ONEOK Partners Reports Strong Fourth-Quarter and Full-Year 2006 Results

February 26, 2007

TULSA, Okla., Feb 26, 2007 /PRNewswire-FirstCall via COMTEX News Network/ -- ONEOK Partners, L.P. (NYSE: OKS) today reported net income of $445.2 million, or $5.01 per unit, for the full year 2006 compared with $147.0 million, or $2.93 per unit, for the full year 2005. The full year 2006 included a $113.9 million, or $1.51 per unit, gain from the sale of a 20 percent interest in Northern Border Pipeline Company.

Fourth-quarter 2006 net income was $80.3 million, or 82 cents per unit, compared with net income of $35.9 million, or 72 cents per unit, for fourth quarter 2005. Fourth-quarter and full-year 2006 results reflect the April 2006 acquisition of ONEOK, Inc.'s (NYSE: OKE) former gathering and processing, natural gas liquids, and pipelines and storage segments.

"Our 2006 results demonstrate the value created by the transforming transactions we completed last spring," said John W. Gibson, president and chief executive officer of ONEOK Partners. "Each of our business segments exhibited strong performance during the year, particularly our gathering and processing segment, which benefited from strong commodity prices and wider gross processing spreads."

Cash flow, as measured by earnings before interest, taxes, depreciation and amortization (EBITDA), was $728.6 million for the full year 2006, compared with $372.0 million for the full year 2005. Fourth-quarter 2006 EBITDA was $142.0 million, compared with $94.0 million in the fourth quarter 2005.

Distributable cash flow (DCF) for the full year 2006 was $369.0 million, or $4.49 per unit, compared with $183.1 million, or $3.71 per unit, for the full year 2005. Fourth-quarter 2006 DCF was $89.6 million, or 93 cents per unit, compared with $41.9 million, or 84 cents per unit, in the fourth quarter 2005.

    2006 HIGHLIGHTS INCLUDED:

     *  The April 2006 acquisition of assets from ONEOK for $3 billion, and
        the sale of 20 percent of Northern Border Pipeline and the resulting
        $113.9 million gain on sale;
     *  A subsidiary of ONEOK becoming the sole general partner and increasing
        its overall ownership in the partnership to 45.7 percent;
     *  The name and ticker symbol change to ONEOK Partners, L.P. (NYSE: OKS)
        from Northern Border Partners, L.P. (NYSE: NBP);
     *  Governance changes replacing the policy and governance committees with
        a board of directors of ONEOK Partners GP, consisting of six members,
        three of whom are independent and will serve as the audit committee;
     *  Four consecutive quarterly distribution increases to 98 cents from 80
        cents per unit, resulting in a 23 percent increase since the beginning
        of 2006;
     *  Unit price appreciation in 2006 of 51 percent;
     *  The announcement of more than $1.1 billion of internally generated
        growth projects;
     *  The announcement of the Overland Pass natural gas liquids pipeline
        project, linking the NGL production area in the Rocky Mountain region
        to the partnership's facilities at Conway, Kan., and related
        infrastructure upgrades;
     *  The April 2006 acquisition of the remaining 66-2/3 percent interest in
        Guardian Pipeline;
     *  Continuing progress on extending both the Guardian and Midwestern
        interstate pipelines;
     *  The September 2006 issuance of $1.4 billion of senior unsecured notes
        to refinance debt used to fund the acquisition of assets from ONEOK;
     *  The successful start-up of Northern Border Pipeline's Chicago III
        expansion project;
     *  The approval of the Northern Border Pipeline rate case by the Federal
        Energy Regulatory Commission;
     *  The purchase of an underground natural gas liquids storage facility in
        Mont Belvieu, Texas, and related infrastructure improvements totaling
        approximately $40 million.

    FOURTH-QUARTER AND FULL-YEAR BUSINESS UNIT RESULTS

    Gathering and Processing Segment

For the full year 2006, the natural gas gathering and processing segment reported EBITDA of $249.1 million, compared with $83.8 million in 2005. Operating income for the full year 2006 increased to $180.2 million, compared with $44.7 million for the full year 2005. The gathering and processing assets acquired from ONEOK accounted for most of the additional EBITDA and operating income.

Net margins for the full year of 2006 increased $275.5 million, compared with 2005. Operating costs for the segment increased $113.0 million during the full-year period, while depreciation and amortization expense increased $27.0 million. The increases in net margins, operating costs and depreciation and amortization expense were primarily due to the acquisition of the assets from ONEOK.

The gathering and processing segment reported strong fourth-quarter 2006 results, including EBITDA of $49.0 million, compared with $20.9 million in fourth quarter 2005. Operating income increased to $31.2 million in the fourth quarter 2006, compared with $12.1 million in the fourth quarter 2005. Net margins were $92.7 million in fourth quarter 2006, compared with $25.7 million in fourth quarter 2005. These improved results were primarily due to the acquisition of the ONEOK gathering and processing assets, which recorded net margins of $64.5 million in the quarter.

