sales margin decreased during the first quarter of 1999, when compared
to the first quarter of 1998,  despite a 3.4%  increase in customers,  primarily
due to a 3.9%  decrease  in retail gas sales,  which  resulted  from mild winter
weather, with temperatures 14% warmer than the prior year.

      Gas  transportation  revenues  increased  $1.3  million  during  the first
quarter of 1999, compared to the first quarter of 1998,  primarily due to higher
deliveries. The increase in transport deliveries continues to be impacted by the
shifting of various commercial customers to transport customers.

      PSCo has in place a GCA mechanism for natural gas sales,  which recognizes
the majority of the effects of changes in the cost of gas  purchased  for resale
and adjusts  revenues to reflect such changes in costs on a timely  basis.  As a
result,  the changes in revenues  associated  with these  mechanisms  during the
first  quarter of 1999,  as  compared to the first  quarter of 1998,  had little
impact on net income.  However, the fluctuations in gas sales impacts the amount
of gas PSCo must purchase and, therefore, along with the increases and decreases
in the per-unit cost of gas, affect total gas purchased for resale. The decrease
in the quantity of gas  purchased  in the first  quarter of 1999 was the primary
contributor  to the  overall  decrease  in the total cost of gas  purchased  for
resale.

Non-Fuel Operating Expenses and Other Income and Deductions

      Depreciation  and  amortization  increased  $5.6 million  during the first
quarter of 1999, as compared to the first quarter of 1998,  primarily due to the
depreciation of property additions.

      Income taxes decreased approximately $7.6 million during the first quarter
of 1999,  as  compared  to the first  quarter  of 1998,  primarily  due to lower
pre-tax income, the recognition of additional Colorado state tax

                                       41
<PAGE>

credits and the  recognition  of the favorable  tax impact of deducting  certain
prior year severance costs that were previously recognized as non-deductible.

      Other  income  and  deductions  decreased  $2.1  million  during the first
quarter of 1999,  as compared to the first  quarter of 1998.  On March 31, 1998,
NCI and its subsidiaries  were  transferred  through the sale by PSCo of all the
outstanding  common  stock  of NCI  at  net  book  value  (approximately  $292.6
million),  to NC  Enterprises,  an  intermediate  holding  company  of NCE,  and
received as  consideration  a promissory  note from NC Enterprises  (see Note 3.
Investment  in  Yorkshire  Power in Item 1.  FINANCIAL  STATEMENTS).  The  first
quarter of 1999 includes  approximately  $3.2 million of interest  income on the
promissory note,  excluding income taxes,  compared to the recognition of equity
earnings  associated with PSCo's  investment in Yorkshire Power of approximately
$3.4 million in the first quarter of 1998. In addition, other non-utility income
decreased $1.4 million.

      Interest  charges and dividend  requirements  on preferred stock increased
approximately  $2.2 million during the first quarter of 1999, as compared to the
first  quarter of 1998.  The  increase  is  primarily  attributable  to costs to
finance capital expenditures,  including higher interest costs on long-term debt
resulting  from the April  1998  issuance  of $250  million of  long-term  debt.
Additionally,  in  May  1998,  PSCo  issued  $194  million  of  Trust  Preferred
Originated Preferred Securities.  The proceeds were used to redeem all of PSCo's
outstanding  preferred stock (totaling $181.8 million) in June 1998 (see Note 7.
Obligated  Mandatorily  Redeemable  Preferred  Securities of  Subsidiary  Trusts
Holding Solely Subordinated Debentures in Item 1. FINANCIAL STATEMENTS).

Commitments and Contingencies

    See Note 5. Commitments and Contingencies in Item 1. FINANCIAL STATEMENTS.

Financing Activities

      Discussion  relating  to PSCo's  financing  activities  is  covered  under
"Financing  Activities"  in  NCE's  Management's   Discussion  and  Analysis  of
Financial Condition and Results of Operations.


                                       42
<PAGE>


SPS's Management's Discussion and Analysis of Financial Condition and Results of
Operations

Earnings Available for Common Stock

      Earnings  available  for common stock  increased  $5.3 million  during the
first  quarter  of 1999 as  compared  to the  same  quarter  in  1998.  Earnings
increased  primarily  due to an increase  in electric  margin and the absence of
SPS/PSCo merger and business integration expenses in 1999.

Operating Revenues

Electric Operations

      Substantially  all of SPS's  operating  revenues  result  from the sale of
electric energy.  The principal  factors  impacting  revenues are the amount and
price of energy  sold.  The  following  table  details  the  change in  electric
operating  revenues  and energy costs for the three months ended March 31, 1999,
as compared to the same period in 1998 (thousands of dollars).

                                            Increase (Decrease)
                                            -------------------
     Electric operating revenues:
      Retail..............................        $(10,875)
      Wholesale...........................          (2,385)
      Other (including unbilled revenues).          16,080
                                                   -------
        Total revenues....................           2,820
     Fuel used in generation..............          (8,237)
     Purchased power......................           2,464
                                                   -------
        Net increase in electric margin...         $ 8,593
                                                   =======

      The following table compares  electric Kwh sales by major customer classes
for the three months ended March 31, 1999 and 1998.

                                  Millions of Kwh Sales
                                  ---------------------
                                     1999        1998          % Change*
                                     ----        ----          ---------
      Residential ............         717         764          (6.2)%
      Commercial  ............         669         663           0.9
      Industrial  ............       1,905       2,014          (5.4)
      Public Authority .......         133         132           0.3
                                     -----       -----
        Total Retail..........       3,424       3,573          (4.2)
      Wholesale...............       1,333       1,243           7.3
                                     -----       -----
      Total...................       4,757       4,816          (1.2)
                                     =====       =====
* Percentages are calculated using unrounded amounts.

      Electric  operating  revenues  increased  $2.8  million or 1.4% during the
first quarter in 1999,  when compared to the same period in 1998,  primarily due
to higher unbilled  revenues  offset,  in part, by lower revenues related to the
recovery of fuel costs totaling $12.6 million.  A portion of the decrease in Kwh
sales resulted from a change in the billing cycle of various customers, which is
offset by the higher level of unbilled  revenues.  In addition,  the Company has
made additional non-firm wholesale sales as a result of the Company's lower fuel
costs.

      Fuel used in generation  expense decreased $8.2 million or 9.1% during the
first quarter of 1999,  when compared to the same period in 1998,  primarily due
to  lower  coal and gas  costs  for the  quarter  offset,  in part,  by a slight
increase in generation levels required to serve retail and wholesale  customers.
The decrease in coal costs is primarily due to negotiations  with a new supplier
in  mid-1998  and  lower  transportation  costs.  Cost of  natural


                                       43
<PAGE>

gas used in generation  decreased  $3.8 million during the first quarter of 1999
primarily due to lower gas prices  offset,  in part, by increased gas generation
at Cunningham Station during the current period.

      Purchased  power  increased $2.5 million during the first quarter of 1999,
when  compared to the same period in 1998,  due to higher spot market prices and
an increase in wholesale purchases. SPS generates substantially all of its power
for sale to its firm retail and wholesale customers and sells non-firm energy as
the market demands.  Similarly,  SPS will purchase low-cost non-firm energy when
available and as needed to meet customer requirements.

      SPS has fuel cost  adjustment  mechanisms  which recognize the majority of
the effects of changes in fuel used in generation and purchased  power costs and
allow  recovery  of such costs on a timely  basis.  As a result,  the changes in
revenues associated with these mechanisms during the first quarter of 1999, when
compared to the first quarter of 1998, had little impact on net income.

Non-Fuel Operating Expenses

      Other operating and maintenance  expenses  decreased $0.6 million from the
continued  deployment of cost saving programs instituted as part of the PSCo/SPS
Merger.

      Taxes other than income  taxes  increased  $1.3  million  during the first
quarter of 1999, as compared to the same period in 1998, primarily due to higher
property and franchise taxes.

      Income taxes  increased  $3.1 million during the first quarter of 1999, as
compared  to the same  period  in 1998,  primarily  due to the  effect of higher
pre-tax income. The effective income tax rates for the first quarter of 1999 and
1998 were 38.1% and 38.2%, respectively.

Other Income and Deductions - Net

      Other income and  deductions-net  increased  $1.0 million during the first
quarter of 1999,  as compared to the same period in 1998,  primarily  due to the
absence of  PSCo/SPS  Merger and  business  integration  expenses  in 1999 ($1.2
million in 1998).

Interest Charges

      Other interest expense  decreased $1.0 million during the first quarter of
1999, as compared to the same period in 1998,  primarily due to lower short-term
borrowing costs resulting from lower interest rates. This decrease was offset by
a decrease in the allowance for funds used during  construction of approximately
$1.1 million resulting from lower construction in progress balances.


Financial Condition

      Discussions  relating to material changes in SPS's financial condition are
covered under  "Liquidity and Capital  Resources" and "Financing  Activities" in
NCE's Management's Discussion and Analysis of Financial Condition and Results of
Operations.


                                       44
<PAGE>


                           PART II - OTHER INFORMATION

Item 1.  Legal Proceedings

      Part 1.  See Note 5.  Commitments and Contingencies in Item 1, Part 1.

Item 6.  Exhibits and Reports on Form 8-K

(a)   Exhibits
      2(a)1*  NCE/NSP  Agreement  and Plan of Merger dated March 24, 1999 (Form
              8-K, March 24, 1999, Exhibit 2.1).

      3(a)1*  NCE Restated Articles of Incorporation  dated December 8, 1995 
             (Form S-4, Exhibit 3(a)).

      3(a)2* PSCO Amended and Restated  Articles of Incorporation dated July 10,
             1998 (Form 10-K, December 31, 1998, Exhibit 3(a)1).
      
      3(a)3* SPS Amended and Restated Articles of Incorporation dated September
             30, 1997 (Form 10-K, December 31, 1997, Exhibit 3(a)2).

      3(b)1* NCE Restated By-laws dated December 15, 1998 (Form 10-K, December 
             31, 1998, Exhibit 3(b)1).

      3(b)2* PSCO By-laws dated November 20, 1997 (Form 10-K, December 31, 1997,
             Exhibit 3(b)1).

      3(b)3* SPS By-laws dated September 29, 1997 (Form 10-K, December 31, 1997,
             Exhibit 3(b)2).

      10(a) Senior  Executive  Severance  Policy,  effective  March 24,  1999, 
            between  New Century Energies, Inc. and Senior Executives.
      10(b) The employment  agreement,  dated March 24, 1999,  among  Northern
            States Power Company, New Century Energies, Inc., and Wayne H.
            Brunetti.

      12(a) Computation of Ratio of Consolidated  Earnings to Consolidated Fixed
            Charges for PSCo is set forth at page 49 herein.
      12(b) Computation of Ratio of Consolidated  Earnings to Consolidated Fixed
            Charges for SPS is set forth at page 50 herein.

      15(a) Letter  from  Arthur  Andersen  LLP  regarding   unaudited   interim
            information is set forth at page 51 herein for NCE.
      15(b) Letter  from  Arthur  Andersen  LLP  regarding   unaudited   interim
            information is set forth at page 52 herein for PSCo.
      15(c) Letter  from  Arthur  Andersen  LLP  regarding   unaudited   interim
            information is set forth at page 53 herein for SPS.

      27(a)  Financial Data Schedule for NCE as of March  31, 1999.
      27(b)  Financial Data Schedule for PSCo as of March 31, 1999.
      27(c)  Financial Data Schedule for SPS as of March 31, 1999.

      99    Unaudited Pro Forma  Combined  Condensed  Financial  Information of
            New Century Energies, Inc. and Northern States Power Company.

* Previously filed as indicated and incorporated herein by reference.

                                       45
<PAGE>

 (b) Reports on Form 8-K

The  following  reports on Form 8-K were filed since the  beginning of the first
quarter of 1999:

- -     A  combined  report  on Form  8-K  dated  February  23,  1999,  was  filed
      separately  by NCE,  PSCo and SPS on February 23, 1999.
      The item reported was Item 5. Other Events:  Filing of audited  financial
      statements of NCE and its subsidiaries, PSCo and its subsidiaries and SPS
      for the year ended December 31, 1998.

- -     A report on Form 8-K dated February 25, 1999, was filed by SPS on February
      25, 1999. 
      The item reported was Item 5. Other Events: Filing of consent of Arthur
      Andersen LLP and Letter on unaudited financial information of Arthur 
      Andersen LLP.

- -     A report on Form 8-K dated February 25, 1999, was filed by SPS on March 9,
      1999.  
      The item reported was item 5. Other Events:  Filing of the Purchase
      Agreement,  the Indenture and the First Supplemental  Indenture related to
      the sale of Series A Senior Notes.

- -     A report on Form 8-K dated March 24, 1999, was filed by NCE on March 25, 
      1999.
      The item  reported was Item 5. Other Events: Filing of an Agreement
      and Plan of Merger dated March 24, 1999, between New Century Energies,Inc.
      and Northern States Power Company and a joint press release announcing the
      proposed merger.

- -     A report on Form 8-K dated March 26,  1999,  was filed by NCE on March 29,
      1999.
      The item  reported  was Item 5. Other  Events:  Filing of the slide
      presentation  for a joint meeting New Century Energies and Northern States
      Power Company held with financial analysts.


                                       46
<PAGE>


                           NEW CENTURY ENERGIES, INC.
                                    SIGNATURE

      Pursuant  to the  requirements  of Section  13 or 15(d) of the  Securities
Exchange Act of 1934, New Century Energies,  Inc. has duly caused this report to
be signed on its behalf by the  undersigned,  thereunto  duly  authorized on the
13th day of May, 1999.

                                          NEW CENTURY ENERGIES, INC.

                                          By     /s/ R. C. Kelly
                                          ---------------------------------
                                                   R. C. Kelly
                                          Executive Vice President and
                                             Chief Financial Officer


                       PUBLIC SERVICE COMPANY OF COLORADO
                                    SIGNATURE

      Pursuant  to the  requirements  of Section  13 or 15(d) of the  Securities
Exchange Act of 1934,  Public  Service  Company of Colorado has duly caused this
report to be signed on its behalf by the undersigned,  thereunto duly authorized
on the 13th day of May, 1999.


                                          PUBLIC SERVICE COMPANY OF COLORADO

                                          By   /s/Brian P. Jackson
                                          ---------------------------------
                                                Brian P. Jackson
                                          Senior Vice President, Finance and
                                            Administrative Services,
                                          Chief Financial Officer and
                                                    Treasurer



                       SOUTHWESTERN PUBLIC SERVICE COMPANY
                                    SIGNATURE

      Pursuant  to the  requirements  of Section  13 or 15(d) of the  Securities
Exchange Act of 1934,  Southwestern  Public Service Company has duly caused this
report to be signed on its behalf by the undersigned,  thereunto duly authorized
on the 13th day of May, 1999.


                                          SOUTHWESTERN PUBLIC SERVICE COMPANY

                                          By   /s/Brian P. Jackson
                                          ---------------------------------
                                                Brian P. Jackson
                                          Senior Vice President, Finance and
                                            Administrative Services,
                                          Chief Financial Officer and
                                                    Treasurer

                                       47
<PAGE>

                                  EXHIBIT INDEX

2(a)1* NCE/NSP  Agreement  and Plan of Merger dated March 24, 1999 (Form 8-K,
       March 24, 1999, Exhibit 2.1).

3(a)1* NCE Restated Articles of Incorporation dated December 8, 1995 
       (Form S-4, Exhibit 3(a)).

3(a)2* PSCO Amended and Restated  Articles of Incorporation dated July 10,
       1998 (Form 10-K, December 31, 1998, Exhibit 3(a)1).
      
3(a)3* SPS Amended and Restated Articles of Incorporation dated September
       30, 1997 (Form 10-K, December 31, 1997, Exhibit 3(a)2).

3(b)1* NCE Restated By-laws dated December 15, 1998 (Form 10-K, December 
       31, 1998, Exhibit 3(b)1).

3(b)2* PSCO By-laws dated November 20, 1997 (Form 10-K, December 31, 1997,
       Exhibit 3(b)1).

3(b)3* SPS By-laws dated September 29, 1997 (Form 10-K, December 31, 1997,
       Exhibit 3(b)2).

10(a) Senior Executive  Severance Policy,  effective March 24, 1999, between the
      Company and Senior Executives.

10(b) The employment agreement, dated March 24, 1999, among Northern States 
      Power Company., New Century Energies, Inc., and Wayne H. Brunetti.

12(a) Computation  of Ratio  of  Consolidated  Earnings  to  Consolidated  Fixed
      Charges for PSCo is set forth at page 49 herein.

12(b) Computation  of Ratio  of  Consolidated  Earnings  to  Consolidated  Fixed
      Charges for SPS is set forth at page 50 herein.

15(a) Letter from Arthur Andersen LLP regarding unaudited interim information is
      set forth at page 51 herein for NCE.

15(b) Letter from Arthur Andersen LLP regarding unaudited interim information is
      set forth at page 52 herein for PSCo.

15(c) Letter from Arthur Andersen LLP regarding unaudited interim information is
      set forth at page 53 herein for SPS.

27(a) Financial Data Schedule for NCE as of March 31, 1999.

27(b) Financial Data Schedule for PSCo as of March 31, 1999.

27(c) Financial Data Schedule for SPS as of March 31, 1999.

99    Unaudited Pro Forma Combined Condensed Financial Information of New
      Century Energies, Inc. and Northern States Power Company.

* Previously filed as indicated and incorporated herein by reference.

