PUBLIC SERVICE CO OF COLORADO
10-Q, 1999-08-16
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 June 30, 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 August 13, 1999,  115,254,671  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 $3,788,997,309.

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 ............................   39


                          PART II - OTHER INFORMATION


Item 1.  Legal Proceedings..............................................   59

Item 6.  Exhibits and Reports on Form 8-K...............................   59








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........................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
NOx...............................................................Nitrogen Oxide
NSP................................................Northern States Power Company
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.
Y2K....................................................................Year 2000
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

                                                          June 30,  December 31,
                                                            1999        1998
                                                            ----        ----
Property, plant and equipment, at cost:
   Electric ..........................................   $7,357,881  $7,097,070
   Gas................................................    1,281,283   1,210,605
   Steam and other....................................      117,647     111,620
   Common to all departments..........................      470,895     423,287
   Construction in progress...........................      278,083     391,100
                                                            -------     -------
                                                          9,505,789   9,233,682
   Less: accumulated depreciation ....................    3,471,139   3,351,659
                                                          ---------   ---------
     Total property, plant and equipment..............    6,034,650   5,882,023
                                                          ---------   ---------



Investments, at cost:
   Investment in Yorkshire Power and other
     unconsolidated subsidiaries (Note 3).............      340,142     340,874
   Other..............................................       77,757      64,562
                                                            -------      ------
    Total investments.................................      417,899     405,436
                                                            -------     -------


Current assets:
   Cash and temporary cash investments................       72,157      56,667
   Accounts receivable, less reserve for uncollectible
     accounts ($4,353 at June 30, 1999; $4,842 at
     December 31, 1998)...............................      312,056     319,145
   Accrued unbilled revenues..........................      120,486     130,455
   Recoverable purchased gas and electric energy costs        6,092      66,154
   Materials and supplies, at average cost............       74,541      69,298
   Fuel inventory, at average cost....................       32,022      24,653
   Gas in underground storage, at cost (LIFO).........       21,592      52,624
   Prepaid expenses and other.........................       74,585      83,561
                                                            -------      ------
    Total current assets..............................      713,531     802,557
                                                            -------     -------

Deferred charges:
   Regulatory assets (Note 1).........................      362,221     381,632
   Unamortized debt expense...........................       27,885      27,408
   Other..............................................      198,544     172,908
                                                            -------     -------
    Total deferred charges............................      588,650     581,948
                                                            -------     -------
                                                         $7,754,730  $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

                                                          June 30,  December 31,
                                                            1999        1998
                                                            ----        ----

Common stock..........................................   $1,896,515  $1,866,386
Retained earnings.....................................      757,396     740,677
Accumulated other comprehensive income (Note 1).......       (9,410)      7,764
                                                            -------      ------
    Total common equity...............................    2,644,501   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 .......................    2,126,729   2,205,545
                                                          ---------   ---------
                                                          5,065,230   5,114,372
                                                          ---------   ---------

Noncurrent liabilities:
 Employees' postretirement benefits other than pensions      63,840      61,732
 Employees' postemployment benefits ................         31,343      31,326
                                                             ------      ------
    Total noncurrent liabilities......................       95,183      93,058
                                                             ------      ------

Current liabilities:
 Notes payable and commercial paper ................        544,097     524,394
 Long-term debt due within one year.................        308,972     138,165
 Accounts payable...................................        269,152     285,080
 Dividends payable..................................         69,707      69,271
 Recovered electric energy costs....................         13,907      18,760
 Customers' deposits................................         30,919      30,793
 Accrued taxes......................................         26,589      85,384
 Accrued interest...................................         56,734      50,229
 Other..............................................        119,687     122,747
                                                            -------     -------
    Total current liabilities.........................    1,439,764   1,324,823
                                                          ---------   ---------

Deferred credits:
 Customers' advances for construction...............         57,194      55,400
 Unamortized investment tax credits ................         98,374     100,925
 Accumulated deferred income taxes..................        961,362     947,247
 Other..............................................         37,623      36,139
                                                            -------      ------
    Total deferred credits............................    1,154,553   1,139,711
                                                          ---------   ---------

Commitments and contingencies (Notes 4 and 5).........   ----------  ----------
                                                         $7,754,730  $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
                                                                 June 30,
                                                               1999      1998
                                                               ----      ----

Operating revenues:
   Electric...........................................     $607,277   $ 642,812
   Gas................................................      173,172     166,421
   Other..............................................       20,385      21,726
                                                            -------     ------
                                                            800,834     830,959

Operating expenses:
  Fuel used in generation............................       152,857     171,280
  Purchased power....................................       130,635     137,240
  Cost of gas sold...................................       114,502     112,689
  Other operating and maintenance expenses-regulated.       137,040     139,075
  Other operating and maintenance expenses-nonregulated      28,308      23,892
  Depreciation and amortization......................        69,895      67,074
  Taxes (other than income taxes) ...................        37,477      33,043
                                                            -------      ------
                                                            670,714     684,293
                                                            -------     -------
Operating income......................................      130,120     146,666

Other income and deductions:
  Equity in earnings (losses) of Yorkshire Power and
   other unconsolidated subsidiaries (Note 3).........       (2,787)     (7,569)
   Miscellaneous income and deductions - net..........       (2,609)      1,023
                                                             ------      ------
                                                             (5,396)     (6,546)

Interest charges and preferred dividends of subsidiaries:
  Interest on long-term debt.........................        43,942      42,718
  Other interest.....................................         7,362       8,958
  Allowance for borrowed funds used during construction      (2,611)     (4,415)
  Dividends on PSCo and SPS obligated mandatorily
   redeemable preferred securities of subsidiary
   trusts holding solely subordinated debentures of
   PSCo and SPS ......................................        5,762       4,073
  Dividend requirements on preferred stock of
   subsidiaries ......................................            -       2,403
                                                               ----       -----
                                                             54,455      53,737

Income before income taxes............................       70,269      86,383
Income taxes..........................................       21,034      29,790
                                                            -------      ------
Net income............................................      $49,235     $56,593
                                                            =======     =======

Weighted average common shares outstanding:
  Basic..............................................       115,080     111,372
  Diluted............................................       115,103     111,528

Basic and diluted earnings per share of common stock
  outstanding .......................................        $ 0.43      $ 0.50
                                                             ======      ======


      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 INCOME
                                   (Unaudited)
                             (Thousands of Dollars)

                                                             Six Months Ended
                                                                 June 30,
                                                              1999      1998
                                                               ----      ----

Operating revenues:
   Electric...........................................   $1,201,808  $1,227,658
   Gas................................................      478,307     477,783
   Other..............................................       35,414      41,535
                                                            -------      ------
                                                          1,715,529   1,746,976

Operating expenses:
   Fuel used in generation............................      286,706     312,199
   Purchased power....................................      257,879     270,962
   Cost of gas sold...................................      333,581     329,256
   Other operating and maintenance expenses-regulated.      266,466     268,680
   Other operating and maintenance expenses-nonregulated     48,991      41,968
   Depreciation and amortization......................      139,397     129,492
   Taxes (other than income taxes) ...................       75,097      65,916
                                                            -------      ------
                                                          1,408,117   1,418,473
                                                          ---------   ---------
Operating income......................................      307,412     328,503

Other income and deductions:
   Equity in earnings (losses) of Yorkshire Power and
    other unconsolidated subsidiaries (Note 3)........       13,024      (3,817)
   Miscellaneous income and deductions - net..........       (6,151)     (1,945)
                                                            -------      ------
                                                              6,873      (5,762)

Interest charges and preferred dividends of subsidiaries:
   Interest on long-term debt.........................       85,352      83,191
   Other interest.....................................       14,251      17,452
   Allowance for borrowed funds used during construction     (5,527)     (8,921)
   Dividends on PSCo and SPS obligated mandatorily
    redeemable  preferred securities of subsidiary
    trusts holding solely subordinated debentures of
    PSCo and SPS .....................................       11,525       6,036
   Dividend requirements on preferred stock of
    subsidiaries                                                  -       5,332
                                                               ----       -----
                                                            105,601     103,090

Income before income taxes............................      208,684     219,651
Income taxes..........................................       58,149      76,909
                                                            -------      ------
Net income............................................     $150,535    $142,742
                                                           ========    ========

Weighted average common shares outstanding:
   Basic..............................................      114,881     111,174
   Diluted............................................      114,916     111,332

Basic and diluted earnings per share of common stock
  outstanding ........................................       $ 1.31      $ 1.28
                                                             ======      ======


      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)


                                                              Six Months Ended
                                                                  June 30,
                                                               1999      1998
                                                               ----      ----

Operating activities:
   Net income.........................................       $150,535  $142,742
   Adjustments to reconcile net income to net cash
     provided  by  operating activities:
     Depreciation and amortization....................        145,934   134,512
     Amortization of investment tax credits...........         (2,551)   (2,558)
     Deferred income taxes............................         15,003     4,598
     Equity in earnings of Yorkshire Power and other
      unconsolidated subsidiaries, net ...............        (13,024)    3,817
     Allowance for equity funds used during construction         (827)        -
     Change in accounts receivable....................          7,089    12,845
     Change in inventories............................         18,420    19,184
     Change in other current assets...................         82,069    52,508
     Change in accounts payable.......................        (15,928)  (58,842)
     Change in other current liabilities..............        (52,103)   (4,727)
     Change in deferred amounts.......................        (22,186)   53,688
     Change in noncurrent liabilities.................          2,124     4,959
     Other............................................             84        45
                                                              -------   -------
       Net cash provided by operating activities......        314,639   362,771

Investing activities:
   Construction expenditures..........................       (287,650) (261,302)
   Allowance for equity funds used during construction            827         -
   Proceeds from disposition of property, plant
     and equipment ...................................            512     2,848
   Acquisition of subsidiary, net of cash acquired (Note 3)         -   (13,725)
   Purchase of other investments......................        (11,809)   (2,014)
   Sale of other investments..........................          2,402     3,426
                                                              -------   -------
       Net cash used in investing activities..........       (295,718) (270,767)

Financing activities:
   Proceeds from sale of common stock.................         20,532    23,976
   Proceeds from sale of PSCo obligated mandatorily
     redeemable preferred securities .................              -   194,000
   Proceeds from sale of long-term debt...............        156,488   248,380
   Redemption of long-term debt.......................        (66,774)  (80,392)
   Short-term borrowings - net........................         19,702  (134,281)
   Redemption of preferred stock (Note 1).............              -  (181,824)
   Dividends on common stock..........................       (133,379) (126,905)
                                                             --------  --------
       Net cash used in financing activities..........         (3,431)  (57,046)
                                                              -------   -------
       Net increase in cash and temporary
         cash investments ............................         15,490    34,958
       Cash and temporary cash investments at beginning
         of period ...................................         56,667    72,623
                                                               ------    ------
       Cash and temporary cash investments at end
         of period ...................................       $ 72,157  $107,581
                                                             ========  ========



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


                                       5
<PAGE>


                   NEW CENTURY ENERGIES, INC. AND SUBSIDIARIES
            CONSOLIDATED CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY
                    Three Months Ended June 30, 1999 and 1998
                                   (Unaudited)
                (Thousands of Dollars, Except Share Information)

<TABLE>
<CAPTION>
                                                                                          Accumulated
                                  Common Stock, $1 par value      Paid                      Other
                                  --------------------------       in        Retained     Comprehensive
                                     Shares      Amount          Capital     Earnings       Income           Total
                                     ------      ------          -------     --------       ------           -----
<S>                              <C>            <C>          <C>            <C>           <C>            <C>
Balance at March 31, 1998        111,239,530    $  111,240   $1,604,912     $ 680,666     $ 9,402        $2,406,220
Comprehensive income (Note 1):
  Net income..........                     -             -            -        56,593           -            56,593
  Foreign currency translation
   adjustment.........                     -             -            -             -      (3,778)           (3,778)
                                                                                                           --------
      Comprehensive income                                                                                   52,815

Dividends declared on common stock         -             -            -       (64,541)          -           (64,541)
Issuance of common stock             252,388           252       10,877             -           -            11,129
                                     -------       -------      -------       -------     -------            ------

Balance at June 30,1998          111,491,918    $  111,492   $1,615,789     $ 672,718     $ 5,624        $2,405,623
                               =============    ==========   ==========     =========     =======        ==========


Balance at March 31, 1999        114,924,982    $  114,925   $1,769,762     $ 775,016     $(2,856)       $2,656,847
Comprehensive income (Note 1):
  Net income..........                     -             -            -        49,235           -            49,235
  Foreign currency translation
   adjustment.........                     -             -            -             -      (6,554)           (6,554)
                                                                                                            -------
      Comprehensive income                                                                                   42,681

Dividends declared on common stock         -             -            -       (66,855)          -           (66,855)
Issuance of common stock             317,286           317       11,511             -           -            11,828
                                     -------       -------      -------       -------      ------            ------

Balance at June 30,1999          115,242,268    $  115,242   $1,781,273     $ 757,396     $(9,410)       $2,644,501
                               =============    ==========   ==========     =========     =======        ==========
</TABLE>

Authorized shares of common stock were 260 million at June 30, 1999 and 1998.

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


                                       6
<PAGE>


                   NEW CENTURY ENERGIES, INC. AND SUBSIDIARIES
            CONSOLIDATED CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY
                     Six Months Ended June 30, 1999 and 1998
                                   (Unaudited)
                (Thousands of Dollars, Except Share Information)

<TABLE>
<CAPTION>
                                                                                          Accumulated
                                  Common Stock, $1 par value      Paid                      Other
                                  --------------------------       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 (Note 1):
  Net income..........                     -             -            -       142,742            -          142,742
  Foreign currency translation
   adjustment.........                     -             -            -             -        1,482            1,482
                                                                                                              -----
      Comprehensive income                                                                                  144,224

Dividends declared on common stock         -             -            -      (129,074)           -         (129,074)
Issuance of common stock             742,617           743       32,343             -            -           33,086
                                     -------       -------       ------       -------      -------           ------

Balance at June 30,1998          111,491,918    $  111,492   $1,615,789     $ 672,718     $  5,624       $2,405,623
                                 ===========    ==========   ==========     =========     ========       ==========


Balance at December 31, 1998     114,490,772    $  114,491   $1,751,895     $ 740,677     $  7,764       $2,614,827
Comprehensive income (Note 1):
  Net income..........                     -             -            -       150,535            -          150,535
  Foreign currency translation
   adjustment.........                     -             -            -             -      (17,174)         (17,174)
                                                                                                            -------
      Comprehensive income                                                                                  133,361

Dividends declared on common stock         -             -            -      (133,517)           -         (133,517)
Issuance of common stock             751,496           751       29,079             -            -           29,830
                                     -------           ---       ------       -------      -------           ------

Balance at June 30,1999          115,242,268    $  115,242   $1,780,974     $ 757,695     $ (9,410)      $2,644,501
                               =============    ==========   ==========     =========     ========       ==========

</TABLE>

Authorized shares of common stock were 260 million at June 30, 1999 and 1998.