The following table contains margin information for the periods indicated. NGL shrink, plant fuel and condensate shrink refer to the Btus that are removed from natural gas through the gathering and processing operation.

                                                  Years Ended December 31,
                                                 2006       2005       2004
    Keep-whole
      NGL shrink (MMBtu/d)                     37,029        ---        ---
      Plant fuel (MMBtu/d)                      4,959        ---        ---
      Condensate shrink (MMBtu/d)               3,328        ---        ---
      Condensate sales (Bbl/d)                    683        ---        ---
      Percentage of total net margin              16%         0%         0%
    Percent of proceeds
      Wellhead purchases (MMBtu/d)            121,199        ---        ---
      NGL sales (Bbl/d)                         7,364      2,376      2,092
      Residue sales (MMBtu/d)                  28,855     12,502     10,285
      Condensate sales (Bbl/d)                  1,103        ---        ---
      Percentage of total net margin              55%        57%        39%
    Fee-based
      Wellhead volumes (MMBtu/d)            1,168,478    274,359    204,085
      Average rate ($/MMBtu)                    $0.25      $0.41      $0.59
      Percentage of total net margin              29%        43%        61%



The realized gross processing spread in 2006 of $5.05 per MMBtu was significantly higher than the five-year average of $2.55. Based on current market conditions, the gross processing spread for 2007 is expected to continue to be at or above the most recent five-year average.

The gathering and processing segment is exposed to commodity price risk primarily as a result of revenue from the sale of commodities received in exchange for services. The following table sets forth the gathering and processing segment's hedging information for 2007.

                                          Year Ending December 31, 2007
                                                   Average       Percent of
                                      Volumes     Price Per       Expected
    Product                            Hedged        Unit         Volumes
    Percent of Proceeds
      Natural gas liquids (Bbl/d) (a)  2,320        $40.23           33%
    Keep-whole
      Gross Processing Spread
       (MMBtu/d) (a)                   6,410         $3.06           31%

    (a) Hedged with fixed-price swaps



The partnership estimates that a 10 cent per MMBtu increase in the price of natural gas would decrease annual net margin by approximately $0.1 million. Also, a 1 cent per gallon increase in the composite price of natural gas liquids would increase annual net margin by approximately $2.1 million. A $1.00 per barrel increase in the price of crude oil would increase annual net margin by approximately $0.4 million. All of these sensitivities exclude the effects of hedging.

The following full-year comparison of financial results of the assets acquired from ONEOK is provided for additional analysis of the gathering and processing segment. The ONEOK transactions were accounted for at historical cost and therefore, the information is comparable between periods.

     *  Net margins for the acquired assets increased $56.3 million for 2006,
        compared with 2005, primarily as a result of an increase of $40.2
        million due to higher realized gross processing spreads on keep-whole
        contracts, net of hedging, and an increase of $29.7 million resulting
        from favorable commodity pricing for natural gas and NGL products on
        percent-of-proceeds contracts, net of hedging.  These increases were
        partially offset by a decrease of $14.1 million from reduced gathered
        and processed volumes due to natural reserve declines and contract
        terminations.

     *  Operating costs for the acquired assets increased $8.7 million for
        2006, compared with 2005, primarily due to higher legal costs and
        higher employee costs.

    Natural Gas Liquids Segment

The natural gas liquids segment reported EBITDA of $110.1 million and operating income of $88.7 million for the full year of 2006. Net margins were $167.0 million, operating costs were $57.5 million, and depreciation and amortization expense was $20.7 million. All of these financial results for the full year of 2006 are entirely incremental to the partnership due to the acquisition of ONEOK's former natural gas liquids segment in April 2006.

In the fourth quarter 2006, the natural gas liquids segment reported EBITDA of $29.0 million, operating income of $24.1 million, and net margins of $44.8 million. Operating costs for the segment were $16.1 million in the fourth quarter, while depreciation and amortization expense was $4.6 million in the period. All of these financial results are entirely incremental to the partnership due to the acquisition of ONEOK's former natural gas liquids segment in April 2006.

Full-year 2006 results of the assets acquired from ONEOK, compared with 2005, include an additional six months ownership of the natural gas liquids assets. ONEOK acquired a substantial portion of these assets from Koch in July 2005, resulting in a $79.1 million increase in net margin, a $24.1 million increase in operating costs and a $9.7 million increase in depreciation and amortization expense. The transactions with ONEOK were accounted for at historical cost and therefore the information is comparable between the periods.

Pipelines and Storage Segment

The pipelines and storage segment reported EBITDA of $139.1 million for the full year 2006. Operating income was $107.9 million, net margins were $210.1 million and operating costs were $72.8 million. Depreciation and amortization expense was $30.3 million. These results are entirely incremental to the partnership due to the partnership's acquisition of ONEOK's pipelines and storage segment in April 2006.

The pipelines and storage segment reported EBITDA of $34.6 million in the fourth quarter 2006. Operating income was $26.7 million, and net margins were $54.4 million. Operating costs for the segment were $20.1 million in the fourth quarter, and depreciation and amortization expense was $7.6 million. The financial results for the segment are entirely incremental to the partnership due to the partnership's acquisition of ONEOK's former pipelines and storage segment in April 2006.

