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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 March 31, 2006
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. Yesþ Noo
     Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one):
         
Large accelerated filero   Accelerated filero   Non-accelerated filerþ
     Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YesoNoþ
     The registrant had 7,006,146 common units and 7,000,000 subordinated units outstanding as of May 1, 2006.
 
 

 


 

WILLIAMS PARTNERS L.P.
INDEX
         
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    23  
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    25  
 Rule 13a-14(a)/15d-14(a) Certification of CEO
 Rule 13a-14(a)/15d-14(a) Certification of CFO
 Section 1350 Certifications of CEO and CFO
FORWARD-LOOKING STATEMENTS
     Certain matters discussed in this quarterly report, excluding historical information, include forward-looking statements — statements that discuss our expected future results based on current and pending business operations. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995.
     Forward-looking statements can be identified by words such as “anticipates,” “believes,” “expects,” “planned,” “scheduled,” “could,” “continues,” “estimates,” “forecasts,” “might,” “potential,” “projects” or similar expressions. Similarly, statements that describe our future plans, objectives or goals are also forward-looking statements.
     Although we believe these forward-looking statements are based on reasonable assumptions, statements made regarding future results are subject to a number of assumptions, uncertainties and risks that may cause future results to be materially different from the results stated or implied in this document. These risks and uncertainties include, among other things:
    We may not have sufficient cash from operations to enable us to pay the minimum quarterly distribution following establishment of cash reserves and payment of fees and expenses, including payments to our general partner.
 
    Because of the natural decline in production from existing wells and competitive factors, the success of our gathering and transportation businesses depends on our ability to connect new sources of natural gas supply, which is dependent on factors beyond our control, including Discovery’s ability to complete its Tahiti lateral expansion project. Any decrease in supplies of natural gas could adversely affect our business and operating results.

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    Our processing, fractionation and storage businesses could be affected by any decrease in the price of natural gas liquids or a change in the price of natural gas liquids relative to the price of natural gas.
 
    Williams’ revolving credit facility and Williams’ public indentures contain financial and operating restrictions that may limit our access to credit. In addition, our ability to obtain credit in the future will be affected by Williams’ credit ratings.
 
    Our general partner and its affiliates have conflicts of interest and limited fiduciary duties, which may permit them to favor their own interests to the detriment of our unitholders.
 
    Even if unitholders are dissatisfied, they cannot currently remove our general partner without its consent.
 
    You may be required to pay taxes on your share of our income even if you do not receive any cash distributions from us.
 
    Lower natural gas and oil prices could adversely affect our fractionation and storage businesses.
 
    We depend on certain key customers and producers for a significant portion of our revenues and supply of natural gas and natural gas liquids. The loss of any of these key customers or producers could result in a decline in our revenues and cash available to pay distributions.
 
    If third-party pipelines and other facilities interconnected to our pipelines and facilities become unavailable to transport natural gas and natural gas liquids or to treat natural gas, our revenues and cash available to pay distributions could be adversely affected.
 
    Our operations are subject to operational hazards and unforeseen interruptions for which we may or may not be adequately insured.
     Additional information about risks and uncertainties that could cause actual results to differ materially from forward-looking statements is contained in Item 1A of our annual report on Form 10-K filed March 3, 2006. The forward-looking statements included in this report are only made as of the date of this report and we undertake no obligation to publicly update forward-looking statements to reflect subsequent events or circumstances.

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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  
    March 31,  
    2006     2005  
Revenues:
               
Storage
  $ 5,105     $ 4,388  
Fractionation
    3,953       2,430  
Gathering
    733       880  
Product sales:
               
Affiliate
    6,141       2,829  
Third-party
          63  
Other
    1,131       779  
 
           
 
               
Total revenues
    17,063       11,369  
 
               
Costs and expenses:
               
Operating and maintenance expense:
               
Affiliate
    4,000       2,653  
Third-party
    3,691       3,075  
Product cost
    5,723       2,735  
Depreciation and accretion
    900       905  
General and administrative expense:
               
Affiliate
    1,415       687  
Third-party
    533       19  
Taxes other than income
    207       192  
 
           
 
               
Total costs and expenses
    16,469       10,266  
 
           
 
               
Operating income
    594       1,103  
 
               
Equity earnings – Discovery Producer Services
    3,781       2,212  
Interest expense:
               
Affiliate
    (15 )     (2,805 )
Third-party
    (221 )     (199 )
Interest income
    70        
 
           
 
               
Net income
  $ 4,209     $ 311  
 
           
 
               
Allocation of 2006 net income:
               
Net income
  $ 4,209          
Allocation of net loss to general partner
    (689 )        
 
             
Allocation of net income to limited partners
  $ 4,898          
 
             
 
               
Basic and diluted net income per limited partner unit:
               
Common units
  $ 0.35          
Subordinated units
    0.35          
 
               
Weighted average number of units outstanding:
               
Common units
    7,006,146          
Subordinated units
    7,000,000          
See accompanying notes to consolidated financial statements.

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WILLIAMS PARTNERS L.P.
CONSOLIDATED BALANCE SHEETS
                 
    March 31,     December 31,  
    2006     2005  
    (Unaudited)          
    (Thousands)  
ASSETS
 
               
Current assets:
               
Cash and cash equivalents
  $ 4,315     $ 6,839  
Accounts receivable:
               
Trade
    1,424       1,840  
Other
    1,524       2,104  
Gas purchase contract — affiliate
    5,155       5,320  
Product imbalance
    295       760  
Other current assets
    1,370       1,133  
 
           
Total current assets
    14,083       17,996  
 
               
Investment in Discovery Producer Services
    149,641       150,260  
Property, plant and equipment, net
    68,239       67,931  
Gas purchase contract — noncurrent — affiliate
    3,565       4,754  
 
           
 
               
Total assets
  $ 235,528     $ 240,941  
 
           
LIABILITIES AND PARTNERS’ CAPITAL
 
               
Current liabilities:
               
Accounts payable:
               
Trade
  $ 3,269     $ 3,906  
Affiliate
    2,378       4,729  
Deferred revenue
    222       3,552  
Accrued liabilities
    2,718       2,373  
 
           
Total current liabilities
    8,587       14,560  
 
               
Environmental remediation liabilities
    3,964       3,964  
Other noncurrent liabilities
    763       762  
Commitments and contingent liabilities (Note 5)
               
Partners’ capital
    222,214       221,655  
 
           
 
               
Total liabilities and partners’ capital
  $ 235,528     $ 240,941  
 
           
See accompanying notes to consolidated financial statements.