      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 BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)

                                     ASSETS

                                                         June 30,   December 31,
                                                           1999       1998
                                                           ----       ----
Property, plant and equipment, at cost:
   Electric ..........................................   $4,543,488  $4,369,134
   Gas................................................    1,239,871   1,171,198
   Steam and other....................................       68,954      71,986
   Common to all departments..........................      465,942     418,484
   Construction in progress...........................      181,441     264,752
                                                            -------     -------
                                                          6,499,696   6,295,554
   Less: accumulated depreciation ....................    2,330,909   2,241,165
                                                          ---------   ---------
     Total property, plant and equipment..............    4,168,787   4,054,389
                                                          ---------   ---------

Investments, at cost:
   Note receivable from affiliate (Note 3)............      192,620     192,620
   Other..............................................       22,783      22,664
                                                            -------      ------
    Total investments.................................      215,403     215,284
                                                            -------     -------

Current assets:
   Cash and temporary cash investments................       38,570      19,926
   Accounts receivable, less reserve for uncollectible
     accounts ($2,343 at June 30,1999; $2,254 at
     December 31, 1998) ...... .......................      155,377     172,587
   Accrued unbilled revenues .........................       85,603     119,856
   Recoverable purchased gas and electric energy costs        5,359      62,761
   Materials and supplies, at average cost............       52,415      47,881
   Fuel inventory, at average cost....................       29,730      22,361
   Gas in underground storage, at cost (LIFO).........       21,147      51,779
   Prepaid expenses and other.........................       35,659      46,523
                                                             ------      ------
    Total current assets..............................      423,860     543,674
                                                            -------     -------

Deferred charges:
   Regulatory assets (Note 1).........................      253,199     269,112
   Unamortized debt expense ..........................       18,030      17,874
   Other..............................................       82,692      77,303
                                                            -------      ------
    Total deferred charges............................      353,921     364,289
                                                            -------     -------
                                                         $5,161,971  $5,177,636
                                                         ==========  ==========



      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 BALANCE SHEETS
                                   (Unaudited)
                             (Thousands of Dollars)

                             CAPITAL AND LIABILITIES

                                                         June 30,   December 31,
                                                           1999         1998
                                                           ----         ----


Common stock..........................................   $1,302,119  $1,302,119
Retained earnings.....................................      334,883     325,213
                                                            -------     -------
    Total common equity...............................    1,637,002   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........................................    1,452,564   1,643,130
                                                          ---------   ---------
                                                          3,283,566   3,464,462

Noncurrent liabilities:
   Employees' postretirement benefits other than pensions    56,511      55,537
   Employees' postemployment benefits.................       27,195      27,195
                                                            -------     -------
    Total noncurrent liabilities......................       83,706      82,732
                                                            -------     -------

Current liabilities:
   Notes payable and commercial paper.................      460,025     402,795
   Long-term debt due within one year.................      217,532      44,481
   Accounts payable...................................      195,933     226,712
   Dividends payable..................................       44,575      46,461
   Recovered electric energy costs....................        6,850           -
   Customers' deposits................................       23,914      23,902
   Accrued taxes......................................       21,465      57,848
   Accrued interest...................................       39,344      36,729
   Current portion of accumulated deferred income taxes           -       8,142
   Other..............................................       67,283      68,729
                                                            -------      ------
    Total current liabilities.........................    1,076,921     915,799
                                                          ---------     -------

Deferred credits:
   Customers' advances for construction...............       55,998      54,260
   Unamortized investment tax credits ................       92,071      94,459
   Accumulated deferred income taxes..................      546,373     538,581
   Other..............................................       23,336      27,343
                                                            -------     -------
    Total deferred credits............................      717,778     714,643
                                                            -------     -------

Commitments and contingencies (Notes 4 and 5).........   ----------  ----------
                                                         $5,161,971  $5,177,636
                                                         ==========  ==========



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

                                       9
<PAGE>


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


                                                             Three Months Ended
                                                                  June 30,
                                                             1999         1998
                                                             ----         ----

Operating revenues:
   Electric...........................................       $373,690  $369,940
   Gas................................................        140,895   133,170
   Other..............................................          1,580     1,488
                                                              -------   -------
                                                              516,165   504,598

Operating expenses:
   Fuel used in generation............................         54,882    49,554
   Purchased power....................................        111,963   123,874
   Gas purchased for resale...........................         87,721    84,058
   Other operating and maintenance expenses...........        102,037   102,564
   Depreciation and amortization......................         48,822    46,795
   Taxes (other than income taxes) ...................         23,595    20,937
   Income taxes  .....................................         14,768    13,550
                                                              -------   -------
                                                              443,788   441,332
                                                              -------   -------
Operating income......................................         72,377    63,266

Other income and deductions - net.....................            831     1,968

Interest charges:
   Interest on long-term debt.........................         29,908    30,688
   Other interest.....................................          6,741     4,498
   Allowance for borrowed funds used during construction       (2,061)   (2,971)
   Dividends on PSCo obligated mandatorily redeemable
     preferred securities of subsidiary trust holding
     solely subordinated debentures of PSCo (Note 7)            3,800     2,111
                                                                -----     -----
                                                               38,388    34,326
                                                               ------    ------

Net income............................................         34,820    30,908
Dividend requirements and redemption premium on
 preferred stock .....................................              -     2,403
                                                              -------     -----
Earnings available for common stock...................        $34,820   $28,505
                                                              =======   =======



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

                                       10
<PAGE>


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


                                                              Six Months Ended
                                                                  June 30,
                                                             1999         1998
                                                             ----         ----

Operating revenues:
   Electric...........................................    $  755,012 $  745,386
   Gas................................................       395,066    398,653
   Other..............................................         4,957      5,201
                                                             -------    -------
                                                           1,155,035  1,149,240

Operating expenses:
   Fuel used in generation............................       106,747    100,183
   Purchased power....................................       226,190    247,931
   Gas purchased for resale...........................       260,562    260,540
   Other operating and maintenance expenses...........       196,548    196,509
   Depreciation and amortization......................        97,362     89,691
   Taxes (other than income taxes) ...................        47,082     40,906
   Income taxes  .....................................        43,982     50,368
                                                             -------    -------
                                                             978,473    986,128
                                                             -------    -------
Operating income......................................       176,562    163,112

Other income and deductions:
   Equity earnings in Yorkshire Power (Note 2)........             -      3,446
   Miscellaneous income and deductions - net..........          (735)      (917)
                                                                ----       ----
                                                                (735)     2,529

Interest charges:
   Interest on long-term debt.........................         59,791    59,266
   Other interest.....................................         11,961    10,151
   Allowance for borrowed funds used during construction       (4,284)   (5,692)
   Dividends on PSCo obligated mandatorily redeemable
     preferred securities of subsidiary trust holding
     solely subordinated debentures of PSCo (Note 7)            7,600     2,111
                                                                -----     -----
                                                               75,068    65,836
                                                               ------    ------

Net income............................................        100,759    99,805
Dividend requirements and redemption premium on
 preferred stock .....................................              -     5,332
                                                               ------     -----
Earnings available for common stock...................       $100,759   $94,473
                                                             ========   =======



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

                                       11
<PAGE>


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


                                                              Six Months Ended
                                                                  June 30,
                                                             1999         1998
                                                             ----         ----

Operating activities:
   Net income.........................................       $100,759   $99,805
   Adjustments to reconcile net income to net
    cash provided by operating activities:
     Depreciation and amortization....................        100,369    92,182
     Amortization of investment tax credits...........         (2,388)   (2,394)
     Deferred income taxes............................          4,735       (63)
     Equity in earnings of Yorkshire Power............              -    (3,446)
     Change in accounts receivable....................         17,210    46,847
     Change in inventories............................         18,729    20,140
     Change in other current assets...................        102,519    58,282
     Change in accounts payable.......................        (30,778)  (53,082)
     Change in other current liabilities..............        (28,353)  (18,643)
     Change in deferred amounts.......................         (6,977)  (20,083)
     Change in noncurrent liabilities.................            974     2,268
                                                              -------   -------
       Net cash provided by operating activities......        276,799   221,813

Investing activities:
   Construction expenditures..........................       (215,940) (213,677)
   Proceeds from disposition of property, plant
     and equipment ...................................         12,467     4,808
   Purchase of other investments......................         (2,481)   (2,172)
   Sale of other investments..........................          2,361     3,145
                                                              -------     -----
       Net cash used in investing activities..........       (203,593) (207,896)

Financing activities:
   Proceeds from the sale of PSCo obligated mandatorily
    redeemable preferred securities ..................              -   194,000
   Proceeds from the sale of long-term debt...........         47,666   248,130
   Redemption of long-term debt.......................        (66,482)  (80,111)
   Short-term borrowings - net........................         57,230  (102,069)
   Dividends on common stock..........................        (92,976)  (80,959)
   Redemption of preferred stock (Note 7).............              -  (181,824)
   Dividends and redemption premium on preferred
     stock (Note 7) ..................................              -    (8,261)
                                                                  ---    ------
       Net cash used in financing activities..........        (54,562)  (11,094)
                                                              -------   -------
       Net increase in cash and temporary cash
         investments .................................         18,644     2,823
       Cash and temporary cash investments at
         beginning of period .........................         19,926    18,909
                                                               ------    ------
       Cash and temporary cash investments at
         end of period ...............................       $ 38,570  $ 21,732
                                                             ========  ========


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



                                       12
<PAGE>


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

                                     ASSETS

                                                          June 30,  December 31,
                                                            1999         1998
                                                            ----         ----

Property, plant and equipment, at cost:
   Electric...........................................    $2,750,574 $2,665,115
   Construction in progress...........................        91,488    121,407
                                                              ------    -------
                                                           2,842,062  2,786,522
   Less: accumulated depreciation.....................     1,086,562  1,057,183
                                                           ---------  ---------
    Total property, plant and equipment...............     1,755,500  1,729,339
                                                           ---------  ---------


Investments, at cost:
   Notes receivable from affiliate....................       119,036    119,036
   Other..............................................         5,700      5,591
                                                             -------    -------
    Total investments.................................       124,736    124,627
                                                             -------    -------

Current assets:
   Cash and temporary cash investments................         6,895      1,350
   Accounts receivable, less reserve for uncollectible
     accounts ($1,314 at June 30,1999; $1,695 at
     December 31, 1998)...............................        74,313     76,190
   Accrued unbilled revenues..........................        34,107      9,373
   Materials and supplies, at average cost............        17,544     16,970
   Fuel inventory, at average cost....................         2,292      2,293
   Current portion of accumulated deferred income taxes        3,062      6,113
   Prepaid expenses and other.........................         2,540      5,248
                                                             -------    -------
    Total current assets..............................       140,753    117,537
                                                             -------    -------

Deferred charges:
   Regulatory assets (Note 1).........................       108,555    111,971
   Unamortized debt expense...........................         8,970      8,767
   Other..............................................        53,262     37,623
                                                             -------    -------
    Total deferred charges............................       170,787    158,361
                                                             -------    -------
                                                          $2,191,776 $2,129,864
                                                          ========== ==========



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

                                       13
<PAGE>


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

                             CAPITAL AND LIABILITIES

                                                          June 30,  December 31,
                                                            1999         1998
                                                            ----         ----

Common stock..........................................      $348,402  $ 348,402
Retained earnings.....................................       393,676    389,818
                                                             -------    -------
    Total common equity...............................       742,078    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........................................       630,531    530,618
                                                             -------    -------
                                                           1,472,609  1,368,838
                                                           ---------  ---------

Noncurrent liabilities:
   Employees' postretirement benefits other than pensions      6,926      5,941
   Employees' postemployment benefits.................         3,587      3,571
                                                             -------    -------
    Total noncurrent liabilities......................        10,513      9,512
                                                             -------    -------

Current liabilities:
   Notes payable and commercial paper.................        49,697     85,162
   Note payable to affiliate..........................         9,000      9,000
   Long-term debt due within one year.................        90,113     90,113
   Accounts payable...................................        77,243     64,275
   Dividends payable..................................        22,343     20,007
   Recovered electric energy costs....................         7,057     18,760
   Customers' deposits................................         6,213      5,904
   Accrued taxes......................................        18,081     37,646
   Accrued interest...................................        14,995     12,273
   Other..............................................        21,682     18,011
                                                             -------    -------
    Total current liabilities.........................       316,424    361,151
                                                             -------    -------

Deferred credits:
   Unamortized investment tax credits.................         5,094      5,219
   Accumulated deferred income taxes..................       382,831    380,655
   Other..............................................         4,305      4,489
                                                             -------    -------
    Total deferred credits............................       392,230    390,363
                                                             -------    -------

Commitments and contingencies (Notes 4 and 5).........    ---------- ----------
                                                          $2,191,776 $2,129,864
                                                          ==========  =========



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


                                       14
<PAGE>


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


                                                             Three Months Ended
                                                                  June 30,
                                                               1999      1998
                                                               ----      ----

Operating revenues....................................       $224,114  $264,006

Operating expenses:
   Fuel used in generation............................         97,975   121,725
   Purchased power....................................         11,404     7,079
   Other operating & maintenance expenses.............         33,858    35,065
   Depreciation and amortization......................         18,435    17,761
   Taxes (other than income taxes)....................         12,487    11,328
   Income taxes.......................................         13,483    21,729
                                                              -------   -------
                                                              187,642   214,687
                                                              -------   -------
Operating income......................................         36,472    49,319

Other income and deductions - net.....................          2,380     2,263

Interest charges:
   Interest on long-term debt.........................         13,639    11,597
   Other interest.....................................            960     2,533
   Allowance for borrowed funds used during construction         (544)   (1,427)
   Dividends on SPS obligated mandatorily redeemable
    preferred securities of subsidiary trust holding
    solely subordinated debentures of SPS ............          1,962     1,962
                                                                -----     -----
                                                               16,017    14,665
                                                               ------    ------

Net income............................................        $22,835   $36,917
                                                              =======   =======


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

                                       15
<PAGE>


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


                                                              Six Months Ended
                                                                  June 30,
                                                               1999      1998
                                                               ----      ----