                                       48
<PAGE>


                                                                 EXHIBIT 12(a)

                       PUBLIC SERVICE COMPANY OF COLORADO
                                AND SUBSIDIARIES

                  COMPUTATION OF RATIO OF CONSOLIDATED EARNINGS
                          TO CONSOLIDATED FIXED CHARGES

            (not covered by Report of Independent Public Accountants)



                                                    Three Months Ended
                                                        March 31,
                                                      1999       1998 
                                                      ----       ---- 
                                           (Thousands of Dollars, except ratios)

Fixed charges:
   Interest on long-term debt...................     $ 28,800    $27,600
   Interest on borrowings against corporate-owned
      life insurance contracts..................       13,704     11,671
   Other interest...............................        5,220      5,653
   Amortization of debt discount and expense less
      premium ..................................        1,083        978
   Interest component of rental expense.........        2,339      2,061
   Dividends on PSCo obligated mandatorily 
      redeemable preferred securities...........        3,800          -
                                                      -------     ------

     Total .....................................     $ 54,946   $ 47,963
                                                     ========   ========

Earnings (before fixed charges and taxes on income):
   Net income...................................     $ 65,939   $ 68,897
   Fixed charges as above.......................       54,946     47,963
   Provisions for Federal and state taxes on income,
   net of investment tax credit amortization....       29,214     36,818
                                                       ------     ------

     Total......................................     $150,099   $153,678
                                                     ========   ========

Ratio of earnings to fixed charges..............         2.73       3.20
                                                       ======     ======


<PAGE>



                                                                 EXHIBIT 12(b)

                       SOUTHWESTERN PUBLIC SERVICE COMPANY
                                AND SUBSIDIARIES

                  COMPUTATION OF RATIO OF CONSOLIDATED EARNINGS
                          TO CONSOLIDATED FIXED CHARGES

                 (not covered by Report of Independent Public Accountants)



                                                    Three Months Ended
                                                        March 31,
                                                      1999       1998 
                                                      ----       ---- 
                                           (Thousands of Dollars, except ratios)

Fixed charges:
   Interest on long-term debt...................     $10,643    $10,943
   Other interest...............................       1,590      2,579
   Amortization of debt discount and expense less
      premium ..................................         552        561
   Interest component of rental expense.........         191        202
   Dividends on SPS obligated mandatorily redeemable
      preferred securities......................       1,963      1,963
                                                      ------     ------

     Total .....................................     $14,939    $16,248
                                                     =======    =======

Earnings (before fixed charges and taxes on income):
   Net income...................................     $23,391    $18,139
   Fixed charges as above.......................      14,939     16,248
   Provisions for Federal and state taxes on
      income, net of investment tax credit 
      amortization.... .........................      14,365     11,225
                                                      ------     ------

     Total......................................     $52,695    $45,612
                                                     =======    =======

Ratio of earnings to fixed charges..............        3.53       2.81
                                                      ======     ======


                                       50
<PAGE>



                                                                   EXHIBIT 15(a)

May 13, 1999


New Century Energies, Inc.:

      We are aware that New Century Energies, Inc. has incorporated by reference
in its Registration  Statement (Form S-8, File No. 333-28639)  pertaining to the
Omnibus  Incentive  Plan;  its  Registration   Statement  (Form  S-3,  File  No.
333-28637) pertaining to the Dividend Reinvestment and Cash Payment Plan and its
Registration Statements (Form S-3, File Nos. 333-40361 and 333-64067) pertaining
to the registration of NCE Common Stock;  its Registration  Statement (Form S-8,
File No.  333-58117)  pertaining  to the NCE  Employee  Investment  Plan and NCE
Employees'  Savings and Stock  Ownership  Plan and its Form 10-Q for the quarter
ended March 31, 1999, which includes our report dated May 13, 1999, covering the
unaudited   consolidated   condensed  financial  statements  contained  therein.
Pursuant  to  Regulation  C of the  Securities  Act of 1933,  that report is not
considered  a part of the  registration  statement  prepared or certified by our
Firm or a report  prepared  or  certified  by our Firm  within  the  meaning  of
Sections 7 and 11 of the Act.

                                                Very truly yours,



                                                ARTHUR ANDERSEN LLP



                                       51
<PAGE>


                                                                   EXHIBIT 15(b)

May 13, 1999


Public Service Company of Colorado:

      We are aware that Public Service  Company of Colorado has  incorporated by
reference in its Registration Statement (Form S-3, File No. 33-62233) pertaining
to the Automatic  Dividend  Reinvestment  and Common Stock  Purchase  Plan;  its
Registration  Statement (Form S-3, File No.  33-37431) as amended on December 4,
1990,  pertaining  to the  shelf  registration  of  Public  Service  Company  of
Colorado's First Mortgage Bonds; its Registration  Statement (Form S-8, File No.
33-55432)  pertaining to the Omnibus Incentive Plan; its Registration  Statement
(Form S-3, File No.  33-51167)  pertaining to the shelf  registration  of Public
Service Company of Colorado's  First  Collateral  Trust Bonds;  its Registration
Statement (Form S-3, File No. 33-54877)  pertaining to the shelf registration of
Public Service Company of Colorado's First Collateral Trust Bonds and Cumulative
Preferred  Stock and its Form 10-Q for the quarter  ended March 31, 1999,  which
includes  our report dated May 13, 1999,  covering  the  unaudited  consolidated
condensed financial  statements  contained therein.  Pursuant to Regulation C of
the  Securities  Act of  1933,  that  report  is not  considered  a part  of the
registration statement prepared or certified by our Firm or a report prepared or
certified by our Firm within the meaning of Sections 7 and 11 of the Act.

                                                        Very truly yours,



                                                        ARTHUR ANDERSEN LLP



                                       52
<PAGE>



                                                                   EXHIBIT 15(c)
May 13, 1999


Southwestern Public Service Company:

      We are aware that Southwestern  Public Service Company has incorporated by
reference  in  its  Registration   Statement  (Form  S-3,  File  No.  333-05199)
pertaining to  Southwestern  Public Service  Company's  Preferred Stock and Debt
Securities;  its Registration Statement (Form S-8, File No. 33-27452) pertaining
to  Southwestern  Public  Service  Company's  1989 Stock  Incentive Plan and its
Registration  Statement (Form S-8, File No. 33-57869) pertaining to Southwestern
Public Service  Company's  Employee  Investment  Plan and  Non-Qualified  Salary
Deferral  Plan and its Form 10-Q for the  quarter  ended March 31,  1998,  which
includes  our  report  dated May 13,  1999,  covering  the  unaudited  condensed
financial  statements  contained  therein.  Pursuant  to  Regulation  C  of  the
Securities Act of 1933, that report is not considered a part of the registration
statement prepared or certified by our Firm or a report prepared or certified by
our Firm within the meaning of Sections 7 and 11 of the Act.


                                                        Very truly yours,



                                                        ARTHUR ANDERSEN LLP

                                       53
<PAGE>


                                                                      EXHIBIT 99

                UNAUDITED PROFORMA COMBINED CONDENSED FINANCIAL INFORMATION

     The following unaudited pro forma combined condensed balance sheet at March
31, 1999 gives  effect to the NCE/NSP  Merger as if it had occurred at March 31,
1999.  The unaudited pro forma combined  condensed  statements of income for the
three  months  ended  March 31, 1999 and 1998 and for each of the three years in
the period ended  December  31, 1998 give effect to the NCE/NSP  Merger as if it
had occurred on January 1, 1996.  These  statements are prepared on the basis of
accounting as required  under a pooling of interests and do not reflect any cost
savings   anticipated  by  Management  as  a  result  of  the  NCE/NSP   Merger.
Accordingly,  the pro forma  information  is not  necessarily  indicative of the
financial  position or results of  operations  that would have  occurred had the
NCE/NSP  Merger been  consummated  for the periods for which it is given effect,
nor is it  necessarily  indicative  of future  operating  results  or  financial
condition.



                                       54
<PAGE>


           Unaudited Pro Forma Combined Condensed Statement of Income
                   Reflecting Completion of the NCE/NSP Merger
                        Three Months ended March 31, 1999
                  (Thousands of Dollars, Except per Share Data)

<TABLE>
<CAPTION>

                                        Northern      New Century     Reporting
                                      States Power      Energies     Adjustments     Pro Forma      Pro Forma
                                     (as Reported)   (as Reported)    (Note 2)      Adjustments     Combined  
                                     -------------   -------------    --------      -----------     --------  

<S>                                     <C>            <C>            <C>            <C>            <C>
Operating revenues:
   Electric.................            $556,856       $628,706       $(14,011)      $              $1,171,551
   Gas......................             186,327        347,688        (88,304)                        445,711
   Nonregulated and other revenues             -         15,029        164,750                         179,779
   Earnings from equity investments            -              -         23,842                          23,842
                                          ------          -----        -------       ------             ------
     Total operating revenues             743,183       991,423         86,277                       1,820,883

Operating expenses:
   Electric fuel and purchased power      168,028       295,269        (13,627)                        449,670
   Cost of gas sold and transported       112,178       261,631        (83,495)                        290,314
   Other operation and maintenance        193,918       150,109        (20,683)                        323,344
   Depreciation and amortization           87,485        69,502         (2,124)                        154,863
   Taxes other than income taxes           57,632        37,620           (592)                         94,660
   Income taxes - utility...               36,288             -        (36,288)                              -
   Nonregulated operating expenses              -             -        199,147                         199,147
                                           ------       -------        -------       ------            -------
     Total operating expenses             655,529       814,131         42,338                       1,511,998

Operating income............               87,654       177,292         43,939                         308,885

Other income (expense):
   Income from nonregulated businesses
    before interest and taxes......        (7,353)            -          7,353                               -
   Equity earnings from unconsolidated
    subsidiaries............                    -        15,811        (15,811)                              -
   Other income (deductions) - net         (1,836)       (3,542)           807                          (4,571)
   Income taxes on nonregulated and 
    nonoperating items - benefit......     16,142             -        (16,142)                              -
                                         --------        ------        -------       -------            ------
     Total other income (expense)          6,953         12,269        (23,793)                         (4,571)

Financing costs
   Interest charges.........              38,348         45,383              -                          83,731
   Distributions on mandatorily 
    redeemable preferred securities
    of subsidiary trusts .............     3,938          5,763              -                           9,701
                                           -----          -----          ------      ------              -----

     Total financing costs............    42,286         51,146              -                          93,432

Income before income taxes............    52,321        138,415          20,146                        210,882
Income taxes..........................         -         37,115          20,146                         57,261
                                          ------         ------         -------      -------            ------
Net income............................    52,321        101,300               -                        153,621
Preferred dividends & redemption 
  premiums of NSP.....................     1,060              -               -                          1,060
                                          ------         ------         -------      -------             -----
Earnings available for common
  shareholders .......................   $51,261       $101,300         $     -      $     -        $  152,561
                                         =======       ========         =======      =======        ==========

Average common shares outstanding
  (Note 1) ...........................   152,392        114,681                       63,075           330,148         
Average common and potentially diluted
  shares outstanding (Note 1)........    152,553        114,743                       63,109           330,405

Basic and diluted earnings per share       $0.34          $0.88                                          $0.46  
                                           =====          =====                                          =====
</TABLE>


                 See accompanying notes to Unaudited Pro Forma
                    Combined Condensed Financial Statements.

                                       55
<PAGE>


                 Unaudited Pro Forma Combined Condensed Statement of Income
                   Reflecting Completion of the NCE/NSP Merger
                        Three Months ended March 31, 1998
                  (Thousands of Dollars, Except per Share Data)


<TABLE>
<CAPTION>

                                        Northern      New Century     Reporting
                                      States Power      Energies     Adjustments     Pro Forma      Pro Forma
                                     (as Reported)   (as Reported)    (Note 2)      Adjustments     Combined  
                                     -------------   -------------    --------      -----------     --------  

<S>                                     <C>            <C>            <C>            <C>            <C>
Operating revenues:
   Electric.........................     $521,571      $599,988       $(15,364)      $             $1,106,195
   Gas..............................      179,831       319,707        (48,476)                       451,062
   Nonregulated and other revenues .            -        19,809        106,463                        126,272
   Earnings from equity investments             -             -         19,080                         19,080                    
                                           ------       -------        -------       ------            ------
     Total operating revenues             701,402       939,504         61,703                      1,702,609

Operating expenses:
   Electric fuel and purchased power      148,162       289,783        (15,142)                       422,803
   Cost of gas sold and transported       113,582       224,912        (43,348)                       295,146
   Other operation and maintenance .      189,990       147,681        (18,076)                       319,595
   Depreciation and amortization ...       84,100        62,418         (1,466)                       145,052
   Taxes other than income taxes ...       55,960        32,873           (595)                        88,238
   Income taxes - utility...........       30,558             -        (30,558)                             -
   Nonregulated operating expenses              -             -        131,413                        131,143               
                                           ------       -------        -------       ------           -------
     Total operating expenses             622,352       757,667         22,228                      1,402,247

Operating income.....................      79,050       181,837         39,475                        300,362

Other income (expense):
   Income from nonregulated businesses
    before interest and taxes.........      4,380             -         (4,380)                             -
   Equity earnings from unconsolidated
    subsidiaries......................          -         3,752         (3,752)                             -
   Other income (deductions) - net ...      2,450        (2,968)          (785)                        (1,303)
   Income taxes on nonregulated and
    nonoperating items - benefit......     14,026             -        (14,026)                             -
                                           ------        ------        -------       -------           ------
     Total other income (expense)          20,856           784        (22,943)                        (1,303)

Financing costs:
   Interest charges....................    38,851        44,461              -                         83,312
   Distributions on mandatorily 
    redeemable preferred securities
    of subsidiary trusts ..............     3,938         1,963              -                          5,901
   Dividends & redemption premiums on 
    preferred stock of subsidiaries....         -         2,929              -                          2,929
                                           ------        ------        -------       -------           ------
     Total financing costs............     42,789        49,353              -                         92,142

Income before income taxes............     57,117       133,268         16,532                        206,917
Income taxes..........................          -        47,119         16,532                         63,651
                                           ------        ------        -------       -------           ------
Net income............................     57,117        86,149              -                        143,266
Preferred dividends & redemption 
  premiums of NSP.....................      2,367             -              -                          2,367
                                            -----        ------        -------       -------            -----
Earnings available for common
  shareholders .......................    $54,750       $86,149        $     -       $     -         $140,889
                                          =======       =======        =======       =======         ========

Average common shares outstanding
 (Note 1) .............................   149,214       110,973                       61,035          321,222
Average common and potentially diluted
 shares outstanding (Note 1)...........   149,467       111,134                       61,124          321,725

Basic and diluted earnings per share ..     $0.37         $0.78                                         $0.44
                                            =====         =====                                         =====
</TABLE>


                 See accompanying notes to Unaudited Pro Forma
                    Combined Condensed Financial Statements.

                                       56
<PAGE>


           Unaudited Pro Forma Combined Condensed Statement of Income
                   Reflecting Completion of the NCE/NSP Merger
                          Year ended December 31, 1998
                  (Thousands of Dollars, Except per Share Data)
<TABLE>
<CAPTION>
                                        Northern      New Century     Reporting
                                      States Power      Energies     Adjustments     Pro Forma      Pro Forma
                                     (as Reported)   (as Reported)    (Note 2)      Adjustments     Combined  
                                     -------------   -------------    --------      -----------     --------  
<S>                                     <C>            <C>            <C>            <C>            <C>
Operating revenues:
   Electric........................     $2,362,351      $2,697,486    $  (74,518)    $              $4,985,319
   Gas.............................        456,823         841,276      (188,095)                    1,110,004
   Nonregulated and other revenues               -          72,143       444,843                       516,986
   Earnings from equity investments              -               -       115,985                       115,985
                                            ------         -------       -------     -------           -------

     Total operating revenues            2,819,174       3,610,905       298,215                     6,728,294

Operating expenses:
   Electric fuel and purchased power       689,275       1,357,198       (72,709)                    1,973,764
   Cost of gas sold and transported .      267,050         562,583      (170,140)                      659,493
   Other operation and maintenance ..      794,332         637,743       (90,607)                    1,341,468
   Depreciation and amortization ....      338,225         268,743        (8,055)                      598,913
   Taxes other than income taxes ....      220,620         134,137        (2,175)                      352,582
   Income taxes - utility............      145,383               -      (145,383)                            -
   Nonregulated operating expenses               -               -       592,106                       592,106
                                           -------       ---------       -------     -------           -------
     Total operating expenses            2,454,885       2,960,404       103,037                     5,518,326

Operating income.....................      364,289         650,501       195,178                     1,209,968

Other income (expense):
   Income from nonregulated businesses
    before interest and taxes.........      51,171               -       (51,171)                            -
   Equity earnings from unconsolidated
    subsidiaries......................           -          36,101       (36,101)                            -
   Other income (deductions) - net           4,812          (4,250)       37,477                        38,039
   Income taxes on nonregulated and
    nonoperating items - benefit......      40,588               -       (40,588)                            -
                                            ------          ------       -------     -------            ------
     Total other income (expense)           96,571          31,851       (90,383)                       38,039

Financing costs:
   Interest charges...................     162,737         181,906             -                       344,643
   Distributions on mandatorily
    redeemable preferred securities
    of subsidiary trusts .............      15,750          17,561             -                        33,311
   Dividends & redemption premiums on 
    preferred stock of subsidiaries...           -           5,332             -                         5,332
                                            ------          ------       -------     -------            ------
     Total financing costs............     178,487         204,799             -                       383,286

Income before income taxes............     282,373         477,553       104,795                       864,721
Income taxes..........................           -         135,596       104,795                       240,391
                                          --------         -------       -------     -------           -------
Net income............................     282,373         341,957             -                       624,330
Preferred dividends & redemption 
  premiums of NSP.....................       5,548               -             -                         5,548
                                          --------          ------       -------     -------            ------
Earnings available for common 
  shareholders .......................   $ 276,825        $341,957       $    -      $     -        $  618,782
                                         =========        ========       =======     =======        ==========

Average common shares outstanding
 (Note 1) ............................     150,502         111,859                    61,522           323,883
Average common and potentially 
  diluted shares outstanding (Note 1).     150,743         112,008                    61,604           324,355

Basic earnings per share..............       $1.84           $3.06                                       $1.91
                                             =====           =====                                       =====
Diluted earnings per share............       $1.84           $3.05                                       $1.91
                                             =====           =====                                       =====
</TABLE>

                 See accompanying notes to Unaudited Pro Forma
                    Combined Condensed Financial Statements.
                                       57
<PAGE>


                 Unaudited Pro Forma Combined Condensed Statement of Income
                   Reflecting Completion of the NCE/NSP Merger
                          Year ended December 31, 1997
                  (Thousands of Dollars, Except per Share Data)
<TABLE>
<CAPTION>
                                        Northern      New Century     Reporting
                                      States Power      Energies     Adjustments     Pro Forma      Pro Forma
                                     (as Reported)   (as Reported)    (Note 2)      Adjustments     Combined  
                                     -------------   -------------    --------      -----------     --------  
<S>                                     <C>            <C>            <C>            <C>            <C>
Operating revenues:
   Electric.................            $2,218,550     $2,473,359     $   (22,861)  $               $4,669,048
   Gas......................               515,196        816,596        (179,257)                   1,152,535
   Nonregulated and other revenues               -         52,570         425,689                      478,259
   Earnings from equity investments              -              -          52,766                       52,766
                                            ------        -------         -------    ------             ------
     Total operating revenues            2,733,746      3,342,525         276,337                    6,352,608

