e10vq
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
(Mark One)
     
þ   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2009
OR
     
o   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from                      to                     
Commission file number 1-32599
WILLIAMS PARTNERS L.P.
(Exact Name of Registrant as Specified in Its Charter)
     
DELAWARE   20-2485124
     
(State or Other Jurisdiction of Incorporation or Organization)   (I.R.S. Employer Identification No.)
     
ONE WILLIAMS CENTER    
TULSA, OKLAHOMA   74172-0172
     
(Address of Principal Executive Offices)   (Zip Code)
(918) 573-2000
(Registrant’s Telephone Number, Including Area Code)
NO CHANGE
(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report)
     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 þ No o
     Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or such shorter period that the registrant was required to submit and post such files). Yes o No o
     Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):
             
Large accelerated filer þ   Accelerated filer o  Non-accelerated filer o  Smaller reporting company o
        (Do not check if a smaller reporting company)    
     Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ
     The registrant had 52,777,452 common units outstanding as of October 28, 2009.
 
 

 


 

WILLIAMS PARTNERS L.P.
INDEX
         
    Page  
       
       
    5  
    6  
    7  
    8  
    9  
    21  
    39  
    40  
    41  
    41  
    41  
    43  
 EX-31.1
 EX-31.2
 EX-32

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FORWARD-LOOKING STATEMENTS
     Certain matters contained in this report include “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements relate to anticipated financial performance, management’s plans and objectives for future operations, business prospects, outcome of regulatory proceedings, market conditions and other matters. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995.
     All statements, other than statements of historical facts, included in this report which address activities, events or developments that we expect, believe or anticipate will exist or may occur in the future, are forward-looking statements. Forward-looking statements can be identified by various forms of words such as “anticipates,” “believes,” “could,” “may,” “should,” “continues,” “estimates,” “expects,” “forecasts,” “intends,” “might,” “objectives,” “planned,” “potential,” “projects,” “scheduled,” “will,” or other similar expressions. These forward-looking statements are based on management’s beliefs and assumptions and on information currently available to management and include, among others, statements regarding:
    Amounts and nature of future capital expenditures;
    Expansion and growth of our business and operations;
    Financial condition and liquidity;
    Business strategy;
    Cash flow from operations and results of operations;
    The levels of cash distributions to unitholders;
    Seasonality of certain business segments; and
    Natural gas and natural gas liquids prices and demand.
     Forward-looking statements are based on numerous assumptions, uncertainties and risks that could cause future events or results to be materially different from those stated or implied in this report. Limited partner interests are inherently different from the capital stock of a corporation, although many of the business risks to which we are subject are similar to those that would be faced by a corporation engaged in a similar business. The reader should carefully consider the risk factors discussed below in addition to the other information in this report. If any of the following risks were actually to occur, our business, results of operations and financial condition could be materially adversely affected. In that case, we might not be able to pay distributions on our common units, the trading price of our common units could decline and unitholders could lose all or part of their investment. Many of the factors that could adversely affect our business, results of operations and financial condition are beyond our ability to control or predict. Specific factors that could cause actual results to differ from results contemplated by the forward-looking statements include, among others, the following:
    Whether we have sufficient cash from operations to enable us to maintain current levels of cash distributions or to pay the minimum quarterly distribution following establishment of cash reserves and payment of fees and expenses, including payments to our general partner;
    Availability of supplies (including the uncertainties inherent in assessing and estimating future natural gas reserves), market demand, volatility of prices, and the availability and cost of capital;
    Inflation, interest rates and general economic conditions (including the current economic slowdown and the disruption of global credit markets and the impact of these events on our customers and suppliers);
    The strength and financial resources of our competitors;
    Development of alternative energy sources;

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    The impact of operational and development hazards;
    Costs of, changes in, or the results of laws, government regulations (including proposed climate change legislation), environmental liabilities, litigation and rate proceedings;
    Changes in maintenance and construction costs;
    Changes in the current geopolitical situation;
    Our exposure to the credit risks of our customers;
    Risks related to strategy and financing, including restrictions stemming from our debt agreements, future changes in our credit ratings and the availability and cost of credit;
    Risks associated with future weather conditions;
    Acts of terrorism; and
    Additional risks described in our filings with the Securities and Exchange Commission (SEC).
     Given the uncertainties and risk factors that could cause our actual results to differ materially from those contained in any forward-looking statement, we caution investors not to unduly rely on our forward-looking statements. We disclaim any obligations to and do not intend to update the above list or to announce publicly the result of any revisions to any of the forward-looking statements to reflect future events or developments.
     In addition to causing our actual results to differ, the factors listed above and referred to below may cause our intentions to change from those statements of intention set forth in this report. Such changes in our intentions may also cause our results to differ. We may change our intentions, at any time and without notice, based upon changes in such factors, our assumptions, or otherwise.
     Because forward-looking statements involve risks and uncertainties, we caution that there are important factors, in addition to those listed above, that may cause actual results to differ materially from those contained in the forward-looking statements. For a detailed discussion of those factors, see Part I, Item 1A. “Risk Factors” in our annual report on Form 10-K for the year ended December 31, 2008, and Part II, Item 1A. “Risk Factors” of this quarterly report on Form 10-Q.

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PART I — FINANCIAL INFORMATION
Item 1.   Financial Statements
WILLIAMS PARTNERS L.P.
CONSOLIDATED STATEMENTS OF INCOME
(Dollars in thousands, except per-unit amounts)
(Unaudited)
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
Revenues:
                               
Product sales:
                               
Affiliate
  $ 48,977     $ 92,421     $ 112,735     $ 264,677  
Third-party
    3,285       6,430       10,754       20,392  
Gathering and processing:
                               
Affiliate
    10,990       9,480       32,426       28,117  
Third-party
    48,425       50,721       140,142       146,479  
Storage
    8,531       8,264       24,993       22,699  
Fractionation
    2,396       5,484       7,572       13,580  
Other
    2,549       2,913       8,326       8,376  
 
                       
Total revenues
    125,153       175,713       336,948       504,320  
Costs and expenses:
                               
Product cost and shrink replacement:
                               
Affiliate
    9,066       22,358       25,378       72,077  
Third-party
    20,937       35,391       45,325       103,779  
Operating and maintenance expense (excluding depreciation):
                               
Affiliate
    10,352       21,220       32,726       60,901  
Third-party
    27,232       29,257       87,145       83,192  
Depreciation, amortization and accretion
    11,288       11,735       33,636       33,963  
General and administrative expense:
                               
Affiliate
    11,551       10,620       35,017       32,881  
Third-party
    646       664       2,182       2,341  
Taxes other than income
    2,586       2,314       7,347       6,986  
Other income
    (5,019 )     (5,822 )     (3,358 )     (8,300 )
 
                       
Total costs and expenses
    88,639       127,737       265,398       387,820  
 
                       
Operating income
    36,514       47,976       71,550       116,500  
Equity earnings-Wamsutter
    23,642       20,801       57,938       79,475  
Discovery investment income
    11,058       8,244       16,021       30,435  
Interest expense
    (15,281 )     (16,437 )     (45,597 )     (50,793 )
Interest income
    14       249       75       667  
 
                       
Net income
  $ 55,947     $ 60,833     $ 99,987     $ 176,284  
 
                       
Allocation of net income:
                               
Net income
  $ 55,947     $ 60,833     $ 99,987     $ 176,284  
Allocation of net income to general partner
    921       7,985 (a)     412       21,777 (a)
 
                       
Allocation of net income to limited partners
  $ 55,026     $ 52,848 (a)   $ 99,575     $ 154,507 (a)
 
                       
Basic and diluted net income per limited partner common unit
  $ 1.04     $ 1.00 (a)   $ 1.88     $ 2.92 (a)
Weighted average number of common units outstanding
    52,777,452       52,775,912       52,777,452       52,775,126  
 
(a)   Retrospectively adjusted as discussed in Note 2.
See accompanying notes to consolidated financial statements.

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WILLIAMS PARTNERS L.P.
CONSOLIDATED BALANCE SHEETS
                 
    September 30,     December 31,  
    2009     2008  
    (Unaudited)          
    (In thousands)  
ASSETS
               
Current assets:
               
Cash and cash equivalents
  $ 101,859     $ 116,165  
Accounts receivable:
               
Trade
    16,364       16,279  
Affiliate
    20,349       11,652  
Other
    1,142       2,919  
Product imbalance
    3,458       6,344  
Prepaid expense
    7,602       4,102  
Other current assets
    3,060       3,642  
 
           
Total current assets
    153,834       161,103  
Investment in Wamsutter
    275,471       277,707  
Investment in Discovery Producer Services
    193,147       184,466  
Gross property, plant and equipment
    1,287,209       1,265,153  
Less accumulated depreciation
    (652,012 )     (624,633 )
 
           
Property, plant and equipment, net
    635,197       640,520  
Other noncurrent assets
    25,493       28,023  
 
           
Total assets
  $ 1,283,142     $ 1,291,819  
 
           
LIABILITIES AND PARTNERS’ CAPITAL
               
Current liabilities:
               
Accounts payable:
               
Trade
  $ 19,974     $ 22,348  
Affiliate
    12,520       11,122  
Product imbalance
    6,876       8,926  
Deferred revenue
    9,190       4,916  
Accrued interest
    10,580       18,705  
Other accrued liabilities
    9,580       6,172  
 
           
Total current liabilities
    68,720       72,189  
Long-term debt
    1,000,000       1,000,000  
Environmental remediation liabilities
    1,874       2,321  
Other noncurrent liabilities
    14,488       13,699  
Commitments and contingent liabilities (Note 9 )
               
Partners’ capital
    198,060       203,610  
 
           
Total liabilities and partners’ capital
  $ 1,283,142     $ 1,291,819  
 
           
See accompanying notes to consolidated financial statements.

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WILLIAMS PARTNERS L.P.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
                 
    Nine Months Ended  
    September 30,  
    2009     2008  
    (In thousands)  
OPERATING ACTIVITIES:
               
Net income
  $ 99,987     $ 176,284  
Adjustments to reconcile to cash provided by operating activities:
               
Depreciation, amortization and accretion
    33,636       33,963  
Gain on involuntary conversion
    (4,034 )     (9,276 )
Equity earnings of Wamsutter
    (57,938 )     (79,475 )
Equity earnings of Discovery Producer Services
    (11,834 )     (30,435 )
Distributions related to equity earnings of Wamsutter
    57,938       78,296  
Distributions related to equity earnings of Discovery Producer Services
    11,834       30,435  
Cash provided (used) by changes in assets and liabilities:
               
Accounts receivable
    (7,005 )     (24,871 )
Prepaid expense
    (3,500 )     (1,079 )
Other current assets
    1,150       9,504  
Accounts payable
    (976 )     (11,878 )
Product imbalance
    836       (1,173 )
Deferred revenue
    4,040       5,544  
Accrued liabilities
    (5,266 )     (8,544 )
Other, including changes in noncurrent assets and liabilities
    2,216       2,539  
 
           
Net cash provided by operating activities
    121,084       169,834  
 
           
INVESTING ACTIVITIES:
               
Capital expenditures
    (28,087 )     (37,694 )
Cumulative distributions in excess of equity earnings of Discovery Producer Services
    2,806       15,165  
Cumulative distributions in excess of equity earnings of Wamsutter
    3,384        
Insurance proceeds
    5,000       7,718  
Insurance proceeds related to affiliate accounts receivable
          4,483  
Proceeds from sale of property, plant and equipment
    162        
Contributions to Wamsutter
    (958 )     (2,059 )
Contributions to Discovery Producer Services
    (11,486 )     (437 )
 
           
Net cash used by investing activities
    (29,179 )     (12,824 )
 
           
FINANCING ACTIVITIES:
               
Distributions to unitholders and general partner
    (110,011 )     (113,765 )
Proceeds from sale of common units
          28,992  
Redemption of common units from general partner
          (28,992 )
Contributions per omnibus agreement
    3,800       2,328  
Other
          76  
 
           
Net cash used by financing activities
    (106,211 )     (111,361 )
 
           
Increase (decrease) in cash and cash equivalents
    (14,306 )     45,649  
Cash and cash equivalents at beginning of period
    116,165       36,197  
 
           
Cash and cash equivalents at end of period
  $ 101,859     $ 81,846  
 
           
See accompanying notes to consolidated financial statements.

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WILLIAMS PARTNERS L.P.
CONSOLIDATED STATEMENT OF PARTNERS’ CAPITAL
(In thousands)
(Unaudited)
                                 
                    Accumulated Other     Total  
            General     Comprehensive     Partners’  
    Common     Partner     Income     Capital  
Balance — January 1, 2009
  $ 1,619,954     $ (1,416,344 )   $     $ 203,610  
Net income
    92,303       7,684             99,987  
Other comprehensive income:
                               
Net unrealized gains on cash flow hedges
                469       469  
Net unrealized gains on cash flow hedges — Wamsutter
                214       214  
Reclassification of gains into earnings
                (5 )     (5 )
Reclassification of gains into earnings — Wamsutter
                (23 )     (23 )
 
                             
Total other comprehensive income
                            655  
 
                             
Total comprehensive income
                            100,642  
Cash distributions
    (100,539 )     (9,472 )           (110,011 )
Contributions pursuant to the omnibus agreement
          3,800             3,800  
Other
    19                   19  
 
                       
Balance — September 30, 2009
  $ 1,611,737     $ (1,414,332 )   $ 655     $ 198,060  
 
                       
See accompanying notes to consolidated financial statements.