The following full-year comparison of financial results of the assets acquired from ONEOK is provided for additional analysis of the pipelines and storage segment. The transactions with ONEOK were accounted for at historical cost and therefore, the information is comparable between the periods. ONEOK acquired certain of these pipelines and storage assets from Koch in July 2005.

     *  Net margin for the acquired assets increased $38.5 million for 2006,
        compared with 2005, primarily due to an increase of $33.9 million
        related to the additional six months ownership of the assets ONEOK
        acquired from Koch, an increase of $6.6 million from natural gas
        transportation as a result of higher realized rates and higher volumes
        in the commodity-based short-term business and an improved fuel
        position, offset by a decrease of $1.9 million due to lower sales of
        equity natural gas from inventory.

     *  Operating costs for the acquired assets increased $9.6 million for
        2006, compared with 2005, primarily due to increased operating expense
        associated with the additional six months of ownership of the natural
        gas liquids gathering and distribution pipelines ONEOK acquired from
        Koch.

    Interstate Natural Gas Pipelines Segment

The interstate natural gas pipeline segment contributed full-year 2006 EBITDA of $245.6 million, compared with $285.9 million in 2005. Operating income for the full year decreased to $158.5 million from $214.2 million for the full year of 2005. The decrease of $55.7 million is caused by the decrease of $192.7 million related to Northern Border Pipeline no longer being consolidated as of Jan. 1, 2006, partially offset by the $113.9 million gain on the sale of the 20 percent partnership interest in Northern Border Pipeline. Operating income increased $21.4 million due to the acquisition of the remaining 66-2/3 percent interest in Guardian Pipeline.

Net margins decreased to $94.7 million for the full-year 2006, compared with $378.7 million in 2005. Operating costs decreased $61.7 million in 2006, while depreciation and amortization expense decreased $52.7 million. All of these decreases were primarily a result of the deconsolidation of Northern Border Pipeline related to the sale of a 20 percent interest in the pipeline, partially offset by increases due to the consolidation of Guardian Pipeline beginning Jan. 1, 2006, to reflect the partnership's April 2006 acquisition of the remaining interests in the pipeline.

Equity earnings from investments for 2006 were $72.4 million, representing the partnership's 50 percent interest in Northern Border Pipeline that is no longer consolidated as of Jan.1, 2006. Equity earnings from investments for 2005 were $2.3 million, representing the partnership's 33-1/3 percent interest in Guardian Pipeline that is now consolidated.

Minority interest for 2006 of $1.9 million primarily represents the 66-2/3 percent interest in Guardian Pipeline that the partnership did not own until it acquired the remaining interests in April 2006. The minority interest for 2005 of $45.7 million represents the 30 percent interest in Northern Border Pipeline owned by TC PipeLines, LP, when Northern Border Pipeline's results were consolidated.

For the fourth quarter 2006, the interstate natural gas pipelines segment contributed EBITDA of $30.6 million, compared with $71.9 million in the fourth quarter 2005. EBITDA includes equity earnings from investments for the fourth quarter 2006 of $16.7 million, compared with $1.1 million in the fourth quarter 2005, due to the deconsolidation of Northern Border Pipeline. Equity earnings from investments for the three months ended Dec. 31, 2005, represent the partnership's 33-1/3 percent interest in Guardian Pipeline that is now consolidated.

Fourth-quarter 2006 operating income for the segment was $10.3 million, compared with $53.5 million for the same period in 2005. Net margins decreased $72.8 million, compared with the same period last year. Operating costs decreased $15.8 million in the fourth quarter 2006, while depreciation and amortization expense decreased $13.7 million, compared with the same period in 2005. The decreases in operating income, net margins and operating costs were primarily the result of the Northern Border Pipeline deconsolidation, offset by the effects of the Guardian Pipeline consolidation in 2006.

GROWTH ACTIVITIES

During 2006, the partnership announced approximately $1.1 billion of internally generated growth projects expected to be constructed and placed in service prior to the end of 2008. They include a joint venture to build Overland Pass Pipeline, a 750-mile natural gas liquids pipeline extending from Opal, Wyo., to Conway, Kan., with start up scheduled for early 2008; an additional investment of $216 million planned to expand existing NGL fractionation capabilities and the capacity of natural gas liquids distribution pipelines; the $241 million Guardian expansion and extension project targeted to be in service in November 2008; and the $35 million Midwestern Gas Transmission eastern extension targeted to be in service in the fourth quarter 2007.

In October 2006, the partnership purchased an underground natural gas liquids storage facility in Mont Belvieu, Texas; the purchase price and related infrastructure improvements will cost approximately $40 million. In January 2007, the partnership announced that Fort Union Gas Gathering, L.L.C. is planning a $110 million expansion of its existing gathering pipeline capacity. A subsidiary of the partnership owns a 37 percent interest in Fort Union Gas Gathering.