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WILLIAMS PARTNERS L.P.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
                 
    Three Months Ended  
    March 31,  
    2006     2005  
    (Thousands)  
OPERATING ACTIVITIES:
               
Net income
  $ 4,209     $ 311  
Adjustments to reconcile to cash provided (used) by operations:
               
Depreciation and accretion
    900       905  
Amortization of gas purchase contract — affiliate
    1,354        
Distributions in excess of / (undistributed) equity earnings of Discovery Producer Services
    619       (2,212 )
Cash provided (used) by changes in assets and liabilities:
               
Accounts receivable
    996       678  
Other current assets
    (237 )     (45 )
Accounts payable
    (3,028 )     (1,495 )
Accrued liabilities
    345       (209 )
Deferred revenue
    (3,330 )     (3,200 )
Other, including changes in noncurrent liabilities
    567       1,212  
 
           
 
               
Net cash provided (used) by operating activities
    2,395       (4,055 )
 
           
 
               
INVESTING ACTIVITIES:
               
Capital expenditures
    (1,165 )     (212 )
 
           
 
               
Net cash used by investing activities
    (1,165 )     (212 )
 
           
 
               
FINANCING ACTIVITIES:
               
Distributions to unitholders
    (5,002 )      
Contributions per omnibus agreement
    1,248        
Changes in advances from affiliates – net
          4,267  
 
           
 
               
Net cash provided (used) by financing activities
    (3,754 )     4,267  
 
           
 
               
Decrease in cash and cash equivalents
    (2,524 )      
Cash and cash equivalents at beginning of period
    6,839        
 
           
 
               
Cash and cash equivalents at end of period
  $ 4,315     $  
 
           
See accompanying notes to consolidated financial statements.

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WILLIAMS PARTNERS L.P.
CONSOLIDATED STATEMENT OF PARTNERS’ CAPITAL
(Unaudited)
                                 
                            Total  
    Limited Partners     General     Partners’  
    Common     Subordinated     Partner     Capital  
    (Thousands)  
Balance — January 1, 2006
  $ 108,526     $ 108,491     $ 4,638     $ 221,655  
Net income (loss) attributable to the period January 1, 2006 through March 31, 2006
    2,449       2,449       (689 )     4,209  
Cash distributions ($.35 per unit)
    (2,452 )     (2,450 )     (100 )     (5,002 )
Contributions pursuant to the Omnibus Agreement
                1,248       1,248  
Other
    104                   104  
 
                       
Balance – March 31, 2006
  $ 108,627     $ 108,490     $ 5,097     $ 222,214  
 
                       
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 quarterly 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 Discovery Producer Services LLC (“Discovery”), in which we own a 40 percent interest. When we refer to Discovery by name, we are referring exclusively to its businesses and operations.
     We are a Delaware limited partnership formed by The Williams Companies, Inc. (“Williams”) in February 2005. On August 23, 2005, we completed our initial public offering (“IPO”) of common units. We own (1) a 40 percent interest in Discovery; (2) the Carbonate Trend gathering pipeline off the coast of Alabama; (3) three integrated natural gas liquids (“NGL”) product storage facilities near Conway, Kansas; and (4) a 50 percent undivided ownership interest in a fractionator near Conway, Kansas. Williams Partners GP LLC, a Delaware limited liability company and an indirect wholly owned subsidiary of Williams, serves as the general partner for us and owns all of our two percent general partner interest. All of our activities are conducted through Williams Partners Operating LLC (“Williams OLLC”), an operating limited liability company (wholly owned by us).
     On April 6, 2006, we entered into a Purchase and Sale Agreement (the “Purchase Agreement”) with Williams Energy Services, LLC (“WES”), Williams Field Services Group, LLC (“WFSG”), Williams Field Services Company, LLC (“WFSC”), Williams OLLC and our general partner. Pursuant to the Purchase Agreement, WES, WFSG, WFSC and our general partner will contribute to us a 25.1 percent membership interest in Williams Four Corners LLC (“Four Corners”) for aggregate consideration of $360 million. Prior to or at closing, WFSC will contribute to Four Corners its natural gas gathering, processing and treating assets in the San Juan Basin in New Mexico and Colorado. The closing of the Purchase Agreement is subject to the satisfaction of a number of conditions, including our ability to obtain financing and the receipt of all necessary consents. We expect closing to occur in the second quarter of 2006. Please read our Form S-1 filing, as filed with the Securities and Exchange Commission on April 7, 2006, for more information related to this transaction.
     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 Annual Report on Form 10-K for the year ended December 31, 2005. 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 March 31, 2006, and results of operations and cash flows for the three months ended March 31, 2006 and 2005. All intercompany transactions have been eliminated.
     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 January 2006, Williams, adopted Statement of Financial Accounting Standards (“SFAS”) No. 123(R), “Share-Based Payment.” Accordingly, payroll costs charged to us by our general partner reflect additional compensation costs related to the adoption of this accounting standard. These costs relate to Williams’ common stock equity awards made between Williams and its employees. For the first quarter of 2006 there is approximately $100,000 of cost related to Williams’ share-based payment plan reflected in our general and administrative expense on the Consolidated Statements of Income. The cost is charged to us through specific allocations of certain employees if they directly support our operations, and through an allocation methodology among all Williams affiliates if they provide indirect support. These allocated costs are based on a three-factor formula, which considers revenues; property, plant and equipment; and payroll.

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WILLIAMS PARTNERS L.P.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
Note 3. Allocation of Net Income and Distributions
     The allocation of net income between our general partner and limited partners for the period January 1, 2006 through March 31, 2006 is as follows (in thousands):
         
Allocation to general partner:
       
Net income
  $ 4,209  
Charges direct to general partner:
       
Reimbursable general and administrative costs
    789  
 
     
 
       
Income before direct charges to general partner
    4,998  
General partner’s share of net income
    2.0 %
 
     
 
       
General partner’s allocated share of net income before direct charges
    100  
Direct charges to general partner
    (789 )
 
     
 
       
Net loss allocated to general partner
  $ (689 )
 
     
 
       
Net income
  $ 4,209  
Net loss allocated to general partner
    (689 )
 
     
 
       
Net income allocated to limited partners
  $ 4,898  
 
     
     We paid or have authorized payment of the following cash distributions during 2005 and 2006 (in thousands, except for per unit amounts):
                                         
    Per Unit   Common   Subordinated   General   Total Cash
Payment Date   Distribution   Units   Units   Partner   Distribution
11/14/2005 (a)
  $ 0.1484     $ 1,039     $ 1,039     $ 42     $ 2,120  
2/14/2006
  $ 0.3500     $ 2,452     $ 2,450     $ 100     $ 5,002  
5/15/2006 (b)
  $ 0.3800     $ 2,662     $ 2,660     $ 109     $ 5,431  
 
(a)   This distribution represents the $0.35 per unit minimum quarterly distribution pro-rated for the 39-day period following the IPO closing date (August 23, 2005 through September 30, 2005).
 