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WILLIAMS PARTNERS L.P.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Unaudited)
Note 1. Organization and Basis of Presentation
     Unless the context clearly indicates otherwise, references in this report to “we,” “our,” “us” or like terms refer to Williams Partners L.P. and its subsidiaries. Unless the context clearly indicates otherwise, references to “we,” “our,” and “us” include the operations of Wamsutter LLC (Wamsutter) and Discovery Producer Services LLC (Discovery) in which we own interests accounted for as equity investments that are not consolidated in our financial statements. When we refer to Wamsutter or Discovery by name, we are referring exclusively to their businesses and operations.
     We are principally engaged in the business of gathering, transporting, processing and treating natural gas and fractionating and storing natural gas liquids (NGL). Operations of our businesses are located in the United States and are organized into three reporting segments: (1) Gathering and Processing — West, (2) Gathering and Processing — Gulf and (3) NGL Services. Our Gathering and Processing — West segment includes the Four Corners gathering and processing operations and our equity investment in Wamsutter. Our Gathering and Processing — Gulf segment includes the Carbonate Trend gathering pipeline and our 60% ownership interest in Discovery. Our NGL Services segment includes the Conway fractionation and storage operations.
     The accompanying interim consolidated financial statements do not include all the notes in our annual financial statements and, therefore, should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Form 8-K, filed October 28, 2009, for the year ended December 31, 2008. The accompanying consolidated financial statements include all normal recurring adjustments that, in the opinion of management, are necessary to present fairly our financial position at September 30, 2009, results of operations for the three and nine months ended September 30, 2009 and 2008 and cash flows for the nine months ended September 30, 2009 and 2008. We eliminated all intercompany transactions and reclassified certain amounts to conform to the current classifications. We have evaluated our disclosure of subsequent events through the time of filing this Form 10-Q with the Securities and Exchange Commission on October 29, 2009.
     The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Note 2. Recent Accounting Standards
     In August 2009, the Financial Accounting Standards Board issued Accounting Standards Update No. 2009-5, Fair Value Measurements and Disclosures Measuring Liabilities at Fair Value (Topic 820). This Update provides clarification that in circumstances in which a quoted price in an active market for the identical liability is not available, a reporting entity is required to measure fair value using one or more prescribed techniques. The amendments in this Update also clarify that when estimating the fair value of a liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the existence of a restriction that prevents the transfer of the liability. Additionally, this Update clarifies that both a quoted price in an active market for the identical liability at the measurement date and the quoted price for the identical liability when traded as an asset in an active market when no adjustments to the quoted price of the asset are required are Level 1 fair value measurements. The guidance provided in this Update is effective for the fourth quarter of 2009. Application of this Update is not expected to materially impact our Consolidated Financial Statements.
     In January 2009, we adopted new guidance regarding the application of the two-class method to calculate earnings per unit for Master Limited Partnerships, which states, among other things, that the calculation of earnings per unit should not reflect an allocation of undistributed earnings to the incentive distribution right (IDR) holders beyond amounts distributable to IDR holders under the terms of the partnership agreement. Previously, under generally accepted accounting principles, we calculated earnings per unit as if all the earnings for the period had been distributed, which resulted in an additional allocation of income to the general partner (the IDR holder) in quarterly periods where an assumed incentive distribution exceeded the actual incentive distribution. Following the adoption of this guidance, we no longer calculate assumed incentive distributions. The retrospective application of this guidance decreased the income allocated to the general partner and increased the income allocated to limited partners for the amount that any assumed incentive distribution exceeded the actual incentive distribution calculated during that period. Certain of our historical periods’ earnings per unit have been revised as a result of this change. Earnings per unit for the three and nine months ended September 30, 2008 increased from $0.82 per unit to $1.00 per unit and $2.40 per unit to $2.92 per unit, respectively. Adoption of this new standard only impacts the allocation of earnings for purposes of calculating our earnings per limited partner unit and has no

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impact on our results of operations, allocation of earnings to capital accounts, or distributions of available cash to unitholders and our general partner.
Note 3. Allocation of Net Income and Distributions
     The allocation of net income between our general partner and limited partners, as reflected in the Consolidated Statement of Partners’ Capital, for the three and nine months ended September 30, 2009 and 2008 is as follows (in thousands):
                                 
    Three months ended     Nine months ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
Allocation to general partner:
                               
Net income
  $ 55,947     $ 60,833     $ 99,987     $ 176,284  
Reimbursable general and administrative costs charged directly to general partner
    201       514       1,619       1,310  
 
                       
Income subject to 2% allocation of general partner interest
    56,148       61,347       101,606       177,594  
General partner’s share of net income
    2.0 %     2.0 %     2.0 %     2.0 %
 
                       
General partner’s allocated share of net income before items directly allocable to general partner interest
    1,122       1,227       2,031       3,552  
Incentive distributions paid to general partner*
          6,765       7,272       16,495  
Direct charges to general partner
    (201 )     (514 )     (1,619 )     (1,310 )
 
                       
Net income allocated to general partner*
  $ 921     $ 7,478     $ 7,684     $ 18,737  
 
                       
Net income
  $ 55,947     $ 60,833     $ 99,987     $ 176,284  
Net income allocated to general partner*
    921       7,478       7,684       18,737  
 
                       
Net income allocated to limited partners
  $ 55,026     $ 53,355     $ 92,303     $ 157,547  
 
                       
 
*   In the calculation of basic and diluted net income per limited partner unit, the net income allocated to the general partner includes IDRs pertaining to the current reporting period, but paid in the subsequent period. The net income allocated to the general partner’s capital account reflects IDRs paid during the current reporting period. In April 2009, The Williams Companies, Inc. (Williams) waived the IDRs related to 2009 distribution periods. The IDRs paid in February 2009 relate to the fourth-quarter 2008 distribution.
Prior to the conversion of the subordinated units into common units in 2008, common and subordinated unitholders always shared equally, on a per-unit basis, in the net income allocated to limited partners.
We paid or have authorized payment of the following cash distributions during 2008 and 2009 (in thousands, except for per unit amounts):
                                                 
                            General Partner    
                                    Incentive    
    Per Unit   Common   Subordinated           Distribution   Total Cash
Payment Date   Distribution   Units   Units   2%   Rights   Distribution
2/14/2008
  $ 0.5750     $ 26,321     $ 4,025     $ 706     $ 4,231     $ 35,283  
5/15/2008
  $ 0.6000     $ 31,665           $ 758     $ 5,498     $ 37,921  
8/14/2008
  $ 0.6250     $ 32,984           $ 811     $ 6,765     $ 40,560  
11/14/2008
  $ 0.6350     $ 33,513           $ 832     $ 7,272     $ 41,617  
2/13/2009
  $ 0.6350     $ 33,513           $ 832     $ 7,272     $ 41,617  
5/15/2009
  $ 0.6350     $ 33,513           $ 684     $     $ 34,197  
8/14/2009
  $ 0.6350     $ 33,513           $ 684     $     $ 34,197  
11/13/2009 (a)
  $ 0.6350     $ 33,513           $ 684     $     $ 34,197  
 
(a)   The board of directors of our general partner declared this cash distribution on October 27, 2009 to be paid on November 13, 2009 to unitholders of record at the close of business on November 6, 2009.

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Note 4. Related Party Transactions
     In 2009, our omnibus agreement with Williams was amended to increase the aggregate amount of the credit we can receive related to certain general and administrative expenses for 2009. Consequently, for 2009, Williams will provide up to an additional $10.0 million credit, in addition to the $0.8 million annual credit previously provided under the original omnibus agreement, to the extent that 2009 general and administrative expenses excluded from segment profit exceed $36.0 million. We will record total general and administrative expenses (including those expenses that are subject to the credit by Williams) as an expense, and we will record any credits as capital contributions from Williams. Accordingly, our net income will not reflect the benefit of the credit received from Williams. However, the costs subject to this credit will be allocated entirely to our general partner. As a result, the net income allocated to limited partners on a per-unit basis will reflect the benefit of this credit. For the nine months ended September 30, 2009, the total additional general and administrative credit received from Williams was $1.0 million. No additional general and administrative credit was received during the third quarter.
Note 5. Equity Investments
Wamsutter
     Wamsutter allocates net income (equity earnings) to us based upon the allocation, distribution, and liquidation provisions of its limited liability company agreement applied as though liquidation occurs at book value. In general, the agreement allocates income in a manner that will maintain capital account balances reflective of the amounts each membership interest would receive if Wamsutter were dissolved and liquidated at carrying value. The income allocation for the quarterly periods during a year reflects the preferential rights of the Class A member interest to any distributions made to the Class C member interest until the Class A member interest has received $70.0 million in distributions for the year. The Class B member receives no income or loss allocation. As the owner of 100% of the Class A membership interest, we will receive 100% of Wamsutter’s net income up to $70.0 million. Income in excess of $70.0 million will be shared between the Class A member and Class C member, of which we currently own 68%. For annual periods in which Wamsutter’s net income exceeds $70.0 million, this will result in a higher allocation of equity earnings to us early in the year and a lower allocation of equity earnings to us later in the year. Wamsutter’s net income allocation does not affect the amount of available cash it distributes for any quarter.
     The summarized financial position and results of operations for 100% of Wamsutter are presented below (in thousands):
                 
    September 30,     December 31,  
    2009     2008  
    (Unaudited)          
Current assets
  $ 22,686     $ 17,147  
Property, plant and equipment, net
    390,443       318,072  
Non-current assets
    820       468  
Current liabilities
    (24,835 )     (16,960 )
Non-current liabilities
    (4,524 )     (4,353 )
 
           
Members’ capital
  $ 384,590     $ 314,374  
 
           
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
            (Unaudited)          
Revenues:
                               
Product sales:
                               
Affiliate
  $ 29,666     $ 31,152     $ 66,255     $ 117,070  
Third-party
    1,993       7,612       10,542       21,498  
Gathering and processing services
    19,758       17,150       59,806       50,495  
Other revenues
    935       1,906       4,157       6,604  
Costs and expenses excluding depreciation and accretion:
                               
Affiliate
    9,487       11,031       33,108       61,510  
Third-party
    13,539       9,487       33,027       27,740  
Depreciation and accretion
    5,684       5,295       16,687       15,736  
 
                       
Net income
  $ 23,642     $ 32,007     $ 57,938     $ 90,681  
 
                       
 
                               
Williams Partners’ interest — equity earnings
  $ 23,642     $ 20,801     $ 57,938     $ 79,475  
 
                       

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Discovery Producer Services LLC
     The summarized financial position and results of operations for 100% of Discovery are presented below (in thousands):
                 
    September 30,     December 31,  
    2009     2008  
    (Unaudited)          
Current assets
  $ 53,467     $ 50,978  
Non-current restricted cash and cash equivalents
          3,470  
Property, plant and equipment, net
    367,448       370,482  
Current liabilities
    (25,409 )     (45,234 )
Non-current liabilities
    (22,924 )     (19,771 )
 
           
Members’ capital
  $ 372,582     $ 359,925  
 
           
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
            (Unaudited)          
Revenues:
                               
Affiliate
  $ 36,030     $ 53,037     $ 75,121     $ 202,954  
Third-party
    14,016       8,243       33,646       28,365  
Costs and expenses:
                               
Affiliate
    8,675       17,249       27,559       87,717  
Third-party
    22,946       30,224       61,343       93,403  
Interest income
    (5 )     (143 )     (27 )     (593 )
Other expense
          208       168       67  
 
                       
Net income
  $ 18,430     $ 13,742     $ 19,724     $ 50,725  
 
                       
Discovery investment income:
                               
Williams Partners’ interest — equity earnings
  $ 11,058     $ 8,244     $ 11,834     $ 30,435  
Business interruption insurance proceeds
                4,187        
 
                       
Discovery investment income
  $ 11,058     $ 8,244     $ 16,021     $ 30,435  
 
                       
     In the second quarter of 2009, Discovery’s limited liability company agreement was amended to calculate available cash based on cash on hand at the end of the month preceding the end of each calendar quarter (e.g. May 31 for the second quarter) and to require distribution of available cash by the end of each calendar quarter. Prior to this amendment, Discovery calculated available cash based on cash on hand at the end of each calendar quarter and made the related distribution within 30 days of the end of each calendar quarter. The change in distribution timing will result in an extra distribution in 2009 to us from Discovery.
Note 6. Long-Term Debt and Credit Facilities
Long-Term Debt
     Long-term debt at September 30, 2009 and December 31, 2008 is as follows:
                         
    Interest     September 30,     December 31,  
    Rate     2009     2008  
            (In millions)          
Credit agreement term loan, adjustable rate, due 2012
    (a )   $ 250     $ 250  
Senior unsecured notes, fixed rate, due 2017
    7.25 %     600       600  
Senior unsecured notes, fixed rate, due 2011
    7.50 %     150       150  
 
                   
Total Long-term debt
          $ 1,000     $ 1,000  
 
                   
 
(a)   1.25% at September 30, 2009.
     Credit Facilities
     We have a $450.0 million senior unsecured credit agreement (Credit Agreement) with Citibank, N.A. as administrative agent, comprised initially of a $200.0 million revolving credit facility available for borrowings and letters of credit and a $250.0 million term loan. The parent company and certain affiliates of Lehman Brothers Commercial Bank, who is committed to fund up to $12.0 million

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of this credit facility, filed for bankruptcy in September 2008. We expect that our ability to borrow under this facility is reduced by this committed amount. The committed amounts of the other participating banks remain in effect and are not impacted by this reduction. However, debt covenants may restrict the full use of the credit facility. We must repay borrowings under the Credit Agreement by December 11, 2012. At September 30, 2009, we had a $250.0 million term loan outstanding under the term loan provisions and no amounts outstanding under the revolving credit facility. As a result of the second-quarter 2009 Fitch Ratings downgrade of our senior unsecured debt rating from BB+ to BB, our applicable margin on the $250.0 million term loan increased 0.25% to 1.0% and the commitment fee on the unused capacity of our revolver increased 0.05% to 0.175%.
     The Credit Agreement contains various covenants that limit, among other things, our, and certain of our subsidiaries’, ability to incur indebtedness, grant certain liens supporting indebtedness, merge, consolidate, sell all or substantially all of our assets or make distributions or other payments other than distributions of available cash under certain conditions. Significant financial covenants under the Credit Agreement, including certain ratios calculated on a rolling four-quarter basis, include the following:
    We are required to maintain a ratio of consolidated indebtedness to consolidated EBITDA (each as defined in the Credit Agreement) of no greater than 5.00 to 1.00 as of the last day of any fiscal quarter. This ratio may be increased in the case of an acquisition of $50.0 million or more, in which case the ratio will be 5.50 to 1.00 for the fiscal quarter in which the acquisition occurs and three fiscal quarter-periods following such acquisition. At September 30, 2009, our ratio of consolidated indebtedness to consolidated EBITDA, as calculated under this covenant, of approximately 3.92 is in compliance with this covenant.
    Our ratio of consolidated EBITDA to consolidated interest expense (each as defined in the Credit Agreement) must be not less than 2.75 to 1.00 as of the last day of any fiscal quarter, unless we obtain an investment grade rating from Standard and Poor’s Ratings Services or Moody’s Investors Service and the rating from the other agency is not less than Ba1 or BB+, as applicable. At September 30, 2009, our ratio of consolidated EBITDA to consolidated interest expense, as calculated under this covenant, of approximately 4.24 is in compliance with this covenant.
     In the event that, despite our efforts, we breach our financial covenants causing an event of default, the lenders could, among other things, accelerate the maturity of any borrowings under the facility (including our $250.0 million term loan) and terminate their commitments to lend. There are no cross-default provisions in the indentures governing our senior unsecured notes; therefore, a default under the Credit Agreement would not cause a cross default under the indentures governing the senior unsecured notes.
     We also have a $20.0 million revolving credit facility with Williams as the lender. The facility is available exclusively to fund working capital requirements. Borrowings under the credit facility mature June 20, 2010 with four one-year automatic extensions unless terminated by either party. We are required to and have reduced all borrowings under this facility to zero for a period of at least 15 consecutive days once each 12-month period prior to the maturity date of the facility. We pay a commitment fee to Williams on the unused portion of the credit facility of 0.125% annually. Interest on borrowings under the facility will be calculated upon a periodic fixed rate equal to a base rate plus an applicable margin, or the Eurodollar rate plus an applicable margin. As of September 30, 2009, we had no outstanding borrowings under the working capital credit facility.
Note 7. Financial Instruments and Fair Value Measurements
Financial Instruments
     We used the following methods and assumptions to estimate the fair value of financial instruments.
     Cash and cash equivalents. The carrying amounts reported in the balance sheets approximate fair value due to the short-term maturity of these instruments.
     Long-term debt. The fair value of our publicly traded long-term debt is valued using indicative end-of-period traded bond market prices. We base the fair value of our private long-term debt on market rates and the prices of similar securities with similar terms and credit ratings. We consider our nonperformance risk in estimating fair value.
     Energy derivatives. We base the fair value of our swap agreements on prices of the underlying energy commodities over the contract life and contractual or notional volumes with the resulting expected future cash flows discounted to a present value using a risk-free market interest rate. Many contracts have bid and ask prices that can be observed in the market. Our policy is to use a mid-market price (the mid-point price between bid and ask prices) convention to value individual positions and then adjust on a portfolio