In June 2006, the partnership signed a non-binding letter of intent to form a joint venture to construct a new interstate natural gas pipeline that would have created new pipeline capacity for constrained wellhead production in north Texas and central Oklahoma. In January 2007, the partnership withdrew from the letter of intent but continues to work with Boardwalk Pipeline Partners, LP, among others, to determine the feasibility of a project to deliver incremental volumes to Texas Gas Transmission, L.L.C.

DISTRIBUTION DECLARATION

On Jan. 16, 2007, the board of directors of the general partner of ONEOK Partners, L.P. declared a 1 cent increase in the partnership's quarterly cash distribution to 98 cents per unit for the fourth quarter of 2006. The indicated annual rate is $3.92. The increase was the fourth consecutive quarter of distribution increases for the partnership, representing a 23 percent increase in the distribution amount since the beginning of 2006.

SPECIAL MEETING AND PROXY VOTE

On Feb. 1, 2007, the partnership announced that it will hold a special meeting of its common unitholders on Mar. 29, 2007, at 10 a.m. local time, at its headquarters in Tulsa, Okla.

The meeting will allow common unitholders to vote on two proposals: conversion of the partnership's Class B units into common units; and certain amendments to the partnership agreement.

ONEOK Partners' board recommends that common unitholders vote in favor of both of these proposals.

Under the current terms of the Class B units, failure to approve the conversion proposal and the amendment proposal will result in increased distributions, effective as of April 7, 2007, to the holders of the Class B units equal to 110 percent of the distributions due to common unitholders (and in certain circumstances, 123.5 percent of distributions), reducing the amount of funds available for distribution to holders of common units.

ONEOK Partners has filed a proxy statement and other documents with the Securities and Exchange Commission, and has mailed the proxy statement to unitholders of record as of Jan. 29, 2007. Unitholders are urged to read carefully the proxy statement, because it contains important information regarding the proposed unit conversion and related amendments to the partnership agreement. A copy of the proxy statement can be obtained without charge, by contacting D.F. King & Co., Inc., which is assisting ONEOK Partners, toll-free at 1-800-549-6746.

ONEOK Partners unitholders who have questions regarding the proposals or need assistance voting their common units, should contact D.F. King & Co., Inc., who is acting as information agent for ONEOK Partners, as follows:

     D.F. King & Co., Inc.
     48 Wall Street
     New York, New York 10005
     Toll-Free: 1-800-549-6746
     Call Collect:  1-212-269-5550

    CONFERENCE CALL

Management of ONEOK Partners and ONEOK, Inc. will conduct a joint conference call on Tuesday, Feb. 27, 2007, at 11 a.m. Eastern Standard Time (10 a.m. Central Standard Time). The call will also be carried live on ONEOK's and ONEOK Partners' Web sites.

To participate in the telephone conference call, dial 866-814-8448, pass code 1024620, or log on to http://www.oneokpartners.com or http://www.oneok.com .

If you are unable to participate in the conference call or the webcast, the replay will be available on ONEOK Partners' Web site http://www.oneokpartners.com and ONEOK's Web site http://www.oneok.com through Mar. 4, 2007. A recording will be available by phone for seven days. The playback call may be accessed at 866-837-8032, pass code 1024620.

NON-GAAP FINANCIAL MEASURES

The partnership has disclosed in this news release EBITDA and DCF amounts that are non-GAAP financial measures. Management believes EBITDA and DCF provide useful information to investors as a measure of comparison with peer companies. However, these calculations may vary from company to company, so the partnership's computations may not be comparable with those of other companies. DCF is not necessarily the same as available cash as defined in ONEOK Partners' partnership agreement. Management further uses EBITDA to compare the financial performance of its segments and to internally manage those business segments. Reconciliations of EBITDA to operating and net income, and computations of DCF for the three and twelve months ended Dec. 31, 2006, and 2005, are included in the financial tables attached to this release.

ONEOK Partners, L.P. (NYSE: OKS) is one of the largest publicly traded limited partnerships, and is a leader in the gathering, processing, storage and transportation of natural gas in the U.S. and owns one of the nation's premier natural gas liquids (NGL) systems, connecting much of the natural gas and NGL supply in the Mid-Continent with key market centers. Its general partner is a wholly owned subsidiary of ONEOK, Inc. (NYSE: OKE), a diversified energy company, which owns 45.7 percent of the overall partnership interest. ONEOK is one of the largest natural gas distributors in the United States, and its energy services operation focuses primarily on marketing natural gas and related services throughout the U.S.

For more information about ONEOK Partners, L.P., visit: http://www.oneokpartners.com .

Some of the statements contained and incorporated in this new release are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The forward-looking statements relate to our anticipated financial performance, management's plans and objectives for our future operations, our business prospects, the outcome of regulatory and legal proceedings, market conditions and other matters. The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements in certain circumstances. The following discussion is intended to identify important factors that could cause future outcomes to differ materially from those set forth in the forward-looking statements.