Operating revenues....................................       $426,666  $463,738

Operating expenses:
   Fuel used in generation............................        180,028   212,015
   Purchased power....................................         16,509     9,720
   Other operating & maintenance expenses.............         67,662    69,461
   Depreciation and amortization......................         36,907    35,537
   Taxes (other than income taxes) ...................         25,871    23,393
   Income taxes ......................................         27,848    32,954
                                                              -------   -------
                                                              354,825   383,080
                                                              -------   -------
Operating income......................................         71,841    80,658

Other income and deductions - net.....................          4,460     3,338

Interest charges:
   Interest on long-term debt.........................         24,834    23,101
   Other interest.....................................          2,549     5,112
   Allowance for borrowed funds used during construction       (1,233)   (3,198)
   Dividends on SPS obligated mandatorily redeemable
    preferred securities of subsidiary trust holding
    solely subordinated debentures of SPS ...........           3,925     3,925
                                                                -----     -----
                                                               30,075    28,940

Net income............................................        $46,226   $55,056
                                                              =======   =======


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


                                       16
<PAGE>


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


                                                              Six Months Ended
                                                                  June 30,
                                                               1999      1998
                                                               ----      ----

Operating activities:
   Net income.........................................        $46,226  $55,056
   Adjustments to reconcile net income to net
    cash provided by operating activities:
     Depreciation and amortization....................         38,713   37,703
     Amortization of investment tax credits...........           (125)    (125)
     Deferred income taxes............................          6,102    1,384
     Allowance for funds used during construction.....           (829)       -
     Change in accounts receivable....................          1,877   (8,030)
     Change in inventories............................           (573)    (695)
     Change in other current assets...................        (22,026)    (734)
     Change in accounts payable.......................         12,968  (34,457)
     Change in other current liabilities..............        (24,566) (11,189)
     Change in deferred amounts.......................        (14,291)  70,005
     Change in noncurrent liabilities.................          1,001     (855)
                                                              -------  -------
       Net cash provided by operating activities......         44,477  108,063

Investing activities:
   Construction expenditures..........................        (61,840) (43,184)
   Allowance for equity funds used during construction            829        -
   Cost of disposition of property, plant and equipment        (2,162)  (1,830)
   Purchase of other investments......................           (109)    (126)
                                                              -------  -------
       Net cash used in investing activities..........        (63,282) (45,140)

Financing activities:
   Proceeds from sale of long-term debt...............         99,846        -
   Redemption of long-term debt.......................              -      (57)
   Short-term borrowings - net........................        (35,465)  (9,872)
   Dividends on common stock..........................        (40,031) (47,548)
                                                              -------  -------
       Net cash used in financing activities..........         24,350  (57,477)
                                                              -------  -------
       Net increase in cash and temporary cash
         investments .................................          5,545    5,446
       Cash and temporary cash investments at
         beginning of period .........................          1,350      986
                                                              -------    -----
       Cash and temporary cash investments at
         end of period ...............................       $  6,895  $ 6,432
                                                             ========  =======



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


                                       17
<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. Over
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. Accounting under
SFAS 71 is  appropriate  as long as:  rates are  established  by or  subject  to
approval by independent,  third party regulators;  rates are designed to recover
an enterprise's  cost-of-service;  and in view of the demand for service,  it is
reasonable  to assume that rates are set at levels that will  recover  costs and
can be collected from customers.

      While  deregulation  legislation  has been enacted in certain states where
SPS operates (see Note 4. Regulatory  Matters),  the Company currently  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  separately have a material  adverse effect on NCE's,  PSCo's and/or
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):

June 30, 1999                               NCE           PSCo            SPS
                                          ------         ------         ------

Income taxes........................      $142,520      $ 64,784       $ 78,241
Nuclear decommissioning costs.......        65,125        65,125              -
Employees' postretirement benefits
  other than pensions...............        55,336        52,516          2,820
Employees' postemployment benefits..        24,647        24,224              -
Demand-side management costs........        34,171        29,379          4,792
Unamortized debt reacquisition costs        31,819        15,230         16,040
Other...............................         8,603         1,941          6,662
                                            ------        ------         ------
  Total.............................      $362,221      $253,199       $108,555
                                          ========      ========       ========



                                       18
<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..        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 June  30,  1999  and  December  31,  1998 are
reflected in rates charged to customers.  The recovery of regulatory assets over
the  next  three  years  is  estimated  to  exceed  $130  million.  Refer to the
discussion  below or the Notes to  Consolidated  Financial  Statements  included
herein and in the NCE,  PSCo and SPS 1998 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). PSCo
is recovering the FERC jurisdictional portion of postemployment benefits costs.

      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,  energy  marketing and trading,  non-regulated  energy
services, 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 applicable 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.


                                       19
<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.

Energy Trading Activities

      The Company and its subsidiaries  adopted Emerging Issues Task Force Issue
No. 98-10, "Accounting for Energy Trading and Risk Management Activities" ("EITF
98-10"),  effective  January  1,  1999.  EITF  98-10  requires  gains or  losses
resulting from market value changes on energy  trading  contracts to be recorded
in  earnings.  The  initial  adoption  of EITF 98-10 on January 1, 1999,  had no
impact  on the net  income  of NCE,  PSCo or SPS.  For the  three  and six month
periods ended June 30, 1999, NCE recognized net  gains/(losses)  of $688,000 and
$(551,000), respectively, and PSCo recognized net gains of $261,000 and $78,000,
respectively, for market value changes on energy trading contracts. SPS does not
currently have any trading activities.

      Revenues and purchased energy costs associated with trading activities are
presented  net on the income  statement  in electric and gas  revenues.  Certain
prior year amounts have been reclassified for comparative purposes.

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.  Comprehensive
income  and  its  components  were  reported  in  NCE's  Consolidated  Condensed
Statements  of  Shareholders'  Equity for the three and six month  periods ended
June 30, 1999.  Other  comprehensive  income consists solely of foreign currency
translation adjustments related to the investment in Yorkshire Power.

      For the three and six month periods ended June 30, 1999,  PSCo and SPS had
no  comprehensive  income  items,  therefore,  comprehensive  income  equals net
income.  For the same period in 1998,  SPS had no  comprehensive  income  items,
therefore,  comprehensive  income equals net income.  For the three months ended
June 30, 1998, PSCo had no comprehensive income items, therefore,  comprehensive
income equals net income.

      During the three month period ended March 31, 1998, PSCo had comprehensive
income  of  $5.3  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 $9.4 million at March 31,  1998.  As a result of
this sale, PSCo had no Accumulated Other Comprehensive Income at March 31, 1998,
and for all subsequent periods.

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.

                                       20
<PAGE>


             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

      The potentially dilutive securities included in the computation of diluted
earnings  per share were  23,000 and 35,000 for the three and six month  periods
ended June 30, 1999, respectively, and 156,000 and 158,000 for the three and six
month periods ended June 30, 1998,  respectively.  These shares had no impact on
the Company's reported earnings per share information.

      Approximately  2,124,000  common  shares are  issuable  under stock option
grants as of June 30, 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.

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 the holding  company for the  combined  assets and  operations.  NSP will be
renamed Xcel Energy Inc. ("Xcel Energy").  Concurrently  with the closing of the
NCE/NSP Merger, NSP will contribute all of its utility 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 Xcel Energy  common  stock,  par value $2.50 per share  ("Xcel  Energy
Common  Stock").  Cash  will be paid in lieu of any  fractional  shares  of Xcel
Energy Common Stock which holders of NCE Common Stock would  otherwise  receive.
Based on  outstanding  common stock of NCE and NSP at June 30, 1999, the NCE/NSP
Merger would result in the common  shareholders  of NCE owning 54% of the common
equity of Xcel  Energy  and the  common  shareholders  of NSP  owning 46% of the
common  equity of Xcel Energy.  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 Xcel Energy 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 Xcel Energy.

                                       21
<PAGE>


             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

      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 are being deferred by NCE and are expected to be amortized to
expense in periods  subsequent to the consummation of the merger consistent with
the anticipated recovery in rates.

      The shareholders of the Company and NSP approved the Agreement and Plan of
Merger on June 28, 1999.  Additionally,  consummation  of the NCE/NSP  Merger is
subject to certain  closing  conditions,  including,  among others,  approval or
completion of 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.  Applications or submissions to the state
utility regulators, where required, and the FERC were completed in July 1999. In
general,  such filings  propose the sharing of cost savings among  customers and
shareholders  for up to five  years.  NCE and NSP have each  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 another 9 to 15 months to complete.

      A merger integration team, consisting of executives from each company, was
formed  and  will  oversee  merger-related  activities  and the  integration  of
operations  of NCE and NSP.  It is  Management's  intention  that  the  combined
company begin  realizing  certain  savings upon the  consummation of the NCE/NSP
Merger.

      The following unaudited  summarized pro forma financial  information gives
effect to the NCE/NSP  Merger as if it had occurred at June 30, 1999 for balance
sheet information and at January 1, 1999 for income statement information.  This
financial  information  should  be  read  in  conjunction  with  the  historical
financial statements and related notes of NCE and NSP, which are included in the
Annual Reports on Form 10-K and Quarterly Reports on Form 10-Q of the respective
companies.

     The unaudited summarized pro forma financial  information has been prepared
using  information  provided  by NSP.  This  information  does  not  necessarily
indicate what the combined  company's  financial  position or operating  results
would have been if the merger had been completed on the assumed completion dates
and does not  necessarily  indicate  future  operating  results of the  combined
company.

Unaudited Summarized Pro Forma Balance Sheet information as of June 30, 1999 (in
millions):

                             NSP         NCE     Adjustments  Pro Forma
                             ---         ---     -----------  ---------

Utility plant - net.....   $4,378      $6,035      $1,213      $11,626
Current assets..........      886         714           -        1,600
Other assets............    3,275       1,006      (1,213)       3,068
                           ------      ------      ------       ------
  Total assets..........   $8,539      $7,755      $    -      $16,294
                           ======      ======      ======      =======

Common equity...........   $2,487      $2,644      $    -      $ 5,131
Preferred securities....      305         294           -          599
Long-term debt..........    2,153       2,127           -        4,280
                           ------      ------      ------      ------
  Total capitalization..    4,945       5,065           -       10,010
Current liabilities.....    2,060       1,440           -        3,500
Other liabilities.......    1,534       1,250           -        2,784
                           ------      ------      ------       ------
  Total equity and
    liabilities            $8,539      $7,755      $    -      $16,294
                           ======      ======      ======      =======


                                       22
<PAGE>


             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)


Unaudited  Summarized Pro Forma Income Statement  information for the six months
ended June 30 (in millions):

   1999                      NSP         NCE     Adjustments  Pro Forma
                             ---         ---     -----------  ---------

Revenues................   $1,402      $1,716      $  167      $3,285
Operating income........      154         307          56         517
Net income..............       63         151           -         214
Earnings available
  for common ...........       60         151           -         211
Earnings per share......    $0.40       $1.31           -       $0.64

   1998
Revenues................   $1,340      $1,747      $  110      $3,197
Operating income........      144         329          58         531
Net income..............       92         143           -         235
Earnings available
  for common ...........       89         143           -         232
Earnings per share......    $0.59       $1.28           -       $0.72

3. Investment in Yorkshire Power (NCE and PSCo)

      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, a 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.

     On August 12,  1999,  the Office of Gas and  Electricity  Markets (the U.K.
regulator of gas and electricity  rates) published draft price proposals for the
U.K.'s regional electric distribution businesses that would be effective for the
five-year  period  beginning  April 1, 2000. The draft price  proposals  reflect
average  reductions  of 16% to 21%.  The new  distribution  rates  proposed  for
Yorkshire call for a 15% to 20% reduction in distribution revenues. Yorkshire is
in the process of evaluating the impacts of the proposed price reductions.

      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 June 30,  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
principal balance of the promissory note to PSCo.

      Summarized  income  statement  information  for the six months  ended June
30,1999 and 1998, respectively is presented below (in millions):
                                                      1999         1998
                                                      ----         ----
    Yorkshire Power:
      Operating revenues.......................    $1,156.7      $1,167.1
                                                   --------      --------
      Operating income.........................       152.0         182.2
                                                   --------      --------
      Net income (loss)........................    $   30.2      $   (7.9)
                                                   ========      ========
    NCI's equity in earnings (losses) of
      Yorkshire Power .........................    $   15.1      $   (4.0)
                                                   ========      ========

                                       23
<PAGE>



             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

     NCI's equity in earnings of  Yorkshire  Power  increased  by  approximately
$19.1 million for the six months ended June  30,1999,  when compared to the same
period in 1998,  primarily  due to the impact of one-time  items  recognized  in
1998. In the second quarter of 1998, Yorkshire Power recognized an impairment of
its investment in Ionica, a wireless  telecommunications  company,  upon the May
22,  1998,  announcement  by Ionica  that  negotiations  for release of lines of
credit  from  existing  providers  of bank  finance  had been  unsuccessful.  In
November 1998,  Ionica was placed into  receivership  and an  administrator  was
appointed to oversee its operations and  distribute  its remaining  assets.  The
impairment,  reflecting a write down to fair market value, was offset,  in part,
by an unrelated tax adjustment. These two items reduced NCI's equity earnings in
Yorkshire  Power by  approximately  $16 million.  The  investment  in Ionica was
subsequently  sold  with  no  further  adverse  financial  impact  expected.  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.  This charge reduced
NCI's equity earnings in Yorkshire Power by approximately $4 million.

    The unaudited pro forma financial information, for the six months ended June
30, 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
six months ended June 30, 1998 (in millions):

                                                            PSCo Earnings
                                                                1998
                                                                ----
Net income...............................................     $ 99.8

Pro forma adjustments:

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

Pro forma result.........................................     $100.3
                                                              ======

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.   Subsequent  to  the  approval  of  the
      performance  based regulatory plan 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 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 $15.9  million for the 1997 earnings test and an estimated  refund
obligation of $8 million for the 1998 earnings


                                       24
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

test. The final  determination,  by the CPUC, for 1998 is pending. In July 1998,
PSCo began  refunding  the 1997  earnings  test refund  obligation  to customers
through  bill  credits.  PSCo has  recorded an estimated  refund  obligation  of
approximately  $5.8  million  as of June 30,  1999 for  anticipated  sharing  of
earnings for 1999.

      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 from the date of the Merger, August
1, 1997, for one-half of the measured non-fuel operation and maintenance expense
savings associated with the PSCo/SPS 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. SPS
has entered into a settlement  agreement  with the General  Counsel of the PUCT,
which,  if approved,  would provide for the recovery of  substantially  all 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


                                       25
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

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  previously  discussed  proposed  settlement
agreement with the General Counsel's office at the PUCT, the General Counsel has
agreed with SPS's proposed recovery of the Thunder Basin costs.