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level to a point within the bid and ask range that represents our best estimate of fair value. For offsetting positions by location, the mid-market price is used to measure both the long and short positions.
Carrying amounts and fair values of our financial instruments
                                 
    September 30, 2009   December 31, 2008
    Carrying   Fair   Carrying   Fair
Asset (Liability)   Amount   Value   Amount   Value
            (In thousands)        
Cash and cash equivalents
  $ 101,859     $ 101,859     $ 116,165     $ 116,165  
Long-term debt
    (1,000,000 )     (993,987 )     (1,000,000 )     (825,289 )
Energy derivative assets
    566       566              
Energy derivative liabilities
    (103 )     (103 )            
Fair Value Measurements
     Fair value is the amount received to sell an asset or the amount paid to transfer a liability in an orderly transaction between market participants (an exit price) at the measurement date. Fair value is a market-based measurement considered from the perspective of a market participant. We use market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation. These inputs can be readily observable, market corroborated, or unobservable. We primarily apply a market approach for recurring fair value measurements using the best available information while utilizing valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs.
     The fair value hierarchy prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). We classify fair value balances based on the observability of those inputs. The three levels of the fair value hierarchy are as follows:
    Level 1 — Quoted prices in active markets for identical assets or liabilities that we have the ability to access. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis.
    Level 2 — Inputs are other than quoted prices in active markets included in Level 1, that are either directly or indirectly observable. These inputs are either directly observable in the marketplace or indirectly observable through corroboration with market data for substantially the full contractual term of the asset or liability being measured.
    Level 3 — Includes inputs that are not observable for which there is little, if any, market activity for the asset or liability being measured. These inputs reflect management’s best estimate of the assumptions market participants would use in determining fair value. Our Level 3 consists of instruments valued with valuation methods that utilize unobservable pricing inputs that are significant to the overall fair value.
     In valuing certain contracts, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. For disclosure purposes, assets and liabilities are classified in their entirety in the fair value hierarchy level based on the lowest level of input that is significant to the overall fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement within the fair value hierarchy levels.
     The following table presents, by level within the fair value hierarchy, our assets and liabilities that are measured at fair value on a recurring basis.

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     Fair Value Measurements Using:
                                 
    September 30, 2009
    Level 1   Level 2   Level 3   Total
            (In thousands)        
Assets:
                               
Energy derivatives
  $   $ 536   $ 30   $ 566
Liabilities:
                               
Energy derivatives
  $   $ 8   $ 95   $ 103
     Energy derivatives include commodity-based contracts with Williams Gas Marketing, Inc. (WGM), a wholly-owned subsidiary of Williams, that resemble similar exchange-traded contracts and Over-the-Counter (OTC) contracts. Exchange-traded contracts could include futures, swaps and options. OTC contracts could include forwards, swaps and options.
      Contracts for which fair value can be estimated from executed transactions or broker quotes corroborated by other market data are generally classified within Level 2. These broker quotes are based on observable market prices at which transactions could currently be executed. In certain instances where these inputs are not observable for all periods, relationships of observable market data and historical observations are used as a means to estimate fair value. Where observable inputs are available for substantially the full term of the asset or liability, the instrument is categorized in Level 2. Our natural gas swaps are included in Level 2.
     Certain instruments trade in less active markets with lower availability of pricing information requiring valuation models using inputs that may not be readily observable or corroborated by other market data. These instruments are classified within Level 3 when these inputs have a significant impact on the measurement of fair value. Our commodity-based NGL financial swap contracts are included in Level 3.
     The determination of fair value for our assets and liabilities also incorporates the time value of money and various credit risk factors which can include the credit standing of the counterparties involved, master netting arrangements, the impact of credit enhancements (such as collateral posted and letters of credit), and our nonperformance risk on our liabilities.
     The following table sets forth a reconciliation of changes in the fair value of net derivatives classified as Level 3 in the fair value hierarchy for the three and nine months ended September 30, 2009 and 2008.
Level 3 Fair Value Measurements Using Significant Unobservable Inputs
Three and Nine Months Ended September 30, 2009 and 2008
(In thousands)
                                 
    Net Derivative Asset (Liability)  
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
Beginning balance
  $ (3 )   $ (11,978 )   $     $ (2,487 )
Realized and unrealized gains (losses):
                               
Included in net income
    121       (5,095 )     42       (6,711 )
Included in other comprehensive income
    (141 )     15,253       (65 )     6,139  
Purchases, issuances, and settlements
    (42 )     5,458       (42 )     6,697  
Transfers in/(out) of Level 3
                       
 
                       
Ending balance
  $ (65 )   $ 3,638     $ (65 )   $ 3,638  
 
                       
Unrealized gains (losses) included in net income relating to instruments still held at September 30
  $     $ 164     $     $ (14 )
 
                       
     Realized and unrealized gains (losses) included in net income are reported in revenues in our Consolidated Statements of Income.
Note 8. Energy Commodity Derivatives
Risk Management Activities
     We are exposed to market risk from changes in energy commodity prices within our operations. Our Four Corners operation receives NGLs as compensation for certain processing services and purchases natural gas to satisfy the required fuel and shrink replacement needed to extract these NGLs. To reduce exposure to a decrease in revenues from fluctuations in NGL market prices or increases in costs and operating expenses from fluctuations in natural gas market prices, we may enter into NGL or natural gas swap agreements, financial or physical forward contracts, and financial option contracts to mitigate these commodity price risks.
     All of these derivatives utilized for risk management purposes have been designated as cash flow hedges. Our cash flow hedges are expected to be highly effective in offsetting cash flows attributable to the hedged risk during the term of the hedge. However, ineffectiveness may be recognized primarily as a result of location differences between the hedging derivative and the hedged item.

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Changes in the fair value of our cash flow hedges, to the extent effective, are deferred in other comprehensive income and are reclassified into earnings in the same period or periods in which the hedged forecasted purchases or sales affect earnings, or when it is probable that the hedged forecasted transaction will not occur by the end of the originally specified time period.
Volumes
     Our energy commodity derivatives are comprised of both contracts to purchase natural gas and contracts to sell NGLs at a fixed location price. The following table depicts the notional volumes in our commodity derivatives portfolio as of September 30, 2009.
                 
    Period   Volumes
Designated as hedging instruments:
               
NGL sales — ethane (million gallons)
  October—December 2009     11.3  
NGL sales — normal butane (million gallons)
  October—December 2009     1.6  
NGL sales — isobutane (million gallons)
  October—December 2009     1.0  
NGL sales — natural gasoline (million gallons)
  October—December 2009     1.0  
 
               
Natural gas purchases (million British thermal units per day)
  October—December 2009     7,000  
Natural gas purchases (million British thermal units per day)
  November—December 2009     5,000  
Financial Statement Presentation
     The fair value of our energy commodity derivatives designated as hedging instruments is presented in our Consolidated Balance Sheet as Other current assets of $0.6 million and Other accrued liabilities of $0.1 million as of September 30, 2009. There are no derivatives recognized on the Consolidated Balance Sheet that have not been designated as hedging instruments. The fair value amounts are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements.
     The following table presents gains and losses for our energy commodity derivatives designated as cash flow hedges and recognized in accumulated other comprehensive income (AOCI) or revenues. There were no gains or losses recognized in income as a result of excluding amounts from the assessment of hedge effectiveness.
                     
    Three months   Nine months    
    ended   ended    
    September 30,   September 30,    
    2009   2009   Classification
    (In thousands)    
Net gain recognized in other comprehensive income (effective portion)
  $ 393     $ 469     AOCI
Net gain reclassified from accumulated other comprehensive income into income (effective portion)
  $ 5     $ 5     Revenues
Gain recognized in income (ineffective portion)
  $     $      
Other unrealized gain included in income
  $     $      
     Based on recorded values at September 30, 2009, $0.5 million of net gains will be reclassified into earnings within the next twelve months. These recorded values are based on market prices of the commodities as of September 30, 2009. Due to the volatile nature of commodity prices and changes in the creditworthiness of counterparties, actual gains or losses realized within the next twelve months will likely differ from these values. These gains or losses are expected to substantially offset net losses or gains that will be realized in earnings from previous unfavorable or favorable market movements for the volumes associated with the underlying hedged transactions.
Credit-Risk-Related Features
     Our NGL financial swap contracts and our natural gas purchase contracts are with WGM. These agreements do not contain any provisions that require us to post collateral related to net liability positions.

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Note 9. Commitments and Contingencies
     Environmental Matters-Four Corners. Current federal regulations require that certain unlined liquid containment pits located near named rivers and catchment areas be taken out of use, and current state regulations required all unlined, earthen pits to be either permitted or closed by December 31, 2005. Operating under a New Mexico Oil Conservation Division-approved work plan, we have physically closed all of our pits that were slated for closure under those regulations. We are presently awaiting agency approval of the closures for 40 to 50 of those pits. We are also a participant in certain hydrocarbon removal and groundwater monitoring activities associated with certain well sites in New Mexico. Of nine remaining active sites, product removal is ongoing at four and groundwater monitoring is ongoing at each site. As groundwater concentrations reach and sustain closure criteria levels and state regulator approval is received, the sites will be properly abandoned. We expect the remaining sites will be closed within four to seven years.
     In April 2007, the New Mexico Environment Department’s Air Quality Bureau (NMED) issued a notice of violation (NOV) that alleges various emission and reporting violations in connection with our Lybrook gas processing plant’s flare and leak detection and repair program. In December 2007, the NMED proposed a penalty of approximately $3 million. In July 2008, the NMED issued an NOV that alleged air emissions permit exceedances for three glycol dehydrators at one of our compressor facilities and proposed a penalty of approximately $103,000. We are discussing the proposed penalties with the NMED.
     In March 2008, the Environmental Protection Agency (EPA) proposed a penalty of $370,000 for alleged violations relating to leak detection and repair program delays at our Ignacio gas plant in Colorado and for alleged permit violations at a compressor station. We met with the EPA and are exchanging information in order to resolve the issues.
     We have accrued liabilities totaling $1.4 million at September 30, 2009 for these environmental activities. It is reasonably possible that we will incur losses in excess of our accrual for these matters. However, a reasonable estimate of such amounts cannot be determined at this time because actual costs incurred will depend on the actual number of contaminated sites identified, the amount and extent of contamination discovered, the final cleanup standards mandated by governmental authorities, negotiations with the applicable agencies, and other factors.
     Environmental Matters-Conway. We are a participant in certain environmental remediation activities associated with soil and groundwater contamination at our Conway storage facilities. These activities relate to four projects that are in various remediation stages including assessment studies, cleanups and/or remedial operations and monitoring. We continue to coordinate with the Kansas Department of Health and Environment (KDHE) to develop screening, sampling, cleanup and monitoring programs. The costs of such activities will depend upon the program scope ultimately agreed to by the KDHE and are expected to be paid over the next two to six years. At September 30, 2009, we had accrued liabilities totaling $3.1 million for these costs. It is reasonably possible that we will incur costs in excess of our accrual for these matters. However, a reasonable estimate of such amounts cannot be determined at this time because actual costs incurred will depend on the actual number of contaminated sites identified, the amount and extent of contamination discovered, the final cleanup standards mandated by KDHE and other governmental authorities and other factors.
     Under an omnibus agreement with Williams entered into at the closing of our initial public offering, Williams agreed to indemnify us for certain Conway environmental remediation costs. At September 30, 2009, approximately $7.0 million remains available for future indemnification. Payments received under this indemnification are accounted for as a capital contribution to us by Williams as the costs are reimbursed.
     Will Price. In 2001, we were named, along with other subsidiaries of Williams, as defendants in a nationwide class action lawsuit in Kansas state court that had been pending against other defendants, generally pipeline and gathering companies, since 2000. The plaintiffs alleged that the defendants have engaged in mismeasurement techniques that distort the heating content of natural gas, resulting in an alleged underpayment of royalties to the class of producer plaintiffs and sought an unspecified amount of damages. The defendants have opposed class certification, and on September 18, 2009, the court denied plaintiffs’ most recent motion to certify the class. On October 2, 2009, the plaintiffs filed a motion for reconsideration of the denial. We are awaiting a decision from the court. The amount of any possible liability cannot be reasonably estimated at this time.
     Grynberg. In 1998, the U.S. Department of Justice (DOJ) informed Williams that Jack Grynberg, an individual, had filed claims on behalf of himself and the federal government in the United States District Court for the District of Colorado under the False Claims Act against Williams, certain of its subsidiaries (including us) and approximately 300 other energy companies. The claims sought an unspecified amount of royalties allegedly not paid to the federal government, treble damages, a civil penalty, attorneys’ fees and costs. In 1999, the DOJ announced that it would not intervene in any of the Grynberg cases. Also in 1999, the Panel on Multi-District Litigation transferred all of these cases, including those filed against us, to the federal court in Wyoming for pre-trial purposes. The District Court dismissed all claims against Williams and its subsidiaries, including us. On March 17, 2009, the Tenth Circuit Court of Appeals affirmed the District Court’s dismissal. On October 5, 2009, the United States Supreme Court denied Grynberg’s petition for a writ of certiorari requesting review of the Tenth Circuit Court of Appeals ruling. This matter is concluded.

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     GEII Litigation. General Electric International, Inc. (GEII) worked on turbines at our Ignacio, New Mexico plant. We disagree with GEII on the quality of GEII’s work and the appropriate compensation. GEII asserts that it is entitled to additional extra work charges under the agreement, which we deny are due. In 2006 we filed suit in federal court in Tulsa, Oklahoma against GEII, GE Energy Services, Inc., and Qualified Contractors, Inc. We alleged, among other claims, breach of contract, breach of the duty of good faith and fair dealing, and negligent misrepresentation and sought unspecified damages. In 2007, the defendants and GEII filed counterclaims in the amount of $1.9 million against us that alleged breach of contract and breach of the duty of good faith and fair dealing. Trial has been set for January 2010.
     Other. We are not currently a party to any other legal proceedings but are a party to various administrative and regulatory proceedings that have arisen in the ordinary course of our business.
     Summary. Litigation, arbitration, regulatory matters and environmental matters are subject to inherent uncertainties. Were an unfavorable ruling to occur, there exists the possibility of a material adverse impact on the results of operations in the period in which the ruling occurs. Management, including internal counsel, currently believes that the ultimate resolution of the foregoing matters, taken as a whole and after consideration of amounts accrued, insurance coverage, recovery from customers or other indemnification arrangements, will not have a material adverse effect upon our future liquidity or financial position.

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Note 10. Segment Disclosures
     Our reportable segments are strategic business units that offer different products and services. We manage the segments separately because each segment requires different industry knowledge, technology and marketing strategies.
                                 