Operating expenses:
   Electric fuel and purchased power       596,238      1,203,292         (21,938)                   1,777,592
   Cost of gas sold and transported .      331,296        543,291        (167,902)                     706,685
   Other operation and maintenance ..      745,828        594,359         (57,268)                   1,282,919
   Depreciation and amortization ....      325,880        243,078          (9,414)                     559,544
   Taxes other than income taxes ....      227,893        129,280          (2,007)                     355,166
   Income taxes - utility... ........      144,855              -        (144,855)                           -
   Nonregulated operating expenses ..            -              -         525,668                      525,668
                                            ------          -----         -------     -----             ------
     Total operating expenses            2,371,990      2,713,300         122,284                    5,207,574

Operating income.....................      361,756        629,225         154,053                    1,145,034

Other income (expense):
   Income from nonregulated businesses
    before interest and taxes........       12,078              -         (12,078)                           -
   Equity earnings from unconsolidated
    subsidiaries.....................            -         34,166         (34,166)                           -
   Merger costs......................      (29,005)       (34,088)              -                      (63,093)
   Other income (deductions)                 3,515        (27,267)         37,046                       13,294
   Income taxes on nonregulated 
     and nonoperating items - benefit..     48,145              -         (48,145)                           -
                                          --------         ------         -------    ------             ------
     Total other income (expense)           34,733        (27,189)        (57,343)                     (49,799)

Financing costs:
   Interest charges..................      144,732        187,028               -                      331,760
   Distributions on mandatorily 
    redeemable preferred securities 
    of subsidiary trusts ............       14,437          7,850               -                       22,287
   Dividends & redemption premiums 
    on preferred stock of subsidiaries           -         11,752               -                       11,752
                                          --------         ------         -------   -------             ------
     Total financing costs...........      159,169        206,630               -                      365,799

Income before income taxes and 
  extraordinary item ................      237,320        395,406          96,710                      729,436
Income taxes.........................            -        133,919          96,710                      230,629
                                          --------        -------         -------   -------            -------
Income before extraordinary item ....      237,320        261,487               -                      498,807
Extraordinary item - U.K.windfall tax            -       (110,565)              -                     (110,565)     
                                            ------       --------         -------   -------             ------
Net income...........................      237,320        150,922               -                      388,242
Preferred dividends & redemption
  premiums of NSP....................       11,071              -               -                       11,071
                                          --------         ------         -------   -------             ------
Earnings available for common 
  shareholders ......................     $226,249       $150,922         $     -   $     -         $  377,171    
                                          ========       ========         =======   =======         ==========


Average common shares outstanding
 (Note 1) ...........................      140,594        104,805                    57,643            303,042
Average common and potentially 
  diluted shares outstanding (Note 1)      140,870        104,872                    57,680            303,422

Earnings per share - basic and diluted:
   Income before extraordinary item          $1.61         $2.50                                         $1.61
   Extraordinary item................            -         (1.06)                                        (0.37)
                                               ---         -----                                         -----
    Total............................        $1.61         $1.44                                         $1.24
                                              ====         =====                                         =====
</TABLE>
                 See accompanying notes to Unaudited Pro Forma
                    Combined Condensed Financial Statements.
                                       58

<PAGE>

                 Unaudited Pro Forma Combined Condensed Statement of Income
                   Reflecting Completion of the NCE/NSP Merger
                          Year ended December 31, 1996
                  (Thousands of Dollars, Except per Share Data)

<TABLE>
<CAPTION>
                                        Northern      New Century     Reporting
                                      States Power      Energies     Adjustments     Pro Forma      Pro Forma
                                     (as Reported)   (as Reported)    (Note 2)      Adjustments     Combined  
                                     -------------   -------------    --------      -----------     --------  
<S>                                     <C>            <C>            <C>            <C>            <C>
Operating revenues:
   Electric.......................      $2,127,413     $2,416,539     $ (7,806)      $              $4,536,146
   Gas............................         526,793        640,497      (68,880)                      1,098,410
   Nonregulated and other revenues               -         39,998      380,589                         420,587
   Earnings from equity investments              -              -       31,057                          31,057
                                            ------        -------      -------        ------            ------

     Total operating revenues .....      2,654,206      3,097,034      334,960                       6,086,200

Operating expenses:
   Electric fuel and purchased power       544,763      1,145,862       (7,649)                      1,682,976
   Cost of gas sold and transported        335,453        393,163      (61,257)                        667,359
   Other operation and maintenance         707,280        568,581      (35,389)                      1,240,472
   Depreciation and amortization           306,432        224,865       (7,561)                        523,736
   Taxes other than income taxes           232,824        128,980       (1,429)                        360,375
   Income taxes - utility..........        161,410              -     (161,410)                              -
   Nonregulated operating expenses               -              -      455,163                         455,163     
                                            ------       --------      -------        ------            ------

     Total operating expenses .....      2,288,162      2,461,451      180,468                       4,930,081

Operating income...................        366,044        635,583      154,492                       1,156,119

Other income (expense):
   Income from nonregulated businesses
    before interest and taxes......         18,543              -      (18,543)                              -
   Equity earnings from unconsolidated
    subsidiaries...................              -            389         (389)                              -
   Merger costs....................              -        (21,107)           -                         (21,107)
   Other income (deductions) - net           6,051        (13,775)      25,850                          18,126
   Income taxes on nonregulated and 
    nonoperating items - benefit....        14,600              -      (14,600)                              -
                                            ------         ------       -------       ------             ------
     Total other income (expense)           39,194        (34,493)      (7,682)                         (2,981)

Financing costs:
   Interest charges.................       130,699        161,601            -                          292,300
   Distributions on mandatorily 
    redeemable preferred securities
    of subsidiary trusts ............            -          1,526            -                            1,526
   Dividends & redemption premiums 
    on preferred stock of subsidiaries           -         11,969            -                           11,969
                                          --------         ------      -------       -------             ------
     Total financing costs..........       130,699        175,096            -                          305,795

Income before income taxes..........       274,539        425,994      146,810                          847,343
Income taxes........................             -        153,653      146,810                          300,463
                                          --------        -------      -------       -------            -------
Net income..........................       274,539        272,341            -                          546,880
Preferred dividends & redemption 
  premiums of NSP...................        12,245              -            -                           12,245
                                          --------        -------      -------       -------             ------
Earnings available for common 
  shareholders .....................      $262,294       $272,341     $      -       $     -          $ 534,635
                                          ========       ========     ========       =======          =========


Average common shares outstanding
  (Note 1) .........................       137,121        103,059                     56,682            296,862
Average common and potentially 
  diluted shares outstanding (Note 1)      137,358        103,102                     56,706            297,166

Basic and diluted earnings per share         $1.91          $2.64                                         $1.80
                                             =====          =====                                         =====
</TABLE>
                 See accompanying notes to Unaudited Pro Forma
                    Combined Condensed Financial Statements.
                                       59
<PAGE>

              Unaudited Pro Forma Combined Condensed Balance Sheet
                   Reflecting Completion of the NCE/NSP Merger
                                 March 31, 1999
                             (Thousands of Dollars)
<TABLE>
<CAPTION>
                                        Northern      New Century     Reporting
                                      States Power      Energies     Adjustments     Pro Forma      Pro Forma
                                     (as Reported)   (as Reported)    (Note 2)      Adjustments     Combined  
                                     -------------   -------------    --------      -----------     --------  
<S>                                     <C>            <C>            <C>            <C>            <C>
      ASSETS
Property, plant and equipment:
   Electric.....................         $7,258,627     $7,116,116      $ (121,849)  $              $14,252,894
   Gas..........................            885,730      1,220,178          (7,709)                   2,098,199
   Other........................            370,401      1,003,126         542,316                    1,915,843
                                           --------     ----------         -------   -------         ----------
    Total property, plant and 
     equipment .................          8,514,758      9,339,420         412,758                   18,266,936
   Accumulated provision for
     depreciation ..............         (4,236,127)    (3,410,190)       (127,511)                  (7,773,828)
   Nuclear fuel - net...........            103,510              -                                      103,510
                                           --------         ------         -------   -------            -------
    Net property, plant and equipment     4,382,141      5,929,230         285,247                   10,596,618

Current assets:
   Cash and cash equivalents .....           58,280         84,817                                      143,097
   Accounts receivable - net .....          326,174        323,767                                      649,941
   Accrued unbilled utility 
     revenues ....................          102,585        113,400                                      215,985
   Fuel and gas inventories.......           45,306         58,869                                      104,175
   Material and supplies inventories        112,455         70,552                                      183,007
   Prepayments and other..........           49,219        105,822                                      155,041
                                            -------        -------         -------   -------            -------
    Total current assets..........          694,019        757,227                                    1,451,246

Other assets:
   Equity investments.............          874,414        347,911                                    1,222,325
   External decommissioning fund
    and other investments.........          503,400         71,152                                      574,552
   Regulatory assets..............          311,694        375,476                                      687,170
   Non-regulated property - net ..          285,247              -        (285,247)                           -
   Other........................            328,462        213,396               -                      541,858
                                           --------        -------         -------   -------            -------
    Total other assets............        2,303,217      1,007,935        (285,247)                   3,025,905
                                          ---------      ---------         --------  -------          ---------

Total assets......................       $7,379,377     $7,694,392        $      -   $     -        $15,073,769     
                                         ==========     ==========        =========  =======        ===========

      LIABILITIES AND EQUITY
Capitalization:
   Common stock (Note 1)..........       $  382,985     $  114,925        $          $330,409       $   828,319
   Other stockholders' equity (Note 1)    2,113,171      2,541,922                   (330,409)        4,324,684
                                          ---------      ---------          -------   -------       -----------
    Total common stockholders equity      2,496,156      2,656,847                          -         5,153,003
   Preferred stockholders' equity           105,340              -                                      105,340
   Mandatorily redeemable preferred 
    securities of subsidiary trusts         200,000        294,000                                      494,000
   Long-term debt.................        1,844,071      2,304,985                                    4,149,056
                                          ---------      ---------          -------   -------         ---------
    Total capitalization..........        4,645,567      5,255,832                                    9,901,399

Current liabilities:
   Current portion of long-term debt        168,731        124,477                                      293,208
   Short-term debt................          369,632        408,900                                      778,532
   Accounts payable...............          256,839        255,555                                      512,394
   Taxes accrued..................          226,497        133,954                                      360,451
   Other accrued liabilities .....          166,364        284,176                                      450,540
                                            -------        -------          -------   -------           -------
    Total current liabilities             1,188,063      1,207,062                                    2,395,125

Other liabilities:
   Deferred income taxes..........          814,355        954,295                                    1,768,650
   Deferred investment tax credits          125,993         99,650                                      225,643
   Regulatory liabilities.........          392,285              -                                      392,285
   Other..........................          213,114        177,553                                      390,667
                                           --------       --------          -------   -------           -------
    Total other liabilities.......        1,545,747      1,231,498                                    2,777,245
                                          ---------      ---------          -------   -------         ---------

Total liabilities and equity             $7,379,377     $7,694,392          $     -   $     -       $15,073,769  
                                         ==========     ==========          =======   =======       ===========
</TABLE>
                 See accompanying notes to Unaudited Pro Forma
                    Combined Condensed Financial Statements.
                                       60
<PAGE>
<PAGE>


      Notes to Unaudited Pro Forma Combined Condensed Financial Statements

1. The unaudited pro forma combined condensed  financial  statements reflect the
   conversion of each share of NCE common stock, par value $1.00 per share, into
   1.55 share of common stock of the combined  company and the  continuation  of
   each share of NSP common  stock,  par value $2.50 per share,  as one share of
   common stock of the combined  company  ($2.50 par value),  as provided in the
   NCE/NSP  Merger  Agreement.   The  unaudited  pro  forma  combined  condensed
   financial  statements are presented as if the companies were combined  during
   all periods included therein.

2. The unaudited pro forma combined  condensed income statements reflect certain
   reclassifications  to conform the  presentation of operating  results.  These
   reporting  adjustments  include:  (a) separate  presentation  of nonregulated
   revenues and equity earnings in operating revenues; (b) separate presentation
   of all nonregulated  expenses,  including project  write-downs,  in operating
   expenses;  (c)  presentation  of  nonregulated  interest  and  other  income,
   including  gains for project sales,  in other income  (deductions) - net; and
   (d) presentation of all income taxes (regulated and nonregulated) on a single
   line before arriving at net income.

3. The unaudited pro forma combined  condensed balance sheet at March 31, 1999
   reflects  reporting   adjustments  to  conform  the  presentation  of:  (a)
   investments  and  deferred  charges  (in other  assets);  (b)  nonregulated
   property (in property,  plant and equipment);  and (c) construction work in
   progress (in other property, plant and equipment).

4. The  allocation of the estimated  costs savings  resulting from the merger to
   NCE,  NSP and their  customers,  net of the costs  incurred  to achieve  such
   savings,  will be subject to regulatory review and approval.  At the time the
   merger  agreement  was signed,  cost savings  resulting  from the merger were
   estimated to be  approximately  $1.1 billion over a ten-year  period,  net of
   transaction  costs  (including  fees  for  financial   advisors,   attorneys,
   accountants,  filings and  printing) and net of costs to achieve the savings.
   None of the estimated cost savings, the costs to achieve such savings, or the
   transaction  costs  have  been  reflected  as  pro forma adjustments  in  the
   unaudited  pro  forma  combined  financial  statements.   Nonrecurring  costs
   directly attributable to the merger are expected to be deferred and amortized
   to expense in periods subsequent to the consummation of the merger consistent
   with the anticipated recovery in rates. Accordingly, no pro forma adjustments
   have been made to retained earnings.

5. Intercompany   transactions   (including   purchased  and   exchanged   power
   transactions)  between  NCE and NSP during  the  periods  presented  were not
   material and,  accordingly,  no pro forma  adjustments were made to eliminate
   such transactions.

                                       61
<PAGE>
                                                                   EXHIBIT 10(a)

                      THE NCE 1999 SENIOR EXECUTIVE SEVERANCE POLICY

                                  Introduction


            Northern States Power Company, a Minnesota  corporation  ("NSP") and
New Century Energies,  Inc., a Delaware corporation ("NCE") have entered into an
Agreement  and  Plan  of  Merger  dated  as  of  March  24,  1999  (the  "Merger
Agreement"),   whereby  the  NSP  and  NCE   organizations   will  engage  in  a
merger-of-equals transaction (the "Combination").  The Board of Directors of NCE
recognizes that the pendency of the Combination,  and the inevitable adjustments
that will occur during the  transition  period  following the  Combination,  may
result  in the loss or  distraction  of  employees  of the  Corporation  and its
Subsidiaries to the detriment of the Corporation and its shareholders.

            The Board considers the avoidance of such loss and distraction to be
essential to protecting and enhancing the best interests of the  Corporation and
its  shareholders.  The Board also  believes  that  during the  pendency  of the
Combination and the transition  period  thereafter,  the Board should be able to
receive and rely on  disinterested  service from employees  without concern that
employees might be distracted or concerned by personal uncertainties and risks.

            In  addition,  the Board  believes  that it is  consistent  with the
Corporation's employment practices and policies and in the best interests of the
Corporation and its  shareholders to treat fairly its employees whose employment
terminates in connection with or following the Combination.

            Accordingly,  the Board has determined that appropriate steps should
be taken to assure the Corporation of the continued employment and attention and
dedication to duty of its employees  and to seek to ensure the  availability  of
their continued service, notwithstanding the Combination.

            Therefore,  in order to fulfill the above  purposes,  the  following
plan has been developed and is hereby adopted.


                                    ARTICLE I
                              ESTABLISHMENT OF PLAN


            As of  the  Effective  Date,  the  Corporation  hereby  establishes,
subject to Section 7.4 hereof, a separation  compensation  plan known as the NCE
1999 Senior Executive Severance Policy, as set forth in this document.




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                                   ARTICLE II
                                   DEFINITIONS


            As used  herein  the  following  words and  phrases  shall  have the
following respective meanings unless the context clearly indicates otherwise.

                  (a) Annual  Incentive  Award. The highest amount a Participant
received as an annual cash  incentive  award in any of the three  calendar years
prior to a termination of employment  entitling the  Participant to a Separation
Benefit.

                  (b) Annual  Salary.  The  Participant's  regular  annual  base
salary  immediately  prior to his or her  termination of  employment,  including
compensation  converted  to other  benefits  under a  flexible  pay  arrangement
maintained  by the  Corporation  or  deferred  pursuant  to a  written  plan  or
agreement with the Corporation, but excluding overtime pay, allowances,  premium
pay,  compensation paid or payable under any Corporation long-term or short-term
incentive plan or any similar payment.

                  (c) Board. The Board of Directors of NCE.

                  (d) Code.  The Internal Revenue Code of 1986, as amended from 
time to time.

                  (e) Committee. The Compensation Committee of the Board.

                  (f) Corporation. NCE and any successor thereto.

                  (g) Date of the Combination. The Effective Time, as defined in
the Merger Agreement.

                  (h)  Date of  Termination.  The  date on  which a  Participant
ceases to be an Employee.

                  (i) Effective Date. The date of the Merger Agreement.

                  (j) Employee. Any full-time,  regular-benefit,  non-bargaining
employee of an  Employer.  The term shall  exclude all  individuals  employed as
independent   contractors,   temporary   employees,   other  benefit  employees,
non-benefit employees,  leased employees,  even if it is subsequently determined
that such classification is incorrect.

                  (k)  Employer.  The  Corporation  or a  Subsidiary  which  has
adopted the Plan pursuant to Article V hereof.

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                  (l) Long-Term  Incentive Award. For Stock Awards,  the highest
aggregate Value granted (or deemed to have been granted as determined  under the
definition of Value) to a  Participant  during any of the three  calendar  years
prior to a termination of employment  entitling the  Participant to a Separation
Benefit.  For Non-Stock  Awards,  the highest target  opportunity  for any cycle
which begins  during the 36 month period prior to a  termination  of  employment
entitling the Participant to a Separation Benefit.