      Effective in April 1999, the PUCT  authorized SPS to reduce its fixed fuel
factor for SPS's Texas retail  jurisdiction,  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
million fuel refund,  including  interest,  was 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. In January 1999, SPS implemented new annual
fixed fuel cost  recovery  factors to reflect  lower fuel costs  primarily  as a
result of the previously  discussed 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

                                       26
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

 16.8 years.  On November 30, 1998, the
NMPRC approved the stipulation and the new rates 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 June 1998,  SPS recorded  $7.7 million of  additional  revenues in connection
with the  settlement.  For the year ended  December 31, 1998, SPS recorded $16.9
million of  additional  revenues  and $7.6  million of  additional  depreciation
expense.

Cheyenne Rate Case

      On August 13, 1999,  Cheyenne  filed a combined gas and electric rate case
with the Public Service Commission of Wyoming ("WPSC") requesting a $2.3 million
increase electric and a $1.3 million increase in gas base rates, including a 12%
return on equity.  This follows the  expiration  of the two year  moratorium  on
filing rate cases in connection with the WPSC approval of the PSCo/SPS Merger.

Deregulation Legislation (NCE and SPS)

New Mexico

      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. Customers of a municipal utility and
customers of a distribution  cooperative utility will be afforded choice only if
the  respective  utility elects to  participate.  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-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.  Before  January 1, 2001,  SPS
must separate its operations into two segments; energy generation,  transmission
and  distribution,  and a retail  business  either by the  creation  of separate
affiliates  that  may be owned by a  common  holding  company  or by the sale of
assets to one or more third parties. A regulated company will be prohibited from
providing unregulated service.

Texas

      On June 18,  1999,  an electric  utility  restructuring  act was passed in
Texas,  which  allows  for  retail  competition,  for most  areas of the  state,
beginning January 1, 2002. The legislation requires,  among other things, a rate
freeze for all customers,  effective  September 1, 1999 until January 1, 2002; a
rate reduction for those  residential and small commercial  customers who choose
not to switch  suppliers at the start of retail  competition;  the unbundling of
business  activities,  costs and rates relating to generation,  transmission and
distribution  and retail  services;  reductions in NOx and SO2 emissions and the
recovery of stranded costs.  The PUCT can delay the date for retail  competition
if a power  region is unable to offer  fair  competition  and  reliable  service
during pilot  projects  which begin for all  utilities on June 1, 2001 for 5% of
the utility's combined load of all customer classes.

      The legislation specifically addresses competition in the Texas Panhandle,
where SPS operates,  recognizing  that certain  transmission  constraints  exist
within the region that require full retail  customer choice to develop on a more
structured  schedule  than the rest of the state.  SPS must file a transition to
competition  plan with the PUCT by  December  1, 2000.  SPS,  with no  estimated
stranded  costs,  must direct any excess  earnings  during the period January 1,
1999

                                       27
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

through  December 31, 2001 to  improvements  in  transmission  and  distribution
facilities,  to capital expenditures to improve air quality or to accelerate the
amortization of regulatory assets (subject to PUCT approval).

      Additionally,  the Texas legislation  requires that no generation  company
can own and  control  more  than 20% of the  installed  capacity  located  in or
capable of delivering electricity to a power region.  Utilities owning more than
400 Mw must sell,  at  auction,  entitlements  to at least 15% of the  utility's
installed  generation  capacity.  The power sales auctions are to continue for 5
years or until 40% of the utilities  residential and small commercial  customers
served  prior to the start  date of  competition  are  served by  non-affiliated
companies.  The legislation  includes several possible  remedies to market power
abuses.  These  provisions  are  not  immediately  applicable  to SPS due to the
existing  transmission  constraints  and market  power  issues in the  Panhandle
region.

Financial Reporting Considerations

      The Emerging Issues Task Force of the Financial Accounting Standards Board
reached  a  consensus  in  Issue  No.  97-4,  "Deregulation  of the  Pricing  of
Electricity" ("97-4") indicating that when deregulatory legislation is passed or
when a rate order (whichever is necessary to effect change in the  jurisdiction)
that contains  sufficient  detail for an enterprise to reasonably  determine how
the  transition  plan will affect the  separable  portion of its business  whose
pricing is being deregulated is issued, the enterprise should stop applying SFAS
71 to that  separable  portion of its business.  The Company is  evaluating  the
provisions of 97-4 related to the recently enacted  legislation and, at the time
that such provisions have been met, SPS will no longer apply SFAS 71.

Gas Utility Matters

PSCo Rate Cases

      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).  On June 8, 1999, the CPUC
approved an increase in base rates of  approximately  $15 million with an 11.25%
return on equity,  effective  July 1, 1999.  PSCo was also  allowed  recovery of
certain  environmental  costs.  Prudently  incurred  year  2000  costs  will  be
recovered under a separate mechanism beginning in 2000.

      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  (associated  with the  PSCo/SPS  merger)
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.

PSCo Unbundling and Deregulation of the Retail Natural Gas Supply Business

      On April 26, 1999, the Colorado  legislature approved a bill, which allows
natural gas public  utilities  to  voluntarily  submit plans to the CPUC to open
their markets and enable  customers to choose their  natural gas supplier.  This
bill was signed by the  governor  on June 6, 1999.  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 will continue to be regulated,  with delivery
companies  required to offer  nondiscriminatory  pipeline access to competitors.
PSCo will continue to be subject to the reporting  requirements  of SFAS 71 as a
regulated distribution company.


                                       28
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

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 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  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
$9.8 million  including the judgement and interest.  In July 1997,  the Colorado
Court of Appeals sent back to trial court the previously awarded 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.  Settlement has been
achieved  with  two  small  PRPs,  although  the  Company  has  been  ultimately
unsuccessful  recovering from the remaining  PRP's. In March 1998, PSCo sold the
remaining Barter properties, and the total proceeds were $1.1 million.

      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 to meet the Phase II emission  standards
placed on SO2 through the  combination  of: (1) the use of low sulfur coal,  (2)
the operation of air quality control equipment on certain generation facilities,
and (3)  allowances  issued by the EPA and purchased  from other  companies.  In
addition,  PSCo will be required to modify  certain  boilers by the year 2000 to
reduce the NOx  emissions  in order to comply  with Phase II  requirements.  The
estimated  Phase II costs  for  these  future

                                       29
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

plant  modifications to meet NOx requirements  total  approximately $1.5 million
and pertains to PSCo's Cherokee Unit 1 and 2 and Arapahoe Unit 3.

      PSCo has obtained all  necessary  conditions  to proceed with its plans 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. The cost of these controls will be recovered
through rates.

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 certain portions of this emission control equipment
has been completed with the remaining requirements 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. In May
1999,  Unit 2 began  operating  with the required  particulate  and NOx emission
control  equipment.  The  operation of SO2 emission  control  equipment has been
delayed  due to  equipment  problems.  The joint  owners  have filed a notice of
"force majeure" to excuse any equipment  related  delays.  The joint owners will
withdraw this notice if they resolve the equipment  problems within the terms of
the settlement agreement.

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  held a pretrial  conference  in June 1999 and  ordered  all
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.

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,

                                       30
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

PSCo and the DOE entered into an agreement  resolving all the defueling  issues,
as discussed in Notes to Consolidated  Financial  Statements in NCE's and PSCo's
1998 annual report on Form 10-K.

      On June 4, 1999, the Nuclear  Regulatory  Commission  ("NRC") approved the
transfer of the ISFSI to the DOE.  The license was revised to reflect the DOE as
the  licensee for the ISFSI and to reflect the  conditions  necessary to support
the NRC's approval of the license transfer.

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 appeal is pending.  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 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 June 30,
1999, all of the remediation and testing phases for all critical IT systems have
been  completed.  For non-IT  systems,  which exist primarily in the generation,
transmission and distribution areas of the business, the inventory,  assessment,
remediation and testing phases have also been  completed.  NCE has achieved "Y2K
Ready" status for all  mission-critical  electrical  generating and transmission
facilities.  Readiness was accomplished by June 30, 1999, in

                                       31
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

accordance  with the  guidelines  established  by the  North  American  Electric
Reliability Council ("NERC").  NCE is a participant in the NERC Y2K Program that
has established  reporting criteria and milestone dates for electric  utilities.
The final step of this program was the submittal of a letter to the president of
NERC,  certifying  that the company has met the NERC Y2K goal. NCE submitted its
Y2K certification letter, without exceptions, with its June 1999 NERC report.

      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 costs of approximately $19 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.  This  revised  estimate  reflects  a $6
million reduction from previously estimated costs due primarily to finding fewer
Y2K related problems than originally  estimated and lower  contingency  planning
costs. 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  through the six months ended June 30, 1999;  and the
estimated  costs to be incurred  during the  remainder of 1999 and early 2000. A
significant portion of the remaining costs to be incurred consists of finalizing
remaining work on non mission-critical  systems, testing, project management and
contingency planning.
                          Actual                    Remaining      Estimated
                          Costs         Actual      Estimated        Total
                          1998          Costs       Costs to        Project
                          and Prior     1999       be Incurred       Costs
                          ---------     ------     -----------      -------
                                             (in millions)

Operating expenses..          $8.0        $2.4         $5.5          $15.9
Capital for automated
     system components         0.7         0.6          1.4            2.7
IT replacement projects:
     Operating......           0.2         0.6          0.1            0.9
     Capital........           6.4         7.3          0.7           14.4
                              ----        ----         ----          -----
       Total........         $15.3       $10.9         $7.7          $33.9
                             =====       =====         ====          =====

      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.  If this were to occur, the
Company's  operating  utilities  may be  required  to  "island"  (separate  from
neighboring  interconnected utilities) their generation and distribution systems
in their service  territories.  As part of this  scenario,  difficulty  could be
encountered with the restart of generating  units. The overall blackout recovery
plan for NCE is designed so that this most reasonably likely worst case scenario
would be addressed and electricity  restored.  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.

                                       32
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

      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.

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 and Divestitures (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.

Sale of Texas-Ohio Gas, Inc.

      Effective  July 1, 1999,  the Company sold all of the  outstanding  common
stock of Texas-Ohio Gas, Inc., a gas marketing company, including all retail gas
marketing  contracts  serving  customers  in the  northeast  region  of the U.S.
Certain   operations   were  retained  and   transferred  to  e  prime  and  its
subsidiaries.  This sale is not  expected  to have a  significant  impact on the
Company's financial position, results of operations or cash flows.

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

                                       33
<PAGE>


             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

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.

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):
<TABLE>
<CAPTION>
                                                                                Eliminations/
Three months ended:       Electric       Gas                          All       Unallocated     Consolidated
  June 30, 1999           Utility      Utility    International      Other       Amounts *          Total
  -------------           -------      -------    -------------      -----       ---------          -----
<S>                        <C>         <C>         <C>                <C>        <C>              <C>
Revenues:
 External customers       $607,438     $144,131    $     -            $49,265    $      -         $  800,834
 Intersegment                  107        1,699          -             33,352     (35,158)                 -
 Segment profit             53,823         (362)       (65)            (1,221)     (2,940)            49,235

June 30, 1998
Revenues:
 External customers       $642,483     $136,466    $     -            $52,010    $      -         $  830,959
 Intersegment                  455        1,150          -             13,334     (14,939)                 -
 Segment profit             69,042       (1,547)    (5,959)             7,435     (12,378)            56,593

Six months ended:
June 30, 1999
Revenues:
 External customers     $1,201,584     $403,514    $     -            $110,431   $      -         $1,715,529
 Intersegment                  262        3,658          -              49,994    (53,914)                 -
 Segment profit            118,128       17,103     18,075               3,378     (6,149)           150,535

June 30, 1998
Revenues:
 External customers     $1,227,107     $407,709    $     -            $112,160   $      -          $1,746,976
 Intersegment                  614        2,350          -              30,503    (33,467)                  -
 Segment profit            130,273       23,617     (3,160)             14,069    (22,057)            142,742

</TABLE>
* Certain financing costs have been allocated to the operating segments in 1999.

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.

                                       34
<PAGE>

             NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS - (Continued)

     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).

     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):
<TABLE>
<CAPTION>
                                                                                Eliminations/
Three months ended:       Electric       Gas                          All       Unallocated     Consolidated
  June 30, 1999           Utility      Utility    International      Other       Amounts *          Total
  -------------           -------      -------    -------------      -----       ---------          -----
<S>                        <C>         <C>         <C>                <C>        <C>              <C>
Revenues from
 external customers        $373,690    $140,895    $     -            $ 1,580    $      -          $ 516,165
 Segment profit              31,439        (441)         -              3,822           -             34,820

June 30, 1998
Revenues from
 external customers        $369,940    $133,170    $     -            $ 1,488           -          $ 504,598
 Segment profit              33,194      (1,649)         -              5,145      (8,185)            28,505

Six months ended:
June 30, 1999
Revenues from
 external customers        $755,012    $395,066    $     -            $ 4,957           -         $1,155,035
 Segment profit              73,391      16,781          -             10,587           -            100,759

June 30, 1998
Revenues from
 external customers        $745,386    $398,653    $     -            $ 5,201           -          $1,149,240
 Segment profit              77,904      23,229      2,799              7,312     (16,771)             94,473

</TABLE>
* Certain financing costs have been allocated to the operating segments in 1999.

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
$224.1  million and $264.0  million for the three months ended June 30, 1999 and
1998, respectively. Revenues from external customers for this reportable segment
were $426.7  million and $463.7  million for the six months  ended June 30, 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 June  30,1999  and  December  31,  1998 and the results of
operations  for the three and six months  ended June 30,  1999 and 1998 and cash
flows  for  the  six  months  ended  June  30,  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 and six months ended June 30, 1999 should not be taken as an indication of
earnings for all or any part of the balance of the year.