            Gathering &              
    Gathering &     Processing -     NGL        
    Processing - West     Gulf     Services     Total  
            (In thousands)          
Three Months Ended September 30, 2009:
                               
Segment revenues
  $ 109,843     $ 350     $ 14,960     $ 125,153  
Costs and expenses:
                               
Product cost and shrink replacement
    28,059             1,944       30,003  
Operating and maintenance expense
    32,189       124       5,271       37,584  
Depreciation, amortization and accretion
    10,375       33       880       11,288  
Direct general and administrative expense
    2,348             860       3,208  
Other, net
    (2,968 )     326       209       (2,433 )
 
                       
Segment operating income (loss)
    39,840       (133 )     5,796       45,503  
Investment income
    23,642       11,058             34,700  
 
                       
Segment profit
  $ 63,482     $ 10,925     $ 5,796     $ 80,203  
 
                       
Reconciliation to the Consolidated Statements of Income:
                               
Segment operating income
                          $ 45,503  
General and administrative expenses:
                               
Allocated-affiliate
                            (8,459 )
Third party-direct
                            (530 )
 
                             
Combined operating income
                          $ 36,514  
 
                             
Three Months Ended September 30, 2008:
                               
Segment revenues
  $ 155,217     $ 537     $ 19,959     $ 175,713  
Costs and expenses:
                               
Product cost and shrink replacement
    53,902             3,847       57,749  
Operating and maintenance expense
    42,129       148       8,200       50,477  
Depreciation, amortization and accretion
    10,811       153       771       11,735  
Direct general and administrative expense
    2,188             631       2,819  
Other, net
    (3,703 )           195       (3,508 )
 
                       
Segment operating income
    49,890       236       6,315       56,441  
Investment income
    20,801       8,244             29,045  
 
                       
Segment profit
  $ 70,691     $ 8,480     $ 6,315     $ 85,486  
 
                       
Reconciliation to the Consolidated Statements of Income:
                               
Segment operating income
                          $ 56,441  
General and administrative expenses:
                               
Allocated-affiliate
                            (7,908 )
Third party-direct
                            (557 )
 
                             
Combined operating income
                          $ 47,976  
 
                             

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            Gathering &              
    Gathering &     Processing -     NGL        
    Processing - West     Gulf     Services     Total  
            (In thousands)          
Nine Months Ended September 30, 2009:
                               
Segment revenues
  $ 292,285     $ 1,295     $ 43,368     $ 336,948  
Costs and expenses:
                               
Product cost and shrink replacement
    65,574             5,129       70,703  
Operating and maintenance expense
    101,166       1,274       17,431       119,871  
Depreciation, amortization and accretion
    30,997       125       2,514       33,636  
Direct general and administrative expense
    6,809             2,380       9,189  
Other, net
    3,035       326       628       3,989  
 
                       
Segment operating income (loss)
    84,704       (430 )     15,286       99,560  
Investment income
    57,938       16,021             73,959  
 
                       
Segment profit
  $ 142,642     $ 15,591     $ 15,286     $ 173,519  
 
                       
Reconciliation to the Consolidated Statements of Income:
                               
Segment operating income
                          $ 99,560  
General and administrative expenses:
                               
Allocated-affiliate
                            (26,276 )
Third party-direct
                            (1,734 )
 
                             
Combined operating income
                          $ 71,550  
 
                             
Nine Months Ended September 30, 2008:
                               
Segment revenues
  $ 446,113     $ 1,650     $ 56,557     $ 504,320  
Costs and expenses:
                               
Product cost and shrink replacement
    162,492             13,364       175,856  
Operating and maintenance expense
    119,699       1,191       23,203       144,093  
Depreciation, amortization and accretion
    31,246       457       2,260       33,963  
Direct general and administrative expense
    6,176             1,875       8,051  
Other, net
    (1,899 )           585       (1,314 )
 
                       
Segment operating income
    128,399       2       15,270       143,671  
Investment income
    79,475       30,435             109,910  
 
                       
Segment profit
  $ 207,874     $ 30,437     $ 15,270     $ 253,581  
 
                       
Reconciliation to the Consolidated Statements of Income:
                               
Segment operating income
                          $ 143,671  
General and administrative expenses:
                               
Allocated-affiliate
                            (25,416 )
Third party-direct
                            (1,755 )
 
                             
Combined operating income
                          $ 116,500  
 
                             

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
     Please read the following discussion of our financial condition and results of operations in conjunction with the consolidated financial statements included in Item 1 of Part I of this quarterly report.
Overview
     We are principally engaged in the business of gathering, transporting, processing and treating natural gas and fractionating and storing natural gas liquids (NGLs). We manage our business and analyze our results of operations on a segment basis. Our operations are divided into three business segments:
    Gathering and Processing — West (West). Our West segment includes Four Corners and ownership interests in Wamsutter, consisting of (i) 100% of the Class A limited liability company membership interests and (ii) 68% of the Class C limited liability company membership interests (together, the Wamsutter Ownership Interests). We account for the Wamsutter Ownership Interests as an equity investment.
 
    Gathering and Processing — Gulf (Gulf). Our Gulf segment includes (1) our 60% ownership interest in Discovery and (2) the Carbonate Trend gathering pipeline off the coast of Alabama. We account for our ownership interest in Discovery as an equity investment.
 
    NGL Services. Our NGL Services segment includes three integrated NGL storage facilities and a 50% undivided interest in a fractionator near Conway, Kansas.
Executive Summary
     Our results for the third quarter of 2009 demonstrate significant continued improvement from difficult circumstances experienced during the last quarter of 2008 and the first half of 2009 when low NGL commodity prices and hurricane-related damages significantly decreased the profitability of our gathering and processing businesses. Net income for the third quarter of 2009 improved approximately 121% over the second quarter of 2009. As discussed further below, Williams, which owns our general-partner interest, continues to provide us with significant, additional support for 2009 which has assisted us in maintaining a higher level of cash retention and a stronger overall liquidity position. We maintained our third-quarter unitholder distribution at $0.635 per unit which equaled our first and second-quarter 2009 distribution.
Recent Events
     On June 3, 2009, a pipeline ruptured at our Ignacio gas processing plant. We expanded the scope of our investigation beyond the repair of the damaged pipes to ensure that other plant piping was appropriately inspected and repaired as necessary. During the outage, we re-routed approximately 250 MMcf/d of the plant’s normal gas throughput capacity to other facilities in the San Juan Basin. The plant was returned to service on June 19. We estimate the incident reduced second-quarter 2009 cash flows by approximately $7.0 million as a result of reduced NGL equity sales volumes of 5 million to 6 million gallons, reduced gathering volumes of 3 to 4 trillion British thermal units (TBtus) and estimated repair costs (including capital expenditures).
     In 2009, Williams waived the incentive distribution rights (IDRs) related to the 2009 distribution periods. These IDRs represent approximately $29.0 million, on an annual basis, at our current per-unit cash distribution level.
     In 2009, our omnibus agreement with Williams was amended to increase the aggregate amount of the credit we can receive related to certain general and administrative expenses for 2009. Consequently, for 2009, Williams will provide up to an additional $10.0 million credit, in addition to the $0.8 million annual credit previously provided under the original omnibus agreement, to the extent that 2009 general and administrative expenses excluded from segment profit exceed $36.0 million. We will record total general and administrative expenses (including those expenses that are subject to the credit by Williams) as an expense, and we will record any credits as capital contributions from Williams. Accordingly, our net income will not reflect the benefit of the credit received from Williams. However, the costs subject to this credit will be allocated entirely to our general partner. As a result, the net income allocated to limited partners on a per-unit basis will reflect the benefit of this credit. For the nine months ended September 30, 2009, the total additional general and administrative credit received from Williams was $1.0 million. No additional general and administrative credit was received during the third quarter.

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Results of Operations
Consolidated Overview
     The following table and discussion is a summary of our consolidated results of operations for the three and nine months ended September 30, 2009, compared to the three and nine months ended September 30, 2008. The results of operations by segment are discussed in further detail following this consolidated overview discussion.
                                                 
    Three months ended             Nine months ended        
    September 30,     % Change from     September 30,     % Change from  
    2009     2008     2008(1)     2009     2008     2008(1)  
    (Thousands)             (Thousands)          
Financial Results:
                                               
Revenues
  $ 125,153     $ 175,713       -29 %   $ 336,948     $ 504,320       -33 %
Costs and expenses:
                                               
Product cost and shrink replacement
    30,003       57,749       +48 %     70,703       175,856       +60 %
Operating and maintenance expense
    37,584       50,477       +26 %     119,871       144,093       +17 %
Depreciation, amortization and accretion
    11,288       11,735       +4 %     33,636       33,963       +1 %
General and administrative expense
    12,197       11,284       -8 %     37,199       35,222       -6 %
Taxes other than income
    2,586       2,314       -12 %     7,347       6,986       -5 %
Other income
    (5,019 )     (5,822 )     -14 %     (3,358 )     (8,300 )     -60 %
 
                                       
Total costs and expenses
    88,639       127,737       +31 %     265,398       387,820       +32 %
 
                                       
Operating income
    36,514       47,976       -24 %     71,550       116,500       -39 %
Equity earnings — Wamsutter
    23,642       20,801       +14 %     57,938       79,475       -27 %
Discovery investment income
    11,058       8,244       +34 %     16,021       30,435       -47 %
Interest expense
    (15,281 )     (16,437 )     +7 %     (45,597 )     (50,793 )     +10 %
Interest income
    14       249       -94 %     75       667       -89 %
 
                                       
Net income
  $ 55,947     $ 60,833       -8 %   $ 99,987     $ 176,284       -43 %
 
                                       
 
(1)   + = Favorable Change; — = Unfavorable Change; NM = A percentage calculation is not meaningful due to change in signs, a zero-value denominator or a percentage change greater than 200.
Three months ended September 30, 2009 vs. three months ended September 30, 2008
     Revenues decreased $50.6 million, or 29%, due primarily to lower product sales in our West segment resulting from significantly lower average NGL sales prices and lower sales of NGLs on behalf of third-party producers, combined with lower revenues in our NGL Services segment.
     Product cost and shrink replacement decreased $27.7 million, or 48%, due primarily to lower product cost and shrink replacement in our West segment related primarily to decreased purchases of NGLs from third-party producers and lower average natural gas prices.
     Operating and maintenance expense decreased $12.9 million, or 26%, due primarily to lower system and imbalance losses in our West segment, combined with lower fractionation fuel cost and favorable system gains in our NGL Services segment.
     Other income includes involuntary conversion gains of $5.0 million and $6.0 million in 2009 and 2008, respectively, related to the November 2007 Ignacio plant fire in our West segment.
     Operating income decreased $11.5 million, or 24%, due primarily to substantially lower average per-unit NGL sales margins in our West segment, partially offset by decreases in operating and maintenance expense in the West and NGL Services segments.
     Equity earnings from Wamsutter increased $2.8 million, or 14%, due to a higher allocation of Wamsutter’s net income to us in 2009, which offset an $8.4 million decrease in Wamsutter’s total net income. As described in Note 5 of our Notes to Consolidated Financial Statements, Wamsutter’s net income is allocated based upon the allocation, distribution, and liquidation provisions of its limited liability company (LLC) agreement. For the third quarter of 2008, this allocation resulted in an $11.2 million allocation of Wamsutter’s net income to the Class C interest not owned by us.

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     Discovery investment income increased $2.8 million, or 34%, due primarily to lower operating and maintenance expense and higher transportation and gathering revenue. Third quarter 2008 was negatively impacted by hurricane-related damages and downtime. These increases were partially offset by lower NGL sales margins resulting from sharply lower average per-unit margins on higher volumes, higher general and administrative expense and higher depreciation and accretion expense.
     Interest expense decreased $1.2 million, or 7%, due primarily to the lower interest rate on our $250.0 million floating-rate term loan.
Nine months ended September 30, 2009 vs. nine months ended September 30, 2008
     Revenues decreased $167.4 million, or 33%, due primarily to lower product sales in our West segment resulting from significantly lower average NGL sales prices and lower sales of NGLs on behalf of third-party producers.
     Product cost and shrink replacement decreased $105.2 million, or 60%, due primarily to lower product cost and shrink replacement in our West segment related primarily to decreased purchases of NGLs from third-party producers and lower average natural gas prices.
     Operating and maintenance expense decreased $24.2 million, or 17%, due primarily to lower system and imbalance losses in our West segment and lower fractionation fuel costs in our NGL Services segment.
     Other income decreased $4.9 million, or 60%, due primarily to lower involuntary conversion gains related to the November 2007 Ignacio plant fire in our West segment.
     Operating income decreased $44.9 million, or 39%, due primarily to substantially lower average per-unit NGL sales margins and unfavorable changes in other income in our West segment, partially offset by lower operating and maintenance expense in both our West and NGL Services segments.
     Equity earnings from Wamsutter decreased $21.5 million, or 27%, due primarily to lower per-unit NGL sales margins, partially offset by a higher percentage allocation of Wamsutter’s net income in 2009.
     Discovery investment income decreased $14.4 million, or 47%, due primarily to lower NGL sales margins resulting from sharply lower average per-unit margins and lower volumes, combined with unfavorable other (income) expense, net and lower fractionation revenue. These decreases were partially offset by higher gathering and transportation revenue, lower operating and maintenance expense, lower depreciation and accretion expense and hurricane-related proceeds received in 2009 under our Discovery business interruption policy.
     Interest expense decreased $5.2 million, or 10%, due primarily to the lower interest rate on our $250.0 million floating-rate term loan.

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Results of operations — Gathering and Processing — West
     The Gathering and Processing — West segment includes our Four Corners natural gas gathering, processing and treating assets and our Wamsutter Ownership Interests.
                                 