Forward-looking statements include the items identified in the preceding paragraph, the information concerning possible or assumed future results of our operations and other statements contained or incorporated in this Annual Report on Form 10-K identified by words such as "anticipate," "plan," "estimate," "expect," "forecast," "intend," "believe," "projection," "goal" or other similar phrases.

You should not place undue reliance on forward-looking statements. Known and unknown risks, uncertainties and other factors may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by forward- looking statements. Those factors may affect our operations, markets, products, services and prices. In addition to any assumptions and other factors referred to specifically in connection with the forward-looking statements, factors that could cause our actual results to differ materially from those contemplated in any forward-looking statement include, among others, the following:

     *  the effects of weather and other natural phenomena on our operations,
        demand for our services and energy prices;
     *  competition from other United States and Canadian energy suppliers and
        transporters as well as alternative forms of energy;
     *  the timing and extent of changes in commodity prices for natural gas,
        NGLs, electricity and crude oil;
     *  impact on drilling and production by factors beyond our control,
        including the demand for natural gas and refinery-grade crude oil;
        producers' desire and ability to obtain necessary permits; reserve
        performance; and capacity constraints on the pipelines that transport
        crude oil, natural gas and NGLs from producing areas and our
        facilities;
     *  risks of trading and hedging activities as a result of changes in
        energy prices or the financial condition of our counterparties;
     *  the timely receipt of approval by applicable governmental entities for
        construction and operation of our pipeline and other projects and
        required regulatory clearances;
     *  our ability to acquire all necessary rights-of-way permits and
        consents in a timely manner, to promptly obtain all necessary
        materials and supplies required for construction, and to construct
        pipelines without labor or contractor problems;
     *  the ability to market pipeline capacity on favorable terms;
     *  risks associated with adequate supply to our gathering, processing,
        fractionation and pipeline facilities, including production declines
        which outpace new drilling;
     *  the mechanical integrity of facilities operated;
     *  the effects of changes in governmental policies and regulatory
        actions, including changes with respect to income taxes, environmental
        compliance, authorized rates or recovery of gas costs;
     *  the results of administrative proceedings and litigation, regulatory
        actions and receipt of expected clearances involving regulatory
        authorities or any other local, state or federal regulatory body,
        including the FERC;
     *  actions by rating agencies concerning our credit ratings;
     *  the impact of unforeseen changes in interest rates, equity markets,
        inflation rates, economic recession and other external factors over
        which we have no control;
     *  our ability to access capital at competitive rates or on terms
        acceptable to us;
     *  demand for our services in the proximity of our facilities;
     *  the profitability of assets or businesses acquired by us;
     *  the risk that material weaknesses or significant deficiencies in our
        internal control over financial reporting could emerge or that minor
        problems could become significant;
     *  the impact and outcome of pending and future litigation;
     *  our ability to successfully integrate the operations of the assets
        acquired from ONEOK with our current operations;
     *  our ability to successfully transfer administrative functions of our
        interstate pipelines segment from Omaha to Tulsa;
     *  performance of contractual obligations by our customers;
     *  the uncertainty of estimates, including accruals;
     *  our ability to control operating costs; and
     *  acts of nature, sabotage, terrorism or other similar acts that cause
        damage to our facilities or our suppliers' or shippers' facilities.

These factors are not necessarily all of the important factors that could cause actual results to differ materially from those expressed in any of our forward-looking statements. Other factors could also have material adverse effects on our future results. These and other risks are described in greater detail in Item 1A, Risk Factors, in the company's Annual Report on Form 10-K. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors. Other than as required under securities laws, we undertake no obligation to update publicly any forward-looking statement whether as a result of new information, subsequent events or change in circumstances, expectations or otherwise.

    ONEOK Partners, L.P. and Subsidiaries
    CONSOLIDATED STATEMENTS OF INCOME

                                      Quarters Ended         Years Ended
                                       December 31,          December 31,
    (Unaudited)                     2006        2005        2006        2005
                               (Thousands of dollars, except per unit amounts)
    Revenues
    Operating revenue            $1,170,263   $185,741   $4,714,026  $678,560
    Cost of sales and fuel          953,249     57,421    3,872,869   180,052
    Net Margin                      217,014    128,320      841,157   498,508
    Operating Expenses
      Operations and maintenance     90,185     31,082      291,816   117,155
      Depreciation and amortization  27,776     22,761      122,045    86,010
      Taxes other than income         8,548      9,559       31,568    38,575
    Total Operating Expenses        126,509     63,402      445,429   241,740
      Gain on Sale of Assets            ---        ---      114,865       ---
    Operating Income                 90,505     64,918      510,593   256,768
      Interest expense, net          33,591     22,269      133,482    86,903
    Other income (expense)
      Equity earnings from
       investments                   23,133      5,460       95,883    24,736
      Other income                    3,646      1,074        9,850     4,079
      Other expense                  (1,405)      (513)      (7,597)     (707)
      Total Other Income, net        25,374      6,021       98,136    28,108
    Minority interests in net income    119     11,003        2,392    45,674
    Income from Continuing Operations
     before income taxes             82,169     37,667      472,855   152,299
    Income taxes                      1,907      2,009       27,669     5,792
    Income from Continuing
     Operations                      80,262     35,658      445,186   146,507
    Discontinued operations,
     net of tax                         ---        236          ---       506
    Net Income                      $80,262    $35,894     $445,186  $147,013