                                       35
<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 June
30,1999,  and the  related  consolidated  condensed  statements  of  income  and
shareholders' equity for the three and six-month periods ended June 30, 1999 and
1998 and the consolidated  condensed  statements of cash flows for the six-month
periods  ended  June 30,  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 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,
August 13, 1999


                                       36
<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 June
30, 1999, and the related  consolidated  condensed  statements of income for the
three and six-month  periods  ended June 30, 1999 and 1998 and the  consolidated
condensed statements of cash flows for the six-month periods ended June 30, 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,  shareholder's  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,
August 13, 1999



                                       37
<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 June 30, 1999, and the related
condensed  statements of income for the three and  six-month  periods ended June
30, 1999 and 1998 and the  condensed  statements of cash flows for the six-month
periods  ended  June 30,  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,  shareholder's  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
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,
August 13, 1999




                                       38
<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 June 30, 1999  Compared to the Three  Months Ended June 30,
1998

NCE/NSP 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 approvals, which are expected to take
from 12 to 18 months to complete  from the date of the merger  announcement.  At
the special  shareholder  meetings on June 28, 1999, the shareholders of NCE and
NSP approved the  Agreement and Plan of Merger.  The name of the merged  company
will be Xcel Energy Inc. The combined  company is  anticipated  to be one of the
top 10 largest gas and electric  energy  companies in the U.S.  Xcel Energy Inc.
and will 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 $0.43 for the second  quarter
of 1999 as  compared  to $0.50 per share  (basic  and  diluted)  for the  second
quarter of 1998.  The decrease in earnings  was  primarily  attributed  to lower
electric sales resulting from mild, wet weather throughout the Company's service
territory and lower operating earnings from Yorkshire Electricity.  In addition,
the 1998 results  included a $7.7 million  benefit from the settlement of a 1985
FERC rate case.  Electric customer growth was approximately  2.0% over the prior
year, with growth in natural gas customers of  approximately  3.3%. Lower demand
for  electricity  as  a  result  of  the  mild,  wet  weather  reduced  earnings
approximately  $0.05 per share during the second  quarter,  compared to the same
period in the prior year.

Electric Operations

      The following table details the change in electric  operating revenues and
energy  costs for the second  quarter of 1999 as  compared to the same period in
1998 (thousands of dollars).
                                                      Increase (Decrease)
                                                      -------------------
Electric operating revenues:
 Retail...............................................     $(20,604)
 Wholesale............................................      (21,693)
Other (including unbilled revenues)...................        6,762
                                                           --------
  Total revenues......................................      (35,535)
Fuel used in generation...............................      (18,423)
Purchased power.......................................       (6,605)
                                                           --------
  Net decrease in electric margin.....................     $(10,507)
                                                           ========

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


                                       39
<PAGE>


                                               Millions of Kwh Sales
                                               ---------------------
                                                1999      1998    % Change *
                                                ----      ----    ----------
Residential................................     2,244     2,215      1.3%
Commercial and Industrial..................     6,676     6,686       -
Public Authority...........................       203       197      2.9
                                                -----     -----
  Total Retail.............................     9,123     9,098      0.3
Wholesale..................................     3,030     3,698    (18.0)
                                                -----     -----
Total......................................     12,153    12,796    (5.0)
                                                ======    ======

Power marketing and trading................     2,953       781     **
                                                =====     =====

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

      Electric margin  decreased in the second quarter of 1999, when compared to
the second  quarter of 1998,  due  primarily  to a 5.0%  decrease in total sales
resulting  from mild,  wet weather  during  1999,  and a lower level of oil well
pumping  in the SPS  service  territory,  the  benefit  of a SPS FERC  rate case
settlement during 1998 of approximately $7.7 million,  and higher provisions for
estimated  customer refunds in connection with PSCo's earnings sharing in excess
of 11% return on equity.  These  decreases  were offset,  in part,  by continued
customer growth, primarily in the Colorado service territory.

      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.  SPS's
revenues  were  reduced   approximately  $24.7  during  the  second  quarter  in
conjunction  with the  recovery  of lower  fuel  costs  (see Note 4.  Regulatory
Matters in Item 1.  FINANCIAL  STATEMENTS).  PSCo has an 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  $2.2
million during the second quarter 1999, compared to the prior year.

      Fuel used in generation  expense decreased $18.4 million during the second
quarter of 1999,  as  compared to the same  quarter in 1998,  due  primarily  to
reduced  generation  and lower coal costs at SPS. This decrease in coal costs is
primarily  due to  negotiations  with  a new  supplier  in  mid-1998  and  lower
transportation costs.

     Purchased power expense decreased $6.6 million during the second quarter of
1999,  as compared to the same quarter in 1998,  primarily due to a lower volume
of purchases.

Gas Operations

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

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

Revenues from gas sales (including unbilled revenues).     $ 6,038
Gas purchased for resale..............................       1,813
                                                           -------
 Net increase in gas sales margin.....................       4,225
Transportation revenues...............................         713
                                                           -------
 Increase in net gas margin...........................     $ 4,938
                                                           =======


                                       40
<PAGE>


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

                                      Millions of Dth Deliveries
                                      --------------------------
                                                1999  1998    % Change *
                                                ----  ----    ----------
Residential................................     19.1  18.6       2.9%
Commercial.................................      9.3   9.4      (0.7)
                                               ----- -----
  Total sales..............................     28.4  28.0       1.7
Transportation.............................     28.1  27.3       2.6
                                               ----- -----
  Total....................................     56.5  55.3       2.1
                                                ==== =====

Non-regulated gas marketing and trading....     40.5  15.5      **
                                               ===== =====

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

     Gas sales margin increased during the second quarter of 1999, when compared
to the second  quarter of 1998,  primarily  due to higher  retail  sales at PSCo
resulting from growth in the number of customers served.  Although non-regulated
gas  marketing  sales and trading  increased  significantly,  the margin on such
sales was comparable to the prior year.

      Gas transportation  revenues  increased  approximately $0.7 million during
the  second  quarter  of 1999,  when  compared  to the  second  quarter of 1998,
primarily due to higher deliveries at PSCo.

      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 second quarter of 1999, as compared to the second 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 and Equity in Earnings of Unconsolidated Subsidiaries

      Other operating revenues decreased approximately $1.3 million due to lower
development fee revenues from  non-regulated  independent power projects offset,
in part,  by an  increase  in revenue  from  energy  management  and  consulting
services.

      Equity  earnings from Yorkshire Power increased over 1998 primarily due to
the   recognition  in  1998  of  an  impairment  of  an  investment  in  a  U.K.
telecommunications company. This impairment, in conjunction with the recognition
of a  non-recurring  positive tax  adjustment at Yorkshire  Power,  reduced 1998
earnings  approximately  $16.6 million or 15 cents per share.  Yorkshire Power's
operating  earnings  were lower in 1999  primarily due to lower gas and electric
sales  resulting from mild weather,  higher  marketing  costs to obtain new, and
retain existing customers, and increased maintenance expenses (see Note 3.
Investment in Yorkshire Power in Item 1. FINANCIAL STATEMENTS).

      Miscellaneous  income and deductions-net  decreased primarily due to delay
damage penalties  incurred in development of certain  independent power projects
by non-regulated subsidiaries. These projects are now operational or expected to
become operational during the third quarter of 1999.

Non-Fuel Operating Expenses and Other Income and Deductions

      Other operating and maintenance  expense-regulated  decreased $2.0 million
from the continued deployment of cost saving-programs  instituted as part of the
PSCo/SPS Merger. Other operating and maintenance

                                       41
<PAGE>

expense-non-regulated increased $4.4 million primarily due to increased costs in
providing energy management and consulting services.

      Depreciation and amortization expense increased $2.8 million primarily due
to higher depreciation expense from property additions.

      Taxes other than income taxes increased  approximately $4.4 million due to
higher  utility  property  tax  accruals  resulting  from an  increase  in plant
investment and higher valuation rates.

      Income taxes declined $8.8 million during the second quarter of 1999, when
compared to the same quarter in 1998,  primarily due to lower pre-tax income and
the recognition of additional Colorado state tax credits.

Six Months Ended June 30, 1999 Compared to the Six Months Ended June 30, 1998

Earnings

      Earnings per share (basic and diluted) were $1.31 for the first six months
of 1999 as compared  to $1.28 per share  (basic and  diluted)  for the first six
months of 1998. The increase in earnings were  primarily  attributed to a higher
electric  margin  resulting from customer  growth and an increased  contribution
from the Company's  investment in Yorkshire  Power.  This increase was partially
offset by a lower gas  margins,  resulting  from mild  weather  during the first
quarter of 1999.

Electric Operations

      The following table details the change in electric  operating revenues and
energy  costs for the first six months of 1999 as compared to the same period in
1998 (thousands of dollars).
                                                      Increase (Decrease)
                                                      -------------------
Electric operating revenues:
 Retail...............................................     $(21,522)
 Wholesale............................................      (17,789)
Other (including unbilled revenues)...................       13,461
                                                            -------
  Total revenues......................................      (25,850)
Fuel used in generation...............................      (25,493)
Purchased power.......................................      (13,083)
                                                            -------
  Net increase in electric margin.....................     $ 12,726
                                                           ========

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

                                              Millions of Kwh Sales
                                              ---------------------
                                                 1999      1998    % Change *
                                                 ----      ----    ----------
Residential................................      4,956     4,896      1.2%
Commercial and Industrial..................     13,336    13,277      0.4
Public Authority...........................        384       378      1.8
                                                 -----     -----
  Total Retail.............................     18,676    18,551      0.7
Wholesale..................................      5,787     6,434    (10.1)
                                                -----     -----
Total......................................     24,463    24,985     (2.1)
                                                ======    ======

Power marketing and trading................     4,434     1,603      **
                                                =====     =====

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

                                       42
<PAGE>

      Electric  margin  increased in the first six months of 1999, when compared
to the first six months of 1998,  due to the positive  impact of shared  savings
under  the  ICA   resulting   from  lower  fuel  and   purchased   energy  costs
(approximately  $5.2 million) and higher sales at PSCo resulting  primarily from
growth in the number of customers served. This was offset, in part, by decreases
in both  retail  and  wholesale  sales at SPS,  primarily  due to mild  weather,
reduced  oil  well  pumping  and the  benefit  of an SPS  1985  FERC  rate  case
settlement  in 1998 which  increased  margin  approximately  $7.7  million.  The
recovery of fuel costs at SPS, of  approximately  $37 million,  reduced revenues
but had no effect on margin.

      Fuel used in generation  expense  decreased $25.5 million during the first
six months of 1999,  as compared to 1998,  primarily  due to reduced  generation
levels at SPS and lower coal and gas costs at SPS.  The lower coal costs are due
to a  reduction  in  transportation  costs,  while the  decrease in gas costs is
attributable  to lower  per-unit gas prices.  Decreased gas costs were partially
offset by  higher  gas  generation  levels at PSCo and SPS,  due to  placing  in
service a new gas generation unit.

     Purchased power expense decreased $13.1 million during the first six months
of 1999, as compared to 1998, primarily due to a lower volume of purchases. This
decrease at PSCo was partially  offset by an increase in purchased power expense
at SPS  resulting  from an increase in  quantity of power  purchased  and higher
capacity charges.

Gas Operations

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

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

Revenues from gas sales (including unbilled revenues).     $(1,482)
Gas purchased for resale..............................       4,325
                                                           -------
 Net decrease in gas sales margin.....................      (5,807)
Transportation revenues...............................       2,006
                                                           -------
 Decrease in net gas margin...........................     $(3,801)
                                                           =======

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

                                      Millions of Dth Deliveries
                                      --------------------------
                                                1999    1998    % Change *
                                                ----    ----    ----------
Residential................................     58.1    58.5      (0.8)%
Commercial.................................     27.4    28.7      (4.6)
                                               -----   -----
  Total Sales..............................     85.5    87.2      (2.0)
Transportation.............................     59.6    54.9       8.7
                                               -----   -----
  Total....................................    145.1   142.1       2.1
                                               =====   =====

Non-regulated gas marketing and trading ...     80.0    31.9      **
                                               =====   =====

*  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 six  months of 1999,  when
compared to the first six months of 1998, primarily due to lower retail sales at
PSCo resulting  from the effects of mild winter weather in 1999,  despite a 3.3%
increase in customers.

                                       43
<PAGE>

      Gas transportation  revenues  increased  approximately $2.0 million during
the  first six  months  of 1999,  when  compared  with the same  period in 1998,
primarily due to higher deliveries at PSCo. The increase in transport deliveries
continues  to be impacted by the  shifting of various  commercial  customers  to
transport customers.

Other Operating Revenues and Equity in Earnings of Unconsolidated Subsidiaries

      Other operating revenues decreased approximately $6.1 million due to lower
revenues from diversified energy businesses,  primarily engineering,  design and
construction  management  and lower  development  fee income from  non-regulated
independent power projects, offset in part by an increase in revenue from energy
management and consulting services.

      Equity  in  earnings   of   Yorkshire   Power  and  other   unconsolidated
subsidiaries  increased  $16.8  million  primarily  due to higher  earnings from
Yorkshire  Power.  NCI's  equity in earnings of  Yorkshire  Power  increased  by
approximately $19 million for the first six months of 1999, when compared to the
same period in 1998,  primarily due to Yorkshire  Power's 1998 recognition of an
impairment of its investment in a U.K.  telecommunications  company  offset,  in
part, by an unrelated tax adjustment. The net effect of these items reduced 1998
earnings  approximately $16.6 million. In addition,  during 1998 Yorkshire Power
recognized a penalty,  applicable to all U.K.  regional  electricity  utilities,
designed  to  recognize  the  effects  of the  delay in  implementation  of full
competition  (NCI's portion was  approximately  $4 million).  Equity losses from
independent power projects reduced earnings during 1999.

      Miscellaneous  income and deductions-net  decreased primarily due to delay
damage penalties  incurred in development of certain  independent power projects
by non-regulated subsidiaries.

Non-Fuel Operating Expenses and Other Income and Deductions

      Other operating and maintenance  expense-regulated  decreased $2.2 million
from the continued deployment of cost saving-programs  instituted as part of the
PSCo/SPS Merger. Other operating and maintenance  expense-nonregulated increased
$7.0 million primarily due to increased operating cost due to the acquisition of
Planergy,  effective April 1, 1998 and higher costs incurred in providing energy
management and consulting services.

      Depreciation and amortization expense increased $9.9 million primarily due
to higher depreciation expense from property additions.

      Taxes other than income taxes increased  approximately $9.2 million due to
higher  utility  property  tax  accruals  as a result  of an  increase  in plant
investment and higher valuation rates.

      Interest  charges and preferred  dividends of subsidiaries  increased $2.5
million  during 1999 as compared  with the same period in 1998.  The increase is
primarily  attributable  to higher average amounts of debt  outstanding  used to
finance  capital  expenditures.  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  $18.8 million during the first six months of 1999,
when  compared  to the same  quarter  in 1998,  primarily  due to lower  pre-tax
income,  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.