    Three months ended     Nine months ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
    (Thousands)  
Financial Results:
                               
Revenues
  $ 109,843     $ 155,217     $ 292,285     $ 446,113  
Costs and expenses, including interest:
                               
Product cost and shrink replacement
    28,059       53,902       65,574       162,492  
Operating and maintenance expense
    32,189       42,129       101,166       119,699  
Depreciation, amortization and accretion
    10,375       10,811       30,997       31,246  
General and administrative expense — direct
    2,348       2,188       6,809       6,176  
Taxes other than income
    2,375       2,119       6,714       6,400  
Other income
    (5,343 )     (5,822 )     (3,679 )     (8,299 )
 
                       
Total costs and expenses, including interest
    70,003       105,327       207,581       317,714  
 
                       
Segment operating income
    39,840       49,890       84,704       128,399  
Equity earnings — Wamsutter
    23,642       20,801       57,938       79,475  
 
                       
Segment profit
  $ 63,482     $ 70,691     $ 142,642     $ 207,874  
 
                       
Four Corners
                                 
    Three months ended   Nine months ended
    September 30,   September 30,
    2009   2008   2009   2008
Operating Statistics:
                               
Gathering volumes (billion British thermal units per day (BBtu/d))
    1,377       1,406       1,351       1,377  
Plant inlet natural gas volumes (BBtu/d)
    653       681       620       636  
NGL equity sales (million gallons)
    44       43       122       122  
NGL margin ($/gallon)
  $ 0.46     $ 0.88     $ 0.39     $ 0.80  
NGL production (million gallons)
    143       134       389       386  
Three months ended September 30, 2009 vs. three months ended September 30, 2008
     Four Corners’ segment operating income decreased $10.1 million, or 20%, due primarily to $17.8 million lower NGL sales margins resulting primarily from a 48% decrease in average per-unit NGL margins and $1.3 million lower condensate and liquefied natural gas (LNG) margins, partially offset by $9.9 million lower operating and maintenance expense. A more detailed analysis of the components of the change in segment operating income is below.
     Revenues decreased $45.4 million, or 29%, due primarily to lower product sales revenue due primarily to:
    $30.4 million related to a 52% decrease in average NGL sales prices realized on sales of NGLs which we received under keep-whole and percent-of-liquids processing contracts (NGL equity sales). This decrease resulted from general decreases in market prices for these commodities between the two periods;
 
    $12.4 million lower sales of NGLs on behalf of third-party producers. Under these arrangements, we purchase the NGLs from the third-party producers and sell them to an affiliate. This decrease was related to general decreases in market prices and slightly lower volumes purchased and is offset by lower associated product costs of $12.5 million discussed below; and
 
    $3.1 million lower condensate and LNG sales from decreased average per-unit prices.
     Product cost and shrink replacement decreased $25.8 million, or 48%, due primarily to:
    $12.5 million decrease from third-party producers who have us purchase their NGLs, which was offset by the corresponding decrease in product sales discussed above;

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    $11.0 million decrease from 58% lower average natural gas prices; and
 
    $1.8 million decrease in condensate and LNG related product cost.
     Operating and maintenance expense decreased $9.9 million, or 24%, due primarily to $7.4 million lower system and imbalance losses resulting primarily from lower volumetric losses and favorable natural gas price changes in system imbalances, combined with $2.4 million lower unreimbursed gathering fuel costs resulting primarily from lower natural gas prices.
     Other income includes involuntary conversion gains of $5.0 million and $6.0 million in 2009 and 2008, respectively, related to the November 2007 Ignacio plant fire.
Nine months ended September 30, 2009 vs. nine months ended September 30, 2008
     Four Corners’ segment operating income decreased $43.7 million, or 34%, due primarily to $49.8 million lower NGL sales margins resulting primarily from a 51% decrease in average per-unit NGL margins, $6.7 million lower condensate and LNG sales margins and $5.2 million lower involuntary conversion gains related to the 2007 Ignacio plant fire. These decreases were partially offset by $18.5 million lower operating and maintenance expense. A more detailed analysis of the components of the change in segment operating income is below.
     Revenues decreased $153.8 million, or 34%, due primarily to the following lower product sales:
    $88.6 million related to a 56% decrease in average NGL sales prices realized on sales of NGLs which we received under keep-whole and percent-of-liquids processing contracts (NGL equity sales). This decrease resulted from general decreases in market prices for these commodities between the two periods;
 
    $50.2 million lower sales of NGLs on behalf of third-party producers. Under these arrangements, we purchase the NGLs from the third-party producers and sell them to an affiliate. This decrease was related to general decreases in market prices and lower volumes and is offset by lower associated product costs of $50.1 million discussed below; and
 
    $14.5 million lower condensate and LNG sales resulting from decreased average per-unit prices and lower LNG volumes.
     Product cost and shrink replacement decreased $96.9 million, or 60%, due primarily to:
    $50.1 million decrease from third-party producers who have us purchase their NGLs, which was offset by the corresponding decrease in product sales discussed above;
 
    $35.9 million decrease from 62% lower average natural gas prices; and
 
    $7.9 million decrease in condensate and LNG-related product cost.
     Operating and maintenance expense decreased $18.5 million, or 15%, due primarily to $18.3 million lower system and imbalance volume losses and $7.4 million lower unreimbursed gathering fuel costs. Both imbalance losses and unreimbursed gathering fuel costs were favorably impacted by lower natural gas costs. While our system losses are generally an unpredictable component of our operating costs, they can be higher during periods of prolonged, severe winter weather, such as those we experienced during January and February of 2008. Additionally, operational inefficiencies caused by the fire at the Ignacio plant impacted our system losses in 2008. These decreases in expense were partially offset by higher right-of-way costs, increased labor costs and 2009 Ignacio pipeline rupture repair costs.
     Other income decreased $4.6 million, or 56%, due primarily to $5.2 million lower involuntary conversion gains in 2009 related to the November 2007 Ignacio plant fire.
Outlook for the remainder of 2009
    NGL and natural gas commodity prices. NGL, crude and natural gas prices are highly volatile. NGL price changes have historically tracked with changes in the price of crude oil. We expect per-unit NGL margins in the fourth quarter of 2009

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      to approximate our third-quarter per-unit NGL margins. Please see the Commodity Derivatives table below for information about our current energy commodity derivative portfolio.
    Future demand for NGL products. Margins in our NGL business are highly dependent upon continued demand within the global economy. NGL products are currently the preferred feedstock for ethylene and propylene production, which are the building blocks of polyethylene or plastics. Although forecasted domestic and global demand for polyethylene has been impacted by the current weakness in the global economy, propylene and ethylene production processes have increasingly shifted from the more expensive crude-based feedstocks to NGL-based feedstocks. Bolstered by abundant long-term natural gas supplies, we expect to benefit from these dynamics in the broader global petrochemical markets.
 
    Gathering and plant inlet volumes. We expect that our fourth-quarter 2009 average gathering and plant inlet volumes will approximate the third-quarter 2009 levels.
 
    Assets on Jicarilla land. We concluded our negotiations with the Jicarilla Apache Nation (JAN) during February 2009 with the execution of a 20-year right-of-way agreement. We expect our total-year 2009 right-of-way expense to be approximately $9.2 million, which is significantly higher than the total-year 2008 cost of $3.5 million for our special business licenses with the JAN. Our year-to-date September 2009 Jicarilla right-of-way expense was $6.4 million.
Commodity Derivatives
     The following table presents our Four Corners energy commodity derivatives including derivatives entered into as of September 30, 2009.
                         
            Volumes   Average
    Period   Hedged   Price/Unit
Designated as hedging instruments:
                       
NGL sales — ethane (million gallons)
  October — December, 2009     11.3     $0.513/gallon
NGL sales — normal butane (million gallons)
  October — December, 2009     1.6     $1.175 gallon
NGL sales — isobutane (million gallons)
  October — December, 2009     1.0     $1.190/gallon
NGL sales — natural gasoline (million gallons)
  October — December, 2009     1.0     $1.404/gallon
Natural gas purchases (million British thermal units per day (MMBtu/d))
  October — December, 2009     7,000     $3.677/MMBtu
Natural gas purchases (million British thermal units per day (MMBtu/d))
  November — December, 2009     5,000     $4.655/MMBtu
     The combined impact of these energy commodity derivatives will provide a margin of $0.1867/gallon on 11.3 million gallons of hedged ethane sales and $0.7155/gallon on 3.6 million gallons of hedged non-ethane sales as listed above.
Wamsutter
     Wamsutter is accounted for using the equity method of accounting. As such, our interest in Wamsutter’s net operating results is reflected as equity earnings in our Consolidated Statements of Income. The following discussion addresses in greater detail the results of operations for 100% of Wamsutter. Please read Note 5 Equity Investments of our Notes to Consolidated Financial Statements for a discussion of how Wamsutter allocates its net income between its member owners, including us.

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    Three months ended     Nine months ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
    (Thousands)  
Financial Results:
                               
Revenues
  $ 52,352     $ 57,820     $ 140,760     $ 195,667  
Costs and expenses, including interest:
                               
Product cost and shrink replacement
    15,655       15,536       37,993       67,992  
Operating and maintenance expense
    3,096       1,357       15,459       10,408  
Depreciation and accretion
    5,684       5,295       16,687       15,736  
General and administrative expense
    3,848       3,198       11,246       10,037  
Taxes other than income
    505       501       1,524       1,404  
Other income
    (78 )     (74 )     (87 )     (591 )
 
                       
Total costs and expenses
    28,710       25,813       82,822       104,986  
 
                       
Net income
  $ 23,642     $ 32,007     $ 57,938     $ 90,681  
 
                       
Williams Partners’ interest — equity earnings per our Consolidated Statements of Income
  $ 23,642     $ 20,801     $ 57,938     $ 79,475  
 
                       
                                 
    Three months ended   Nine months ended
    September 30,   September 30,
    2009   2008   2009   2008
Operating Statistics:
                               
Gathering volumes (BBtu/d)
    543       506       541       487  
Plant inlet natural gas volumes (BBtu/d)
    412       393       423       408  
NGL equity sales (million gallons)
    37       30       108       107  
NGL margin ($/gallon)
  $ 0.43     $ 0.77     $ 0.36     $ 0.65  
NGL production (million gallons)
    114       97       328       317  
Three months ended September 30, 2009 vs. three months ended September 30, 2008
     Wamsutter’s net income decreased $8.4 million, or 26%, due primarily to $12.8 million from lower per-unit NGL sales margins and $1.7 million higher operating and maintenance expense, partially offset by $5.7 million from higher NGL sales volumes.
     Revenues decreased $5.5 million, or 9%, due primarily to $7.1 million lower product sales, partially offset by $2.6 million higher fee-based gathering and processing revenue.
     Product sales revenues decreased $7.1 million, or 18%, due primarily to $23.2 million related to a 49% decrease in average NGL sales prices realized on sales of NGLs which Wamsutter received under keep-whole processing contracts, partially offset by $9.4 million related to an increase in NGL volumes and $6.8 million higher sales of NGLs on behalf of third-party producers. Under these arrangements, Wamsutter purchases NGLs from the third-party producer and sells them to an affiliate. This increase is offset by higher associated product costs of $6.8 million discussed below.
     Gathering and processing fee-based revenues increased $2.6 million, or 15%, due primarily to a 9% increase in the average fee received for these services and a 6% increase in volumes. The average fee increased as a result of negotiated increases in gathering fees and fixed annual percentage or inflation-sensitive contractual escalation clauses.
     Product cost and shrink replacement was relatively flat due to $9.3 million from lower natural gas prices which was more than offset by $6.8 million higher product cost related to higher sales of NGLs on behalf of third-party producers and $2.6 million related to a 17% increase in volumetric shrink requirements associated with higher volumes processed under Wamsutter’s keep-whole processing contracts.
     Operating and maintenance expense increased $1.7 million, or 128%, due primarily to $2.5 million lower system gains related to lower natural gas prices. System gains are an unpredictable component of our operating costs.
Nine months ended September 30, 2009 vs. nine months ended September 30, 2008
     Wamsutter’s net income decreased $32.7 million, or 36%, due primarily to $31.1 million lower NGL sales margins resulting primarily from sharply decreased per-unit NGL margins.

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     Revenues decreased $54.9 million, or 28%, due primarily to $61.8 million lower product sales, partially offset by $9.3 million higher fee-based gathering and processing revenue.
     Product sales revenues decreased $61.8 million, or 45%, due primarily to:
    $70.9 million related to a 53% decrease in average NGL sales prices realized on sales of NGLs which Wamsutter received under keep-whole processing contracts. This decrease resulted from general decreases in market prices for these commodities between the two periods.
 
    $3.1 million related to favorable adjustments to the margin-sharing provisions of one of Wamsutter’s significant contracts in the first quarter of 2008.
     These product sales decreases were partially offset by $11.7 million higher sales of NGLs on behalf of third-party producers. This increase is offset by higher associated product costs of $11.7 million discussed below.
     Gathering and processing fee-based revenues increased $9.3 million, or 18%, due to a 10% increase in average volumes and an 8% increase in the average fee received for these services. The increase in average volumes was due primarily to new wells connected in 2009 and production problems in 2008 caused by severe winter weather conditions. The average fee increased as a result of negotiated increases in gathering fees and fixed annual percentage or inflation-sensitive contractual escalation clauses.
     Product cost and shrink replacement decreased $30 million, or 44%, due primarily to:
    $39.7 million decrease from 61% lower average natural gas prices; and
 
    $1.9 million decrease from 3% lower volumetric shrink requirements due to lower volumes processed under Wamsutter’s keep-whole processing contracts.
     These decreases were partially offset by $11.7 million higher product cost related to sales of NGLs on behalf of third-party producers as discussed above.
     Operating and maintenance expense increased $5.1 million, or 49%, due primarily to $7.0 million lower system gains related to lower natural gas prices. System gains are an unpredictable component of our operating costs.
Outlook for the remainder of 2009
    NGL margins. NGL, crude and natural gas prices are highly volatile. NGL price changes have historically tracked with changes in the price of crude oil. Wamsutter expects fourth-quarter 2009 average per-unit NGL margins to approximate its third-quarter average per-unit NGL margins. Please see the Commodity Derivatives table below for information about Wamsutter’s current energy commodity derivative portfolio.
 
    Future demand for NGL products. Margins in Wamsutter’s NGL business are highly dependent upon continued demand within the global economy. NGL products are currently the preferred feedstock for ethylene and propylene production, which are the building blocks of polyethylene or plastics. Although forecasted domestic and global demand for polyethylene has been impacted by the current weakness in the global economy, propylene and ethylene production processes have increasingly shifted from the more expensive crude-based feedstocks to NGL-based feedstocks. Bolstered by abundant long-term natural gas supplies, Wamsutter expects to benefit from these dynamics in the broader global petrochemical markets.
 
    Gathering and plant inlet volumes. Wamsutter expects average gathering and plant inlet volumes for the fourth quarter of 2009 will be slightly higher than the third-quarter 2009 levels.

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Commodity Derivatives
     The following table presents Wamsutter related energy commodity derivatives as of September 30, 2009.
                         
            Volumes   Average
    Period   Hedged   Price/Unit
Designated as hedging instruments:
                       
NGL sales — ethane (million gallons)
  October — December, 2009     7.4     $ 0.480  
Natural gas purchases (million British thermal units per day (MMBtu/d))
  October — December, 2009     5,000     $ 3.480  
     The combined impact of these energy commodity derivatives will provide a hedged margin of $0.1777/gallon on 7.4 million gallons of ethane sales.
Results of Operations — Gathering and Processing — Gulf
     The Gulf segment includes the Carbonate Trend gathering pipeline and our 60% ownership interest in Discovery.
                                 
    Three months ended     Nine months ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
    (Thousands)  
Financial Results:
                               
Segment revenues
  $ 350     $ 537     $ 1,295     $ 1,650  
Costs and expenses:
                               
Operating and maintenance expense
    124       148       1,274       1,191  
Depreciation
    33       153       125       457  
Other expense, net
    326             326        
 
                       
Total costs and expenses
    483       301       1,725       1,648  
 
                       
Segment operating income (loss)
    (133 )     236       (430 )     2  
Discovery investment income
    11,058       8,244       16,021       30,435  
 
                       
Segment profit
  $ 10,925     $ 8,480     $ 15,591     $ 30,437  
 
                       
Carbonate Trend
     Segment operating income (loss) remained essentially unchanged from 2008.