(b)   The board of directors of our general partner declared this cash distribution on April 27, 2006 to be paid on May 15, 2006 to unitholders of record at the close of business on May 8, 2006.

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WILLIAMS PARTNERS L.P.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
Note 4. Investment in Discovery Producer Services LLC
     Due to the significance of Discovery’s equity earnings to our results of operations, the summarized financial position and results of operations for 100 percent of Discovery are presented below (in thousands):
                 
    March 31,     December 31,  
    2006     2005  
    (Unaudited)          
Current assets
  $ 62,700     $ 70,525  
Noncurrent restricted cash and cash equivalents
    41,859       44,559  
Property, plant and equipment
    340,935       344,743  
Current liabilities
    (27,475 )     (45,070 )
Non-current liabilities
    (1,146 )     (1,121 )
 
           
 
               
Members’ capital
  $ 416,873     $ 413,636  
 
           
                 
    Three Months Ended  
    March 31,  
    2006     2005  
    (Unaudited)  
Revenues
  $ 62,120     $ 27,289  
 
               
Costs and expenses
    53,294       22,042  
Interest income
    (626 )     (284 )
 
           
 
               
Net income
  $ 9,452     $ 5,531  
 
           
Note 5. Commitments and Contingencies
     Environmental Matters. 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 nine years.
     We have an insurance policy that covers up to $5 million of remediation costs until an active remediation system is in place or April 30, 2008, whichever is earlier, excluding operation and maintenance costs and ongoing monitoring costs, for these projects to the extent such costs exceed a $4.2 million deductible. The policy also covers costs incurred as a result of third party claims associated with then existing but unknown contamination related to the storage facilities. The aggregate limit under the policy for all claims is $25 million. In addition, under an omnibus agreement with Williams entered into at the closing of the IPO, Williams agreed to indemnify us for the $4.2 million deductible (less amounts expended prior to the closing of the IPO) of remediation expenditures not covered by the insurance policy, excluding costs of project management and soil and groundwater monitoring. There is a $14 million cap on the total amount of indemnity coverage under the omnibus agreement, which will be reduced by actual recoveries under the environmental insurance policy. There is also a three-year time limitation from the IPO closing date, August 23, 2005. The benefit of this indemnification will be accounted for as a capital contribution to us by Williams as the costs are reimbursed. We estimate that the approximate cost of this project management and soil and groundwater monitoring associated with the four remediation projects at the Conway storage facilities and for which we will not be indemnified will be approximately $200,000 to $400,000 per year following the completion of the remediation work.

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WILLIAMS PARTNERS L.P.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
     At March 31, 2006, we had accrued liabilities totaling $5.3 million for these costs. 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 KDHE and other governmental authorities and other factors.
     Hurricane Costs. At March 31, 2006, Williams had an insurance receivable of $965,000 for costs incurred to assess property damage caused by Hurricane Ivan in 2004 to the Carbonate Trend pipeline. Although Williams believes these costs to be recoverable under its property damage insurance, it has not received approval from its insurer and it is reasonably possible that the insurer will deny some or all of this claim. If Williams’ is unable to recover these costs from insurance we will recognize a loss for these costs as they relate to the Carbonate Trend pipeline. This loss will be fully allocated to our general partner.
     Other. We are not currently a party to any legal proceedings but are a party to various administrative and regulatory proceedings that have arisen in the ordinary course of our business. 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 or other indemnification arrangements, will not have a material adverse effect upon our future financial position.

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WILLIAMS PARTNERS L.P.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)
Note 6. Segment Disclosures
     Our reportable segments are strategic business units that offer different products and services. The segments are managed separately because each segment requires different industry knowledge, technology and marketing strategies.
                         
    Gathering &     NGL        
    Processing     Services     Total  
    (Thousands)  
Three Months Ended March 31, 2006:
                       
 
                       
Segment revenues
  $ 733     $ 16,330     $ 17,063  
 
                       
Operating and maintenance expense
    242       7,449       7,691  
Product cost
          5,723       5,723  
Depreciation and accretion
    300       600       900  
Direct general and administrative expense
    2       301       303  
Taxes other than income
          207       207  
 
                 
 
                       
Segment operating income
    189       2,050       2,239  
Equity earnings
    3,781             3,781  
 
                 
 
                       
Segment profit
  $ 3,970     $ 2,050     $ 6,020  
 
                 
 
                       
Reconciliation to the Consolidated Statements of Income:
                       
Segment operating income
                  $ 2,239  
General and administrative expenses:
                       
Allocated-affiliate
                    (1,117 )
Third party-direct
                    (528 )
 
                     
 
                       
Combined operating income
                  $ 594  
 
                     
 
                       
Three Months Ended March 31, 2005:
                       
 
                       
Segment revenues
  $ 880     $ 10,489     $ 11,369  
 
                       
Operating and maintenance expense
    107       5,621       5,728  
Product cost
          2,735       2,735  
Depreciation and accretion
    300       605       905  
Direct general and administrative expense
          203       203  
Taxes other than income
          192       192  
 
                 
 
                       
Segment operating income
    473       1,133       1,606  
Equity earnings
    2,212             2,212  
 
                 
 
                       
Segment profit
  $ 2,685     $ 1,133     $ 3,818  
 
                 
 
                       
Reconciliation to the Consolidated Statements of Income:
                       
Segment operating income
                  $ 1,606  
Allocated general and administrative expense
                    (503 )
 
                     
 
                       
Combined operating income
                  $ 1,103  
 
                     

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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 historical consolidated financial statements included in Item 1 of Part I of this quarterly report.
Overview
     We are a Delaware limited partnership formed in February 2005. On August 23, 2005, we completed our initial public offering (“IPO”) of common units. We are principally engaged in the business of gathering, transporting and processing 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 two business segments:
    Gathering and Processing. Our Gathering and Processing segment includes (1) our 40 percent ownership interest in Discovery and (2) the Carbonate Trend gathering pipeline off the coast of Alabama. Discovery owns an integrated natural gas gathering and transportation pipeline system extending from offshore in the Gulf of Mexico to a natural gas processing facility and an NGL fractionator in Louisiana. These assets generate revenues by providing natural gas gathering, transporting and processing services and integrated NGL fractionating services to customers under a range of contractual arrangements. Although Discovery includes fractionation operations, which would normally fall within the NGL Services segment, it is primarily engaged in gathering and processing and is managed as such.
 