                  (m)  Multiple.  For each  Participant,  the  number  set forth
opposite the Participant's name on Schedule 1 hereto.

                  (n) Non-Stock Award. The opportunity to receive a cash payment
under  the  "value  creation  plan"  component  of the  Corporation's  long-term
incentive  program,  which long-term  incentive program is incorporated into the
Corporation's omnibus incentive plan.

                  (o)  Participant.  An  individual  who is  designated  as such
pursuant to Section 3.1.

                  (p) Plan. The NCE 1999 Senior Executive Severance Policy.

                  (q) Release Agreement.  An agreement substantially in the form
set forth in Exhibit A to this Plan,  with such  amendments as the Committee may
determine  to be necessary  in order for such  agreement  to  constitute a valid
release by the Participant in question of all claims described therein.

                  (r) Separation  Benefits.  The payments and benefits described
in Section 4.3 that are provided to qualifying Participants under the Plan.

                  (s) Separation Period. The period beginning on a Participant's
Date of Termination and ending upon expiration of a number of years equal to the
Participant's Multiple.

                  (t) Stock Award. An award of stock options, stock appreciation
rights (other than in conjunction  with a stock option) or restricted stock or a
performance award, in each case granted pursuant to the Corporation's  long-term
incentive program incorporated into the Corporation's  omnibus incentive plan or
any predecessor, successor or similar plan of the Corporation.

                  (u)  Subsidiary.  Any  corporation  in which the  Corporation,
directly  or  indirectly,   holds  a  majority  of  the  voting  power  of  such
corporation's outstanding shares of capital stock.

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                  (v) Target Annual  Incentive.  The Annual Incentive Award that
the  Participant  would have  received  for the year in which his or her Date of
Termination occurs, if the target goals had been achieved.

                  (w)  Value.  The Value of a Stock  Award  shall be the  dollar
value of such award at the time of grant,  as  determined  by the  Committee  in
connection  with the grant of such Stock  Award;  it being  understood  that the
Committee's  practice,  as of the date of adoption of this Plan, is to determine
(i) the value of a Stock Award that is a stock option,  stock appreciation right
or similar  right that derives its value from the  appreciation  of the value of
equity securities using a modified version of the Black-Scholes option valuation
method;  provided,  however,  that the value of stock  options shall be prorated
over the  period of time the grant was  intended  to cover and the grant will be
deemed to have been made  proportionately  in each calender year of such period,
and (ii) the value of other Stock Awards based upon the fair market value of the
underlying equity securities.


                                   ARTICLE III
                                   ELIGIBILITY

            3.1  Participation.  Each of the  individuals  named on  Schedule  1
hereto  shall be a  Participant  in the Plan.  Schedule  1 may be amended by the
Board from time to time to add individuals as Participants.

            3.2 Duration of Participation.  A Participant shall only cease to be
a Participant in the Plan as a result of an amendment or termination of the Plan
complying  with Article VII of the Plan,  or when he ceases to be an Employee of
any Employer,  unless, at the time he ceases to be an Employee, such Participant
is entitled to payment of a Separation  Benefit as provided in the Plan or there
has been an event or occurrence  described in Section  4.2(a) which would enable
the Participant to terminate his employment and receive a Separation  Benefit. A
Participant  entitled to payment of a  Separation  Benefit or any other  amounts
under the Plan shall remain a  Participant  in the Plan until the full amount of
the  Separation  Benefit and any other amounts  payable under the Plan have been
paid to the Participant.


                                   ARTICLE IV
                               SEPARATION BENEFITS


            4.1 Right to Separation  Benefit. A Participant shall be entitled to
receive  Separation  Benefits in accordance  with Section 4.3 if the Participant
ceases to be an Employee for any reason specified in Section 4.2(a).

            4.2   Termination of Employment.


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                  (a) Terminations Which Give Rise to Separation  Benefits Under
This Plan.  Except as set forth in subsection (b) below, a Participant  shall be
entitled to Separation  Benefits if, at any time before the third anniversary of
the Date of the Combination:

                         (i) the Participant  ceases to be an Employee by action
                  of  the  Employer  or any of  its  affiliates  (excluding  any
                  transfer to another Employer);

                         (ii) the  Participant's  Annual Salary is reduced below
                  the higher of (x) the amount in effect on the  Effective  Date
                  and (y) the highest  amount in effect at any time  thereafter,
                  and the Participant ceases to be an Employee by his or her own
                  action within 130 days after the occurrence of such reduction;

                         (iii) the Participant's duties and responsibilities are
                  materially  and  adversely  diminished  in  comparison  to the
                  duties and responsibilities  enjoyed by the Participant on the
                  Effective Date, and the  Participant  ceases to be an Employee
                  by his or her own action within 130 days after the  occurrence
                  after such reduction;

                         (iv)  the  program  of   incentive   compensation   and
                  retirement  and welfare  benefits  offered to the  Participant
                  (determined  in the  aggregate)  is  materially  and adversely
                  diminished in comparison to the program of benefits enjoyed by
                  the  Participant on the Effective  Date,  and the  Participant
                  ceases to be an Employee  by his or her own action  within 130
                  days after the occurrence after such reduction; or

                         (v) an Employer or any  affiliate of an Employer  sells
                  or otherwise distributes or disposes of the subsidiary, branch
                  or other business unit in which the  Participant  was employed
                  before  such  sale,   distribution   or  disposition  and  the
                  requirements of subsection (b)(iv) of this Section 4.2 are not
                  met,  and the  Participant  ceases to be an  Employee  upon or
                  within 130 days after such sale, distribution or disposition.

With respect to a termination by the Participant pursuant to clause (ii), (iii),
(iv), or (v) of this Section 4.2(a),  such termination shall be effective if and
only if the  Participant  has given written notice to his or her Employer of his
or her intent to terminate for such reason (stating the event(s) relied upon for
such  termination  and the provisions of this Section 4.2(a) relied upon) within
90 days of the date on which the event(s) first occurred, and the Employer or an
affiliate of the  Employer,  as the case may be, has failed to remedy such event
within the 30 day period following receipt of such notice.


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                  (b) Terminations Which Do Not Give Rise to Separation Benefits
Under This Plan. If a Participant's  employment is terminated for Cause,  death,
disability,  retirement,  or a qualified  sale of  business  (as those terms are
defined  below),  or voluntarily  by the  Participant in the absence of an event
described  in  subsection  (a)(ii),  (iii)  or  (iv) of this  Section  4.2,  the
Participant shall not be entitled to Separation Benefits under the Plan.

                         (i) A termination  for  disability  shall have occurred
                  where a  Participant  is  terminated  because of an illness or
                  injury  and the  Participant  has become  eligible  to receive
                  long-term  disability  benefits under, or would have become so
                  eligible   if  such   Participant   were   covered   by,   the
                  Corporation's  long-term  disability plan, as it exists at the
                  time of termination of employment.

                         (ii) A termination  by  retirement  shall have occurred
                  where  a  Participant's  termination  is due to his  voluntary
                  late,   normal  or  early  retirement  under  a  pension  plan
                  sponsored  by his  Employer or its  affiliates,  as defined in
                  such plan.

                         (iii) A termination for Cause shall have occurred where
                  a Participant is terminated because of:

                                  (A) the willful and  continued  failure of the
                           Participant    to    perform     substantially    the
                           Participant's  duties with the  Corporation or one of
                           its affiliates (other than any such failure resulting
                           from  incapacity due to physical or mental  illness),
                           after a written demand for substantial performance is
                           delivered  to  the  Participant  by the  Board  or an
                           elected officer of the Corporation which specifically
                           identifies  the  manner  in  which  the  Board or the
                           elected officer believes that the Participant has not
                           substantially performed the Participant's duties, or

                                  (B) the willful engaging by the Participant in
                           illegal   conduct  or  gross   misconduct   which  is
                           materially   and   demonstrably   injurious   to  the
                           Corporation.


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                  For purposes of this  provision,  no act or failure to act, on
                  the part of the  Participant,  shall be  considered  "willful"
                  unless it is done, or omitted to be done,  by the  Participant
                  in  bad  faith  or   without   reasonable   belief   that  the
                  Participant's  action or omission was in the best interests of
                  the  Corporation.  Any act,  or  failure  to act,  based  upon
                  authority  given pursuant to a resolution  duly adopted by the
                  Board,  or upon the  advice of  counsel  for the  Corporation,
                  shall be  conclusively  presumed to be done,  or omitted to be
                  done,  by the  Participant  in  good  faith  and  in the  best
                  interests of the Corporation.

                         (iv) A termination  due to a qualified sale of business
                  shall have  occurred  where an Employer or an  affiliate of an
                  Employer has sold,  distributed  or otherwise  disposed of the
                  subsidiary,  branch  or  other  business  unit  in  which  the
                  Participant  was employed  before such sale,  distribution  or
                  disposition and the  Participant  has been offered  employment
                  with  the  purchaser  of  such  subsidiary,  branch  or  other
                  business unit or the  corporation or other entity which is the
                  owner thereof on  substantially  the same terms and conditions
                  under  which he worked for the  Employer  (including,  without
                  limitation, duties and responsibilities,  and the aggregate of
                  the Participant's  base salary and program of benefits).  Such
                  terms and conditions shall also include, without limitation, a
                  legally binding  agreement or plan covering such  Participant,
                  providing  that upon a qualifying  termination  of  employment
                  with  the   subsidiary,   branch  or  business  unit  (or  the
                  corporation or other entity which is the owner thereof) or any
                  successor  thereto of the kind described in Article VI of this
                  Plan, at any time before the third  anniversary of the Date of
                  the Combination,  the Participant's  employer or any successor
                  will pay to each such former  Participant  an amount  equal to
                  the  separation  benefit and other  benefits  that such former
                  Participant  would have received  under the Plan had he been a
                  Participant at the time of such  termination.  For purposes of
                  this subsection, the new employer plan or agreement must treat
                  service  with  any  Employer   (irrespective  of  whether  the
                  Employer was an affiliate of the  Corporation  or the Employee
                  was a  Participant  at the time of such  service)  and the new
                  employer as  continuous  service for  purposes of  calculating
                  separation benefits.
 
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            4.3   Separation Benefits.

                  (a)  If  a   Participant's   employment   is   terminated   in
circumstances  entitling  him to a  separation  benefit as  provided  in Section
4.2(a),  and the Participant  executes and does not revoke a Release  Agreement,
the Participant's Employer shall pay such Participant within fifteen days of the
Date of Termination or, if later,  upon the date such Release  Agreement becomes
irrevocable,  a cash  lump sum as set  forth in  subsection  (b)  below  and the
continued  benefits set forth in  subsection  (c) below,  subject to Section 4.6
below.  For purposes of determining the benefits set forth in subsection (b) and
(c),  if the  termination  of  the  Participant's  employment  is  based  upon a
reduction  of the  Participant's  Annual  Salary or  benefits  as  described  in
subsection (ii) or (iii) of Section 4.2, such reduction shall be ignored.

                  (b) The cash lump sum  referred  to in  Section  4.3(a)  shall
equal the aggregate of the following amounts:
                         (i)  the  sum of (1) the  Participant's  Annual  Salary
                  through the Date of Termination to the extent not  theretofore
                  paid,  (2) the  product  of (x) the sum of the  Target  Annual
                  Incentive plus the Long-Term Incentive and (y) a fraction, the
                  numerator  of which is the number of days in such year through
                  the Date of Termination,  and the denominator of which is 365,
                  and  (3)  any   compensation   previously   deferred   by  the
                  Participant  (together  with any accrued  interest or earnings
                  thereon)  and any  accrued  vacation  pay, in each case to the
                  extent not  theretofore  paid and in full  satisfaction of the
                  rights of the Participant thereto;

                         (ii)  an  amount  equal  to  the  product  of  (1)  the
                  Participant's   Multiple   and   (2)   the   sum  of  (x)  the
                  Participant's  Annual  Salary,  (y) the  higher of the  Target
                  Annual  Incentive or the Annual  Incentive  Award, and (z) the
                  Long-Term Incentive Award;

                         (iii) an amount equal to the difference between (a) the
                  actuarial  equivalent of the benefit  under the  Corporation's
                  qualified  defined benefit  retirement  plan (the  "Retirement
                  Plan")  and any  excess or  supplemental  retirement  plans in
                  which the Participant  participates  and/or other supplemental
                  retirement  benefits to which the  Participant may be entitled
                  under any contract or agreement  (together,  the "SERP") which
                  the  Participant  would  receive  if  his  or  her  employment
                  continued  during the  Separation  Period,  assuming  that the
                  Participant's  compensation during the Separation Period would
                  have  been  equal  to  his or her  compensation  as in  effect
                  immediately  before  the  termination  or, if  higher,  on the
                  Effective  Date,  and  (b)  the  actuarial  equivalent  of the
                  Participant's actual benefit (paid or payable),  if any, under
                  the   Retirement   Plan  and  the  SERP  as  of  the  Date  of

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                  Termination.  The actuarial  assumptions  used for purposes of
                  determining  actuarial  equivalence shall be no less favorable
                  to the Participant  than the most favorable of those in effect
                  under  the  Retirement  Plan  and  the  SERP  on the  Date  of
                  Termination and the Effective Date; and

                         (iv)  The sum of the  additional  contributions  (other
                  than pre-tax salary deferral contributions by the Participant)
                  that would have been made or  credited  by the  Company to the
                  Participant's    accounts   under   each   qualified   defined
                  contribution  plan and  non-qualified  supplemental  executive
                  savings plan, if any, that covered the Participant on the date
                  the termination of employment occurred, determined by assuming
                  that:

                                  (A)The Participant's employment had continued
                           for the Separation Period;

                                  (B) The  Participant's  rate  of  compensation
                           being  recognized by each plan  immediately  prior to
                           the  Date of  Termination  had  continued  in  effect
                           during the Separation Period;

                                  (C) In the case of matching contributions, the
                           Participant's   rate  of  pre-tax   salary   deferral
                           contributions  in  effect  for  the  last  plan  year
                           beginning  prior  to  the  Date  of  Termination  had
                           remained in effect throughout the Separation  Period;
                           and

                                  (D) In the case of discretionary contributions
                           by the  Company,  the Company  continued to make such
                           contributions  during  the  Separation  Period at the
                           rate that  applied to the most  recent plan year that
                           ended prior to the Date of Termination.

                  (c) The  continued  benefits  referred  to  above  shall be as
                      follows.

                         (i) During the Separation  Period,  the Participant and
                  his family  shall be provided  with  medical,  dental and life
                  insurance benefits as if the Participant's  employment had not
                  been terminated;  provided,  however,  that if the Participant
                  becomes  reemployed  with another  employer and is eligible to
                  receive  medical  or  other  welfare  benefits  under  another
                  employer-provided plan, the medical and other welfare benefits
                  described  herein shall be secondary to those  provided  under
                  such other plan during such applicable  period of eligibility;
                  and for purposes of determining  eligibility (but not the time
                  of  commencement  of benefits) of the  Participant for retiree

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                  medical,   dental  and  life  insurance   benefits  under  the
                  Corporation's  plans,  practices,  programs and policies,  the
                  Participant  shall be  considered  to have  remained  employed
                  during the  Separation  Period and to have retired on the last
                  day of such period;

                         (ii) The  Corporation  shall,  at its sole  expense  as
                  incurred,  provide the Participant with outplacement  services
                  the scope  and  provider  of which  shall be  selected  by the
                  Participant  in his or her sole  discretion  (but at a cost to
                  the Corporation of not more than $30,000);

                         (iii) The  Corporation  shall  continue  to provide the
                  Participant  with  financial  planning   counseling   benefits
                  through the second anniversary of the Date of Termination,  on
                  the same terms and  conditions  as were in effect  immediately
                  before the termination or, if more favorable, on the Effective
                  Date; and

                         (iv) the  Corporation  will  continue  to  provide  the
                  Executive  with  his or her  "flexible  perquisite  allowance"
                  through the Separation Period.

To the extent any benefits  described in this Section  4.3(c) cannot be provided
pursuant  to the  appropriate  plan or program  maintained  for  Employees,  the
Employer  shall  provide  such  benefits  outside  such  plan or  program  at no
additional  cost  (including  without  limitation tax cost) to the  Participant.
Notwithstanding  the foregoing,  if a group insurance carrier refuses to provide
the coverage  described in this Section 4.3(c) under its contract  issued to the
Company,  or if the Company  reasonably  determines  that the coverage  required
under this Section 4.3(c) would cause a welfare plan sponsored by the Company to
violate any provision of the Code prohibiting  discrimination in favor of highly
compensated employees or key employees, the Company will use its best efforts to
obtain for the Participant an individual  insurance policy providing  comparable
coverage.  However,  if the  Company  determines  in good faith that  comparable
coverage  cannot be  obtained  for less than two times the  premium  or  premium
equivalent  for such  coverage  under the  Company  welfare  plan or plans,  the
Company's  sole  obligation  under  this  Section  4.3(c)  with  respect to that
coverage will be limited to paying the Participant a monthly amount equal to two
times the monthly  premium or premium  equivalent  for that  coverage  under the
Company's plans.

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            4.4  Other  Benefits  Payable.  The  cash  lump  sum and  continuing
benefits described in Section 4.3 above shall be payable in addition to, and not
in lieu of, all other  accrued or vested or earned  but  deferred  compensation,
rights,  options or other  benefits  which may be owed to a Participant  upon or
following  termination,  including  but not limited to accrued  vacation or sick
pay,  amounts or benefits payable under any bonus or other  compensation  plans,
stock option plan,  stock  ownership  plan,  stock purchase plan, life insurance
plan,  health  plan,  disability  plan or similar or successor  plan,  except as
provided in Section 4.6 below.