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Discovery Producer Services — 100%
                                 
    Three months ended     Nine months ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
    (Thousands)  
Financial Results:
                               
Revenues
  $ 50,046     $ 61,280     $ 108,767     $ 231,319  
Costs and expenses, including interest:
                               
Product cost and shrink replacement
    21,729       35,491       50,050       139,090  
Operating and maintenance expense
    3,000       8,079       18,050       23,498  
Depreciation and accretion
    5,005       3,726       13,699       17,511  
General and administrative expense
    1,500       (125 )     4,500       3,375  
Interest income
    (5 )     (143 )     (27 )     (593 )
Other (income) expense, net
    387       510       2,771       (2,287 )
 
                       
Total costs and expenses, including interest
    31,616       47,538       89,043       180,594  
 
                       
Net income
  $ 18,430     $ 13,742     $ 19,724     $ 50,725  
 
                       
Williams Partners’ interest — equity earnings
  $ 11,058     $ 8,244     $ 11,834     $ 30,435  
Business interruption proceeds
                4,187        
 
                       
Discovery investment income
  $ 11,058     $ 8,244     $ 16,021     $ 30,435  
 
                       
                                 
    Three months ended   Nine months ended
    September 30,   September 30,
    2009   2008   2009   2008
Operating Statistics:
                               
Plant inlet natural gas volumes (BBtu/d)
    569       378       455       539  
Gross processing margin ($/MMBtu)
  $ 0.30     $ 0.48     $ 0.22     $ 0.42  
NGL equity sales (million gallons)
    30       21       67       81  
NGL production (million gallons)
    79       43       165       171  
Three months ended September 30, 2009 vs. three months ended September 30, 2008
     Net income increased $4.7 million, or 34%, due primarily to $5.1 million lower operating and maintenance expense and $4.9 million higher transportation and gathering revenue. These decreases were partially offset by $2.0 million lower NGL sales margins resulting from sharply lower average per-unit margins on higher volumes, higher general and administrative expense and higher depreciation and accretion expense. A more detailed analysis of the components of the change in net income is below.
     Revenues decreased $11.2 million, or 18%, due primarily to $17.1 million lower product sales primarily from lower average per-unit NGL prices on higher NGL sales volumes. In September 2008, Discovery was impacted by Hurricanes Ike and Gustav, which resulted in significantly lower 2008 NGL equity sales volumes. These decreases were partially offset by $4.9 million higher transportation and gathering revenues due primarily to higher transportation and gathering volumes including the new Tahiti volumes, higher transportation rates impacted favorably by the hurricane mitigation recovery surcharge and higher gathering rates.
     Product cost and shrink replacement decreased $13.8 million, or 39%, due primarily to lower prices for natural gas purchased for shrink replacement.
     Operating and maintenance expense decreased $5.1 million, or 63%, due primarily to favorable system gains and lower fuel costs.
     Depreciation and accretion increased $1.3 million, or 34%, due primarily to the Tahiti assets being put into service in 2009.
     General and administrative expense increased $1.6 million due primarily to a third-quarter 2008 true-up following the finalization of negotiations between Discovery and Williams for the cost of management services provided by Williams to Discovery.
Nine months ended September 30, 2009 vs. nine months ended September 30, 2008
     Net income decreased $31.0 million, or 61%, due primarily to $37.0 million lower NGL sales margins resulting from sharply lower average per-unit margins and lower volumes of NGL equity sales, combined with a $5.1 million unfavorable change in other (income) expense, net. These decreases were partially offset by $6.6 million higher gathering and transportation revenue, $5.4 million

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lower operating and maintenance expense and $3.8 million lower depreciation and accretion expense. A more detailed analysis of the components of the change in net income is below.
     Revenues decreased $122.6 million, or 53%, due primarily to $127.0 million lower product sales resulting from lower NGL sales volumes sold on behalf of third-party producers and lower NGL equity volumes received as compensation from gas processed under keep-whole and percent-of-liquids arrangements. NGL equity volumes declined due primarily to the 2008 hurricane damages and the June 2008 expiration of the TETCO processing arrangement. Additionally, average per-unit prices on NGL equity sales decreased as a result of general decreases in market prices for these commodities between the two periods. These decreases were partially offset by $6.6 million higher gathering and transportation revenue resulting primarily from higher rates. Discovery began receiving volumes from the Tahiti spar in the second quarter of 2009.
     Product cost and shrink replacement decreased $89.0 million, or 64%, due primarily to a decrease in the related NGL sales on behalf of third-party producers discussed above, combined with lower prices for natural gas purchased for shrink replacement.
     Operating and maintenance expense decreased $5.4 million, or 23%, due primarily to lower fuel costs resulting from lower prices for natural gas and favorable system gains, partially offset by higher maintenance costs.
     Depreciation and accretion decreased $3.8 million, or 22%, due primarily to a 2008 change in the estimated remaining useful lives of the Larose processing plant and the regulated pipeline and gathering system, slightly offset by the impact of the Tahiti assets placed into service in 2009.
     Other (income) expense, net changed unfavorably by $5.1 million due to the absence of a 2008 $3.5 million favorable one-time adjustment for a Federal Energy Regulatory Commission (FERC) settlement, combined with higher property taxes in 2009 following the end of a tax abatement period.
Outlook for the remainder of 2009
    Gross processing margins. NGL, crude and natural gas prices are highly volatile. NGL price changes have historically tracked with changes in the price of crude oil. Discovery expects the gross processing margins for the fourth quarter of 2009 to approximate its third-quarter 2009 margins.
 
    Plant inlet volumes. Discovery’s Larose gas processing plant is currently processing approximately 590 BBtu/d from all sources and Discovery expects this volume to decrease to approximately 540 BBtu/d through the fourth quarter of 2009 primarily due to operational issues.
 
    Other new supplies. During the fourth quarter, Discovery expects to begin receiving approximately 40 BBtu/d of new gas production from the Daniel Boone and Gomez prospects.
 
    Insurance coverage. Discovery’s previous property damage insurance policies expired in June 2009. The availability of named windstorm insurance has been significantly reduced as a result of higher industry-wide damage claims in past years. Additionally, the named windstorm insurance that is available comes at significantly higher premium amounts, higher deductibles and lower coverage limits. Consequently, Discovery elected to not purchase offshore named windstorm coverage for the 2009-2010 insurance year. Despite excluding this coverage, total property damage insurance premiums for the 2009 — 2010 insurance year remained essentially unchanged from the prior year as a result of other premium increases. Additionally, under the new policies, certain deductibles are higher and certain coverage limits are lower than under the previous policies.

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Results of Operations — NGL Services
     The NGL Services segment includes our three NGL storage facilities near Conway, Kansas and our undivided 50% interest in the Conway fractionator.
                                 
    Three months ended     Nine months ended  
    September 30,     September 30,  
    2009     2008     2009     2008  
    (Thousands)  
Financial Results:
                               
Segment revenues
  $ 14,960     $ 19,959     $ 43,368     $ 56,557  
Costs and expenses:
                               
Product cost
    1,944       3,847       5,129       13,364  
Operating and maintenance expense
    5,271       8,200       17,431       23,203  
Depreciation and accretion
    880       771       2,514       2,260  
General and administrative expense — direct
    860       631       2,380       1,875  
Other expense
    209       195       628       585  
 
                       
Total costs and expenses
    9,164       13,644       28,082       41,287  
 
                       
Segment profit
  $ 5,796     $ 6,315     $ 15,286     $ 15,270  
 
                       
Operating Statistics:
                               
Conway storage revenues
  $ 8,531     $ 8,264     $ 24,993     $ 22,699  
Conway fractionation volumes (barrels per day (bpd)) — our 50%
    36,916       43,829       38,109       38,388  
Three months ended September 30, 2009 vs. three months ended September 30, 2008
     NGL Services’ segment profit decreased $0.5 million, or 8%. A more detailed analysis of the components of the change in segment profit is below.
     Segment revenues decreased $5.0 million, or 25%, due primarily to lower fractionation and product sales revenues. The significant components of the revenue fluctuations are addressed more fully below.
    Product sales decreased $1.7 million due to a 53% decrease in average price per barrel, partially offset by higher sales volumes. The decrease in product sales revenue was offset by the related decrease in product cost discussed below.
 
    Fractionation revenues decreased $3.1 million due primarily to a 49% decrease in average fractionation price per barrel on lower volumes. The decrease in the average fractionation price per barrel results from the decline in natural gas prices.
     Product cost decreased $1.9 million, or 49%, due to the sharply lower product prices, partially offset by higher sales volumes discussed above.
     Operating and maintenance expense decreased $2.9 million, or 36%, due primarily to $2.4 million lower fractionation fuel costs resulting from sharply lower natural gas prices and $1.3 million favorable system gains.
Nine months ended September 30, 2009 vs. nine months ended September 30, 2008
     NGL Services’ segment profit remained essentially unchanged. A more detailed analysis of the components of segment profit is below.
     Segment revenues decreased $13.2 million, or 23%, due primarily to lower product sales, fractionation and other fee revenues, partially offset by higher storage revenues. The significant components of the revenue fluctuations are addressed more fully below.
    Product sales decreased $8.1 million due to a 41% decrease in average price per barrel. The decrease in product sales revenue was offset by the related decrease in product cost discussed below.
 
    Fractionation revenues decreased $6.0 million due primarily to a 44% decrease in average fractionation price per barrel. The decrease in the average fractionation price per barrel results from the decline in natural gas prices.
 
    Other fee revenues decreased $1.4 million due primarily to a decrease in customer fees to upgrade butane.

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    Storage revenues increased $2.3 million, or 10%, due primarily to higher new storage leases and overstorage revenue.
     Product cost decreased $8.2 million, or 62%, due to the lower product prices discussed above.
     Operating and maintenance expense decreased $5.8 million, or 25%, due primarily to $6.4 million lower fractionation fuel costs resulting from sharply lower natural gas prices.
Outlook for the remainder of 2009
    Conway storage is sold out for the remainder of the 2009 season; however, incremental revenue opportunities will be evaluated as physical inventories and facility logistics continue to evolve.
 
    We continue to perform a large number of storage cavern workovers and wellhead modifications to comply with Kansas Department of Health and Environment regulatory requirements. We expect outside service costs to continue at current levels throughout 2009 to ensure that we meet the regulatory compliance requirements.
Financial Condition and Liquidity
     Operating results and cash flows for 2009 have been sharply reduced from 2008 levels due to the impact of lower NGL margins during the year. However, we have no debt maturities until 2011, and as of September 30, 2009, we have approximately $101.9 million of cash and cash equivalents and $208.0 million of available capacity under our credit facilities. The availability of the capacity under the credit facilities may be restricted under certain circumstances as discussed below under “ — Credit Facilities.” We believe we have the financial resources and liquidity necessary to meet requirements for working capital, capital and investment expenditures, debt service and quarterly cash distributions.
     We anticipate our sources of liquidity will include:
    Cash and cash equivalents on hand;
 
    Cash generated from operations, including cash distributions from Wamsutter and Discovery;
 
    Insurance recoveries;
 
    Capital contributions from Williams pursuant to the omnibus agreement; and
 
    Use of credit facilities, as needed and available.
     We anticipate our more significant uses of cash to be:
    Maintenance and expansion capital expenditures for our Four Corners and Conway assets;
 
    Contributions we must make to Wamsutter LLC to fund certain of its expansion capital expenditures as defined by Wamsutter’s LLC agreement;
 
    Interest on our long-term debt; and
 
    Quarterly distributions to our unitholders and/or general partner.
     Additionally, we continue to evaluate value-adding growth opportunities in a prudent manner.

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     Available Liquidity at September 30, 2009 (in millions):
         
Cash and cash equivalents
  $ 101.9  
Available capacity under our $450 million five-year senior unsecured credit facility(1)
    188.0  
Available capacity under our $20 million revolving credit facility with Williams as lender
    20.0  
 
     
Total
  $ 309.9  
 
     
 
(1)   The original amount has been reduced by $12.0 million due to the bankruptcy of the parent company and certain affiliates of Lehman Brothers Commercial Bank (Lehman). See Note 6, Long-Term Debt and Credit Facilities, of our Notes to Consolidated Financial Statements. The committed amounts of other participating banks remain in effect and are not impacted by this reduction. Additionally, availability of our capacity under this credit facility in future periods could be constrained by compliance with required covenants.
     These liquidity sources and cash requirements are discussed in greater detail below.
Shelf Registration
     Our shelf registration expired in October 2009. On October 28, 2009, we filed a new shelf registration statement as a well-known seasoned issuer that allows us to issue an unlimited amount of registered debt and limited partnership unit securities.
Wamsutter Distributions
     Wamsutter expects to make quarterly distributions of available cash to its members pursuant to the terms of its LLC agreement. Available cash is defined as cash generated from Wamsutter’s business less reserves that are necessary or appropriate to provide for the conduct of its business and to comply with applicable law and/or debt instruments or other agreements to which it is a party. Wamsutter made the following 2009 distributions to its members (all amounts in thousands):
                                 
    Total Distribution     Our Share        
Date of Distribution   to Members     Class A     Class C     Other Class C  
3/30/09
  $ 13,500     $ 13,500     $     $  
6/30/09
    17,500       17,500              
9/30/09
    24,000       21,625       1,595       780  
 
                       
Total
  $ 55,000     $ 52,625     $ 1,595     $ 780  
 
                       
     The Wamsutter LLC agreement provides that to the extent at the end of the fourth quarter of a distribution year, the Class A member has received less than $70.0 million, the Class C members will be required to repay any distributions received in that distribution year such that the Class A member receives $70.0 million for that distribution year. Thus, our Class A membership interest will ultimately receive the first $70.0 million of cash for any distribution year. The September 30, 2009 cash distribution shown above includes $4.0 million paid to the Class A member related to the March 30, 2009 Class A distribution shortfall. The $4.0 million is calculated based on the difference between the $13.5 million distribution and the $17.5 million quarterly threshold. Additionally, during the first, second and third quarters of 2009, Williams paid Wamsutter and Wamsutter paid us $2.1 million, $2.5 million and $2.4 million, respectively, in transition support payments related to the amount by which Wamsutter’s general and administrative expenses exceeded a contractually-defined spending cap.
Discovery Distributions
     Discovery expects to make quarterly distributions of available cash to its members pursuant to the terms of its LLC agreement. As a result of disruptions and damage from Hurricanes Gustav and Ike, Discovery did not make a distribution for the fourth quarter of 2008 in January 2009. Discovery also did not make a distribution for the first quarter of 2009 in April 2009 as a result of sharply lower NGL margins and reduced volumes following the 2008 hurricane damage to the gathering system.
     In the second quarter of 2009, Discovery’s LLC agreement was amended to calculate available cash based on cash on hand at the end of the month preceding the end of each calendar quarter (e.g. May 31 for the second quarter) and to require distribution of available cash by the end of each calendar quarter. Prior to this amendment, Discovery calculated available cash based on cash on hand at the end of each calendar quarter and made the related distribution within 30 days of the end of each calendar quarter. The change in distribution timing will result in an extra distribution in 2009 to us from Discovery. We received a June 2009 and September

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2009 distribution noted in the table below for the second quarter and third quarter, respectively, and expect to receive a distribution in December 2009 for the fourth quarter.
                 