    NGL Services. Our NGL Services segment includes three integrated NGL storage facilities and a 50 percent undivided interest in a fractionator near Conway, Kansas. These assets generate revenues by providing stand-alone NGL fractionation and storage services using various fee-based contractual arrangements where we receive a fee or fees based on actual or contracted volumetric measures.
Recent Events
     On April 6, 2006, we entered into a Purchase and Sale Agreement (the “Purchase Agreement”) with Williams Energy Services, LLC (“WES”), Williams Field Services Group, LLC (“WFSG”), Williams Field Services Company, LLC (“WFSC”), Williams Partners GP LLC, our general partner, and Williams Partners Operating LLC, our operating subsidiary (“Williams OLLC”). Pursuant to the Purchase Agreement, WES, WFSG, WFSC and our general partner will contribute to us a 25.1 percent membership interest in Williams Four Corners LLC (“Four Corners”) for aggregate consideration of $360 million. Prior to or at closing, WFSC will contribute to Four Corners its natural gas gathering, processing and treating assets in the San Juan Basin in New Mexico and Colorado. The closing of the Purchase Agreement is subject to the satisfaction of a number of conditions, including our ability to obtain financing and the receipt of all necessary consents. We expect closing to occur in the second quarter of 2006. Please read our Form S-1 filing, as filed with the Securities and Exchange Commission on April 7, 2006, for more information related to this transaction.
     In May 2006, Williams replaced its $1.275 billion secured credit facility with a $1.5 billion unsecured credit facility. The new facility contains substantially similar terms and covenants. This revolving credit facility is available for borrowings and letters of credit and will continue to allow us to borrow up to $75 million for general partnership purposes, including acquisitions, but only to the extent that sufficient amounts remain unborrowed by Williams and its other subsidiaries.
Results of operations
Consolidated Overview
     The following table and discussion is a summary of our consolidated results of operations for the three months ended March 31, 2006, compared to the three months ended March 31, 2005. The results of operations by segment are discussed in further detail following this consolidated overview discussion.

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    Three months ended March 31,     % Change  
    2006     2005     from 2005 (1)  
    (Thousands)          
Revenues
  $ 17,063     $ 11,369       +50 %
Costs and expenses:
                       
Operating and maintenance expense
    7,691       5,728       -34 %
Product cost
    5,723       2,735       -109 %
Depreciation and accretion
    900       905       +1 %
General and administrative expense
    1,948       706       -176 %
Taxes other than income
    207       192       -8 %
 
                   
 
                       
Total costs and expenses
    16,469       10,266       -60 %
 
                   
 
                       
Operating income
    594       1,103       -46 %
Equity earnings – Discovery
    3,781       2,212       +71 %
Interest expense
    (236 )     (3,004 )     +92 %
Interest income
    70           NM
 
                   
 
                       
Net income
  $ 4,209     $ 311     NM
 
                   
 
(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 March 31, 2006 vs. three months ended March 31, 2005
     Revenues increased $5.7 million, or 50 percent, due primarily to higher revenues in our NGL Services segment reflecting higher fractionation and storage revenues and increased product sales volumes. These increases are discussed in detail in the “Results of Operations – NGL Services” section.
     Operating and maintenance expense increased $2.0 million, or 34 percent, due primarily to our NGL Services segment where fuel and power costs and cavern workover projects increased, partially offset by a decrease in product imbalance adjustments.
     Product cost increased $3.0 million, or 109 percent, directly related to increased product sales volumes discussed above.
     General and administrative expense increased $1.2 million, or 176 percent, due primarily to the increased costs of being a publicly-traded partnership. These costs included $0.4 million for audit fees, tax return preparation and director fees, $0.3 million for charges allocated by Williams for accounting, legal, and other support, and $0.3 million for conflict committee activity associated with our potential acquisition of an interest in Four Corners.
     Operating income decreased $0.5 million, or 46 percent, due primarily to higher general and administrative expense and higher operating and maintenance expense, partially offset by higher NGL Services’ fractionation and storage revenues.
     Equity earnings from Discovery increased $1.6 million, or 71 percent. This increase is discussed in detail in the “Results of Operations — Gathering and Processing” section.
     Interest expense decreased $2.8 million, or 92 percent, due to the forgiveness of the advances from Williams in conjunction with the closing of the IPO on August 23, 2005, slightly offset by the commitment fees on our $75 million borrowing capacity under Williams’ revolving credit facility and our $20 million working capital revolving credit facility with Williams.

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Results of operations – Gathering and Processing
     The Gathering and Processing segment includes the Carbonate Trend gathering pipeline and our 40 percent ownership interest in Discovery.
                 
    Three months ended  
    March 31,  
    2006     2005  
    (Thousands)  
Segment revenues
  $ 733     $ 880  
 
               
Costs and expenses:
               
Operating and maintenance expense
    242       107  
Depreciation
    300       300  
General and administrative expense — direct
    2        
 
           
 
               
Total costs and expenses
    544       407  
 
           
 
               
Segment operating income
    189       473  
Equity earnings — Discovery
    3,781       2,212  
 
           
 
               
Segment profit
  $ 3,970     $ 2,685  
 
           
Carbonate Trend
Three months ended March 31, 2006 vs. three months ended March 31, 2005
     Segment revenues decreased $147,000, or 17 percent, due primarily to a 20 percent decline in average daily gathered volumes between 2006 and 2005 caused by normal reservoir depletion.
     Operating and maintenance expense increased $135,000, or 126 percent, due to $44,000 in increased costs for inhibitor chemicals and internal pipeline corrosion inspection, and $91,000 related to insurance costs.
     Segment operating income decreased $284,000, or 60 percent, due primarily to the items discussed above.

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Discovery Producer Services
     Discovery is accounted for using the equity method of accounting. As such, our interest in Discovery’s net operating results is reflected as equity earnings in the Consolidated Statements of Income. Due to the significance of Discovery’s equity earnings to our results of operations, the following discussion addresses in greater detail the results of operations for 100 percent of Discovery.
                 
    Three months ended  
    March 31,  
    2006     2005  
    (Thousands)  
Revenues
  $ 62,120     $ 27,289  
 
               
Costs and expenses, including interest:
               
Product cost and shrink replacement
    41,550       11,124  
Operating and maintenance expense
    4,822       3,993  
General and administrative expense
    690       500  
Depreciation and accretion
    6,379       6,113  
Interest income
    (626 )     (284 )
Other (income) expense, net
    (147 )     312  
 
           
 
               
Total costs and expenses, including interest
    52,668       21,758  
 
           
 
               
Net income
  $ 9,452     $ 5,531  
 
           
 
               
Williams Partners’ 40 percent interest - Equity earnings per our Consolidated Statements of Income
  $ 3,781     $ 2,212  
 
           
Three months ended March 31, 2006 vs. three months ended March 31, 2005
     Revenues increased $34.8 million, or 128 percent, due primarily to higher NGL product sales from marketing of customers’ NGLs. In addition, the Tennessee Gas Pipeline (“TGP”) and Texas Eastern Transmission Company (“TETCO”) open seasons, which began in the last quarter of 2005, accounted for $9.9 million in revenues. Throughput volumes from TETCO’s open season ended on March 14, 2006, and throughput volumes from TGP’s open season have substantially decreased and may cease soon. The significant components of the revenue increase are addressed more fully below.
    Product sales increased $36.8 million for NGL sales related to third-party processing customers’ elections to have Discovery market their NGLs for a fee under an option in their contracts. These sales were offset by higher associated product costs of $36.8 million discussed below.
 