            4.5   Certain Additional Payments by the Corporation.

                  (a) Anything in this Plan to the contrary  notwithstanding and
except as set forth below,  in the event it shall be determined that any payment
or  distribution  by the  Corporation or its affiliates to or for the benefit of
the  Participant  (whether  paid or  payable  or  distributed  or  distributable
pursuant to the terms of this Plan or otherwise,  but determined  without regard
to any additional  payments required under this Section 4.5) (a "Payment") would
be subject to the excise tax imposed by Section 4999 of the Code or any interest
or  penalties  are incurred by the  Participant  with respect to such excise tax
(such excise tax, together with any such interest and penalties, are hereinafter
collectively  referred to as the "Excise Tax"),  then the  Participant  shall be
entitled to receive an  additional  payment (a "Gross-Up  Payment") in an amount
such that after payment by the Participant of all taxes  (including any interest
or penalties imposed with respect to such taxes), including, without limitation,
any income taxes (and any interest and penalties  imposed with respect  thereto)
and Excise Tax imposed upon the Gross-Up  Payment,  the  Participant  retains an
amount  of the  Gross-Up  Payment  equal  to the  Excise  Tax  imposed  upon the
Payments.  If a Gross-Up Payment is made as discussed above, as calculated under
Internal  Revenue  Service  regulations,  it shall be  exclusive  of all amounts
attributable  to any cash payment  based on a Stock Award.  Notwithstanding  the
foregoing  provisions of this Section 4.5(a), if it shall be determined that the
Participant  is entitled  to a Gross-Up  Payment,  but that the  Payments do not
exceed 110% of the greatest amount (the "Reduced  Amount") that could be paid to
the  Participant  such that the receipt of  Payments  would not give rise to any
Excise Tax, then no Gross-Up  Payment shall be made to the  Participant  and the
Payments, in the aggregate, shall be reduced to the Reduced Amount.

                  (b)  Subject  to  the  provisions  of  Section   4.5(c),   all
determinations required to be made under this Section 4.5, including whether and
when a Gross-Up  Payment is required and the amount of such Gross-Up Payment and
the assumptions to be utilized in arriving at such determination,  shall be made
by a nationally  recognized  accounting  firm selected by the  Corporation  (the
"Accounting Firm"), which shall provide detailed supporting calculations both to
the Corporation  and the  Participant  within 15 business days of the receipt of
notice from the Participant that there has been a Payment,  or such earlier time
as is requested by the Corporation. All fees and expenses of the Accounting Firm
shall be borne solely by the Corporation.  Any Gross-Up  Payment,  as determined
pursuant  to  this  Section  4.5,  shall  be  paid  by  the  Corporation  to the


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<PAGE>

Participant   within  five  days  of  the  receipt  of  the  Accounting   Firm's
determination.  Any  determination  by the Accounting Firm shall be binding upon
the  Corporation  and the  Participant.  As a result of the  uncertainty  in the
application of Section 4999 of the Code at the time of the initial determination
by the Accounting  Firm hereunder,  it is possible that Gross-Up  Payments which
will  not  have   been   made  by  the   Corporation   should   have  been  made
("Underpayment"),   consistent  with  the  calculations   required  to  be  made
hereunder.  In the event that the Corporation  exhausts its remedies pursuant to
Section 4.5(c) and the  Participant  thereafter is required to make a payment of
any  Excise  Tax,  the  Accounting  Firm  shall  determine  the  amount  of  the
Underpayment that has occurred and any such Underpayment  shall be promptly paid
by the Corporation to or for the benefit of the Participant.

                  (c) The Participant shall notify the Corporation in writing of
any claim by the Internal Revenue Service that, if successful, would require the
payment by the Corporation of the Gross-Up Payment.  Such notification  shall be
given as soon as  practicable  but no later  than ten  business  days  after the
Participant  is  informed  in  writing  of such  claim  and  shall  apprise  the
Corporation  of the  nature of such  claim and the date on which  such  claim is
requested  to be paid.  The  Participant  shall not pay such claim  prior to the
expiration of the 30-day period following the date on which it gives such notice
to the  Corporation  (or such shorter period ending on the date that any payment
of taxes with  respect to such claim is due).  If the  Corporation  notifies the
Participant in writing prior to the expiration of such period that it desires to
contest such claim, the Participant shall:

                         (i)  give  the  Corporation any information reasonably
                  requested by the Corporation relating to such claim,

                         (ii) take such  action in  connection  with  contesting
                  such  claim as the  Corporation  shall  reasonably  request in
                  writing  from  time to time,  including,  without  limitation,
                  accepting legal  representation  with respect to such claim by
                  an attorney reasonably selected by the Corporation,

                         (iii)  cooperate with the  Corporation in good faith in
                  order effectively to contest such claim, and

                         (iv)  permit  the  Corporation  to  participate  in any
                  proceedings relating to such claim;

provided,  however,  that the Corporation  shall bear and pay directly all costs
and  expenses   (including   additional  interest  and  penalties)  incurred  in
connection  with such  contest  and  shall  indemnify  and hold the  Participant
harmless,  on an after-tax  basis,  for any Excise Tax or income tax  (including
interest  and  penalties  with  respect  thereto)  imposed  as a result  of such
representation  and payment of costs and  expenses.  Without  limitation  on the
foregoing  provisions of this Section 4.5(c),  the Corporation shall control all
proceedings  taken in connection with such contest and, at its sole option,  may

                                       12
<PAGE>

pursue or forgo any and all administrative  appeals,  proceedings,  hearings and
conferences  with the taxing  authority in respect of such claim and may, at its
sole option,  either direct the Participant to pay the tax claimed and sue for a
refund or  contest  the claim in any  permissible  manner,  and the  Participant
agrees to prosecute such contest to a  determination  before any  administrative
tribunal,  in a court  of  initial  jurisdiction  and in one or  more  appellate
courts,  as the Corporation  shall  determine;  provided,  however,  that if the
Corporation  directs the Participant to pay such claim and sue for a refund, the
Corporation  shall advance the amount of such payment to the Participant,  on an
interest-free basis and shall indemnify and hold the Participant harmless, on an
after-tax  basis,  from any  Excise  Tax or income tax  (including  interest  or
penalties  with  respect  thereto)  imposed with respect to such advance or with
respect to any imputed income with respect to such advance; and further provided
that any  extension of the statute of  limitations  relating to payment of taxes
for the taxable year of the  Participant  with  respect to which such  contested
amount  is  claimed  to be due is  limited  solely  to  such  contested  amount.
Furthermore, the Corporation's control of the contest shall be limited to issues
with  respect to which a Gross-Up  Payment  would be payable  hereunder  and the
Participant  shall be  entitled  to settle or  contest,  as the case may be, any
other  issue  raised  by  the  Internal  Revenue  Service  or any  other  taxing
authority.

                  (d) If,  after the  receipt  by the  Participant  of an amount
advanced by the Corporation  pursuant to Section 4.5(c), the Participant becomes
entitled to receive any refund with respect to such claim, the Participant shall
(subject to the Corporation's complying with the requirements of Section 4.5(c))
promptly pay to the  Corporation  the amount of such refund  (together  with any
interest paid or credited thereon after taxes applicable thereto). If, after the
receipt by the Participant of an amount advanced by the Corporation  pursuant to
Section  4.5(c),  a  determination  is made  that the  Participant  shall not be
entitled to any refund with respect to such claim and the  Corporation  does not
notify the Participant in writing of its intent to contest such denial of refund
prior to the expiration of 30 days after such  determination,  then such advance
shall be forgiven  and shall not be required to be repaid and the amount of such
advance  shall offset,  to the extent  thereof,  the amount of Gross-Up  Payment
required to be paid.

            4.6   Conditions to Payment Obligations.

                  (a)  Except  as  provided  in  Section   4.6(b)   below,   the
obligations of the Corporation and the Employers to pay the Separation  Benefits
and the Gross-Up  Payment and other  payments  described in Section 4.5 shall be
absolute  and  unconditional  and shall not be  affected  by any  circumstances,
including, without limitation, any set-off, counterclaim, recoupment, defense or
other right which the  Corporation or any of its  Subsidiaries  may have against
any Participant.

                  (b)  Notwithstanding  any other  provision of this Plan or any
other plan, program, practice or policy of any Employer: (i) any cash Separation
Benefits that a Participant  becomes entitled to receive under Section 4.3(b) of



                                       13
<PAGE>

this Plan shall be reduced (but not below zero) by the aggregate  amount of cash
severance,  separation, or similar benefits that the Participant may be entitled
to  receive  under any other  plan,  program,  policy,  contract,  agreement  or
arrangement  of any  Employer  (including  without  limitation  the  NCE  Senior
Executive Severance Policy),  except to the extent the Participant waives his or
her right thereto,  and by the aggregate  amount of such cash benefits or pay in
lieu of notice that the Participant may be entitled to receive under  applicable
law; and (ii) any  continued  benefits that a  Participant  becomes  entitled to
receive under Section  4.3(c) of this Plan shall be provided  concurrently  (not
consecutively)  with any such benefits that such  Participant may be entitled to
receive  under  any  other  plan,  program,  policy,   contract,   agreement  or
arrangement of any Employer or applicable law (including  without limitation the
health  continuation  coverage required by Section 4980B of the Code and Section
601 et seq. of the Employee Retirement Income Security Act of 1974, as amended).
In no event shall a  Participant  be obligated to seek other  employment or take
any other action by way of  mitigation  of the amounts  payable to a Participant
under any of the  provisions  of this Plan,  nor shall the amount of any payment
hereunder be reduced by any compensation  earned by a Participant as a result of
employment  by another  employer,  except as  specifically  provided  in Section
4.3(c)(i).


                                    ARTICLE V
                             PARTICIPATING EMPLOYERS


            This Plan may be adopted by any Subsidiary of the Corporation.  Upon
such  adoption,  the  Subsidiary  shall  become an  Employer  hereunder  and the
provisions  of the Plan  shall  be fully  applicable  to the  Employees  of that
Subsidiary who are Participants pursuant to Section 3.1.

                                   ARTICLE VI
                            SUCCESSOR TO CORPORATION


            This Plan shall bind any successor of the Corporation, its assets or
its businesses (whether direct or indirect, by purchase,  merger,  consolidation
or  otherwise),  in the same manner and to the same extent that the  Corporation
would be obligated under this Plan if no succession had taken place.

            In the case of any transaction in which a successor would not by the
foregoing  provision  or by  operation  of  law  be  bound  by  this  Plan,  the
Corporation shall require such successor expressly and unconditionally to assume
and agree to perform the Corporation's  obligations under this Plan, in the same

                                       14
<PAGE>

manner and to the same extent that the Corporation  would be required to perform
if no such succession had taken place. The term  "Corporation,"  as used in this
Plan,  shall mean the Corporation as  hereinbefore  defined and any successor or
assignee to the business or assets which by reason hereof  becomes bound by this
Plan.


                                   ARTICLE VII
                       DURATION, AMENDMENT AND TERMINATION


            7.1 Duration.  If the Combination has not occurred,  this Plan shall
expire five years from the  Effective  Date,  unless  extended for an additional
period or periods by resolution adopted by the Board. If the Combination occurs,
this Plan shall  continue  in full force and effect and shall not  terminate  or
expire  until  after  all  Participants  who  become  entitled  to any  payments
hereunder  shall  have  received  such  payments  in full and all  payments  and
adjustments required to be made pursuant to Section 4.5 have been made.

            7.2 Amendment. Except as provided in Section 7.1, the Plan shall not
be  subject  to  amendment,  change,  substitution,   deletion,   revocation  or
termination in any respect which adversely affects the rights of Participants.

            7.3 Form of  Amendment.  The form of any amendment of the Plan shall
be a written  instrument signed by a duly authorized  officer or officers of the
Corporation, certifying that the amendment has been approved by the Board.

            7.4   Pooling-of-Interests.   Notwithstanding  any  other  provision
contained  in this Plan to the  contrary,  if any action taken or required to be
taken  pursuant to the terms of this Plan would preclude the use of the "pooling
of interests"  accounting method with respect to the Combination,  this Plan and
any rights created  hereunder  shall be deemed null and void ab initio and of no
further force or effect.

                                  ARTICLE VIII
                                  MISCELLANEOUS


            8.1 Indemnification. If a Participant institutes any legal action in
seeking to obtain or enforce,  or is required to defend in any legal  action the
validity or  enforceability  of, any right or benefit provided by this Plan, the
Corporation or the Employer will pay for all reasonable  legal fees and expenses
incurred (as  incurred) by such  Participant,  regardless of the outcome of such
action.

                                       15
<PAGE>

            8.2 Employment  Status.  This Plan does not constitute a contract of
employment  or impose  on the  Participant  or the  Participant's  Employer  any
obligation to retain the Participant as an Employee, to change the status of the
Participant's  employment,  or to change the Corporation's  policies or those of
its Subsidiaries regarding termination of employment.

            8.3 Claim  Procedure.  If an  Employee  or former  Employee  makes a
written request alleging a right to receive benefits under this Plan or alleging
a right to receive an  adjustment  in  benefits  being paid under the Plan,  the
Corporation shall treat it as a claim for benefit.  All claims for benefit under
the Plan shall be sent to the Human Resources  Department of the Corporation and
must be  received  within  30  days  after  termination  of  employment.  If the
Corporation  determines  that any  individual who has claimed a right to receive
benefits,  or different benefits,  under the Plan is not entitled to receive all
or any part of the benefits  claimed,  it will inform the claimant in writing of
its  determination and the reasons therefor in terms calculated to be understood
by the claimant.  The notice will be sent within 90 days of the claim unless the
Corporation  determines  additional time, not exceeding 90 days, is needed.  The
notice shall make specific  reference to the pertinent Plan  provisions on which
the denial is based,  and describe any  additional  material or  information  is
necessary.  Such notice shall,  in addition,  inform the claimant what procedure
the claimant should follow to take advantage of the review  procedures set forth
below in the event the claimant  desires to contest the denial of the claim. The
claimant may within 90 days  thereafter  submit in writing to the  Corporation a
notice  that  the  claimant  contests  the  denial  of his or her  claim  by the
Corporation and desires a further review.  The Corporation  shall within 60 days
thereafter  review the claim and authorize the claimant to appear personally and
review pertinent  documents and submit issues and comments relating to the claim
to the  persons  responsible  for  making  the  determination  on  behalf of the
Corporation.  The  Corporation  will  render its final  decision  with  specific
reasons  therefor in writing and will transmit it to the claimant within 60 days
of the written request for review, unless the Corporation  determines additional
time, not exceeding 60 days, is needed, and so notifies the Participant.  If the
Corporation  fails to respond to a claim filed in accordance  with the foregoing
within 60 days or any such extended period,  the Corporation  shall be deemed to
have denied the claim.

            8.4 Validity and Severability. The invalidity or unenforceability of
any provision of the Plan shall not affect the validity or enforceability of any
other  provision of the Plan,  which shall remain in full force and effect,  and
any prohibition or  unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction.

            8.5 Governing Law. The validity,  interpretation,  construction  and
performance  of the  Plan  shall  in all  respects  be  governed  by the laws of
Colorado,  without  reference to  principles  of conflict of law,  except to the
extent preempted by federal law.

                                       16
<PAGE>

            8.6  Withholding.  The  Corporation  may  withhold  from any and all
amounts  payable under this Plan all federal,  state,  local,  and foreign taxes
that may be required to be withheld by applicable laws or regulations.

                                             New Century Energies, Inc.



                                                /s/ Bill D. Helton
                                             ---------------------------
                                             By : Bill D. Helton
                                             Its  Chairman and
                                                  Chief Executive Officer



                                       17
<PAGE>


                                   SCHEDULE I
                                  Participants

                  Name                                  Multiple
                  ----                                  --------

            Paul J. Bonavia                              2.5

            Doyle R. Bunch II                            2.5

            Henry H. Hamilton                            2.5

            Brian P. Jackson                             2.5

            Richard C. Kelly                             2.5

            James T. Petillo                             2.5

            David M. Wilks                               2.5

            Gary L. Gibson                               2.5

            Cathy J. Hart                                2

            Ross C. King                                 2

            Teresa S. Madden                             2

            John McAfee                                  2

            Marilyn E. Taylor                            2

            Patricia Vincent                             2



<PAGE>


                                      - 1 -




                                    EXHIBIT A

                            FORM OF RELEASE AGREEMENT

            THIS  AGREEMENT is entered  into this ___ day of ________,  19___ by
and between New Century Energies, Inc. (the "Company"),  a Delaware corporation,
and ________________ ("Participant").

            WHEREAS,  the Participant has become entitled to receive  Separation
Benefits under the NCE 1999 Senior Executive  Severance Policy (the "Policy") on
the condition that the Participant enter into this Release Agreement.

            NOW, THEREFORE, in consideration of the Covenant Consideration,  the
Participant, intending to be legally bound, agrees as follows:

            1.    Acknowledgment.

            (a) The Participant  understands and agrees that, in addition to the
Participant's below-described exposure to the Company's Confidential Information
or Trade Secrets, the Participant may, in his capacity as an employee,  at times
meet with the Company's  customers and  suppliers,  and that as a consequence of
using and  associating  with the  Company's  name,  goodwill,  and  professional
reputation,  the  Participant  will be in a  position  to develop  personal  and
professional  relationships  with the Company's past,  current,  and prospective
customers and suppliers.  The Participant  further  acknowledges that during the
course and as a result of  employment  by the Company,  the  Participant  may be
provided certain specialized training or know-how.  The Participant  understands
and agrees  that this  goodwill  and  reputation,  as well as the  Participant's
knowledge of Confidential  Information or Trade Secrets and specialized training
and know-how, could be used unfairly in competition against the Company.

            (b)  Accordingly,  the Participant  agrees that during the period of
one year after the Date of Termination (the "Covenant Period"),  the Participant
shall not:
                  (i) Directly or indirectly solicit, service, contract with, or
            otherwise  engage  any  past  (one  (1)  year  prior),  existing  or
            prospective customer, client, or account who then has a relationship
            with the Company for current or prospective business on behalf of an
            individual  or entity  that is engaged in a Competing  Business  (as
            defined below),  or on the  Participant's own behalf for a Competing
            Business; the term "Competing Business" meaning for purposes of this
            clause (i) a business or enterprise  that is engaged in the business
            of  generation,  purchase,  transmission,  distribution,  or sale of
            electricity, or in the purchase, transmission, distribution, sale or
            transportation of natural gas within the States of Colorado, Kansas,
            Minnesota,  New Mexico, North Dakota, Oklahoma, South Dakota, Texas,
            Wisconsin or Wyoming; and the Participant and the Company agree that


<PAGE>

            this  provision  is  reasonably   enforced  with  reference  to  the
            foregoing states to the extent applicable to such relationships with
            the Company;

                  (ii)  Cause or attempt to cause any  existing  or  prospective
            customer,  client, or account,  who then has a relationship with the
            Company for current or prospective business,  to divert,  terminate,
            limit or in any manner  modify,  or fail to enter into any actual or
            potential   business   relationship   with  the  Company;   and  the
            Participant   and  the  Company  agree  that  this  clause  (ii)  is
            reasonably enforced with reference to any geographic area applicable
            to such relationships with the Company; and

                  (iii) Directly or indirectly solicit,  employ or conspire with
            others to employ any of the Company's  employees;  the term "employ"
            for  purposes  of  this  clause  (iii)  meaning  to  enter  into  an
            arrangement  for  services as a  full-time  or  part-time  employee,
            independent  contractor,  consultant,  agent or  otherwise;  and the
            Participant  and  the  Company  agree  that  this  clause  (iii)  is
            reasonably enforced as to any geographic area.