                                       44
<PAGE>


Other 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  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 June 30,
1999, all of the remediation and testing phases for all critical IT systems have
been  completed.  For non-IT  systems,  which exist primarily in the generation,
transmission and distribution areas of the business, the inventory,  assessment,
remediation and testing phases have also been  completed.  NCE has achieved "Y2K
Ready" status for all  mission-critical  electrical  generating and transmission
facilities.  Readiness was accomplished by June 30, 1999, in accordance with the
guidelines  established  by the  North  American  Electric  Reliability  Council
("NERC").  NCE is a  participant  in the NERC Y2K Program  that has  established
reporting criteria and milestone dates for electric utilities. The final step of
this program was the submittal of a letter to the president of NERC,  certifying
that the company has met the NERC Y2K goal. NCE submitted its Y2K  certification
letter, without exceptions, with its June 1999 NERC report.

      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 costs of approximately $19 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.  This  revised  estimate  reflects  a $6
million reduction from previously estimated costs due primarily to finding fewer
Y2K related problems than originally  estimated and lower  contingency  planning
costs. 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


                                       45
<PAGE>

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  through the six months ended
June 30, 1999;  and the estimated  costs to be incurred  during the remainder of
1999 and early 2000. A significant portion of the remaining costs to be incurred
consists of finalizing remaining work on non mission-critical  systems, testing,
project management and contingency planning.
                          Actual
                          Costs       Actual      Remaining          Estimated
                          1998        Costs     Estimated Costs    Total Project
                        and Prior      1999     to be Incurred        Costs
                        ---------      -----    --------------        -----
Operating expenses         $8.0        $2.4         $5.5              $15.9
Capital for automated
  system components         0.7         0.6          1.4                2.7
IT replacement projects:
  Operating......           0.2         0.6          0.1                0.9
  Capital........           6.4         7.3          0.7               14.4
                           ----         ---         ----              -----
   Total........          $15.3       $10.9         $7.7              $33.9
                          =====       =====         ====              =====

      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.  If this were to occur, the
Company's  operating  utilities  may be  required  to  "island"  (separate  from
neighboring  interconnected utilities) their generation and distribution systems
in their service  territories.  As part of this  scenario,  difficulty  could be
encountered with the restart of generating  units. The overall blackout recovery
plan for NCE is designed so that this most reasonably likely worst case scenario
would be addressed and electricity  restored.  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 second  quarter of 1999 and $1.16 for the
year-to-date.  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 - Six Months Ended June 30
                                           1999        1998      Decrease
                                           ----        ----      --------
Net cash provided by operating
  activities (in millions) ............   $314.6      $362.8     $(48.2)

      Cash  provided  by  operating  activities  decreased  during the first six
months of 1999,  when compared to the same period in 1998,  primarily due to the
cash  proceeds,  received  in  1998 by SPS and a  non-regulated


                                       46
<PAGE>

subsidiary,  of approximately $67 million for the recovery of deferred costs and
income from the investment in a non-regulated energy development  project.  This
was offset, in part, by lower purchased gas and electric costs.

                                           1999        1998     Increase
                                           ----        ----     --------
Net cash used in investing
  activities (in millions) ...........  $(295.7)    $(270.8)     $(24.9)

      Cash used in investing  activities increased during 1999, when compared to
1998, primarily due to an increase in construction expenditures.

                                           1999        1998     Decrease
                                           ----        ----     --------
Net cash used in financing
 activities (in millions) ............  $  (3.4)    $(57.0)      $ 53.6

      Cash used in financing  activities decreased during 1999, when compared to
1998,  primarily  due to an increase in  short-term  borrowings in 1999 and more
financing  activities  in 1998.  PSCo issued $250 million of  long-term  debt in
April 1998 which was used to repay  short-term and other debt. In May 1998, PSCo
issued $194 million of Trust  Originated  Preferred  Securities  the proceeds of
which were used to redeem all of PSCo's  outstanding  preferred  stock (totaling
$181.8 million) on June 10, 1998 (see Note 7. Obligated  Mandatorily  Redeemable
Preferred  Securities of Subsidiary Trust Holding Soley Subordinated  Debentures
in Item 1. FINANCIAL STATEMENTS).

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 were used
initially for the repayment of certain  short-term debt,  pending the retirement
of $90 million of the SPS 6 7/8% First  Mortgage  Bonds due December 1, 1999 and
for other general corporate purposes.

      On June 29, 1999, PSCo filed a registration  statement to issue up to $500
million of  unsecured  debt.  On July 16,  1999,  PSCo  issued  $200  million of
unsecured  senior  notes,  at an  interest  rate of 6 7/8%,  due July 15,  2009.
Proceeds   were  used  for  general   corporate   purposes   including   capital
expenditures,  repayment of short-term  debt and refunding of long-term  debt on
maturity or otherwise.

Bank Lines of Credit and Compensating Bank Balances

      During the second  quarter of 1999,  PSCo entered into a credit  facility,
which  provides  for $300  million in  committed  lines of credit,  replacing an
existing $150 million  credit  facility.  The credit  facility  expires June 23,
2000.

      During the first quarter of 1999, SPS extended its $200 million  committed
line of credit until February 25, 2000.

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


                                       47
<PAGE>

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 study  and  evaluate  utility
regulations with respect to competition.  Deregulation legislation was passed in
Texas and New Mexico during the second quarter of 1999.

Texas

      In June 1999, an electric utility  restructuring  act was passed in Texas,
which  allows for  retail  competition,  for most areas of the state,  beginning
January 1, 2002. The legislation requires, among other things, a rate freeze for
all  customers,  effective  September  1, 1999 until  January  1,  2002;  a rate
reduction for those residential and small commercial customers who choose not to
switch suppliers at the start of retail competition;  the unbundling of business
activities,   costs  and  rates   relating  to  generation,   transmission   and
distribution  and retail  services;  reductions in NOx and SO2 emissions and the
recovery of stranded costs.  The PUCT can delay the date for retail  competition
if a power  region is unable to offer  fair  competition  and  reliable  service
during pilot  projects  which begin for all  utilities on June 1, 2001 for 5% of
the utility's combined load of all customer classes.  Utilities,  including SPS,
with no  estimated  stranded  costs must direct any excess  earnings  during the
freeze period to improvements in transmission  and distribution  facilities,  to
capital expenditures to improve air quality or to accelerate the amortization of
regulatory assets (subject to PUCT approval).

      The legislation specifically addresses competition in the Texas Panhandle,
where SPS operates,  recognizing  that certain  transmission  constraints  exist
within the region that requires full retail customer choice to develop on a more
structured  schedule  than the rest of the state.  SPS must file a transition to
competition plan with the PUCT by December 1, 2000.

New Mexico

      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. Customers of a municipal utility and
customers of a distribution  cooperative utility will be afforded choice only if
the  respective  utility elects to  participate.  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-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.

Financial Reporting Considerations

      The  Emerging  Issues Task Force  reached a consensus  in Issue No.  97-4,
"Deregulation  of the  Pricing of  Electricity"  ("97-4")  indicating  that when
deregulatory  legislation is passed or when a rate order (whichever is necessary
to effect change in the  jurisdiction)  that contains  sufficient  detail for an
enterprise  to  reasonably  determine  how the  transition  plan will affect the
separable  portion of its business whose pricing is being deregulated is issued,
the  enterprise  should stop applying SFAS 71 to that  separable  portion of its
business.  The  Company is  evaluating  the  provisions  of 97-4  related to the
recently enacted legislation and, at the time such provisions have been met, SPS
will no longer apply SFAS 71.


                                       48
<PAGE>


Accounting Pronouncements Issued But Not Yet Effective

      In June  1998,  the FASB  issued  SFAS  133,  "Accounting  for  Derivative
Instruments and Hedging Activities." This statement requires companies to record
derivatives  on the balance  sheet as assets and  liabilities,  measured at fair
value. Gains or losses resulting from changes in the values of those derivatives
would be accounted  for  depending on the use of the  derivative  and whether it
qualifies  for hedge  accounting.  In July 1999,  the FASB delayed the effective
date for one year, to fiscal years beginning after June 15, 2000. The Company is
currently  evaluating the potential impact of this accounting  standard and will
adopt the standard as required by January 1, 2001.

                                       49
<PAGE>


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

Three  Months  Ended June 30, 1999  Compared to the Three  Months Ended June 30,
1998

Earnings Available for Common Stock

      Earnings were $34.8 million for the second quarter of 1999, as compared to
$28.5  million for the second  quarter of 1998,  primarily due to an increase in
electric margin resulting from strong customer growth of 2.6%.

Electric Operations

      The following table details the change in electric  operating revenues and
energy costs for the three months  ended June  30, 1999, as compared to the same
period in 1998 (in thousands of dollars).

                                              Increase (Decrease)
                                              -------------------
Electric operating revenues:
 Retail.......................................    $   997
 Wholesale....................................     (7,652)
 Other (including unbilled revenues)..........     10,405
                                                  -------
  Total revenues..............................      3,750
Fuel used in generation.......................      5,328
Purchased power...............................    (11,911)
                                                  -------
  Net increase in electric margin.............    $10,333
                                                  =======

       The following table compares electric Kwh sales by major customer classes
for the three months ended June 30, 1999 and 1998.

                                    Millions of Kwh Sales
                                    ---------------------
                                        1999     1998      % Change *
                                        ----     ----      ----------
Residential .....................       1,567    1,501        4.4%
Commercial and Industrial .......       3,799    3,721        2.1
Public Authority ................          60       39       53.0
                                       ------   ------
  Total Retail...................       5,426    5,261        3.1
Wholesale **.....................       1,045    1,409      (25.9)
                                       ------   ------
Total............................       6,471    6,670       (3.0)
                                       ======   ======

*   Percentages are calculated using unrounded amounts
** Excludes power trading activities

      Electric margin  increased in the second quarter of 1999, when compared to
the  second  quarter  of 1998,  primarily  due to  higher  retail  sales of 3.1%
resulting  primarily from customer growth of approximately 2.6% and the positive
impact of shared savings under the ICA (approximately $2.2 million).  The ICA is
a cost  adjustment  mechanism that allows for a 50%/50%  sharing of certain fuel
and energy cost  increases  and  decreases  among  customers  and  shareholders.
Provisions  for  estimated  customer  refunds in  connection  with the  earnings
sharing in excess of 11% return on equity increased  approximately  $2.8 million
in 1999 (see Note 4. Regulatory Matters in Item 1.FINANCIAL STATEMENTS).

      Fuel used in  generation  expense  increased  approximately  $5.3  million
during the second  quarter of 1999,  as  compared  to the same  quarter in 1998,
primarily  due to  increased  generation  levels at PSCo's power plants to serve
retail customers.

     Purchased  power expense  decreased $11.9 million during the second quarter
of 1999,  as  compared  to the same  quarter in 1998,  primarily  due to a lower
volume of purchases.



                                       50
<PAGE>

 Gas Operations

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

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

Revenues from gas sales (including unbilled revenues)        $ 6,978
Gas purchased for resale........................               3,663
                                                             -------
  Net increase in gas sales margin..............               3,315
Transportation revenues.........................                 747
                                                             -------
  Increase in net gas margin....................             $ 4,062
                                                             =======

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

                                  Millions of Dth Deliveries
                                  --------------------------
                                          1999      1998      % Change *
                                          ----      ----      ----------
Residential...................            19.0      18.0         5.3%
Commercial....................             8.8       8.9        (1.3)
                                       -------  --------
  Total Sales.................            27.8      26.9         3.1
Transportation................            23.6      22.8         3.7
                                       -------  --------
  Total.......................            51.4      49.7         3.4
                                       =======  ========

*  Percentages are calculated using unrounded amounts

      Gas sales  margin  increased  during  the  second  quarter  of 1999,  when
compared  to the second  quarter of 1998,  primarily  due to a 3.1%  increase in
retail gas sales resulting from customer growth of approximately 3.4%.

      Gas  transportation  revenues  increased  $0.7  million  during the second
quarter of 1999, compared to the second 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
second  quarter of 1999, as compared to the second  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.

Non-Fuel Operating Expenses and Other Income and Deductions

      Depreciation  and  amortization  increased  $2.0 million during the second
quarter of 1999, as compared to the second quarter of 1998, primarily due to the
depreciation of property additions.

      Taxes other than income taxes increased  approximately $2.7 million during
the second quarter of 1999, as compared to the second quarter of 1998, primarily
due higher property tax accruals  resulting from an increase in plant investment
and higher valuation rates.

      Income  taxes  increased  approximately  $1.2  million  during  the second
quarter of 1999,  as compared to the second  quarter of 1998,  primarily  due to
higher pre-tax income,  despite the recognition of additional Colorado state tax
credits.

                                       51
<PAGE>

      Other  income and  deductions  decreased  $1.1  million  during the second
quarter of 1999,  as compared to the second  quarter of 1998,  primarily  due to
higher  non-utility  operating  expenses  attributed  to affiliate  billings and
customer rebates.

      Interest  charges and  dividend  requirements  and  redemption  premium on
preferred stock increased  approximately  $1.7 million during the second quarter
of 1999,  as compared to the second  quarter of 1998.  The increase is primarily
attributable to costs to finance capital expenditures, including higher interest
costs on short-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).

Six Months Ended June 30, 1999 Compared to the Six Months Ended June 30, 1998

Earnings Available for Common Stock

      Earnings were $100.8 million for the first six months of 1999, as compared
to $94.5  million  for the first six months of 1998.  An  increase  in  electric
margin  resulting from strong customer growth of 2.6% was offset,  in part, by a
lower gas margin,  resulting from unseasonably warm weather in the first quarter
of 1999 and higher non-fuel operating expenses.

Electric Operations

      The following table details the change in electric  operating revenues and
energy  costs for the six months  ended June  30, 1999, as  compared to the same
period in 1998 (in thousands of dollars).

                                              Increase (Decrease)
                                              -------------------
Electric operating revenues:
 Retail.......................................    $10,130
 Wholesale....................................     (1,526)
 Other (including unbilled revenues)..........      1,022
                                                  -------
  Total revenues..............................      9,626
Fuel used in generation.......................      6,564
Purchased power...............................    (21,741)
                                                  -------
  Net increase in electric margin.............    $24,803
                                                  =======

     The following table compares  electric Kwh sales by major customer  classes
for the six months ended June 30, 1999 and 1998.