    Total Distribution to        
Date of Distribution   Members     Our 60% Share  
    (Thousands)  
6/30/09
  $ 5,900     $ 3,540  
9/30/09
    18,500       11,100  
 
           
Total
  $ 24,400     $ 14,640  
 
           
Insurance Recoveries
     On November 28, 2007, the Ignacio gas processing plant sustained significant damages from a fire. The estimated total cost for fire-related repairs is approximately $37.0 million, including $36.0 million in potentially reimbursable expenditures in excess of the insurance deductible. Of this amount, $28.8 million has been incurred through September 30, 2009. We are funding these repairs with cash flows from operations, are seeking reimbursement from our insurance carrier and have received $29.8 million of insurance proceeds to date. Future property damage insurance proceeds will relate to the replacement of capital assets destroyed by the fire. Since the destroyed assets have been fully written off, these proceeds will result in additional involuntary conversion gains.
     On September 13, 2008, Hurricane Ike hit the Gulf Coast area, and Discovery’s offshore gathering system sustained damage. The repair of the gathering system has been completed and the total repair cost incurred through September 30, 2009 was approximately $59.5 million, including $51.1 million in potentially reimbursable expenditures in excess of the insurance deductible. Discovery funded the $6.4 million deductible with cash on hand and filed for and received a prepayment of $38.7 million from the insurance provider. In April 2009, we contributed $6.3 million for our portion of Discovery’s cash call to partners for repair costs in excess of the deductible, net of insurance prepayments. When Discovery receives the remaining insurance proceeds, we expect it to make special distributions back to its members. Discovery does not anticipate any further need for cash calls to fund hurricane repair costs.
Omnibus Agreement with Williams
     In 2009, our omnibus agreement with Williams was amended to increase the aggregate amount of the credit we can receive related to certain general and administrative expenses for 2009. Consequently, for 2009, Williams will provide up to an additional $10.0 million credit, in addition to the $0.8 million annual credit previously provided under the original omnibus agreement, to the extent that 2009 general and administrative expenses excluded from segment profit exceed $36.0 million. We will record total general and administrative expenses (including those expenses that are subject to the credit by Williams) as an expense, and we will record any credits as capital contributions from Williams. Accordingly, our net income will not reflect the benefit of the credit received from Williams. However, the costs subject to this credit will be allocated entirely to our general partner. As a result, the net income allocated to limited partners on a per-unit basis will reflect the benefit of this credit. Total credits received to date are $1.0 million.
Credit Facilities
     Under our $450.0 million senior unsecured credit agreement (Credit Agreement) with Citibank, N.A., we have a $200.0 million revolving credit facility available for borrowings and letters of credit and a $250.0 million term loan. The parent company and certain affiliates of Lehman, who is committed to fund up to $12.0 million of this credit facility, filed for bankruptcy in September 2008. We expect that our ability to borrow under this facility is reduced by this committed amount. The committed amounts of the other participating banks remain in effect and are not impacted by this reduction. However, debt covenants may restrict the full use of the credit facility as discussed below. We must repay borrowings under the Credit Agreement by December 11, 2012. At September 30, 2009, we had a $250.0 million term loan outstanding under the term loan provisions and no amounts outstanding under the revolving credit facility. As a result of the second-quarter 2009 Fitch Ratings (Fitch) downgrade of our senior unsecured debt rating from BB+ to BB, our applicable margin on the $250 million term loan increased 0.25% to 1.0% and the commitment fee on the unused capacity of our revolver increased 0.05% to 0.175%. We expect that the change in these rates will increase interest expense annually by approximately $0.7 million.
     The Credit Agreement contains various covenants that limit, among other things, our, and certain of our subsidiaries’, ability to incur indebtedness, grant certain liens supporting indebtedness, merge, consolidate, sell all or substantially all of our assets or make distributions or other payments other than distributions of available cash under certain conditions. Significant financial covenants under the Credit Agreement, including certain ratios calculated on a rolling four-quarter basis, include the following:

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    We are required to maintain a ratio of consolidated indebtedness to consolidated EBITDA (each as defined in the Credit Agreement) of no greater than 5.00 to 1.00 as of the last day of any fiscal quarter. This ratio may be increased in the case of an acquisition of $50.0 million or more, in which case the ratio will be 5.50 to 1.00 for the fiscal quarter in which the acquisition occurs and three fiscal quarter-periods following such acquisition. At September 30, 2009, our ratio of consolidated indebtedness to consolidated EBITDA, as calculated under this covenant, of approximately 3.92 is in compliance with this covenant.
 
    Our ratio of consolidated EBITDA to consolidated interest expense (each as defined in the Credit Agreement) must be not less than 2.75 to 1.00 as of the last day of any fiscal quarter, unless we obtain an investment grade rating from Standard and Poor’s Ratings Services or Moody’s Investors Service and the rating from the other agency is not less than Ba1 or BB+, as applicable. At September 30, 2009, our ratio of consolidated EBITDA to consolidated interest expense, as calculated under this covenant, of approximately 4.24 is in compliance with this covenant.
     Although it is difficult to predict future commodity pricing, we expect to remain in compliance with the Credit Agreement ratios described above given the current energy commodity price and NGL margin environment. If unexpected events happen or economic conditions or energy commodity prices and NGL margins decline further for a prolonged period of time, our financial covenant ratios may fall below required levels. If such a situation appeared likely, we would take actions necessary to avoid a breach of our covenants, including seeking covenant relief through waivers or the restructuring or replacement of our facility, reducing our indebtedness or seeking assistance from our general partner. Market conditions could make these alternatives challenging, and no assurances can be given that we would be successful in our efforts. Even if successful, we could experience increased borrowing costs and reduced liquidity which could limit our ability to fund capital expenditures and make cash distributions to unitholders. In the event that despite our efforts we breach our financial covenants causing an event of default, the lenders could, among other things, accelerate the maturity of any borrowings under the facility (including our $250.0 million term loan) and terminate their commitments to lend. There are no cross-default provisions in the indentures governing our senior unsecured notes; therefore, a default under the Credit Agreement would not cause a cross default under the indentures governing the senior unsecured notes.
     In addition, our ability to borrow the remaining $188.0 million currently available under the Credit Agreement could be restricted by the impact of weaker energy commodity prices or future borrowings. Either could limit our ability to borrow the full amount under the Credit Agreement to the extent such new borrowing would cause us to be out of compliance at the end of the fiscal quarter with either of the financial ratios discussed above.
     We also have a $20.0 million revolving credit facility with Williams as the lender. The facility is available exclusively to fund working capital requirements. We are required to and have reduced all borrowings under this facility to zero for a period of at least 15 consecutive days once each 12-month period prior to the maturity date of the facility. Borrowings under the credit facility mature June 20, 2010 with four, one-year automatic extensions unless terminated by either party. As of September 30, 2009, we had no outstanding borrowings under the working capital credit facility.
     Wamsutter has a $20.0 million revolving credit facility with Williams as the lender. The credit facility is available exclusively to fund Wamsutter’s working capital requirements. Borrowings under the credit facility mature on December 12, 2009 with four, one-year automatic extensions unless terminated by either party. As of September 30, 2009, Wamsutter had no outstanding borrowings under the credit facility.
Credit Ratings
     The table below presents our current credit ratings and outlook on our senior unsecured long-term debt.
             
            Senior Unsecured
Rating Agency   Date of Last Change   Outlook   Debt Rating
Standard & Poor’s
  November 9, 2007   Stable   BBB-
Moody’s Investor Service
  November 6, 2008   Negative   Ba2
Fitch Ratings
  June 9, 2009   Stable   BB
     On June 9, 2009, Fitch lowered our senior unsecured debt rating from BB+ to BB. On November 6, 2008, Moody’s Investors Service (Moody’s) changed the ratings outlook for Williams and each of Williams’ rated subsidiaries, including WPZ, from “stable” to “negative” following the announcement that Williams’ management and board of directors were evaluating a variety of structural changes to Williams. On February 26, 2009, Moody’s revised Williams, and certain Williams’ rated subsidiaries, excluding us, to “stable” from “negative.”

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     With respect to Moody’s, a rating of “Baa” or above indicates an investment grade rating. A rating below “Baa” is considered to have speculative elements. A “Ba” rating indicates an obligation that is judged to have speculative elements and is subject to substantial credit risk. The “1”, “2” and “3” modifiers show the relative standing within a major category. A “1” indicates that an obligation ranks in the higher end of the broad rating category, “2” indicates a mid-range ranking, and “3” indicates a ranking at the lower end of the category.
     With respect to Standard and Poor’s, a rating of “BBB” or above indicates an investment grade rating. A rating below “BBB” indicates that the security has significant speculative characteristics. A “BB” rating indicates that Standard and Poor’s believes the issuer has the capacity to meet its financial commitment on the obligation, but adverse business conditions could lead to insufficient ability to meet financial commitments. Standard and Poor’s may modify its ratings with a “+” or a “-” sign to show the obligor’s relative standing within a major rating category.
     With respect to Fitch, a rating of “BBB” or above indicates an investment grade rating. A rating below “BBB” is considered speculative grade. A “BB” rating from Fitch indicates that there is a possibility of credit risk developing, particularly as the result of adverse economic change over time; however, business or financial alternatives may be available to allow financial commitments to be met. Fitch may add a “+” or a “-” sign to show the obligor’s relative standing within a major rating category.
     Credit rating agencies perform independent analyses when assigning credit ratings. No assurance can be given that the credit rating agencies will assign us investment grade ratings even if we meet or exceed their current criteria for investment grade ratios.
Capital Expenditures
     The natural gas gathering, treating, processing and transportation, and NGL fractionation and storage businesses are capital-intensive, requiring investment to upgrade or enhance existing operations and comply with safety and environmental regulations. The capital requirements of these businesses consist primarily of:
    Maintenance capital expenditures, which are capital expenditures made to replace partially or fully depreciated assets in order to maintain the existing operating capacity of our assets and to extend their useful lives, include certain well connection expenditures and expenditures which are mandatory and/or essential for maintaining the reliability of our operations; and
 
    Expansion capital expenditures, which tend to be more discretionary than maintenance capital expenditures, include expenditures to acquire additional assets to grow our business, to expand and upgrade plant or pipeline capacity and to construct new plants, pipelines and storage facilities and well connection expenditures which are not classified as maintenance expenditures.
     The following table provides summary information related to our, Wamsutter’s and Discovery’s expected capital expenditures for 2009 and actual spending through September 30, 2009 (millions):
                                                 
    Maintenance   Expansion   Total
            Through           Through           Through
Company   Total Year Estimate   September 30, 2009   Total Year Estimate   September 30, 2009   Total Year Estimate   September 30, 2009
Four Corners
  $ 15–17     $ 13.4     $ 5–6     $ 2.1     $ 20–23     $ 15.5  
Conway
    3–6       2.7       7–9       5.9       10–15       8.6  
Wamsutter — (our share)
    18-20       14.3       1–2       1.0       19-22       15.3  
Discovery — (our share)
    1–3       1.0       5–7       3.5       6–10       4.5  
     The table above does not include capital expenditures related to the replacement of capital assets destroyed by the November 2007 fire at Four Corners’ Ignacio gas processing plant nor repairs to Discovery’s offshore-gathering system damaged by Hurricane Ike. We expect those expenditures that exceed the property insurance deductible will be reimbursed by insurance. Our Statement of Cash Flows through September 30, 2009 includes $3.9 million of these reimbursed or reimbursable capital expenditures for the Ignacio plant.
     We expect to fund Four Corners’ and Conway’s maintenance and expansion capital expenditures with cash flows from operations. Four Corners’ estimated maintenance capital expenditures for 2009 include a range of $9.0 million to $11.0 million related to well connections necessary to connect new sources of throughput for the Four Corners’ system which will serve to partially offset the historical decline in throughput volumes. Four Corners’ 2009 expansion capital expenditures relate primarily to gathering system expansion projects. Conway’s expansion capital expenditures relate to two projects: first, the drilling of two new ethane/propane mix

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caverns and conversion of certain ethane/propane caverns for use as propane storage caverns and second, the completion of a project to improve our flexibility and storage capabilities with respect to refinery grade butane.
     Wamsutter’s estimated maintenance capital expenditures for 2009 include a range of $15.0 million to $17.0 million related to well connections necessary to connect new sources of throughput for the Wamsutter system which will serve to offset the historical decline in throughput volumes. We expect Wamsutter will fund its maintenance capital expenditures through its cash flows from operations.
     Wamsutter funds its expansion capital expenditures through capital contributions from its members as specified in its LLC agreement. This agreement specifies that expansion capital projects with expected total expenditures in excess of $2.5 million at the time of approval and well connections that increase gathered volumes beyond current levels be funded by contributions from its Class B membership, which we do not own. However, our ownership of the Class A membership interest requires us to provide capital contributions related to expansion projects with expected total expenditures less than $2.5 million at the time of approval. Wamsutter issues Class C units to its Class A and Class B members for the expansion capital projects they fund.
     Discovery will fund its 2009 maintenance and expansion capital expenditures either by cash calls to its members or from its cash flows from operations. We funded a cash call from Discovery for $3.1 million in March 2009 for the Tahiti project, and in second-quarter 2009 we received a $1.8 million reimbursement from Williams for a portion of those costs pursuant to the requirements of our omnibus agreement.
Cash Distributions to Unitholders
     We have paid quarterly distributions to unitholders and our general partner interest after every quarter since our initial public offering on August 23, 2005. Our next quarterly distribution of $34.2 million will be paid on November 13, 2009 to the general partner interest and common unitholders of record at the close of business on November 6, 2009.
Results of Operations — Cash Flows
                 
    Nine months ended
    September 30,
Williams Partners L.P.   2009   2008
    (Thousands)
Net cash provided by operating activities
  $ 121,084     $ 169,834  
Net cash used by investing activities
    (29,179 )     (12,824 )
Net cash used by financing activities
    (106,211 )     (111,361 )
     Net cash provided by operating activities decreased $48.8 million for the first nine months of 2009 as compared to the first nine months of 2008 due primarily to $39.0 million lower distributions related to equity earnings in Discovery and Wamsutter and $40.0 million lower operating income excluding non-cash items. These decreases were partially offset by a $21.0 million increase in cash from changes in working capital excluding accrued interest, $5.6 million reduced interest payments resulting from lower interest rates and $4.2 million of 2009 proceeds under our Discovery-related business interruption policy. Cash provided by working capital increased due primarily to changes in accounts receivable and accounts payable.
     Net cash used by investing activities increased $16.4 million for the first nine months of 2009 as compared to first nine months of 2008 due primarily to $11.0 million higher contributions to Discovery for cash calls related to the hurricane damage repair and expansion project funding, $9.0 million lower distributions in excess of equity earnings and $7.2 million lower insurance proceeds relating to the 2007 Ignacio plant fire. These increased uses of cash were partially offset by $9.6 million lower capital expenditures.
     Net cash used by financing activities consists primarily of quarterly distributions to unitholders and our general partner.
                 
    Nine months ended
    September 30,
Wamsutter 100 percent   2009   2008
    (Thousands)
Net cash provided by operating activities
  $ 68,606     $ 107,903  
Net cash used by investing activities
    (80,693 )     (33,415 )
Net cash provided (used) by financing activities
    12,087       (74,488 )

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     Net cash provided by operating activities decreased $39.3 million in the first nine months of 2009 as compared to the first nine months of 2008 due primarily to a $31.8 million decrease in operating income, as adjusted for non-cash expenses and $7.5 million related to changes in working capital.
     Net cash used by investing activities in the first nine months of 2009 and 2008 is primarily comprised of capital expenditures related to plant expansion projects and connection of new wells. The plant expansion projects for 2009 and 2008 include $66.1 million and $14.5 million, respectively, which were funded by Williams in accordance with Wamsutter’s LLC agreement.
     Net cash provided by financing activities in the first nine months of 2009 is primarily related to $67.1 million of capital contributions received from Wamsutter’s members to fund certain capital projects. These contributions were substantially offset by $55.0 million of cash distributions to Wamsutter’s members pursuant to the distribution provisions of Wamsutter’s LLC agreement. Net cash used by financing activities in the first nine months of 2008 is primarily $91.0 million of cash distributions to Wamsutter’s members pursuant to the distribution provisions of Wamsutter’s LLC agreement, partially offset by $16.5 million of capital contributions received from Wamsutter’s members to fund certain capital projects.
                 