            (c) The  Participant  further  agrees to inform any new  employer or
other  person  or  entity  with  whom the  Participant  enters  into a  business
relationship  during the Covenant  Period,  before  accepting such employment or
entering into such a business  relationship,  of the existence of this Agreement
and give such employer, person or other entity a copy of this Agreement.

            2. Return of Property.  The Participant agrees that upon the Date of
Termination,  the originals  and all copies of any and all documents  (including
computer  data,  diskettes,  programs,  or printouts)  that contain any customer
information,  financial information,  product information,  or other information
that in any way relates to the Company,  its products or services,  its clients,
its  suppliers,  or other aspects of its business that are in the  Participant's
possession shall be immediately returned to the Company. The Participant further
agrees to not retain any summary of such information.

            3.    Confidential Information/Trade Secrets.

            (a) The  Participant  acknowledges  that  during the course and as a
result of his or her  employment,  the Participant may receive or otherwise have
access to, or contribute to the production of, Confidential Information or Trade
Secrets.  "Confidential  Information or Trade Secrets" means information that is
proprietary to or in the unique knowledge of the Company (including  information
discovered or developed in whole or in part by the  Participant);  the Company's
business methods and practices; or information that derives independent economic
value,  actual or potential,  from not being  generally  known to, and not being
readily  ascertainable by proper means by, other persons who can obtain economic
value  from its  disclosure  or use,  and is the  subject  of  efforts  that are


                                       2
<PAGE>

reasonable under the circumstances to maintain its secrecy.  It includes,  among
other things, strategies,  procedures,  manuals,  confidential reports, lists of
clients,  customers,  suppliers,  past,  current or possible  future products or
services,   and  information  concerning  research,   development,   accounting,
marketing,  selling or leases and the  prices or charges  paid by the  Company's
customers to the Company,  or by the Company to its suppliers.  The  Participant
acknowledges  his  continuing  agreement to abide by the terms of the  Company's
Corporate Code of Conduct.

            (b) The Participant  further  acknowledges  and appreciates that any
Confidential  Information  or Trade Secret  constitutes a valuable  asset of the
Company and that the Company  intends any such  information to remain secret and
confidential.  The Participant therefore  specifically agrees that except to the
extent  required by the  Participant's  duties to the Company or as permitted by
the express  written consent of the Board of Directors,  the  Participant  shall
never,  either  during  employment  with the Company or at any time  thereafter,
directly or indirectly use, discuss or disclose any Confidential  Information or
Trade Secrets of the Company or otherwise use such information to his or her own
or a third party's benefit.

            4.  Consideration.  The  Participant  and the Company agree that the
above  provisions  of  this  Agreement  are  reasonable  and  necessary  for the
protection  of the Company and its business.  In exchange for the  Participant's
agreement to be bound by the terms of this  Agreement,  the Company has provided
the  Participant  the  Separation  Benefits  under the Policy.  The  Participant
accepts and acknowledges the adequacy of such consideration for this Agreement.

            5. Remedies for Breach.  The Participant  acknowledges that a breach
of the above  provisions of this  Agreement  will cause the Company  irreparable
harm that would not be fully  remedied by  monetary  damages.  Accordingly,  the
Participant  agrees that the Company  shall,  in addition to the  requirement to
return the Covenant Consideration to the Company and any relief afforded by law,
be entitled to injunctive  relief.  The Participant  agrees that both damages at
law and  injunctive  relief  shall be proper  modes of relief  and are not to be
considered alternative remedies.

            6.    Release.

            (a) In  consideration  of the Separation  Benefits,  the Participant
does  hereby  fully  and  completely  release  and  waive  any and  all  claims,
complaints,  causes of action or demands of whatever kind which the  Participant
has  or  may  have  against  the  Company  and  its  predecessors,   successors,
subsidiaries  and  affiliates  and all  officers,  employees and agents of those
persons and companies arising out of any actions, conduct,  decisions,  behavior
or events occurring to the date of his or her execution of this Release of which
the Participant is or has been made aware or has been reasonably put on notice.

            (b) The  Participant  understands  and  accepts  that  this  release
specifically covers but is not limited to any and all claims, complaints, causes
of action or demands of  whatever  kind  which the  Participant  has or may have

                                       3
<PAGE>


against the above-referenced  released parties relating in any way to the terms,
conditions and circumstances of his or her employment to date,  whether based on
statutory,  regulatory  or common  law  claims  for  employment  discrimination,
including but not limited to race, color,  sex, age or reprisal  discrimination,
arising under the Federal Civil Rights Act of 1964, as amended,  Executive Order
11246, the Age Discrimination in Employment Act, as amended,  the Colorado Civil
Rights Act or any other administrative  order, federal or state statute or local
ordinance,  wrongful  discharge,  breach of  contract,  breach of any express or
implied promise,  misrepresentation,  fraud,  reprisal,  retaliation,  breach of
public  policy,  infliction  of  emotional  distress,   defamation,   promissory
estoppel, invasion of privacy, negligence, or any other theory, whether legal or
equitable;  except that this  release  will not impair any  existing  rights the
Participant  may have  under  any  presently  existing  pension,  retirement  or
employee benefit plan of the Company.

            (c) By signing below,  the Participant  acknowledges  that he or she
fully  understands  and accepts the terms of this release,  and  represents  and
agrees that his or her signature is freely, voluntarily and knowingly given [and
that he or she has been provided a full opportunity to review and reflect on the
terms of this  release  for at least  [21] [45]  days and to seek the  advice of
legal  counsel  of his or her  choice,  which  advice the  Participant  has been
encouraged to obtain] [include if necessary].

            7. The Participant's Acknowledgment of Review[; Right to Revoke].

            [(a) ]The Participant  represents that the Participant has carefully
read  and  fully  understands  all  provisions  of this  Agreement  and that the
Participant has had a full  opportunity to review this Agreement  before signing
and to have all the terms of this Agreement explained to him or her by counsel.

            [(b) This  Agreement  may be revoked by the  Participant  by written
notice given to [insert  address]  within 7 business  days after being signed by
the Participant.]

            8. General  Provisions.  The Participant and the Company acknowledge
and agree as follows:

            (a) This Agreement contains the entire  understanding of the parties
with  regard to all matters  contained  herein.  There are no other  agreements,
conditions, or representations, oral or written, express or implied, with regard
to such matters;

            (b) This  Agreement  may be  amended or  modified  only by a writing
signed by both parties;

            (c) Waiver by either the Company or the  Participant  of a breach of
any  provision,  term or condition  hereof shall not be deemed or construed as a
further  or  continuing  waiver  thereof  or a waiver of any breach of any other
provision, term or condition of this Agreement;


                                       4
<PAGE>


            (d) This Agreement shall inure to the benefit of and be binding upon
the Company and its  successors  and  assigns.  The  Company  shall  require any
successor  (whether direct or indirect,  by purchase,  merger,  consolidation or
otherwise)  to all or  substantially  all of the business  and/or  assets of the
Company  expressly  to assume and agree to perform  this  Agreement  in the same
manner and to the same  extent  that the  Company  would have been  required  to
perform it if no such  succession  had taken place.  As used in this  Agreement,
"the  Company"  shall  mean  NCE and its  affiliates  or  assigns  and any  such
successor that assumes and agrees to perform this Agreement, by operation of law
or otherwise.  No assignment of this Agreement shall be made by the Participant,
and any purported assignment shall be null and void;

            (e) If any court finds any provision or part of this Agreement to be
unreasonable,  in whole or in part, such provision shall be deemed and construed
to be reduced to the maximum  duration,  scope or subject matter allowable under
applicable law. Any invalidation of any provision or part of this Agreement will
not invalidate any other part of this Agreement;

            (f) This Agreement will be construed and enforced in accordance with
the laws and legal principles of the State of Colorado. The Participant consents
to the  jurisdiction  of  the  Colorado  courts  for  the  enforcement  of  this
Agreement; and

            (g) This Agreement may be executed in one or more counterparts, each
of which  shall be  deemed to be an  original,  but all of which  together  will
constitute one and the same instrument.

THIS AGREEMENT IS INTENDED TO BE A LEGALLY BINDING DOCUMENT FULLY ENFORCEABLE IN
ACCORDANCE  WITH ITS TERMS.  IF IN DOUBT,  SEEK  COMPETENT  LEGAL ADVICE  BEFORE
SIGNING.



- -------------------------------------------------     ------------------------
                  (The Participant)                         Date



NCE


By_______________________________________________     ________________________
                                                      Date

      Its_________________________________________


                                       5
<PAGE>

The  Participant  acknowledges  that  he or she  has  received  a copy  of  this
Agreement.


                                       6
<PAGE>
                                                                   EXHIBIT 10(b)

                  EMPLOYMENT AGREEMENT OF WAYNE H. BRUNETTI

            THIS  AGREEMENT  by and between  Northern  States Power  Company,  a
Minnesota  corporation  (the  "Company"),  and New  Century  Energies,  Inc.,  a
Delaware corporation ("NCE"), and Wayne H. Brunetti (the "Executive"),  dated as
of the 24th day of March, 1999.

                                 WITNESSETH THAT

            WHEREAS, the Company and NCE have entered into an Agreement and Plan
of Merger dated as of March 24, 1999 (the "Merger Agreement"),  whereby NCE will
merge with and into the Company (the "Merger");

            WHEREAS,  the  Company  and NCE  wish  to  provide  for the  orderly
succession of management of the surviving  company in the Merger (the "Company")
following the Effective Time (as defined in the Merger Agreement); and

            WHEREAS,  the  Company  and  NCE  further  wish to  provide  for the
employment by the Company of the  Executive,  and the Executive  wishes to serve
the Company, in the capacities and on the terms and conditions set forth in this
Agreement;

            NOW, THEREFORE, it is hereby agreed as follows:

1.    Effect on Prior Agreements; Employment Period.

            (a) The  Executive  is  currently  employed  by NCE  pursuant  to an
Employment  Agreement  dated as of August 1, 1997 (the "Prior  Agreement").  The
Prior  Agreement  shall remain in effect without  amendment  until the Effective
Time (as defined in the Merger  Agreement),  and this Agreement  shall supersede
the Prior  Agreement  at the  Effective  Time.  The Change in Control  Agreement
between NCE and the Executive  shall remain in effect from and after the date of
this Agreement,  except that the Executive hereby waives any right that he might
otherwise  have to receive any  severance or other  payment or benefit under the
Change In Control Agreement that would be duplicative of a payment or benefit to
which he is entitled under this Agreement.

            (b) The Company shall employ the Executive,  and the Executive shall
serve the Company, on the terms and conditions set forth in this Agreement,  for
an initial period (the "Initial  Period") and a further  period (the  "Secondary
Period") (the Initial Period and the Secondary  Period are hereinafter  referred
to in the aggregate as the "Employment Period").  The Initial Period shall begin
at the Effective Time and end on the first  anniversary  of the Effective  Time.
The  Secondary  Period shall begin on the first day after the end of the Initial
Period  and end on the third  anniversary  of such day;  provided,  that on each
anniversary of such day, the Secondary Period shall be automatically extended by
an additional  year unless either the Company or the Executive  shall have given
notice to the other,  not less than 60 days  before such  anniversary,  that the
Secondary Period shall not be so extended.


<PAGE>

            (c)  Notwithstanding  any other  provision of this  Agreement,  this
Agreement  shall be null and void and of no force or effect unless and until the
Merger is consummated.

2.    Position and Duties; Location.

            (a) During the Initial  Period,  the Executive  shall serve as Chief
Executive  Officer and President of the Company.  During the Second Period,  the
Executive shall serve as Chief Executive  Officer of the Company and Chairman of
the Board of Directors of the Company (the "Board").  The Executive  shall serve
in each  such case as an  employee  of the  Company  and with  such  duties  and
responsibilities as are customarily  assigned to such positions,  and such other
duties and responsibilities not inconsistent  therewith as may from time to time
be assigned to him by the Board. The Executive shall be a member of the Board on
the  first  day of the  Employment  Period,  and the  Board  shall  propose  the
Executive for re-election to the Board throughout the Employment Period.

            (b) During the  Employment  Period as is  customary,  the  Executive
shall report to the Board.

            (c) During the  Employment  Period,  and  excluding  any  periods of
vacation and sick leave to which the Executive is entitled,  the Executive shall
devote  reasonable  attention  and  time  during  normal  business  hours to the
business  and affairs of the Company  and, to the extent  necessary to discharge
the  responsibilities  assigned to the Executive under this  Agreement,  use the
Executive's   reasonable  best  efforts  to  carry  out  such   responsibilities
faithfully  and  efficiently.  It shall not be  considered  a  violation  of the
foregoing  for the  Executive  to  serve  on  corporation,  industry,  civic  or
charitable boards or committees, so long as such activities do not significantly
interfere  with  the  performance  of  the  Executive's  responsibilities  as an
employee of the Company in accordance with this Agreement.

            (d) During the period  beginning on the first day of the  Employment
Period and ending as soon as  practicable  thereafter but in no event later than
the date of the first  subsequent  annual  meeting  of the  shareholders  of the
Company (the "Transition Period"), the Executive's service shall be performed at
the Company's  headquarters in Minneapolis,  Minnesota and at NCE's headquarters
in Denver, Colorado. After the end of the Transition Period, the Executive shall
spend the  majority of his time and  perform  the  majority of his duties at the
Company's headquarters in Minneapolis,  Minnesota.  No later than the end of the
Transition Period, the Executive shall relocate the residence at which he spends
the majority of his time to the Twin Cities area.  The Company  shall  reimburse
the Executive for all of his moving expenses  incurred in such  relocation,  and
during  the  period  from the first day of the  Employment  Period  through  the
earlier of the end of the Transition Period and the date of such relocation, the
Company  shall  provide the  Executive  with an  apartment  in  Minneapolis  and
reimburse him for reasonable  expenses of meals while in Minneapolis  and travel
between Minneapolis and his principal residence,  provided in each case that the
Executive  complies with the policies,  practices and  procedures of the Company
for submission of expense reports,  receipts,  or similar  documentation of such
expenses.

                                       2
<PAGE>

3.    Compensation.

            (a) Base Salary. The Executive's  compensation during the Employment
Period  shall  be  determined  by  the  Board  upon  the  recommendation  of the
Compensation  Committee of the Board,  subject to the next  sentence and Section
3(b). During the Employment  Period,  the Executive shall receive an annual base
salary (the "Annual Base Salary") at least equal to his annual base salary as in
effect  immediately  before the Effective  Time. The Annual Base Salary shall be
payable in accordance with the Company's regular payroll practice for its senior
executives,  as in effect from time to time. During the Employment  Period,  the
Annual Base Salary shall be reviewed at least  annually  for possible  increase.
Any  increase  in the  Annual  Base  Salary  shall not limit or reduce any other
obligation of the Company under this Agreement.

            (b)  Incentive  Compensation.  During  the  Employment  Period,  the
Executive  shall  participate  in short-term  incentive  compensation  plans and
long-term incentive  compensation plans (the latter to consist of plans offering
stock options,  restricted  stock and other  long-term  incentive  compensation)
providing him with the opportunity to earn, on a year-by-year basis,  short-term
and long-term  incentive  compensation  (the "Incentive  Compensation") at least
equal to the amounts that he had the  opportunity  to earn under the  comparable
plans of NCE as in effect immediately before the Effective Time.

            (c)   Other Benefits.

                  (i)  Supplemental   Executive   Retirement  Plan.  During  the
Employment Period,  the Executive shall participate in a supplemental  executive
retirement  plan  ("SERP")  such  that the  aggregate  value  of the  retirement
benefits that he and his spouse will receive at the end of the Employment Period
under all  defined  benefit  plans of the Company  and its  affiliates  (whether
qualified or not) will be not less than the  aggregate  value of the benefits he
and his spouse would have received (and with the same forms of benefit payments)
had he  continued,  through  the end of the  Employment  Period,  to accrue  the
supplemental  retirement  benefits  provided  by the  terms  of  his  employment
agreement with NCE as in effect  immediately before the Effective Time and those
of Public  Service  Company of  Colorado  ("PSCo")  as in effect as of August 1,
1997.

                  (ii) During the Employment  Period,  the Company shall provide
the Executive  with life  insurance  coverage  providing a death benefit to such
beneficiary  or  beneficiaries  as the  Executive may designate of not less than
400% of the Executive's  then-current  Annual Base Salary if death occurs during
employment,  and  equal to 200% his final  Annual  Base  Salary if death  occurs
following termination of employment.

                  (iii) In addition,  and without limiting the generality of the
foregoing,  during the Employment Period and thereafter: (A) the Executive shall
be entitled to participate in all applicable  incentive,  savings and retirement
plans,  practices,  policies and programs of the Company and its subsidiaries to
the same extent as other senior executives of the Company; and (B) the Executive
and/or  the  Executive's  family,  as the case may be,  shall  be  eligible  for
participation  in, and shall receive all benefits under, all applicable  welfare
benefit plans, practices,  policies and programs provided by the Company and its

                                       3
<PAGE>

subsidiaries,  other than severance plans, practices,  policies and programs but
including, without limitation,  medical, prescription,  dental, disability, sick
leave,  employee life  insurance,  group life  insurance,  accidental  death and
travel accident insurance plans and programs, to the same extent as other senior
executives  of  the  Company  (but  excluding  the  Company's  Senior  Executive
Severance  Policy  and 1999  Senior  Executive  Severance  Policy and NCE's 1999
Senior Executive Severance Policy (the "Severance Policies").