                                    Millions of Kwh Sales
                                    ---------------------
                                        1999     1998      % Change *
                                        ----     ----      ----------
Residential .....................       3,499    3,356        4.2%
Commercial and Industrial .......       7,720    7,476        3.3
Public Authority ................         108       87       24.7
                                       ------   ------
  Total Retail...................      11,327   10,919        3.7
Wholesale **.....................       2,467    2,903      (15.0)
                                       ------   ------
Total............................      13,794   13,822       (0.2)
                                       ======   ======

*    Percentages are calculated using unrounded amounts
**  Excludes power trading activities

                                       52
<PAGE>

      Electric  margin  increased  during  the  first six  months of 1999,  when
compared to the same period in 1998,  primarily  due to higher  retail  sales of
3.7% resulting  primarily  from customer  growth of  approximately  2.6% and the
positive  impact of shared savings under the ICA  (approximately  $5.2 million).
Provisions  for  estimated  customer  refunds in  connection  with the  earnings
sharing in excess of 11% return on equity was $6.6  million in 1999  compared to
$5.6  million  in 1998  (see Note 4.  Regulatory  Matters  in Item 1.  FINANCIAL
STATEMENTS).

      Fuel used in  generation  expense  increased  approximately  $6.6  million
during the first six months of 1999,  as  compared  to the same  period in 1998,
primarily  due to  increased  generation  levels at PSCo's power plants to serve
retail customers.

      Purchased  power  expense  decreased  $21.7  million  during the first six
months of 1999,  as  compared  to the same  period in 1998,  primarily  due to a
lower volume of purchases.

Gas Operations

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

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

Revenues from gas sales (including unbilled revenues)        $(5,626)
Gas purchased for resale........................                  22
                                                             -------
  Net decrease in gas sales margin..............              (5,648)
Transportation revenues.........................               2,039
                                                             -------
  Decrease in net gas margin....................             $(3,609)
                                                             =======

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

                                   Millions of Dth Deliveries
                                   --------------------------
                                         1999      1998       % Change *
                                         ----      ----       ----------
Residential...................            56.8      56.9          -   %
Commercial....................            25.9      27.3       (5.1)
                                       -------  --------
  Total Sales.................            82.7      84.2       (1.7)
Transportation................            50.1      46.0        8.9
                                       -------  --------
  Total.......................           132.8     130.2        2.1
                                       =======  ========

*  Percentages are calculated using unrounded amounts

      Gas sales  margin  decreased  during  the first six  months of 1999,  when
compared to the same period in 1998,  primarily due to a 1.7% decrease in retail
gas  sales,   resulting  from  the  milder  winter  weather,  with  temperatures
approximately 6.5% warmer than the prior year.

      Gas  transportation  revenues  increased $2.0 million during the first six
months of 1999,  compared  to the same period in 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 six
months ended June 30, 1999,  as compared to the same period in 1998,  had little
impact on net income.  However, the fluctuations in


                                       53
<PAGE>

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 1999
lowered  costs,  but was offset by the  recovery  of costs  previously  deferred
through the GCA.

Non-Fuel Operating Expenses and Other Income and Deductions

      Depreciation and amortization  increased $7.7 million during the first six
months of 1999,  as compared to the same  period in 1998,  primarily  due to the
depreciation of property additions.

      Taxes other than income taxes increased  approximately $6.2 million during
the first six months of 1999, as compared to the same period in 1998,  primarily
due higher property tax accruals  resulting from an increase in plant investment
and higher valuation rates.

      Income taxes  decreased  approximately  $6.4 million  during the first six
months of 1999,  as compared to the same period in 1998,  primarily due to lower
pre-tax income, the recognition of additional Colorado state tax 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  $3.3 million during the first six
months of 1999, as compared to the first six months 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 six
months of 1999  include  approximately  $6.7  million of interest  income on the
promissory note,  excluding  income taxes,  compared to $5.1 million of interest
income in 1998 and the  recognition of equity  earnings  associated  with PSCo's
investment in Yorkshire Power of approximately $3.4 million in the first quarter
of 1998, prior to the sale. In addition, other non-utility income decreased $1.6
million.

      Interest  charges and dividend  requirements  and  redemption  premiums on
preferred stock increased approximately $3.9 million during the first six months
of 1999, as compared to the first six months 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.


                                       54
<PAGE>


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

Three  Months  Ended June 30, 1999  Compared to the Three  Months Ended June 30,
1998

Earnings Available for Common Stock

      Earnings  available for common stock were $22.8 million  during the second
quarter of 1999 compared to $36.9 million for the same quarter in 1998. Earnings
decreased  primarily  due to the  effects  of lower  sales  resulting  from mild
weather during 1999 and the impact of a FERC rate case settlement  recognized in
1998.

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 June 30, 1999, as
compared to the same period in 1998 (thousands of dollars).

                                            Increase (Decrease)
                                            -------------------
     Electric operating revenues:
      Retail..............................        $(22,337)
      Wholesale...........................         (13,551)
      Other (including unbilled revenues).          (4,004)
                                                  --------
        Total revenues....................         (39,892)
     Fuel used in generation..............         (23,750)
     Purchased power......................           4,325
                                                   -------
        Net decrease in electric margin...        $(20,467)
                                                  ========

      The following table compares  electric Kwh sales by major customer classes
for the three months ended June 30, 1999 and 1998.

                                      Millions of Kwh Sales
                                      ---------------------
                                        1999      1998        % Change*
                                     -------      ----        ---------
      Residential ............         629         667          (5.7)%
      Commercial  ............         690         712          (3.1)
      Industrial  ............       2,033       2,098          (3.1)
      Public Authority .......         141         156          (9.6)
                                     -----       -----
        Total Retail..........       3,493       3,633          (3.9)
      Wholesale...............       1,986       2,289         (13.2)
                                     -----       -----
      Total...................       5,479       5,922          (7.5)
                                     =====       =====

* Percentages are calculated using unrounded amounts.

      Electric  operating  revenues  decreased $39.9 million or 15.1% during the
second quarter in 1999, when compared to the same period in 1998,  primarily due
to lower retail and wholesale  revenues (total Kwh sales decreased 7.5%),  lower
revenues  related to the recovery of fuel costs  (totaling  approximately  $24.7
million)  and a $7.7  million  settlement  for a 1985 FERC rate case  settlement
recorded in 1998.  The decrease in Kwh sales  resulted from the mild wet weather
in the second  quarter of 1999,  which  reduced loads for air  conditioning  and
irrigation and a lower level of oil well pumping sales.

      Fuel used in generation  expense  decreased  $23.8 million or 19.5% during
the second quarter of 1999, when compared to the same period in 1998,  primarily
due to an 8.5%  decrease  in  generation  levels  required  to serve  retail and
wholesale  customers and lower coal costs for the quarter.  The decrease in coal
costs is primarily

                                       55
<PAGE>

due to  negotiations  with a new supplier in mid-1998  and lower  transportation
costs. The cost of natural gas used in generation  decreased $3.9 million during
the second quarter of 1999 primarily due to lower generation.

      Purchased  power increased $4.3 million during the second quarter of 1999,
when  compared  to the same  period in 1998,  due to an  increase  in  wholesale
purchases and capacity costs. 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 second quarter of 1999,
when  compared to the second  quarter of 1998,  had little impact on net income.
(See discussion on "SPS Electric Cost Adjustment  Mechanisms" Note 4. Regulatory
Matters - in Item 1. FINANCIAL STATEMENTS).

Non-Fuel Operating Expenses

      Other operating and maintenance expenses decreased $1.2 million during the
second quarter of 1999, as compared to the same period in 1998, primarily due to
lower  administrative  and general expenses and other reductions  resulting from
the  continued  deployment  of cost saving  programs  instituted  as part of the
PSCo/SPS Merger offset, in part, by higher maintenance costs.

      Taxes other than income taxes  increased  $1.2  million  during the second
quarter of 1999, as compared to the same period in 1998, primarily due to higher
property and franchise taxes.

      Income taxes  decreased $8.2 million during the second quarter of 1999, as
compared  to the same  period  in 1998,  primarily  due to the  effect  of lower
pre-tax  income.  The effective  income tax rates for both the second quarter of
1999 and 1998 were 37.1%.

Interest Charges

      Interest charges increased $1.4 million during the second quarter of 1999,
as compared to the same period in 1998,  primarily due to higher  long-term debt
costs,  resulting  from the  issuance of $100  million of new debt in March 1999
offset,  in  part,  by a  decrease  in  the  allowance  for  funds  used  during
construction of  approximately  $0.9 million  resulting from lower  construction
activities. The proceeds from the long-term debt issuance were initially for the
repayment of certain  short-term debt,  pending the retirement of $90 million in
bonds due December 1, 1999, thus lowering other interest expense ($1.6 million).

Six Months Ended June 30, 1999 Compared to the Six Months Ended June 30, 1998

Earnings Available for Common Stock

      Earnings  available  for common  stock were $46.2  million  during the six
months  ended June 30,  1999  compared  to $55.1  million for the same period in
1998.  Earnings decreased  primarily due to the lower earnings recognized during
the second  quarter of 1999 which  resulted  from the effects of mild weather in
1999 and a FERC rate case settlement in 1998.


                                       56
<PAGE>


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 six months ended June  30,1999,  as
compared to the same period in 1998 (thousands of dollars).

                                            Increase (Decrease)
                                            -------------------
     Electric operating revenues:
      Retail..............................        $(33,212)
      Wholesale...........................         (15,936)
      Other (including unbilled revenues).          12,076
                                                  -------
        Total revenues....................         (37,072)
     Fuel used in generation..............         (31,987)
     Purchased power......................           6,789
                                                   -------
        Net decrease in electric margin...        $(11,874)
                                                  ========

      The following table compares  electric Kwh sales by major customer classes
for the six months ended June 30, 1999 and 1998.

                                     Millions of Kwh Sales
                                     ---------------------
                                      1999        1998      % Change*
                                     ------      -----      ---------
      Residential ............       1,346       1,431       (5.9)%
      Commercial  ............       1,359       1,375       (1.2)
      Industrial  ............       3,938       4,112       (4.2)
      Public Authority .......         274         289       (5.2)
                                     -----       -----
        Total Retail..........       6,917       7,207       (4.0)
      Wholesale...............       3,319       3,532       (6.0)
                                     -----       -----
      Total...................      10,236      10,739       (4.7)
                                    ======      ======

* Percentages are calculated using unrounded amounts.

      Electric operating revenues decreased $37.1 million or 8.0% during the six
months ended June 30, 1999, when compared to the same period in 1998,  primarily
due to lower  retail and  wholesale  revenues  resulting  from a decrease in Kwh
sales (4.7%) and lower revenues  related to the recovery of fuel costs (totaling
approximately $37 million) and the $7.7 million  settlement for a 1985 FERC rate
case  settlement  recorded in 1998.  The decrease in Kwh sales was primarily the
result of the mild wet weather, which occurred in the second quarter of 1999 and
a decrease in oil well pumping sales.  Additionally 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.

      Fuel used in generation  expense  decreased  $32.0 million or 15.1% during
the six months  ended June 30, 1999,  when  compared to the same period in 1998,
primarily  due to lower  coal and gas costs for the  current  period  and a 3.8%
decrease 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  gas  used in
generation  decreased  $2.7  million  during the six months  ended June 30, 1999
primarily due to lower gas prices offset, in part, by increased costs related to
higher generation at Cunningham Station during the current period.

      Purchased  power  increased  $6.8 million during the six months ended June
30,  1999,  when  compared  to the same  period in 1998,  due to an  increase in
wholesale  purchases and capacity costs. SPS generates  substantially all of its
power for sale to its firm retail and  wholesale  customers  and sells  non-firm
energy as the

                                       57
<PAGE>

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 six months ended June 30,
1999,  when compared to the six months ended June 30, 1998, had little impact on
net income. (See discussion on "SPS Electric Cost Adjustment Mechanisms" Note 4.
Regulatory Matters - in Item 1. FINANCIAL STATEMENTS).

Non-Fuel Operating Expenses

      Other operating and maintenance expenses decreased $1.8 million during the
six months  ended  June 30,  1999,  when  compared  to the same  period in 1998,
primarily due to lower general and  administrative  expenses,  and the continued
deployment of cost saving  programs  instituted as part of the PSCo/SPS  Merger.
These decreases were offset, in part, by higher maintenance costs.

      Taxes other than income taxes increased $2.5 million during the six months
ended June 30, 1999,  as compared to the same period in 1998,  primarily  due to
higher property and franchise taxes.

      Income taxes  decreased  $5.1 million during the six months ended June 30,
1999,  as compared to the same  period in 1998,  primarily  due to the effect of
lower pre-tax  income.  The effective  income tax rates for the six months ended
June 30, 1999 and 1998 were 37.6% and 37.4%, respectively.

Other Income and Deductions - Net

      Other income and  deductions-net  increased  $1.1  million  during the six
months  ended June 30, 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 expensed in 1998).

Interest Charges

      Interest  charges  increased $1.1 million during the six months ended June
30,  1999,  as  compared  to the same  period in 1998,  primarily  due to higher
long-term debt costs, resulting from the issuance of $100 million in new debt in
March of 1999 and a decrease in the allowance for funds used during construction
of approximately $2.0 million resulting from lower construction activities.  The
new  debt  issuance  was  used in part to pay down  short-term  borrowing,  thus
lowering other interest expense ($2.6 million).

Commitments and Contingencies

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

Financing Activities

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


                                       58
<PAGE>


                           PART II - OTHER INFORMATION

Item 1.  Legal Proceedings

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

Item 4.  Submission of Matters to a Vote of Security Holders

(a) The 1998 Annual Meeting of  Shareholders  of the Company was held on May 11,
1999.

    Three matters were voted upon at the above meeting: 1) the election of four
    class II  directors;  2) the  appointment  of  Arthur  Andersen  LLP as the
    Company's  independent  public accountants for the 1999 calendar year; 3) a
    shareholder  proposal to provide for the elimination of a classified  Board
    of Directors.

    With respect to the election of directors, the votes were as follows:

    Giles M. Forbess       97,960,186 shares for    2,481,044 shares withheld
    Bill D. Helton         97,924,242 shares for    2,516,988 shares withheld
    Albert F. Moreno       97,368,363 shares for    3,072,867 shares withheld
    J. Michael Powers      97,951,525 shares for    2,489,705 shares withheld

    With respect to the  appointment  of Arthur  Andersen LLP as the Company's
    independent  public  accountants,  the vote was:  98,249,664  shares  for;
    1,428,762 shares against; 798,463 shares abstain. The proposal passed.

    With respect to the  shareholder  proposal  regarding the elimination of a
    classified  Board of  Directors,  the vote was :  39,734,874  shares  for;
    44,214,791 shares against;  3,094,394 shares abstain. The proposal did not
    pass.

    There were zero broker non-votes with respect to the election of directors
    and the appointment of Arthur Andersen LLP. Broker non-votes had no effect
    on the outcome of the shareholder proposal.

(b) A special  meeting of the  shareholders  of the Company was held on June 28,
1999.