    Limited partners' interest
     in net income:
    Net income                      $80,262    $35,894     $445,186  $147,013
    General partners' interest
     in net income                   12,173      2,708       75,654    10,900
      Limited Partners' Interest
       in Net Income                $68,089    $33,186     $369,532  $136,113

    Limited partners' per unit
     net income:
    Income from continuing
     operations                       $0.82      $0.72        $5.01     $2.92
    Discontinued operations,
     net of tax                         ---        ---          ---      0.01
      Net income per unit             $0.82      $0.72        $5.01     $2.93
    Number of Units Used in
     Computation (Thousands)         82,891     46,397       73,768    46,397

    Supplemental Information:
    EBITDA (1)                     $141,961    $93,962     $728,569  $371,971
    Distributable cash flow (2)     $89,603    $41,854     $369,043  $183,069
    Distributable cash flow
     per unit                         $0.93      $0.84        $4.49     $3.71


     (1) EBITDA is computed from net income plus minority interest, interest
         expense (net), income taxes, and depreciation and amortization; less
         equity AFUDC.
     (2) Distributable cash flow is computed from EBITDA less interest expense
         (net), maintenance capital expenditures, equity earnings, gain on
         sale of assets, distributions to minority interests and current
         income taxes; plus distributions received from equity investments.



    ONEOK Partners, L.P. and Subsidiaries
    CONSOLIDATED BALANCE SHEETS
                                                December 31,      December 31,
    (Unaudited)                                    2006              2005
    Assets                                           (Thousands of dollars)
    Current Assets
      Cash and cash equivalents                    $21,102           $43,090
      Accounts receivable, net                     298,602            81,451
      Related party receivables                     88,572             1,397
      Gas and natural gas liquids in storage       198,141               ---
      Commodity exchanges                          167,072               ---
      Materials and supplies                        13,113             7,273
      Derivative financial instruments               2,154               ---
      Prepaid expenses and other                    18,121             5,211
        Total Current Assets                       806,877           138,422
    Property, Plant and Equipment
      Property, plant and equipment              3,424,452         3,000,720
      Accumulated depreciation and amortization    660,804         1,082,210
        Net Property, Plant and Equipment        2,763,648         1,918,510
    Investments and Other Assets
      Investment in unconsolidated affiliates      748,879           290,756
      Goodwill and intangibles                     689,751           152,782
      Other                                         26,201            27,296
        Total Investments and Other Assets       1,464,831           470,834
        Total Assets                            $5,035,356        $2,527,766

    Liabilities and Partners' Equity
    Current Liabilities
      Current maturities of long-term debt         $11,931            $2,194
      Notes payable                                  6,000           231,000
      Accounts payable                             361,967            39,593
      Related party payables                        25,737             7,080
      Commodity exchanges and imbalances           289,566               ---
      Accrued taxes other than income               17,918            33,081
      Accrued interest                              29,366            17,446
      Derivative financial instruments               3,875             4,571
      Other                                         38,312             7,033
        Total Current Liabilities                  784,672           341,998
    Long-term Debt, net of current maturities    2,019,598         1,121,777
    Minority Interests in Consolidated
     Subsidiaries                                    5,606           274,510
    Deferred Credits and Other Liabilities
      Deferred income taxes                            ---            10,311
      Derivative financial instruments               3,216             2,362
      Other liabilities                             33,602            11,219
        Total Reserves and Deferred Credits         36,818            23,892
    Commitments and Contingencies
    Partners' Equity
      General partners                              54,373            17,341
      Common units: 46,397,214 units issued
       and outstanding at December 31, 2006,
       and 2005                                    803,599           750,201
      Class B units: 36,494,126 units issued
       and outstanding at December 31, 2006      1,332,276               ---
    Accumulated other comprehensive loss            (1,586)           (1,953)
    Total Partners' Equity                       2,188,662           765,589
        Total Liabilities and
         Partners' Equity                       $5,035,356        $2,527,766



    ONEOK Partners, L.P. and Subsidiaries
    CONSOLIDATED STATEMENTS OF CASH FLOWS                 Years Ended
                                                           December 31,
    (Unaudited)                                       2006             2005
                                                      (Thousands of Dollars)
    Operating Activities
    Net income                                     $445,186         $147,013
    Depreciation and amortization                   122,045           86,361
    Minority interests in net income                  2,392           45,674
    Equity earnings from investments                (95,883)         (24,736)
    Distributions received from investments         123,427           16,440
    Gain on sale of assets                         (114,865)             ---
    Changes in assets and liabilities
     (net of acquisition effects):
      Accounts receivable                            49,944          (12,840)
      Commodity exchange receivable                 (33,912)             ---
      Inventories                                     7,841           (2,583)
      Prepaid expenses and other                     18,964            1,403
      Accounts payable and other current
       liabilities                                    9,852           16,260
      Commodity exchange payable                     55,077              ---
      Accrued taxes other than income                (3,733)             518
      Accrued interest                               23,445              915
    Derivative financial instruments                 (5,580)            (106)
    Other                                             1,862           (6,947)
      Cash Provided by Operating Activities         606,062          267,372