            (d) Fringe  Benefits.  During the Employment  Period,  the Executive
shall be entitled to receive fringe benefits on the same terms and conditions as
the greater of (i) the fringe  benefits  received by, or available  to, him from
NCE immediately  before the Effective Time, or (ii) the fringe benefits provided
by the  Company or its  subsidiaries  which are  available  to the next  highest
executive officer of the Company for the year.

4.    Termination of Employment.

            (a) Death or Disability.  The Executive's employment shall terminate
automatically  upon the  Executive's  death during the  Employment  Period.  The
Company shall be entitled to terminate the Executive's employment because of the
Executive's Disability during the Employment Period. "Disability" means that (i)
the Executive has been unable, for a period of 180 consecutive business days, to
perform the Executive's duties under this Agreement,  as a result of physical or
mental  illness or injury,  and (ii) a physician  selected by the Company or its
insurers,   and   acceptable   to  the  Executive  or  the   Executive's   legal
representative,  has  determined  that the  Executive's  incapacity is total and
permanent.  A  termination  of the  Executive's  employment  by the  Company for
Disability  shall be communicated to the Executive by written notice,  and shall
be effective on the 30th day after receipt of such notice by the Executive  (the
"Disability   Effective  Date")  unless  the  Executive   returns  to  full-time
performance of the Executive's duties before the Disability Effective Date.

            (b)   By the Company.

                  (i) The  Company  may  terminate  the  Executive's  employment
during the Employment Period for Cause or without Cause. "Cause" means:

                        A. the willful and  continued  failure of the  Executive
                  substantially  to perform the  Executive's  duties  under this
                  Agreement  (other  than as a  result  of  physical  or  mental
                  illness or injury), after the Board of the Company delivers to
                  the  Executive a written  demand for  substantial  performance
                  that  specifically  identifies  the  manner in which the Board
                  believes that the Executive  has not  substantially  performed
                  the Executive's duties; or

                        B. illegal conduct or gross misconduct by the Executive,
                  in either case that is willful  and  results in  material  and
                  demonstrable  damage  to the  business  or  reputation  of the
                  Company.

                                       4
<PAGE>

No act or  failure  to act on the  part of the  Executive  shall  be  considered
"willful"  unless it is done,  or omitted to be done,  by the  Executive  in bad
faith or without  reasonable belief that the Executive's  action or omission was
in the best  interests of the  Company.  Any act or failure to act that is based
upon authority  given pursuant to a resolution duly adopted by the Board, or the
advice of counsel for the Company, shall be conclusively presumed to be done, or
omitted to be done, by the Executive in good faith and in the best  interests of
the Company.

                  (ii) A termination  of the  Executive's  employment  for Cause
shall be effected in accordance with the following procedures. The Company shall
give the Executive  written notice  ("Notice of  Termination  for Cause") of its
intention to terminate the  Executive's  employment for Cause,  setting forth in
reasonable  detail the specific  conduct of the  Executive  that it considers to
constitute  Cause and the specific  provision(s)  of this  Agreement on which it
relies,  and stating the date,  time and place of the Special  Board Meeting for
Cause. The "Special Board Meeting for Cause" means a meeting of the Board called
and held specifically for the purpose of considering the Executive's termination
for Cause,  that takes place not less than ten and not more than twenty business
days after the  Executive  receives  the  Notice of  Termination  for Case.  The
Executive shall be given an opportunity,  together with counsel,  to be heard at
the Special Board Meeting for Cause. The Executive's termination for Cause shall
be  effective  when and if a  resolution  is duly  adopted at the Special  Board
Meeting  for  Cause  by an  affirmative  vote of at  least  the  greater  of (A)
two-thirds (2/3) of the entire  membership of the Board (excluding the Executive
who shall not vote on this matter) or (B) ten (10) members of the Board, stating
that in the good  faith  opinion of the Board,  the  Executive  is guilty of the
conduct  described  in the Notice of  Termination  for Cause,  and that  conduct
constitutes Cause under this Agreement.

                  (iii) A  termination  of the  Executive's  employment  without
Cause shall be  effective  in  accordance  with the  following  procedures.  The
Company shall give the Executive written notice ("Notice of Termination  without
Cause") of its intention to terminate the Executive's  employment without Cause,
stating the date, time and place of the Special Board Meeting without Cause. The
"Special  Board Meeting  without  Cause" means a meeting of the Board called and
held  specifically  for the purpose of considering the  Executive's  termination
without  Cause,  that  takes  place not less  than ten and not more than  twenty
business days after the  Executive  receives the Notice of  Termination  without
Cause. The Executive shall be given an opportunity, together with counsel, to be
heard at the Special Board Meeting without Cause.  The  Executive's  termination
without Cause shall be effective when and if a resolution is duly adopted at the
Special Board Meeting without Cause by an affirmative vote of the greater of (A)
at least two-thirds  (2/3) of the entire  membership of the Board (excluding the
Executive  who shall not vote on this  matter)  or (B) ten  members of the Board
stating that the Executive is terminated without Cause.

            (c)   Good Reason.

                  (i) The Executive may terminate  employment for Good Reason or
without Good Reason. "Good Reason" means the occurrence (without the Executive's
express  written  consent)  of any of the  following  acts  by the  Company,  or

                                       5
<PAGE>

failures by the Company to act,  unless such act or failure to act is  corrected
within thirty days of a Notice of  Termination  for Good Reason (as that term is
defined below) given in respect thereof:

                        A.  the  Executive's  duties  and  responsibilities  are
                  materially  and  adversely  diminished  in  comparison  to the
                  duties and  responsibilities set forth in Section 2(a) of this
                  Agreement  (for  purposes  of  this  Agreement,  it  shall  be
                  considered a material and adverse  diminishment  of duties and
                  responsibilities  if the Executive  occupies the same position
                  but only with a non-publicly held company);

                        B.    any failure by the Company to comply with any
                  provision of Section 3 of this Agreement;

                        C.  any  purported   termination   of  the   Executive's
                  employment  by the  Company  for a reason  or in a manner  not
                  expressly permitted by this Agreement;

                        D.    any failure by the Company to comply with
                  paragraph (c) of Section 11 of this Agreement;

                        E.    any other substantial breach of this Agreement
                  by the Company; or

                        F.    the Executive is no longer a member of the
                  Board or the Board fails to propose the Executive for
                  re-election to the Board.

The Company and the Executive,  upon mutual written Agreement,  may waive any of
the foregoing provisions which would otherwise constitute Good Reason.

                  (ii) A  termination  of  employment  by the  Execute  for Good
Reason shall be  effectuated by giving the Company  written  notice  ("Notice of
Termination for Good Reason") of the termination  within one year (but not after
the end of the Employment Period) of the date of the event which is the basis of
the Notice of Termination  for Good Reason,  setting forth in reasonable  detail
the  specific  conduct  of the  Company  that  constitutes  Good  Reason and the
specific  provision(s)  of this  Agreement  on which  the  Executive  relies.  A
termination of employment by the Executive for Good Reason shall be effective on
the fifth  business day  following the date when the Notice of  Termination  for
Good  Reason is given,  unless the notice  sets forth a later date  (which  date
shall in no event be later than 30 days after the notice is given). For purposes
of this Section 4(c), any good faith  determination of "Good Reason" made by the
Executive shall be conclusive.

                  (iii)  A  termination  of the  Executive's  employment  by the
Executive  without Good Reason  shall be effected by giving the Company  written
notice of the termination.

                                       6
<PAGE>

            (d) No Waiver.  The failure to set forth any fact or circumstance in
a Notice of Termination  for Cause,  a Notice of Termination  without Cause or a
Notice of Termination for Good Reason shall not constitute a waiver of the right
to assert,  and shall not preclude the party giving notice from asserting,  such
fact or  circumstance  in an attempt to enforce any right under or  provision of
this Agreement.

            (e) Date of Termination. The "Date of Termination" means the date of
the  Executive's  death,  the Disability  Effective  Date, the date on which the
termination  of the  Executive's  employment by the Company for Cause or without
Cause or by the Executive for Good Reason is effective, or the date on which the
Executive  gives the Company notice of a termination of employment  without Good
Reason, as the case may be.

5. Obligations of the Company upon Termination.

            (a) By the  Company  other  than  for  Cause or  Disability;  by the
Executive  for Good  Reason.  If,  during the  Employment  Period,  the  Company
terminates the Executive's employment other than for Cause or Disability, or the
Executive  terminates  employment for Good Reason, the Company shall continue to
provide the Executive with the compensation and benefits set forth in paragraphs
(a),  (b) and (c) of Section 3 as if he had  remained  employed  by the  Company
pursuant to this  Agreement  through the end of the  Employment  Period and then
retired  (at which time he will be treated as eligible  for all retiree  welfare
benefits and other benefits provided to retired senior executives,  as set forth
in Section  3(c)(ii) and (iii);  provided,  that the Incentive  Compensation for
such period shall be based upon the target  Incentive  Compensation for the year
in which the Date of  Termination  occurs;  provided,  further,  that in lieu of
stock options,  restricted  stock and other  stock-based  awards,  the Executive
shall be paid cash equal to the fair market value as of the Date of  Termination
(without regard to any  restrictions  and based upon a valuation model generally
utilized for purposes of valuing comparable stock-based  compensation awards) of
the stock  options,  restricted  stock and other  stock-based  awards that would
otherwise  have been  granted with such cash being paid within 90 days after the
Date  of  Termination;  provided,  further  that,  to the  extent  any  benefits
described in paragraph (c) of Section 3 cannot be provided  pursuant to the plan
or program  maintained  by the Company  for its  executives,  the Company  shall
provide  such  benefits  outside  such plan or  program  at no  additional  cost
(including  without  limitation  tax cost) to the Executive and his family,  and
provided,  finally,  that  during any period when the  Executive  is eligible to
receive  benefits of the type  described in clause (B) of paragraph  (c)(iii) of
Section 3 under another  employer-provided  plan,  the benefits  provided by the
Company under paragraph (a) of Section 5 may be made secondary to those provided
under  another  plan.  In  addition  to  the  foregoing,  any  restricted  stock
outstanding on the Date of  Termination  shall be fully vested as of the Date of
Termination  and all options  outstanding  on the Date of  Termination  shall be
fully vested and exercisable and shall remain in effect and exercisable  through
the end of their  respective  terms,  without  regard to the  termination of the
Executive's  employment.  The payments and  benefits  provided  pursuant to this
paragraph (a) of Section 5 are intended as liquidated  damages for a termination
for the Executive's employment by the Company other than for Cause or Disability
or for the actions of the Company  leading to a termination  of the  Executive's
employment by the Executive for Good Reason, and shall be the sole and exclusive
remedy therefor.

                                       7
<PAGE>

            (b) Death or Disability. If the Executive's employment is terminated
by reason of the Executive's death or Disability  during the Employment  Period,
the  Company  shall pay to the  Executive,  or in the  cause of the  Executive's
death,  to the  Executive's  designated  beneficiaries  (or, if there is no such
beneficiary, to the Executive's estate or legal representative) in a lump sum in
cash  within 30 days  after the Date of  Termination,  the sum of the  following
amounts (the "Accrued  Obligations"):  (1) any portion of the Executive's Annual
Base Salary through the Date of  Termination  that has not yet been paid; (2) an
amount representing the target Incentive Compensation for the year that includes
the Date of Termination, computed by assuming that the amount of all such target
Incentive  Compensation  would be equal to the amount of such  target  Incentive
Compensation  that the  Executive  would  have  been  eligible  to earn for such
period, and multiplying that amount by a fraction, the numerator of which is the
number  of  days  in such  period  through  the  Date  of  Termination,  and the
denominator of which is the total number of days in the relevant period; (3) any
compensation  previously  deferred by the Executive  (together  with any accrued
interest or earnings  thereon)  that has not yet been paid;  and (4) any accrued
but unpaid  Incentive  Compensation and vacation pay; and the Company shall have
no further  obligations  under this Agreement,  except as specified in Section 6
below. If the Executive's  employment is terminated by reason of Disability,  he
shall be  entitled  to receive  the  maximum  disability  payments  which can be
provided under the disability  plans  described in Section  3(c)(iii),  reduced,
however, by actual disability benefits received under such plans.

            (c) By the Company for Cause;  by the Executive  other than for Good
Reason.  If the  Executive's  employment  is terminated by the Company for Cause
during the  Employment  Period,  the Company  shall pay the Executive the Annual
Base Salary through the Date of Termination  and the amount of any  compensation
previously  deferred by the  Executive  (together  with any accrued  interest or
earnings  thereon),  in each case to the  extent not yet paid,  and the  Company
shall have no further  obligations under this Agreement,  except as specified in
Section 6 below. If the Executive  voluntarily  terminates employment during the
Employment Period, other than for Good Reason, the Company shall pay the Accrued
Obligations to the Executive in a lump sum in cash within 30 days of the Date of
Termination,  and the  Company  shall  have no  further  obligations  under this
Agreement, except as specified in Section 6 below.

                                       8
<PAGE>

6.  Non-Exclusivity of Rights.  Nothing in this Agreement shall prevent or limit
the Executive's continuing or future participation in any plan, program,  policy
or practice provided by the Company or any of its affiliated companies for which
the  Executive may qualify,  nor,  subject to paragraph (f) of Section 12, shall
anything  in this  Agreement  limit  or  otherwise  affect  such  rights  as the
Executive  may have under any contract or  agreement  with the Company or any of
its affiliated  companies.  Vested benefits and other amounts that the Executive
is  otherwise  entitled  to receive  under the SERP or any other  plan,  policy,
practice or program of, or any contract or agreement with, the Company or any of
its affiliated companies on or after the Date of Termination shall be payable in
accordance with the terms of each such plan, policy, practice, program, contract
or  agreement,  as the  case  may be,  except  as  explicitly  modified  by this
Agreement.

7. Full Settlement.  The Company's  obligation to make the payments provided for
in, and otherwise to perform its  obligations  under this Agreement shall not be
affected by any set-off, counterclaim, recoupment, defense or other claim, right
or action that the Company may have against the Executive or others. In no event
shall the  Executive  be obligated  to seek other  employment  or take any other
action by way of mitigation of the amounts payable to the Executive under any of
the  provisions  of this  Agreement  and,  except as  specifically  provided  in
paragraph  (a) of Section 5 with respect to benefits  described in clause (B) of
paragraph  (c)(iii) of Section 3, such amounts shall not be reduced,  regardless
of whether the Executive obtains other employment.

8.    Non-Competition Provision and Confidential Information.

            (a) Without the prior written consent of the Company, while actively
employed, and if and only if the Executive becomes entitled to receive severance
benefits  pursuant  to  Section  5(a)  hereof,   for  24  months  following  the
termination  of the  Executive's  employment,  the  Executive  shall  not,  as a
shareholder,  officer,  director,  partner,  consultant,  or  otherwise,  engage
directly or indirectly in any business or enterprise  which is "in  competition"
with the Company or its  successors  or  assigns;  provided,  however,  that the
Executive's  ownership of less than five  percent of the issued and  outstanding
voting securities of a publicly-traded company shall not be deemed to constitute
such  competition.  A business or enterprise is deemed to be "in competition" if
it  is  engaged  in  the  business  of   generation,   purchase,   transmission,
distribution,  or  sale  of  electricity,  or  in  the  purchase,  transmission,
distribution,  sale or  transportation  of  natural  gas  within  the  States of
Colorado,  Kansas,  Minnesota, New Mexico, North Dakota, Oklahoma, South Dakota,
Texas, Wisconsin or Wyoming.

            (b) The Executive shall hold in a fiduciary capacity for the benefit
of the  Company  all  secret  or  confidential  information,  knowledge  or data
relating to the Company or any of its affiliated  companies and their respective
businesses that the Executive  obtains during the Executive's  employment by the
Company or any of its  affiliated  companies  and that is not  public  knowledge
(other  than  as a  result  of the  Executive's  violation  of this  Section  8)
("Confidential  Information").  The Executive shall not communicate,  divulge or
disseminate Confidential Information at any time during or after the Executive's
employment  with the  Company,  except  with the prior  written  consent  of the
Company or as otherwise required by law or legal process.  In no event shall any
 
                                      9
<PAGE>

asserted  violation of the  provisions  of this Section 8 constitute a basis for
deferring or withholding  any amounts  otherwise  payable to the Executive under
this Agreement.

9. Certain Additional Payments by the Company.

            (a) Anything in this Agreement to the contrary  notwithstanding,  in
the event it shall be determined that any payment or distribution by the Company
to or for the benefit of the Executive  (whether paid or payable or  distributed
or  distributable  pursuant to the terms of this  Agreement  or  otherwise,  but
determined with regard to any additional payments required under this Section 9)
(a "Payment")  would be subject to the excise tax imposed by Section 4999 of the
Internal  Revenue  Code of 1986,  as amended  (the  "Code"),  or any interest or
penalties  are incurred by the  Executive  with respect to such excise tax (such
excise tax,  together  with any such  interest and  penalties,  are  hereinafter
collectively  referred  to as the "Excise  Tax"),  then the  Executive  shall be
entitled to receive an  additional  payment (a "Gross-Up  Payment") in an amount
such that after payment by the Executive of all taxes (including any interest or
penalties imposed with respect to such taxes) including, without limitation, any
income taxes (and any interest and penalties  imposed with respect  thereto) and
Excise Tax imposed upon the Gross-Up Payment, the Executive retains an amount of
the Gross-Up Payment equal to the Excise Tax imposed upon the Payments.

            (b) Subject to the  provisions  of paragraph  (c) of this Section 9,
all  determinations  required to be made under this Section 9, including whether
and when a Gross-Up  Payment is required and the amount of such Gross-Up Payment
and the assumptions to be utilized in arriving at such  determination,  shall be
made by  Arthur  Andersen  LLP (the  "Accounting  Firm"),  which  shall  provide
detailed supporting calculations both to the Company and the Executive within 15
business days of the receipt of notice from the Executive  that there has been a
Payment,  or such earlier  time as is  requested  by the  Company.  All fees and
expenses  of the  Accounting  Firm  shall be borne  solely by the  Company.  Any
Gross-Up Payment, as determined pursuant to this Section 9, shall be paid by the
Company to the  Executive  within  five days of the  receipt  of the  Accounting
Firm's determination.  Any determination by the Accounting Firm shall be binding
upon the  Company  and the  Executive.  As a result  of the  uncertainty  in the
application of Section 4999 of the Code at the time of the initial determination
by the Accounting  Firm hereunder,  it is possible that Gross-Up  Payments which
will not have been made by the Company  should  have been made  ("Underpayment")
consistent with the  calculations  required to be made  hereunder.  In the event
that the Company exhausts its remedies pursuant to paragraph (c) of this Section
9 and the Executive  thereafter is required to make a payment of any Excise Tax,
the  Accounting  Firm shall  determine the amount of the  Underpayment  that has
occurred and any such  Underpayment  shall be promptly paid by the Company to or
for the benefit of the Executive.