    Processing and fractionation revenues increased $5.6 million including $6.7 million in additional fee-based revenues related to the TGP and TETCO open seasons discussed above and $0.8 million increased volumes from the Front Runner prospect, partially offset by normal reservoir declines.
 
    Transportation revenue increased $2.1 million including $3.2 million in additional fee-based revenues related to the TGP and TETCO open seasons discussed above, partially offset by $1.0 million related to normal reservoir declines.

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Partially offsetting these increases were the following:
    Product sales decreased approximately $8.5 million as a result of 60 percent lower NGL sales volumes following Hurricanes Katrina and Rita, partially offset by a $1.8 million increase associated with 32 percent higher average sales prices.
 
    Product sales also decreased $0.9 million due to the absence of excess fuel and shrink replacement gas sales in 2006.
 
    Gathering revenues decreased $2.1 million due primarily to a $1.4 million deficiency payment received in the first quarter of 2005.
     Product cost and shrink replacement increased $30.4 million, from $11.1 million in 2005, due primarily to $36.8 million of product purchase costs for customers who elected to have Discovery market their NGLs and $1.4 million from higher average per-unit natural gas prices, partially offset by $6.3 million lower costs related to reduced processing activity in 2006.
     Other operating and maintenance expense increased $0.8 million, or 21 percent, due primarily to $0.6 million higher processing costs related to increased throughput volumes and $0.2 million higher property insurance costs in 2006 following the 2005 hurricanes.
     General and administrative expense increased $0.2 million, or 38 percent, due primarily to an increase in the management fee paid to Williams related to Discovery’s market expansion project and additions of other facilities.
     Depreciation and accretion expense increased $0.3 million, or 4 percent, due primarily to the addition of market expansion assets.
     Interest income increased $0.3 million due primarily to interest earned on the restricted cash balance for the Tahiti project.
     Other (income) expense, net improved $0.5 million due primarily to a non-cash foreign currency transaction gain from the revaluation of restricted cash accounts denominated in Euros. These restricted cash accounts were established from contributions made by Discovery’s members, including us, for the construction of the Tahiti pipeline lateral expansion project.
     Net income increased $3.9 million, or 71 percent, due primarily to the TGP and TETCO open seasons which contributed approximately $8.2 million. This was largely offset by $1.1 million lower gross processing margins and $0.7 million lower gathering revenues related to lower volumes following the hurricanes, the absence of a $1.4 million deficiency payment received in 2005 and $1.1 million higher operating and maintenance and general and administrative expenses.
Outlook
     At March 31, 2006, Williams had an insurance receivable of $965,000 for costs incurred to assess property damage caused by Hurricane Ivan in 2004 to the Carbonate Trend pipeline. Although Williams believes these costs to be recoverable under its property damage insurance, it has not received approval from its insurer and it is reasonably possible that the insurer will deny some or all of this claim. If Williams’ is unable to recover these costs from insurance we will recognize a loss for these costs as they relate to the Carbonate Trend pipeline. This loss will be fully allocated to our general partner.
     Additionally, we currently estimate that we will incur $3.4 million to $4.6 million of maintenance expenditures for Carbonate Trend during 2006 and 2007 for restoration activities related to the partial erosion of the pipeline overburden caused by Hurricane Ivan in September 2004. Under an omnibus agreement, Williams agreed to reimburse us for the cost of these restoration activities. In connection with these restoration activities, the Carbonate Trend pipeline may experience a temporary shut down. We estimate that this shut down could reduce our cash flows from operations, excluding the maintenance expenditures, by approximately $200,000 to $300,000.

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     Throughput volumes on Discovery’s pipeline system and our Carbonate Trend pipeline are an important component of maximizing our profitability. Pipeline throughput volumes from existing wells connected to our pipelines will naturally decline over time. Accordingly, to maintain or increase throughput levels on these pipelines and the utilization rate of Discovery’s natural gas plant and fractionator, we and Discovery must continually obtain new supplies of natural gas.
    In 2006, recompletions and workovers may not offset production declines from the wells currently connected to the Carbonate Trend pipeline.
 
    Throughput volumes for Discovery resulting from the TETCO open season ended on March 14, 2006. Currently Discovery continues to receive reduced throughput volumes from TGP. Discovery is negotiating for the retention of some of this gas on a long-term basis and will compete with several other plants in the area for this business.
 
    We anticipate lower gathered volumes from Discovery’s pre-hurricane sources throughout 2006. The 2005 hurricanes caused a significant disruption in the normal operations of our customers including critical recompletion and drilling activity necessary to sustain and improve their production levels.
 
    With the current oil and natural gas price environment, drilling activity across the shelf and the deepwater of the Gulf of Mexico has been robust. However, the availability of specialized rigs necessary to drill in the deepwater areas, such as those in and around Discovery’s gathering areas, limits the ability of producers to bring identified reserves to market quickly. This will prolong the timeframe over which these reserves will be developed. We expect Discovery to be successful in competing for a portion of these new volumes.
 
    On March 31, 2006, Discovery connected a new well in ATP’s Gomez prospect, with initial volume of approximately 13,000 million British Thermal Units per day (“MMBtu/d”) and may increase to approximately 50,000 MMBtu/d by Fall 2006.
 
    We anticipate a significant increase in Discovery’s property damage insurance premiums, which are due in October 2006. The expected increase is related to an overall increase in premiums for property located in the Gulf Coast area following the 2005 hurricanes.
Results of operations – NGL Services
     The NGL Services segment includes our three NGL storage facilities near Conway, Kansas and our undivided 50 percent interest in the Conway fractionator.
                 