    Investing Activities
    Investments in unconsolidated affiliates         (8,463)          (8,537)
    Acquisitions                                 (1,396,893)             ---
    Proceeds from sale of assets                    297,315              ---
    Capital expenditures for property,
     plant and equipment                           (201,746)         (59,882)
    Increase in cash and cash equivalents
     for previously unconsolidated subsidiaries       7,496              ---
    Decrease in cash and cash equivalents
     for previously consolidated subsidiaries       (22,039)             ---
      Cash Used in Investing Activities          (1,324,330)         (68,419)

    Financing Activities
    Cash distributions:
      General and limited partners                 (265,479)        (159,624)
      Minority interests                               (343)         (60,870)
    Cash flow retained by ONEOK                    (177,486)             ---
    Increases in short-term notes payable         1,533,500          165,000
    Decreases in short-term notes payable        (1,734,000)        (125,000)
    Equity contributions from minority
     interests                                          ---              ---
    Issuance of partnership interests, net              ---              ---
    Debt reacquisition costs                         (3,628)             ---
    Issuance of long-term debt                    1,397,327              ---
    Long-term debt financing costs                  (12,003)          (1,382)
    Retirement of long-term debt                    (40,978)          (5,182)
    Payments upon termination of derivatives            ---           (2,785)
    Other                                              (630)             ---
      Cash Provided by (Used in) Financing
       Activities                                   696,280         (189,843)
        Change in Cash and Cash Equivalents         (21,988)           9,110
        Cash and Cash Equivalents at Beginning
         of Period                                   43,090           33,980
        Cash and Cash Equivalents at End of Period  $21,102          $43,090

    Supplemental Cash Flow Information:
      Cash Paid for interest, net of amount
       capitalized                                  $86,290          $91,168



    ONEOK Partners, L.P. and Subsidiaries
    RECONCILIATION OF EBITDA NON-GAAP FINANCIAL MEASURES

                                           Quarters Ended       Years Ended
                                            December 31,        December 31,
    (Unaudited)                            2006     2005      2006      2005
                                                 (Thousands of dollars)
    Reconciliation of Net Income to
     EBITDA
    Net income                           $80,262  $35,894  $445,186  $147,013
    Minority interests                       119   11,003     2,392    45,674
    Interest expense, net                 33,591   22,269   133,482    86,903
    Depreciation and amortization         27,776   23,059   122,045    86,361
    Income taxes                           1,907    1,995    27,669     6,547
    AFUDC                                 (1,694)    (258)   (2,205)     (527)
      EBITDA                            $141,961  $93,962  $728,569  $371,971

    Gathering and Processing
     Reconciliation of Operating Income
     to EBITDA
    Operating income                     $31,205  $12,130  $180,242   $44,714
    Depreciation and amortization         11,445    4,230    43,032    16,045
    Equity earnings from investments       6,176    4,408    22,616    22,473
    Other income (expense)                   178      114     3,246       608
      EBITDA                             $49,004  $20,882  $249,136   $83,840

    Natural Gas Liquids Reconciliation
     of Operating Income to EBITDA
    Operating income                     $24,102     $---   $88,691      $---
    Depreciation and amortization          4,604      ---    20,741       ---
    Equity earnings from investments         184      ---       432       ---
    Other income (expense)                   150      ---       284       ---
      EBITDA                             $29,040     $---  $110,148      $---

    Pipelines and Storage
     Reconciliation of Operating Income
     to EBITDA
    Operating income                     $26,708     $---  $107,919      $---
    Depreciation and amortization          7,592      ---    30,339       ---
    Equity earnings from investments          71      ---       442       ---
    Other income (expense)                   209      ---       414       ---
      EBITDA                             $34,580     $---  $139,114      $---

    Interstate Natural Gas Pipelines
     Reconciliation of Operating Income
     to EBITDA
    Operating income                     $10,286  $53,468  $158,505  $214,168
    Depreciation and amortization          3,550   17,299    14,534    67,608
    Equity earnings from investments      16,702    1,051    72,393     2,263
    Other income (expense)                    35       75       135     1,832
      EBITDA                             $30,573  $71,893  $245,567  $285,871



    ONEOK Partners, L.P. and Subsidiaries
    RECONCILIATION OF DISTRIBUTABLE CASH FLOW NON-GAAP FINANCIAL MEASURES

                                           Quarters Ended       Years Ended
                                            December 31,        December 31,
    (Unaudited)                             2006     2005      2006      2005
                               (Thousands of dollars, except per unit amounts)