            (c) The  Executive  shall notify the Company in writing of any claim
by the Internal  Revenue Service that, if successful,  would require the payment
by the Company of the Gross-Up Payment. Such notification shall be given as soon
as  practicable  but not later than ten  business  days after the  Executive  is
informed in writing of such claim and shall apprise the Company of the nature of

                                       10

<PAGE>

such  claim  and the  date on which  such  claim is  requested  to be paid.  The
Executive  shall not pay such claim prior to the expiration of the 30-day period
following the date on which it gives such notice to the Company (or such shorter
period  ending on the date that any payment of taxes with  respect to such claim
is  due).  If the  Company  notifies  the  Executive  in  writing  prior  to the
expiration  of such period that it desires to contest such claim,  the Executive
shall:

                  (i)   give the Company any information reasonably requested
            by the Company relating to such claim;

                  (ii) take such action in connection with contesting such claim
            as the  Company  shall  reasonably  request in writing  from time to
            time, including, without limitation,  accepting legal representation
            with respect to such claim by an attorney reasonably selected by the
            Company;

                  (iii)  cooperate  with  the  Company  in good  faith  in order
            effectively to contest such claim; and

                  (iv)  permit the  Company to  participate  in any  proceedings
            relating to such claim;

provided,  however,  that the Company  shall bear and pay directly all costs and
expenses  (including  additional  interest and penalties) incurred in connection
with such contest and shall  indemnify  and hold the Executive  harmless,  on an
after-tax  basis,  for any  Excise  Tax or income tax  (including  interest  and
penalties with respect thereto) imposed as a result of such  representation  and
payment of costs and expenses. Without limitation on the foregoing provisions of
this paragraph (c) of Section 9, the Company shall control all proceedings taken
in connection with such contest and, at its sole option, may pursue or forgo any
and all administrative appeals,  proceedings,  hearings and conferences with the
taxing  authority in respect of such claim and may, at its sole  option,  either
direct the  Executive to pay the tax claimed and sue for a refund or contest the
claim in any  permissible  manner,  and the Executive  agrees to prosecute  such
contest to a determination  before any  administrative  tribunal,  in a court of
initial  jurisdiction and in one or more appellate  courts, as the Company shall
determine,  provided,  however, that if the Company directs the Executive to pay
such claim and sue for a refund,  the Company  shall  advance the amount of such
payment to the Executive, on an interest-free basis and shall indemnify and hold
the Executive harmless, on an after-tax basis, from any Excise Tax or income tax
(including  interest or penalties with respect  thereto) imposed with respect to
such advance or with respect to any imputed income with respect to such advance;
and provided, further, that any extension of the statute of limitations relating
to payment of taxes for the taxable year of the Executive  with respect to which
such  contested  amount is claimed to be due is limited solely to such contested
amount.  Furthermore,  the Company's  control of the contest shall be limited to
issues with respect to which a Gross-Up  Payment would be payable  hereunder and
the  Executive  shall be entitled to settle or contest,  as the case may be, any
other  issue  raised  by  the  Internal  Revenue  Service  or any  other  taxing
authority.

                                       11
<PAGE>

            (d) If, after the receipt by the Executive of an amount  advanced by
the Company  pursuant to paragraph (c) of this Section 9, the Executive  becomes
entitled to receive any refund with respect to such claim,  the Executive  shall
(subject to the Company's  complying with the  requirements  of paragraph (c) of
this Section 9) promptly pay to the Company the amount of such refund  (together
with any interest paid or credited thereon after taxes applicable  thereto).  If
after the receipt by the Executive of an amount advanced by the Company pursuant
to paragraph (c) of this Section 9, a  determination  is made that the Executive
shall not be entitled  to any refund with  respect to such claim and the Company
does not notify the Executive in writing of its intent to contest such denial of
refund prior to the  expiration of 30 days after such  determination,  then such
advance  shall be forgiven and shall not be required to be repaid and the amount
of such advance  shall  offset,  to the extent  thereof,  the amount of Gross-Up
Payment required to be paid.

10.  Attorney's  Fees.  The Company  agrees to pay, as incurred,  to the fullest
extent  permitted  by law, all legal fees and expenses  that the  Executive  may
reasonably  incur as a result of any  contest  regardless  of the outcome by the
Company,  the  Executive  or  others of the  validity  or  enforceability  of or
liability  under  or  otherwise  involving,  any  provision  of this  Agreement,
together with  interest on any delayed  payment at the  applicable  federal rate
provided for in Section 7872(f)(2)(A) of the Code.

11.   Successors.

            (a) This  Agreement is personal to the  Executive  and,  without the
prior written  consent of the Company,  shall not be assignable by the Executive
otherwise than by will or the laws of descent and  distribution.  This Agreement
shall  inure to the  benefit  of and be  enforceable  by the  Executive's  legal
representatives.

            (b) This Agreement shall inure to the benefit of and be binding upon
the Company and its successors and assigns.

            (c) The Company  shall  require  any  successor  (whether  direct or
indirect,   by  purchase,   merger,   consolidation  or  otherwise)  to  all  or
substantially  all of the  business  and/or  assets of the Company  expressly to
assume and agree to perform  this  Agreement  in the same manner and to the same
extent  that the  Company  would  have been  required  to  perform it if no such
succession had taken place. As used in this Agreement, "Company" shall mean both
the Company as defined above and any such  successor  that assumes and agrees to
perform this Agreement, by operation of law or otherwise.

12.   Miscellaneous.

            (a) This Agreement shall be governed by, and construed in accordance
with,  the laws of the State of  Minnesota,  without  reference to principles of
conflict of laws.  The captions of this Agreement are not part of the provisions
hereof and shall have no force and effect.  This Agreement may not be amended or
modified except by a written  agreement  executed by the parties hereto or their
respective successors and legal representatives.

                                       12
<PAGE>

            (b) All notices and other  communications under this Agreement shall
be in  writing  and shall be given by hand  delivery  to the  other  party or by
registered  or  certified  mail,  return  receipt  requested,  postage  prepaid,
addressed as follows:

      If to the Executive:    Wayne H. Brunetti




      If to the Company:      Northern States Power Company
                              414 Nicollet Mall
                              Minneapolis, Minnesota 55401
                              Attention: General Counsel

or to such other  address as either  party  furnishes to the other in writing in
accordance  with this  paragraph (b) of Section 12.  Notices and  communications
shall be effective when actually received by the addressee.

            (c) The  invalidity  or  unenforceability  of any  provision of this
Agreement shall not affect the validity or enforceability of any other provision
of this  Agreement.  If any provision of this Agreement shall be held invalid or
unenforceable  in part, the remaining  portion of such provision,  together with
all other  provisions of this Agreement,  shall remain valid and enforceable and
continue in full force and effect to the fullest extent consistent with law.

            (d)  Notwithstanding  any other  provision  of this  Agreement,  the
Company may withhold  from amounts  payable  under this  Agreement  all federal,
state,  local and foreign  taxes that are required to be withheld by  applicable
laws or regulations.

            (e) The  Executive's or the Company's  failure to insist upon strict
compliance  with any provision of, or to assert any right under,  this Agreement
(including,  without  limitation,  the  right  of  the  Executive  to  terminate
employment  for Good  Reason  pursuant  to  paragraph  (c) of  Section 4 of this
Agreement)  shall not be deemed to be a waiver of such  provision or right or of
any other provision of or right under this Agreement.

            (f) The Executive and the Company  acknowledge  that this  Agreement
supersedes and terminates any other severance and employment  agreements between
the Executive and the Company,  NCE and their respective  affiliates,  except as
specifically  provided in Section 1 hereof.  Without  limiting the generality of
the foregoing,  the Executive  hereby  expressly  waived any right that he might
otherwise have to receive any payments or benefits under the Severance Policies.

            (g) The rights and benefits of the  Executive  under this  Agreement
may  not  be  anticipated,   assigned,   alienated  or  subject  to  attachment,
garnishment,  levy,  execution  or other legal or  equitable  process  except as
required by law. Any attempt by the Executive to anticipate,  alienate,  assign,
sell,  transfer,  pledge,  encumber  or charge the same shall be void.  Payments

                                       13
<PAGE>

hereunder  shall  not be  considered  assets  of the  Executive  in the event of
insolvency or bankruptcy.

            (h) This Agreement may be executed in several counterparts,  each of
which shall be deemed an original,  and said  counterparts  shall constitute but
one and the same instrument.


                                       14
<PAGE>


            IN WITNESS  WHEREOF,  the Executive has hereunto set the Executive's
hand and, pursuant to the authorization of their respective Boards of Directors,
the Company and NCE have caused this  Agreement to be executed in their names on
their behalf, all as of the day and year first above written.



                                          /s/Wayne H. Brunetti
                                       ---------------------------
                                       Wayne H. Brunetti


                                       NORTHERN STATES POWER COMPANY



                                       By:  /s/ Grant P. Butts
                                            Name:  Grant P. Butts
                                            Title: VP-Human Resources


                                       NEW CENTURY ENERGIES, INC.


                                       By:  /s/Bill D. Helton
                                            Name:  Bill D. Helton
                                            Title: Chairman and 
                                                   Chief Executive Officer
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE>                         UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION EXTRACTED FROM NEW CENTURY
ENERGIES,  INC.  CONSOLIDATED  CONDENSED  BALANCE SHEET AS OF MARCH 31, 1999 AND
CONSOLIDATED  CONDENSED  STATMENTS OF INCOME AND CASH FLOWS FOR THE THREE MONTHS
ENDED MARCH 31, 1999 AND IS  QUALIFIED  IN ITS  ENTIRETY  BY  REFERENCE  TO SUCH
FINANCIAL STATMENTS.
</LEGEND>
<MULTIPLIER>                            1,000
       
<S>                               <C>
<PERIOD-TYPE>                           3-MOS
<FISCAL-YEAR-END>                 DEC-31-1998
<PERIOD-END>                      MAR-31-1999
<BOOK-VALUE>                         PER-BOOK
<TOTAL-NET-UTILITY-PLANT>           5,929,230
<OTHER-PROPERTY-AND-INVEST>           419,063
<TOTAL-CURRENT-ASSETS>                757,227
<TOTAL-DEFERRED-CHARGES>              588,872
<OTHER-ASSETS>                              0
<TOTAL-ASSETS>                      7,694,392
<COMMON>                              114,925
<CAPITAL-SURPLUS-PAID-IN>           1,769,762
<RETAINED-EARNINGS>                   775,016
<TOTAL-COMMON-STOCKHOLDERS-EQ>      2,656,847
                 294,000
                                 0
<LONG-TERM-DEBT-NET>                2,269,702
<SHORT-TERM-NOTES>                     69,500
<LONG-TERM-NOTES-PAYABLE>                   0
<COMMERCIAL-PAPER-OBLIGATIONS>        339,400
<LONG-TERM-DEBT-CURRENT-PORT>         121,293
                   0
<CAPITAL-LEASE-OBLIGATIONS>            35,283
<LEASES-CURRENT>                        3,184
<OTHER-ITEMS-CAPITAL-AND-LIAB>      1,905,183
<TOT-CAPITALIZATION-AND-LIAB>       7,694,392
<GROSS-OPERATING-REVENUE>             991,423
<INCOME-TAX-EXPENSE>                   37,115
<OTHER-OPERATING-EXPENSES>            814,131
<TOTAL-OPERATING-EXPENSES>            814,131
<OPERATING-INCOME-LOSS>               177,292
<OTHER-INCOME-NET>                     12,269
<INCOME-BEFORE-INTEREST-EXPEN>        189,561
<TOTAL-INTEREST-EXPENSE>               51,146
<NET-INCOME>                          101,300
                 0
<EARNINGS-AVAILABLE-FOR-COMM>               0
<COMMON-STOCK-DIVIDENDS>               66,961
<TOTAL-INTEREST-ON-BONDS>              41,410
<CASH-FLOW-OPERATIONS>                232,082
<EPS-PRIMARY>                            0.88
<EPS-DILUTED>                            0.88
        

</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE>                          UT
<LEGEND>
THIS SCHEDULE  CONTAINS  SUMMARY  FINANCIAL  INFORMATION  EXTRACTED  FROM PUBLIC
SERVICE  COMPANY OF COLORADO AND  SUBSIDIARIES  CONSOLIDATED  CONDENSED  BALANCE
SHEET AS OF MARCH 31, 1999 AND CONSOLIDATED  CONDENSED  STATEMENTS OF INCOME AND
CASH FLOWS FOR THE THREE  MONTHS  ENDED MARCH 31, 1999 AND IS  QUALIFIED  IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                             1,000
       
<S>                                <C>
<PERIOD-TYPE>                            3-MOS
<FISCAL-YEAR-END>                  DEC-31-1998
<PERIOD-END>                       MAR-31-1999
<BOOK-VALUE>                          PER-BOOK
<TOTAL-NET-UTILITY-PLANT>            4,085,947
<OTHER-PROPERTY-AND-INVEST>            210,743
<TOTAL-CURRENT-ASSETS>                 438,813
<TOTAL-DEFERRED-CHARGES>               365,110
<OTHER-ASSETS>                               0
<TOTAL-ASSETS>                       5,100,613
<COMMON>                                     0
<CAPITAL-SURPLUS-PAID-IN>            1,302,119
<RETAINED-EARNINGS>                    344,650
<TOTAL-COMMON-STOCKHOLDERS-EQ>       1,646,769
                  194,000
                                  0
<LONG-TERM-DEBT-NET>                 1,602,679
<SHORT-TERM-NOTES>                           0
<LONG-TERM-NOTES-PAYABLE>                    0
<COMMERCIAL-PAPER-OBLIGATIONS>         339,400
<LONG-TERM-DEBT-CURRENT-PORT>           30,451
                    0
<CAPITAL-LEASE-OBLIGATIONS>             35,246
<LEASES-CURRENT>                         3,069
<OTHER-ITEMS-CAPITAL-AND-LIAB>       1,248,999
<TOT-CAPITALIZATION-AND-LIAB>        5,100,613
<GROSS-OPERATING-REVENUE>              659,419
<INCOME-TAX-EXPENSE>                    29,214
<OTHER-OPERATING-EXPENSES>             526,020
<TOTAL-OPERATING-EXPENSES>             555,234
<OPERATING-INCOME-LOSS>                104,185
<OTHER-INCOME-NET>                      (1,566)
<INCOME-BEFORE-INTEREST-EXPEN>         102,619
<TOTAL-INTEREST-EXPENSE>                36,680
<NET-INCOME>                            65,939
                  0
<EARNINGS-AVAILABLE-FOR-COMM>           65,939
<COMMON-STOCK-DIVIDENDS>                46,502
<TOTAL-INTEREST-ON-BONDS>               29,833
<CASH-FLOW-OPERATIONS>                 208,908
<EPS-PRIMARY>                            0.000
<EPS-DILUTED>                            0.000
        

</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE>                          UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SOUTHWESTERN
PUBLIC  SERVICE  COMPANY  CONDENSED  BALANCE  SHEET  AS OF  MARCH  31,  1999 AND
CONDENSED  STATEMENTS  OF INCOME AND CASH FLOWS FOR THE THREE MONTHS ENDED MARCH
31,  1999 AND IS  QUALIFIED  IN ITS  ENTIRETY  BY  REFERENCE  TO SUCH  FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER>                             1,000
       
<S>                                <C>
<PERIOD-TYPE>                            3-MOS
<FISCAL-YEAR-END>                  DEC-31-1998
<PERIOD-END>                       MAR-31-1999
<BOOK-VALUE>                          PER-BOOK
<TOTAL-NET-UTILITY-PLANT>            1,738,600
<OTHER-PROPERTY-AND-INVEST>            124,681
<TOTAL-CURRENT-ASSETS>                 141,864
<TOTAL-DEFERRED-CHARGES>               164,066
<OTHER-ASSETS>                               0
<TOTAL-ASSETS>                       2,169,211
<COMMON>                                     0
<CAPITAL-SURPLUS-PAID-IN>              348,402
<RETAINED-EARNINGS>                    393,184
<TOTAL-COMMON-STOCKHOLDERS-EQ>         741,586
                  100,000
                                  0
<LONG-TERM-DEBT-NET>                   630,498
<SHORT-TERM-NOTES>                       9,000
<LONG-TERM-NOTES-PAYABLE>                    0
<COMMERCIAL-PAPER-OBLIGATIONS>               0
<LONG-TERM-DEBT-CURRENT-PORT>           90,113
                    0
<CAPITAL-LEASE-OBLIGATIONS>                  0
<LEASES-CURRENT>                             0
<OTHER-ITEMS-CAPITAL-AND-LIAB>         598,014
<TOT-CAPITALIZATION-AND-LIAB>        2,169,211
<GROSS-OPERATING-REVENUE>              202,552
<INCOME-TAX-EXPENSE>                    14,365
<OTHER-OPERATING-EXPENSES>             152,818
<TOTAL-OPERATING-EXPENSES>             167,183
<OPERATING-INCOME-LOSS>                 35,369
<OTHER-INCOME-NET>                       2,080
<INCOME-BEFORE-INTEREST-EXPEN>          37,449
<TOTAL-INTEREST-EXPENSE>                14,058
<NET-INCOME>                            23,391
                  0
<EARNINGS-AVAILABLE-FOR-COMM>           23,391
<COMMON-STOCK-DIVIDENDS>                20,024
<TOTAL-INTEREST-ON-BONDS>               10,643
<CASH-FLOW-OPERATIONS>                  49,767
<EPS-PRIMARY>                            0.000
<EPS-DILUTED>                            0.000
        

</TABLE>


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