    One matter was voted upon at the above  special  meeting:  to approve  the
    Agreement  and Plan of Merger,  dated March 24,  1999,  by and between the
    Company and NSP.

    With respect to the approval of the Agreement and Plan of Merger,  the vote
    was:  89,813,018  shares for;  5,089,763  shares against;  1,297,284 shares
    abstain. The proposal passed.

Item 6.  Exhibits and Reports on Form 8-K

(a)   Exhibits

      12(a) Computation of Ratio of Consolidated  Earnings to Consolidated Fixed
            Charges for PSCo is set forth at page 63 herein.
      12(b) Computation of Ratio of Consolidated  Earnings to Consolidated Fixed
            Charges for SPS is set forth at page 64 herein.

      15(a) Letter  from  Arthur  Andersen  LLP  regarding   unaudited   interim
            information is set forth at page 65 herein for NCE.
      15(b) Letter  from  Arthur  Andersen  LLP  regarding   unaudited   interim
            information is set forth at page 66 herein for PSCo.
      15(c) Letter  from  Arthur  Andersen  LLP  regarding   unaudited   interim
            information is set forth at page 67 herein for SPS.

                                       59
<PAGE>

      27(a) Financial Data Schedule for NCE as of June 30, 1999.
      27(b) Financial Data Schedule for PSCo as of June 30, 1999.
      27(c) Financial Data Schedule for SPS as of June 30, 1999.

(c) Reports on Form 8-K

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

- - A combined  report on Form 8-K dated June 28, 1999,  was filed  separately  by
NCE,  PSCo and SPS on June 28,  1999.  The items  reported  were  Item 5.  Other
Events:  Special shareholder meetings were held on June 28, 1999, which approved
the NCE/NSP Merger; and Item 7. Financial Statements and Exhibits: Press release
filed as Exhibit 99 providing  additional  information  about the merger to form
Xcel Energy Inc.

- - A report on Form 8-K dated July 13, 1999,  was filed by PSCo on July 22, 1999.
The items reported were Item 5. Other Events:  Documents related to the issuance
of $200,000,000  aggregate principal amount of Series A Senior Notes and Item 7.
Financial Statements and Exhibits.

                                       60
<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
16th day of August, 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 16th day of August, 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 16th day of August, 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

                                       61
<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).

12(a) Computation  of Ratio  of  Consolidated  Earnings  to  Consolidated  Fixed
      Charges for PSCo is set forth at page 63 herein.

12(b) Computation  of Ratio  of  Consolidated  Earnings  to  Consolidated  Fixed
      Charges for SPS is set forth at page 64 herein.

15(a) Letter from Arthur Andersen LLP regarding unaudited interim information is
      set forth at page 65 herein for NCE.

15(b) Letter from Arthur Andersen LLP regarding unaudited interim information is
      set forth at page 66 herein for PSCo.

15(c) Letter from Arthur Andersen LLP regarding unaudited interim information is
      set forth at page 67 herein for SPS.

27(a) Financial Data Schedule for NCE as of June 30, 1999.

27(b) Financial Data Schedule for PSCo as of June 30, 1999.

27(c) Financial Data Schedule for SPS as of June 30, 1999.

*  Previously filed as indicated and incorporated herein by reference.


                                       62
<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)



                                                     Six Months Ended
                                                         June 30,
                                                      1999       1998
                                                      ----       ----
                                           (Thousands of Dollars, except ratios)

Fixed charges:
   Interest on long-term debt...................    $ 57,627   $ 57,271
   Interest on borrowings against corporate-owned
      life insurance contracts..................      28,268     24,605
   Other interest...............................      11,961     10,152
   Amortization of debt discount and expense less
      premium ..................................       2,166      1,995
   Interest component of rental expense.........       4,591      4,139
   Dividends on PSCo obligated mandatorily
      redeemable preferred securities...........       7,600      2,111
                                                      ------     ------

     Total......................................    $112,213   $100,273
                                                    ========   ========

Earnings (before fixed charges and taxes on income):
   Net income...................................    $100,759   $ 99,805
   Fixed charges as above.......................     112,212    100,273
   Provisions for Federal and state taxes on income,
   net of investment tax credit amortization....      43,982     50,368
                                                      ------     ------

     Total......................................    $256,953   $250,446
                                                    ========   ========

Ratio of earnings to fixed charges..............       2.29       2.50
                                                     ======     ======

                                       63
<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)



                                                     Six Months Ended
                                                         June 30,
                                                      1999       1998
                                                      ----       ----
                                           (Thousands of Dollars, except ratios)

Fixed charges:
   Interest on long-term debt...................     $23,714    $ 21,980
   Other interest...............................       2,549       5,112
   Amortization of debt discount and expense less
      premium                                          1,121       1,121
   Interest component of rental expense.........         382         404
   Dividends on SPS obligated mandatorily redeemable
      preferred securities......................       3,925       3,925
                                                      ------      ------

     Total......................................     $31,691    $ 32,542
                                                     =======    ========

Earnings (before fixed charges and taxes on income):
   Net income...................................     $ 46,226   $ 55,056
   Fixed charges as above.......................       31,691     32,542
   Provisions for Federal and state taxes on income,
   net of investment tax credit amortization....       27,848     32,954
                                                       ------     ------

     Total......................................     $105,765   $120,552
                                                     ========   ========

Ratio of earnings to fixed charges..............         3.34       3.70
                                                         ====       ====


                                       64
<PAGE>



                                                                   EXHIBIT 15(a)

August 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; its
Registration Statements (Form S-3, File Nos. 333-40361 and 333-64067) pertaining
to the  registration  of NCE Common Stock and 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 its Form 10-Q for the quarter ended
June 30, 1999,  which  includes  our report dated August 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



                                       65
<PAGE>



                                                                   EXHIBIT 15(b)

August 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  Registration  Statement (Form S-3, File No.  333-81791)
pertaining to the shelf  registration  of Public  Service  Company of Colorado's
Senior Debt Securities its Form 10-Q for the quarter ended June 30, 1999,  which
includes our report dated August 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



                                       66
<PAGE>



                                                                   EXHIBIT 15(c)
August 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 its Form 10-Q for the quarter ended June 30, 1999,  which includes
our report dated August 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




                                       67

<TABLE> <S> <C>

<ARTICLE>        UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION EXTRACTED FROM NEW CENTURY
ENERGIES,  INC.  CONSOLIDATED  CONDENSED  BALANCE  SHEET AS OF JUNE 30, 1999 AND
CONSOLIDATED  CONDENSED  STATMENTS  OF INCOME  AND CASH FLOWS FOR THE SIX MONTHS
ENDED JUNE 30,  1999 AND IS  QUALIFIED  IN ITS  ENTIRETY  BY  REFERENCE  TO SUCH
FINANCIAL STATMENTS.
</LEGEND>
<CIK>            0001004858
<NAME>           New Century Energies, Inc.
<MULTIPLIER>                                                       1,000

<S>                                                    <C>
<PERIOD-TYPE>                                                      6-MOS
<FISCAL-YEAR-END>                                            DEC-31-1998
<PERIOD-END>                                                 JUN-30-1999
<BOOK-VALUE>                                                    PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                      6,034,650
<OTHER-PROPERTY-AND-INVEST>                                      417,899
<TOTAL-CURRENT-ASSETS>                                           713,531
<TOTAL-DEFERRED-CHARGES>                                         588,650
<OTHER-ASSETS>                                                         0
<TOTAL-ASSETS>                                                 7,754,730
<COMMON>                                                         115,242
<CAPITAL-SURPLUS-PAID-IN>                                      1,781,188
<RETAINED-EARNINGS>                                              757,481
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                 2,644,501
                                            294,000
                                                            0
<LONG-TERM-DEBT-NET>                                           2,091,758
<SHORT-TERM-NOTES>                                                33,875
<LONG-TERM-NOTES-PAYABLE>                                              0
<COMMERCIAL-PAPER-OBLIGATIONS>                                   510,222
<LONG-TERM-DEBT-CURRENT-PORT>                                    306,776
                                              0
<CAPITAL-LEASE-OBLIGATIONS>                                       34,971
<LEASES-CURRENT>                                                   2,196
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                 1,836,431
<TOT-CAPITALIZATION-AND-LIAB>                                  7,754,730
<GROSS-OPERATING-REVENUE>                                      1,715,529
<INCOME-TAX-EXPENSE>                                              58,149
<OTHER-OPERATING-EXPENSES>                                     1,408,117
<TOTAL-OPERATING-EXPENSES>                                     1,408,117
<OPERATING-INCOME-LOSS>                                          307,412
<OTHER-INCOME-NET>                                                 6,873
<INCOME-BEFORE-INTEREST-EXPEN>                                   314,285
<TOTAL-INTEREST-EXPENSE>                                         105,601
<NET-INCOME>                                                     150,535
                                            0
<EARNINGS-AVAILABLE-FOR-COMM>                                          0
<COMMON-STOCK-DIVIDENDS>                                         133,517
<TOTAL-INTEREST-ON-BONDS>                                         85,352
<CASH-FLOW-OPERATIONS>                                           314,639
<EPS-BASIC>                                                       1.31
<EPS-DILUTED>                                                       1.31


</TABLE>

<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 JUNE 30, 1999 AND  CONSOLIDATED  CONDENSED  STATEMENTS OF INCOME AND
CASH  FLOWS FOR THE SIX  MONTHS  ENDED  JUNE 30,  1999 AND IS  QUALIFIED  IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>            0000081018
<NAME>           Public Service Company of Colorado
<MULTIPLIER>                                                  1,000

<S>                                               <C>
<PERIOD-TYPE>                                                 6-MOS
<FISCAL-YEAR-END>                                       DEC-31-1998
<PERIOD-END>                                            JUN-30-1999
<BOOK-VALUE>                                               PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                 4,168,787
<OTHER-PROPERTY-AND-INVEST>                                 215,403
<TOTAL-CURRENT-ASSETS>                                      423,860
<TOTAL-DEFERRED-CHARGES>                                    353,921
<OTHER-ASSETS>                                                    0
<TOTAL-ASSETS>                                            5,161,971
<COMMON>                                                          0
<CAPITAL-SURPLUS-PAID-IN>                                 1,302,119
<RETAINED-EARNINGS>                                         334,883
<TOTAL-COMMON-STOCKHOLDERS-EQ>                            1,637,002
                                       194,000
                                                       0
<LONG-TERM-DEBT-NET>                                      1,417,602
<SHORT-TERM-NOTES>                                                0
<LONG-TERM-NOTES-PAYABLE>                                         0
<COMMERCIAL-PAPER-OBLIGATIONS>                              460,025
<LONG-TERM-DEBT-CURRENT-PORT>                               215,451
                                         0
<CAPITAL-LEASE-OBLIGATIONS>                                  34,962
<LEASES-CURRENT>                                              2,081
<OTHER-ITEMS-CAPITAL-AND-LIAB>                            1,200,848
<TOT-CAPITALIZATION-AND-LIAB>                             5,161,971
<GROSS-OPERATING-REVENUE>                                 1,155,035
<INCOME-TAX-EXPENSE>                                         43,982
<OTHER-OPERATING-EXPENSES>                                  934,491
<TOTAL-OPERATING-EXPENSES>                                  978,473
<OPERATING-INCOME-LOSS>                                     176,562
<OTHER-INCOME-NET>                                             (735)
<INCOME-BEFORE-INTEREST-EXPEN>                              175,827
<TOTAL-INTEREST-EXPENSE>                                     75,068
<NET-INCOME>                                                100,759
                                       0
<EARNINGS-AVAILABLE-FOR-COMM>                               100,759
<COMMON-STOCK-DIVIDENDS>                                     91,089
<TOTAL-INTEREST-ON-BONDS>                                    59,791
<CASH-FLOW-OPERATIONS>                                      276,799
<EPS-BASIC>                                                 0.000
<EPS-DILUTED>                                                 0.000


</TABLE>

<TABLE> <S> <C>

<ARTICLE>        UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SOUTHWESTERN
PUBLIC SERVICE COMPANY CONDENSED BALANCE SHEET AS OF JUNE 30, 1999 AND CONDENSED
STATEMENTS  OF INCOME AND CASH FLOWS FOR THE SIX MONTHS  ENDED JUNE 30, 1999 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>            0000092521
<NAME>           Southwestern Public Service Company
<MULTIPLIER>                                                  1,000

<S>                                               <C>
<PERIOD-TYPE>                                                 6-MOS
<FISCAL-YEAR-END>                                       DEC-31-1998
<PERIOD-END>                                            JUN-30-1999
<BOOK-VALUE>                                               PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                 1,755,500
<OTHER-PROPERTY-AND-INVEST>                                 124,736
<TOTAL-CURRENT-ASSETS>                                      140,753
<TOTAL-DEFERRED-CHARGES>                                    170,787
<OTHER-ASSETS>                                                    0
<TOTAL-ASSETS>                                            2,191,776
<COMMON>                                                          0
<CAPITAL-SURPLUS-PAID-IN>                                   348,402
<RETAINED-EARNINGS>                                         393,676
<TOTAL-COMMON-STOCKHOLDERS-EQ>                              742,078
                                       100,000
                                                       0
<LONG-TERM-DEBT-NET>                                        630,531
<SHORT-TERM-NOTES>                                            9,000
<LONG-TERM-NOTES-PAYABLE>                                         0
<COMMERCIAL-PAPER-OBLIGATIONS>                               49,697
<LONG-TERM-DEBT-CURRENT-PORT>                                90,113
                                         0
<CAPITAL-LEASE-OBLIGATIONS>                                       0
<LEASES-CURRENT>                                                  0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                              570,357
<TOT-CAPITALIZATION-AND-LIAB>                             2,191,776
<GROSS-OPERATING-REVENUE>                                   426,666
<INCOME-TAX-EXPENSE>                                         27,848
<OTHER-OPERATING-EXPENSES>                                  326,977
<TOTAL-OPERATING-EXPENSES>                                  354,825
<OPERATING-INCOME-LOSS>                                      71,841
<OTHER-INCOME-NET>                                            4,460
<INCOME-BEFORE-INTEREST-EXPEN>                               76,301
<TOTAL-INTEREST-EXPENSE>                                     30,075
<NET-INCOME>                                                 46,226
                                       0
<EARNINGS-AVAILABLE-FOR-COMM>                                46,226
<COMMON-STOCK-DIVIDENDS>                                     42,368
<TOTAL-INTEREST-ON-BONDS>                                    24,834
<CASH-FLOW-OPERATIONS>                                       44,477
<EPS-BASIC>                                                 0.000
<EPS-DILUTED>                                                 0.000


</TABLE>


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