    Reconciliation of EBITDA to
     Distributable Cash Flow
    EBITDA                              $141,961  $93,962  $728,569  $371,971
    Gain on sale of assets                   ---      ---  (114,865)      ---
    Interest expense, net                (33,591) (22,269) (133,482)  (86,903)
    Maintenance capital                  (26,246) (10,487)  (67,005)  (29,411)
    Distributions to minority interest         8  (17,095)     (343)  (60,870)
    Equity earnings from investments     (23,133)  (5,460)  (95,883)  (24,736)
    Distributions received from
     investments                          30,218    4,353   123,427    16,440
    Distributable cash flow to ONEOK
     for partial year ownership              ---      ---   (85,817)      ---
    Current income tax expense and
     other                                   386   (1,150)   14,442    (3,422)
      Distributable Cash Flow            $89,603  $41,854  $369,043  $183,069

    General Partners' Interest in
     Distributable Cash Flow             (12,441)  (2,788)  (38,034)  (11,152)
    Distributable Cash Flow to Limited
     Partners                            $77,162  $39,066  $331,009  $171,917

    Distributable Cash Flow per Limited
     Partner Unit                          $0.93    $0.84     $4.49     $3.71

    Average Units Outstanding             82,891   46,397    73,768    46,397



    ONEOK Partners, L.P. and Subsidiaries
    INFORMATION AT A GLANCE
                                            Quarters Ended     Years Ended
                                             December 31,      December 31,
    (Unaudited)                              2006    2005     2006     2005
                                (Millions of dollars, except per unit amounts)

    Gathering and Processing (a)
    Net margin                              $92.7   $25.7   $370.7    $95.2
    Depreciation and amortization           $11.4    $4.2    $43.0    $16.0
    Operating income                        $31.2   $12.1   $180.2    $44.7
    Total gas gathered (BBtu/d)             1,182     268    1,168      274
    Total gas processed (BBtu/d)            1,010      94      988       94
    Natural gas liquids sales (MBbl/d)         43       9       42        8
    Natural gas liquids produced (MBbl/d)      52       9       52        8
    Natural gas sales (BBtu/d)                288      42      302       43
    Realized composite NGL sales price
     ($/gallon)                             $0.87   $1.11    $0.93    $0.92
    Realized condensate sales price
     ($/Bbl)                               $60.79    $---   $57.84     $---
    Realized natural gas sales price
     ($/MMBtu)                              $5.83   $9.36    $6.31    $6.87
    Realized gross processing spread
     ($/MMBtu)                              $4.51    $---    $5.05     $---
    Capital expenditures -- growth          $33.7    $3.4    $59.4    $14.3
    Capital expenditures -- maintenance     $11.0    $0.8    $21.6     $2.3
    Natural Gas Liquids (b)
    Net margin                              $44.8     ---   $167.0      ---
    Depreciation and amortization            $4.6     ---    $20.7      ---
    Operating income                        $24.1     ---    $88.7      ---
    Natural gas liquids gathered (MBbl/d)     211     ---      206      ---
    Natural gas liquids sales (MBbl/d)        222     ---      207      ---
    Natural gas liquids fractionated
     (MBbl/d)                                 314     ---      313      ---
    Capital expenditures -- growth           $4.8     ---     $7.0      ---
    Capital expenditures -- maintenance      $2.5     ---    $14.7      ---
    Pipelines and Storage (b)
    Net margin                              $54.4     ---   $210.1      ---
    Depreciation and amortization            $7.6     ---    $30.3      ---
    Operating income                        $26.7     ---   $107.9      ---
    Natural gas transported (MMcf/d)        1,343     ---    1,348      ---
    Natural gas liquids transported
     (MBbl/d)                                 201     ---      200      ---
    Natural gas liquids gathered (MBbl/d)      66     ---       60      ---
    Capital expenditures -- growth          $13.3     ---    $44.5      ---
    Capital expenditures -- maintenance      $8.0     ---    $17.5      ---
    Average natural gas price
      Mid-continent region ($/MMBtu)        $5.60     ---    $6.04      ---

    Interstate Natural Gas Pipelines (c)
    Net margin                              $23.5   $96.3    $94.7   $378.7
    Depreciation and amortization            $3.5   $17.2    $14.5    $67.2
    Operating income                        $10.3   $53.5   $158.5   $214.2
    Natural gas delivered (MMcf/d)            831   2,949      868    2,974
    Natural gas average throughput
     (MMcf/d)                                 842   3,016      878    3,049
    Capital expenditures -- growth           $9.0    $8.1    $23.8    $16.2
    Capital expenditures -- maintenance      $4.6    $8.9    $12.1    $23.4
    (a) 2005 results include only our legacy operations.
    (b) The acquisition of these assets was completed in April 2006.
    (c) 2005 results include Northern Border Pipeline Company which was
        deconsolidated as of January 1, 2006.


     Analyst Contact:  Dan Harrison
                       918-588-7950
     Media Contact:    Megan Washbourne
                       918-588-7572
OKS-FE


SOURCE ONEOK Partners, L.P.

analysts, Dan Harrison, +1-918-588-7950, or media, Megan Washbourne, +1-918-588-7572,
both of ONEOK Partners, L.P.
http://www.oneok.com