    Three months ended  
    March 31,  
    2006     2005  
    (Thousands)  
Segment revenues
  $ 16,330     $ 10,489  
 
               
Costs and expenses:
               
Operating and maintenance expense
    7,449       5,621  
Product cost
    5,723       2,735  
Depreciation and accretion
    600       605  
General and administrative expense — direct
    301       203  
Taxes other than income
    207       192  
 
           
 
               
Total costs and expenses
    14,280       9,356  
 
           
 
               
Segment profit
  $ 2,050     $ 1,133  
 
           

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Three months ended March 31, 2006 vs. three months ended March 31, 2005
     Segment revenues increased $5.8 million, or 56 percent, due primarily to higher product sales, fractionation and storage revenues. The significant components of the revenue increase are addressed more fully below:
    Product sales were $3.2 million higher due primarily to the sale of normal butane and propylene. The $2.0 million increase in normal butane resulted from the sale of product that was previously purchased for operating supply at our storage facilities. The $1.1 million increase in propylene sales resulted from a loss allowance retained from the unloading of railcars. This volume accumulated in 2004 and 2005. This increase was largely offset by the related increase in Product cost.
 
    Fractionation revenues increased $1.5 million due primarily to a 35 percent increase in the average fractionation rate related to the pass through to customers of increased fuel and power costs and 21 percent higher volumes in the first three months of 2006 compared to the first three months of 2005. The increased fractionation volumes are a result of increased customer throughput in anticipation of a scheduled turnaround in April 2006 and the elimination of Conway’s backlogged product at the storage facility.
 
    Storage revenues increased $0.7 million due primarily to higher average per-unit storage rates for the 2005-2006 term and higher storage volumes from additional short-term storage leases caused by the reduced demand for propane due to the unusually warm temperatures in the early winter months of 2006.
 
    Other revenues increased $0.4 million due to increased butane conversion revenue and increased terminaling revenue.
     The following table summarizes the major components of operating and maintenance expense which are discussed in detail below.
                 
    Three months ended  
    March 31,  
    2006     2005  
    (Thousands)  
Operating and maintenance expense:
               
Salaries and benefits
  $ 701     $ 661  
Outside services and other
    3,492       1,555  
Fuel and power
    3,658       2,268  
Product imbalance expense (income)
    (402 )     1,137  
 
           
 
               
Total operating and maintenance expense
  $ 7,449     $ 5,621  
 
           
    Outside services and other increased $1.9 million due primarily to increased storage cavern workovers to meet KDHE requirements.
 
    Fuel and power costs increased $1.4 million due primarily to:
    $0.5 million higher average cost due to a 23 percent increase in the price of natural gas;
 
    $0.4 million higher average cost associated with a long-term physical natural gas contract; and
 
    $0.4 million increase due to a 19 percent increase in the consumption of natural gas associated with higher fractionated volumes.

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    Product imbalance expense (income) had a favorable change of $1.5 million due primarily to:
    $1.2 million of gains recognized from the management of the fractionation process to optimize the resulting mix of products which typically results in surplus propane volumes and deficit ethane volumes; and
 
    $0.8 million lower product imbalance valuation adjustments.
          Partially offsetting these increases are $0.6 million of losses from cavern empties.
     Product cost increased $3.0 million, or 109 percent, directly related to increased sales of surplus propylene and normal butane volumes discussed above.
     Segment profit increased $0.9 million, or 81 percent, due primarily to the $2.2 million higher storage and fractionation revenues, $0.4 million higher other revenues and $0.3 million higher product sales margins, largely offset by $1.9 million higher operating and maintenance expense.
Outlook
     For the second quarter of 2006, fractionation volumes will decrease due to scheduled maintenance activities to ensure mechanical integrity. After this maintenance is completed we expect to average throughput of 42,000 barrels per day. We also expect to continue to produce income from the blending and segregation of various products.
     The early results of the 2006 storage season are positive. During the first quarter of 2006, we received storage volume nominations for the storage year beginning April 1, 2006 that would generate revenues equal to last year’s record levels. There is still potential for additional short term storage leases later in 2006.
     We continue to have a high level of storage cavern workovers and wellhead modifications to comply with KDHE regulatory requirements. We expect outside service costs to continue at high levels throughout 2006 and 2007 to ensure that we meet the regulatory compliance requirement to complete cavern workovers before the end of 2008.
Financial Condition and Liquidity
Outlook for 2006
     We believe we have, or have access to, the financial resources and liquidity necessary to meet future requirements for working capital, capital and investment expenditures, and quarterly cash distributions. We anticipate our 2006 sources of liquidity will include:
    The issuance of common units contemplated in our Form S-1 filed on April 7, 2006;
 
    The issuance of senior notes in a private placement concurrent with the common unit offering;
 
    Cash and cash equivalents;
 
    Cash generated from operations;
 
    Cash distributions from Discovery and Four Corners;
 
    Capital contributions from Williams pursuant to an omnibus agreement; and
 
    Credit facilities, as needed.
     We anticipate our more significant 2006 capital requirements to be:
    Acquisition of a 25.1 percent interest in Four Corners;
 
    Maintenance capital expenditures for our Conway assets;
 
    Capital contributions to Discovery for its capital expenditure program; and
 
    Minimum quarterly distributions to our unitholders.

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Discovery
     Discovery expects to make quarterly distributions of available cash to its members. Accordingly, on April 28, 2006, pursuant to the terms of its limited liability company agreement, Discovery made a $9.0 million distribution of available cash to its members. Our 40 percent share of this distribution was $3.6 million.
     In 2005, Discovery sustained damages from Hurricane Katrina that exceeded its $1.0 million insurance deductible. Discovery estimates the total cost for hurricane-related repairs will be approximately $5.8 million, $4.8 million in excess of its deductible. Discovery will fund these repairs with cash flows from operations and then seek reimbursement from its insurance carrier. The insurance receivable at March 31, 2006 was $3.9 million.
     We expect future cash requirements for Discovery relating to working capital and maintenance capital expenditures to be funded from its own internally generated cash flows from operations. Growth or expansion capital expenditures for Discovery will be funded either by cash calls to its members, which requires unanimous consent of the members except in limited circumstances, or from internally generated funds.
Capital Contributions from Williams
     Capital contributions from Williams including amounts required under the omnibus agreement consist of the following:
    Indemnification of environmental and related expenditures for a period of three years (for certain of those expenditures) up to $14 million, which includes between $3.4 million and $4.6 million for the restoration activities due to the partial erosion of the Carbonate Trend pipeline overburden by Hurricane Ivan, approximately $3.1 million for capital expenditures related to KDHE-related cavern compliance at our Conway storage facilities, and approximately $1.0 million for our 40 percent share of Discovery’s costs for marshland restoration and repair or replacement of Paradis’ emission-control flare.
 
    An annual credit for general and administrative expenses of $3.2 million in 2006, $2.4 million in 2007, $1.6 million in 2008 and $0.8 million in 2009.
 