    Nine months ended
    September 30,
Discovery 100%   2009   2008
    (Thousands)
Net cash provided (used) by operating activities
  $ (5,669 )   $ 84,818  
Net cash used by investing activities
    (13,924 )     (5,715 )
Net cash used by financing activities
    (7,067 )     (73,672 )
     Net cash provided (used) by operating activities changed unfavorably from $84.8 million net cash provided in the first nine months of 2008 to $5.7 million net cash used in the first nine months of 2009 due primarily to $35.0 million lower net income as adjusted for non-cash items and $55.5 million cash used by changes in working capital resulting primarily from the impact of the hurricanes.
     Net cash used by investing activities includes $17.4 million and $8.5 million of capital spending in the first nine months of 2009 and 2008, respectively, for the Tahiti lateral and other smaller projects. These expenditures were partially offset by changes in Tahiti-related restricted cash in both quarters.
     Net cash used by financing activities decreased $66.6 million due primarily to $51.6 million lower cash distributions to the partners and $15.0 million higher capital contributions from partners in 2009.
Contractual Obligations
     Our contractual obligations increased from those reported in our 2008 Form 10-K by the following amounts as a result of our February 2009 execution of a 20-year right-of-way agreement with the JAN:
                                         
    2009   2010-2011   2012-2013   2014+   Total
    (in thousands)
Operating leases(a)
  $ 7,340     $ 15,056     $ 15,056     $ 112,920     $ 150,372  
 
(a)   Each year from 2010 through 2029 will also include an additional annual payment, which varies depending on the prior year’s per-unit NGL margins and the volume of gas gathered by Four Corners’ gathering facilities subject to the agreement. The table above does not include any such variable amounts related to this agreement.
Off-Balance Sheet Arrangements
     We had no guarantees of off-balance sheet debt to third parties or any other off-balance sheet arrangements at September 30, 2009 or December 31, 2008.
Item 3. Quantitative and Qualitative Disclosures About Market Risk
     Market risk is the risk of loss arising from adverse changes in market rates and prices. The principal market risks to which we are exposed are commodity price risk and interest rate risk.

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Commodity Price Risk
     We are exposed to the impact of fluctuations in the market price of NGLs and natural gas, as well as other market factors, such as market volatility and commodity price correlations. We are exposed to these risks in connection with our owned energy-related assets, our long-term energy-related contracts and our JAN contract. We manage a portion of the risks associated with these market fluctuations using various derivative contracts. The fair value of derivative contracts is subject to changes in energy-commodity market prices, the liquidity and volatility of the markets in which the contracts are transacted, and changes in interest rates. See Note 8, Energy Commodity Derivatives, of our Notes to Consolidated Financial Statements for a discussion of Four Corners’ energy commodity derivatives and “—Results of Operations—Gathering and Processing—West” in Management Discussion and Analysis above for derivative volumes and prices for both Four Corners and Wamsutter.
     We measure the risk in our portfolio using a value-at-risk methodology to estimate the potential one-day loss from adverse changes in the fair value of the portfolio. Value at risk requires a number of key assumptions and is not necessarily representative of actual losses in fair value that could be incurred from the portfolio. Our value-at-risk model uses a Monte Carlo method to simulate hypothetical movements in future market prices and assumes that, as a result of changes in commodity prices, there is a 95% probability that the one-day loss in fair value of the portfolio will not exceed the value at risk. The simulation method uses historical correlations and market forward prices and volatilities. In applying the value-at-risk methodology, we do not consider that the simulated hypothetical movements affect the positions or would cause any potential liquidity issues, nor do we consider that changing the portfolio in response to market conditions could affect market prices and could take longer than a one-day holding period to execute. While a one-day holding period has historically been the industry standard, a longer holding period could more accurately represent the true market risk given market liquidity and our own credit and liquidity constraints. Our derivative contracts are contracts held for nontrading purposes and hedge a portion of our commodity price risk exposure from natural gas liquid sales and natural gas purchases.
     The value at risk at September 30, 2009 for Four Corners’ and Wamsutter’s derivative contracts was $0.2 million and $0.1 million, respectively. At December 31, 2008, we had no outstanding derivatives.
     All of the derivative contracts included in our value-at-risk calculation are accounted for as cash flow hedges. Any change in the fair value of these hedge contracts would generally not be reflected in earnings until the associated hedged item affects earnings.
Interest Rate Risk
     Our interest rate risk exposure is related primarily to our debt portfolio and has not materially changed during the first nine months of 2009. See Note 6, Long-Term Debt and Credit Facilities of our Notes to Consolidated Financial Statements.
Item 4. Controls and Procedures
     Our management, including our general partner’s Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act) (Disclosure Controls) or our internal controls over financial reporting (Internal Controls) will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within Williams Partners L.P. have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected. We monitor our Disclosure Controls and Internal Controls and make modifications as necessary; our intent in this regard is that the Disclosure Controls and the Internal Controls will be modified as systems change and conditions warrant.

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Evaluation of Disclosure Controls and Procedures
     An evaluation of the effectiveness of the design and operation of our Disclosure Controls was performed as of the end of the period covered by this report. This evaluation was performed under the supervision and with the participation of our management, including our general partner’s Chief Executive Officer and Chief Financial Officer. Based upon that evaluation, our general partner’s Chief Executive Officer and Chief Financial Officer concluded that these Disclosure Controls are effective at a reasonable assurance level.
Third-Quarter 2009 Changes in Internal Controls
     There have been no changes during the third quarter of 2009 that have materially affected, or are reasonably likely to materially affect, our Internal Controls.
PART II — OTHER INFORMATION
Item 1. Legal Proceedings
     The information required for this item is provided in Note 9, Commitments and Contingencies, included in the Notes to Consolidated Financial Statements included under Part I, Item 1, which information is incorporated by reference into this item.
Item 1A. Risk Factors
     Part I, Item 1A. Risk Factors in our annual report on Form 10-K for the year ended December 31, 2008, includes certain risk factors that could materially affect our business, financial condition or future results. Those risk factors have not materially changed except as set forth below:
     We are subject to risks associated with climate change.
     There is a growing belief that emissions of greenhouse gases may be linked to climate change. Climate change and the costs that may be associated with its impacts and the regulation of greenhouse gases have the potential to affect our business in many ways, including negatively impacting the costs we incur in providing our products and services, the demand for and consumption of our products and services (due to change in both costs and weather patterns), and the economic health of the regions in which we operate, and all of which can create financial risks.
Our operations are subject to governmental laws and regulations relating to the protection of the environment, which may expose us to significant costs and liabilities and could exceed current expectations.
     The risk of substantial environmental costs and liabilities is inherent in natural gas gathering, transportation, processing and treating, and in the fractionation and storage of NGLs, and we may incur substantial environmental costs and liabilities in the performance of these types of operations. Our operations are subject to extensive federal, state and local environmental laws and regulations governing environmental protection, the discharge of materials into the environment and the security of chemical and industrial facilities. For a description of these laws and regulations, please read “Business and Properties — Environmental Regulation” in our Annual Report on Form 10-K for the year ended December 31, 2008.
     Various governmental authorities, including the U.S. Environmental Protection Agency and analogous state agencies and the United States Department of Homeland Security, have the power to enforce compliance with these laws and regulations and the permits issued under them, oftentimes requiring difficult and costly actions. Failure to comply with these laws, regulations, and permits may result in the assessment of administrative, civil, and criminal penalties, the imposition of remedial obligations, and the issuance of injunctions limiting or preventing some or all of our operations.
     There is inherent risk of the incurrence of environmental costs and liabilities in our business, some of which may be material, due to our handling of the products we gather, transport, process, fractionate and store, air emissions related to our operations, historical industry operations, waste disposal practices, and the prior use of flow meters containing mercury. Joint and several, strict liability may be incurred without regard to fault under certain environmental laws and regulations, including the Federal Comprehensive Environmental Response, Compensation, and Liability Act, the Federal Resource Conservation and Recovery Act, and analogous state laws, for the remediation of contaminated areas and in connection with spills or releases of natural gas and wastes on, under, or from our properties and facilities. Private parties, including the owners of properties through which our pipeline and gathering systems pass, may have the right to pursue legal actions to enforce compliance as well as to seek damages for non-compliance with environmental

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laws and regulations or for personal injury or property damage arising from our operations. Some sites we operate are located near current or former third-party hydrocarbon storage and processing operations, and there is a risk that contamination has migrated from those sites to ours. In addition, increasingly strict laws, regulations and enforcement policies could materially increase our compliance costs and the cost of any remediation that may become necessary.
     Our insurance may not cover all environmental risks and costs or may not provide sufficient coverage if an environmental claim is made against us. Our business may be adversely affected by increased costs due to stricter pollution control requirements or liabilities resulting from non-compliance with required operating or other regulatory permits.
     We make assumptions and develop expectations about possible expenditures related to environmental conditions based on current laws and regulations and current interpretations of those laws and regulations. If the interpretation of laws or regulations, or the laws and regulations themselves, change, our assumptions may change. In addition, new environmental laws and regulations might adversely affect our products and activities, including processing, fractionation, storage and transportation, as well as waste management and air emissions. For instance, federal and state agencies could impose additional safety requirements, any of which could affect our profitability. In addition, recent scientific studies have suggested that emissions of certain gases, commonly referred to as “greenhouse gases,” may be contributing to warming of the earth’s atmosphere, and various governmental bodies have considered legislative and regulatory responses in this area.
     Legislative and regulatory responses related to greenhouse gases and climate change creates the potential for financial risk. The United States Congress and certain states have for some time been considering various forms of legislation related to greenhouse gas emissions. There have also been international efforts seeking legally binding reductions in emissions of greenhouse gases. In addition, increased public awareness and concern may result in more state, regional and/or federal requirements to reduce or mitigate the emission of greenhouse gases.
     Several bills have been introduced in the United States Congress that would compel carbon dioxide emission reductions. On June 26, 2009, the U.S. House of Representatives passed the “American Clean Energy and Security Act” which is intended to decrease annual greenhouse gas emissions through a variety of measures, including a “cap and trade” system which limits the amount of greenhouse gases that may be emitted and incentives to reduce the nation’s dependence on traditional energy sources. The U.S. Senate is currently considering similar legislation, and numerous states have also announced or adopted programs to stabilize and reduce greenhouse gases. While it is not clear whether any federal climate change law will be passed this year, any of these actions could result in increased costs to (i) operate and maintain our facilities, (ii) install new emission controls on our facilities, and (iii) administer and manage any greenhouse gas emissions program. If we are unable to recover or pass through a significant level of our costs related to complying with climate change regulatory requirements imposed on us, it could have a material adverse effect on our results of operations and our ability to make distributions to unitholders. To the extent financial markets view climate change and emissions of greenhouse gases as a financial risk, this could negatively impact our cost of and access to capital.
     Our assets and operations can be affected by weather and other natural phenomena.
     Our assets and operations can be adversely affected by hurricanes, floods, earthquakes, tornadoes and other natural phenomena and weather conditions, including extreme temperatures, making it more difficult for us to realize the historic rates of return associated with these assets and operations. Insurance may be inadequate, and in some instances, we may be unable to obtain insurance on commercially reasonable terms, if at all. A significant disruption in operations or a significant liability for which we were not fully insured could have a material adverse effect on our business, results of operations and financial condition and our ability to make distributions to unitholders.
     Our customers’ energy needs vary with weather conditions. To the extent weather conditions are affected by climate change or demand is impacted by regulations associated with climate change, customers’ energy use could increase or decrease depending on the duration and magnitude of the changes, leading either to increased investment or decreased revenues.

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Item 6. Exhibits
     
Exhibit 3.1
  Certificate of Limited Partnership of Williams Partners L.P. (filed on May 2, 2005 as Exhibit 3.1 to Williams Partners L.P.’s registration statement on Form S-1 (File No. 333-124517)) and incorporated herein by reference.
 
   
Exhibit 3.2
  Certificate of Formation of Williams Partners GP LLC (filed on May 2, 2005 as Exhibit 3.3 to Williams Partners L.P.’s registration statement on Form S-1 (File No. 333-124517)) and incorporated herein by reference.
 
   
Exhibit 3.3
  Amended and Restated Agreement of Limited Partnership of Williams Partners L.P. (including form of common unit certificate), as amended by Amendments Nos. 1,2,3,4 and 5 (filed on April 30, 2009 as Exhibit 3.3 to Williams Partners L.P.’s quarterly report on Form 10-Q) (File No. 001-32599)) and incorporated herein by reference.
 
   
Exhibit 3.4
  Amended and Restated Limited Liability Company Agreement of Williams Partners GP LLC (filed on August 26, 2005 as Exhibit 3.2 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-32599)) and incorporated herein by reference.
 
   
Exhibit 31.1
  Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(31) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*
 
   
Exhibit 31.2
  Certification of Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(31) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*
 
   
Exhibit 32
  Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
 
*   Filed herewith

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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
         
  WILLIAMS PARTNERS L.P.
(Registrant)
 
 
  By:   Williams Partners GP LLC, its general partner    
         
  /s/ Ted T. Timmermans    
  Ted. T. Timmermans   
  Controller (Duly Authorized Officer and Principal Accounting Officer)   
 
October 29, 2009

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EXHIBIT INDEX
     
Exhibit    
Number   Description
 
   
Exhibit 3.1
  Certificate of Limited Partnership of Williams Partners L.P. (filed on May 2, 2005 as Exhibit 3.1 to Williams Partners L.P.’s registration statement on Form S-1 (File No. 333-124517)) and incorporated herein by reference.
 
   
Exhibit 3.2
  Certificate of Formation of Williams Partners GP LLC (filed on May 2, 2005 as Exhibit 3.3 to Williams Partners L.P.’s registration statement on Form S-1 (File No. 333-124517)) and incorporated herein by reference.
 
   
Exhibit 3.3
  Amended and Restated Agreement of Limited Partnership of Williams Partners L.P. (including form of common unit certificate), as amended by Amendments Nos. 1,2,3,4 and 5 (filed on April 30, 2009 as Exhibit 3.3 to Williams Partners L.P.’s quarterly report on Form 10-Q) (File No. 001-32599)) and incorporated herein by reference.
 
   
Exhibit 3.4
  Amended and Restated Limited Liability Company Agreement of Williams Partners GP LLC (filed on August 26, 2005 as Exhibit 3.2 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-32599)) and incorporated herein by reference.
 
   
Exhibit 31.1
  Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(31) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*
 
   
Exhibit 31.2
  Certification of Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, and Item 601(b)(31) of Regulation S-K, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*
 
   
Exhibit 32
  Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
 
*   Filed herewith

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