    Up to $3.4 million to fund our 40 percent share of the expected total cost of Discovery’s Tahiti pipeline lateral expansion project in excess of the $24.4 million we contributed during September 2005.
 
    Capital contributions from Williams of approximately $1.0 million for expensed KDHE-related compliance work at our Conway storage facilities.
     Credit Facilities
     We may borrow up to $75 million under Williams’ $1.275 billion revolving credit facility, which is available for borrowings and letters of credit. Borrowings under this facility mature on May 3, 2007. Our $75 million borrowing limit under Williams’ revolving credit facility is available for general partnership purposes, including acquisitions, but only to the extent that sufficient amounts remain unborrowed by Williams and its other subsidiaries. At March 31, 2006, letters of credit totaling $102 million had been issued on behalf of Williams by the participating institutions under this facility and no revolving credit loans were outstanding. This facility was replaced in May 2006 with a similar facility of $1.5 billion that matures in May 2009, under which we are allowed to borrow up to $75 million.
     We also have a $20 million revolving credit facility with Williams as the lender. The facility is available exclusively to fund working capital borrowings. Borrowings under the facility will mature on May 3, 2007. We are required to reduce 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. For the three months ended March 31, 2006 we had no borrowings under the working capital credit facility.

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Capital Requirements
     The natural gas gathering, 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; and
 
    Expansion capital expenditures such as those 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.
     We estimate that maintenance capital expenditures for the Conway assets will be approximately $8.3 million for 2006. Of this amount, approximately $2.3 million will be reimbursed by Williams subject to an omnibus agreement. This omnibus agreement includes a three-year limitation from the IPO closing date, August 23, 2005, and an overall omnibus agreement limitation of $14.0 million.
     We estimate that maintenance capital expenditures for 100 percent of Discovery will be approximately $2.3 million for 2006. We expect Discovery will fund its maintenance capital expenditures through its cash flows from operations.
     We estimate that expansion capital expenditures for 100 percent of Discovery will be approximately $30.8 million for 2006. These expenditures are primarily for the ongoing construction of the Tahiti pipeline lateral expansion project. Discovery will fund these expenditures with amounts previously escrowed for this project.
Working Capital Attributable to Deferred Revenues
     We require cash in order to continue providing services to our storage customers who prepay their annual storage contracts in April of each year. The storage year for a majority of customer contracts at our Conway storage facility runs from April 1 of a year to March 31 of the following year. For most of these agreements we receive payment for these one-year contracts in advance in April after the beginning of the storage year and recognize the associated revenue over the course of the storage year. As of March 31, 2006, our deferred storage revenue is $0.2 million.
Cash Distributions to Unitholders
     We paid a quarterly distribution of $5.0 million ($.35 per unit) to common and subordinated unitholders and the general partner interest on February 14, 2006. We intend to make a quarterly distribution each quarter during 2006, including $5.4 million ($0.38 per unit) on May 15, 2006 to the general partner interest and common and subordinated unitholders of record at the close of business on May 8, 2006.
Results of Operations — Cash Flows
     Williams Partners L.P.
                 
    Three months ended  
    March 31,  
    2006     2005  
    (Thousands)  
Net cash provided (used) by operating activities
  $ 2,395     $ (4,055 )
 
               
Net cash used by investing activities
  $ (1,165 )   $ (212 )
 
               
Net cash provided (used) by financing activities
  $ (3,754 )   $ 4,267  

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     The $6.5 million increase in net cash provided by operating activities for the first three months of 2006 as compared to the first three months of 2005 is due primarily to:
    $4.4 million increase in distributed earnings from Discovery; and
 
    $2.8 million in lower interest expense due to the forgiveness by Williams of advances to us at the closing of our IPO.
     Net cash used by investing activities includes maintenance capital expenditures in our NGL Services segment primarily for the installation of cavern liners and KDHE-related cavern compliance with the installation of wellhead control equipment and well meters.
     Net cash used by financing activities in 2006 includes $5.0 million of distributions paid to unitholders partially offset by $1.2 million in indemnifications and reimbursements received from Williams pursuant to the omnibus agreement. Net cash provided by financing activities in the first three months of 2005 represent net cash flows passed through to Williams, prior to the IPO on August 23, 2005, under its cash management program.
     Discovery — 100 percent
     As previously disclosed, cash distributions from Discovery will be a significant source of our liquidity. Due to the significance of Discovery’s cash flows to our ability to make cash distributions, the following discussion addresses in greater detail the cash flow activities for 100 percent of Discovery for the three months ended March 31, 2006 and 2005.
                 
    Three months ended  
    March 31,  
    2006     2005  
    (Thousands)  
Operating Activities:
               
Net income
  $ 9,452     $ 5,531  
Adjustments to reconcile to cash provided by operations:
               
Depreciation and accretion
    6,379       6,113  
Cash provided (used) by changes in assets and liabilities
    2,684       (3,663 )
 
           
 
               
Net cash provided by operating activities
    18,515       7,981  
 
               
Investing Activities:
               
Property, plant and equipment:
               
Capital expenditures
    (2,546 )     (3,638 )
Change in accounts payable — capital expenditures
    454       (3,459 )
Decrease in restricted cash
    2,700        
 
           
 
               
Net cash provided (used) by investing activities
    608       (7,097 )
 
               
Financing Activities:
               
Contributions from members
    7,383        
Distributions to members
    (13,598 )      
 
           
 
               
Net cash used by financing activities
    (6,215 )      
 
           
 
               
Net increase in cash and cash equivalents
  $ 12,908     $ 884  
 
           
     Net cash provided by operating activities increased $10.5 million in 2006 as compared to 2005 due primarily to a $4.2 million increase in operating income, adjusted for non-cash expenses, and a $6.3 million increase in cash from changes in working capital. The $6.3 million increase in cash from changes in working capital resulted

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primarily from the payment, in the first quarter of 2005, of an extra month of liquid sales invoices outstanding at the end of 2004.
     Net cash provided by investing activities increased $7.7 million in 2006 as compared to 2005 due to higher capital expenditures in 2005 related primarily to capital expenditures for Discovery’s market expansion project and for the purchase of leased compressors at the Larose processing plant. Capital expenditures in 2006 related primarily to the Tahiti pipeline lateral expansion project, which were funded from amounts previously escrowed and included on the balance sheet as restricted cash.
     Net cash used by financing activities in 2006 includes:
    $13.6 million of distributions paid to members, including a regular quarterly distribution of $11.0 million; partially offset by
 
    $7.4 million of capital contributions from members for the construction of the Tahiti pipeline lateral expansion.
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 risk to which we are exposed is commodity price risk for natural gas and NGLs.
Commodity Price Risk
     Certain of Discovery’s processing contracts are exposed to the impact of price fluctuations in the commodity markets, including the correlation between natural gas and NGL prices. In addition, price fluctuations in commodity markets could impact the demand for Discovery’s services in the future. Carbonate Trend and our fractionation and storage operations are not directly affected by changing commodity prices except for product imbalances, which are exposed to the impact of price fluctuation in NGL markets. Price fluctuations in commodity markets could also impact the demand for storage and fractionation services in the future. In connection with the IPO, Williams transferred to us a gas purchase contract for the purchase of a portion of our fuel requirements at the Conway fractionator at a market price not to exceed a specified level. This physical contract is intended to mitigate the fuel price risk under one of our fractionation contracts which contains a cap on the per-unit fee that we can charge, at times limiting our ability to pass through the full amount of increases in variable expenses to that customer. This physical contract is a derivative. However, we elected to account for this contract under the normal purchases exemption to the fair value accounting that would otherwise apply. We and Discovery do not currently use any other derivatives to manage the risks associated with these price fluctuations.
Item 4. Controls and Procedures
     An evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15(d) — 15(e) of the Securities Exchange Act) (“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 general partner’s 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.
     Our management, including our general partner’s chief executive officer and chief financial officer, does not expect that our 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 the company 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

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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.
     There were no changes in our internal controls over financial reporting that occurred during the fiscal quarter ended March 31, 2006 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
PART II— OTHER INFORMATION
Item 1. Legal Proceedings
     The information required for this item is provided in Note 5, 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 5. Other Information
     On May 1, 2006 we entered into a three year credit agreement among The Williams Companies, Inc. (“Williams”), Northwest Pipeline Corporation, Transcontinental Gas Pipe Line Corporation, the several lenders from time to time parties thereto, and Citibank, N.A., as administrative agent (the “Credit Agreement”). This $1.5 billion revolving credit facility is available for borrowings and letters of credit and allows us to borrow up to $75 million for general partnership purposes, including acquisitions, but only to the extent that sufficient amounts remain unborrowed by Williams and its other subsidiaries.
     Our borrowings under the Credit Agreement would bear interest at a variable interest rate based on either LIBOR or a base rate, in either case plus an applicable margin that varies depending upon the rating of Williams’ senior unsecured long-term debt.
     The Credit Agreement contains a number of restrictions on the borrowers’ business, including, but not limited to, restrictions on certain of the borrowers’ and certain of the borrowers’ other subsidiaries’ ability, but not our ability, to grant liens on assets, merge, consolidate, or sell assets; incur indebtedness; engage in transactions with related parties; and make distributions on equity interests. In addition, Williams is at certain times subject to a minimum ratio of consolidated EBITDA to interest expense financial maintenance covenant. The Credit Agreement also contains affirmative covenants and events of default. Failure to comply with these covenants, or the occurrence of an event of default, could result in acceleration of the borrowers’ debt and other financial obligations under the Credit Agreement.
     Also on May 1, 2006, the previous credit agreement dated as of May 20, 2005 among us, Williams, Northwest Pipeline Corporation, Transcontinental Gas Pipe Line Corporation, Citibank, N.A., Bank of America, N.A., and Citicorp USA, INC. as administrative agent was terminated. This previous agreement contained similar terms with respect to us as the new Credit Agreement referenced above. At closing, letters of credit totaling $235 million that had been issued on behalf of Williams by the participating institutions under the predecessor facility were reissued under the new facility described above, and no revolving credit loans were outstanding.
Relationships
     We are an indirect subsidiary of Williams. As a result, certain individuals, including, officers and directors of our general partner, serve as officers and/or directors of more than one of such entities.

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Item 6. Exhibits
     The exhibits listed below are filed or furnished as part of this report:
         
Exhibit        
Number       Description
*# Exhibit 2
    Purchase and Sale agreement, dated April 6, 2006, by and among Williams Energy Services, LLC, Williams Field Services Group, LLC, Williams Field Services Company, LLC, Williams Partners GP LLC, Williams Partners L.P. and Williams Partners Operating LLC (attached as Exhibit 2.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-32599) filed with the SEC on April 7, 2006.
*Exhibit 10
    Credit agreement dated as of May 1, 2006 among Williams Partners L.P., The Williams Companies, Inc., Northwest Pipeline Corporation, Transcontinental Gas Pipeline Corporation, and Citibank, N.A., as administrative agent (attached as Exhibit 10.1 to The Williams Companies, Inc’s current report on Form 8-K (File No. 001-04174) filed with the SEC on May 1, 2006).
+Exhibit 31.1
    Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer.
+Exhibit 31.2
    Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer.
+Exhibit 32
    Section 1350 Certifications of Chief Executive Officer and Chief Financial Officer.
 
*   Such exhibit has heretofore been filed with the SEC as part of the filing indicated and is incorporated herein by reference.
 
#   Pursuant to Item 601(b)(2) of Regulation S-K, the registrant agrees to furnish supplementally a copy of any omitted exhibit or schedule to the SEC upon request.
 
+   Filed herewith

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SIGNATURE
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.    
 
       
 
       
 
  By: Williams Partners GP LLC, its general partner    
 
       
 
  /s/ Ted T. Timmermans    
 
       
 
       
 
  Ted. T. Timmermans    
 
  Controller (Duly Authorized Officer and Chief Accounting Officer)    
May 2, 2006

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EXHIBIT INDEX
         
Exhibit        
Number       Description
*# Exhibit 2
    Purchase and Sale agreement, dated April 6, 2006, by and among Williams Energy Services, LLC, Williams Field Services Group, LLC, Williams Field Services Company, LLC, Williams Partners GP LLC, Williams Partners L.P. and Williams Partners Operating LLC (attached as Exhibit 2.1 to Williams Partners L.P.’s current report on Form 8-K (File No. 001-32599) filed with the SEC on April 7, 2006.
*Exhibit 10
    Credit agreement dated as of May 1, 2006 among Williams Partners L.P., The Williams Companies, Inc., Northwest Pipeline Corporation, Transcontinental Gas Pipeline Corporation, and Citibank, N.A., as administrative agent (attached as Exhibit 10.1 to The Williams Companies, Inc’s current report on Form 8-K (File No. 001-04174) filed with the SEC on May 1, 2006).
+Exhibit 31.1
    Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer.
+Exhibit 31.2
    Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer.
+Exhibit 32
    Section 1350 Certifications of Chief Executive Officer and Chief Financial Officer.
 
*   Such exhibit has heretofore been filed with the SEC as part of the filing indicated and is incorporated herein by reference.
 
#   Pursuant to Item 601(b)(2) of Regulation S-K, the registrant agrees to furnish supplementally a copy of any omitted exhibit or schedule to the SEC upon request.
 
+   Filed herewith

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