##### Table of Contents





UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549





Form 10-Q





(Mark One)

|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the quarterly period ended March 31, 2011

OR



| ̈ | 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 001-33147





Constellation Energy Partners LLC

(Exact Name of Registrant as Specified in Its Charter)







|                                            |  |                                     
|------------------------------------------- |  | ------------------------------------
|Delaware                                    |  | 11-3742489                          
|(State of organization)                     |  | (I.R.S. Employer Identification No.)
|1801 Main Street, Suite 1300 Houston, Texas |  | 77002                               
|(Address of Principal Executive Offices)    |  | (Zip Code)                          

Telephone
Number: (832) 308-3700





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

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 for such shorter period that the registrant was required to submit and post such
files).    Yes   ̈    No   ̈

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.



|                        |  |                                                  |  |                           |  |  
|----------------------- |  | ------------------------------------------------ |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈                                                |  | Accelerated filer         |  |  ̈
|                        |  |                                                  | 
|Non-accelerated filer   |  |  ̈  (Do not check if a smaller reporting company) |  | Smaller reporting company |  | x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).    Yes   ̈    No  x

Indicate the number of shares outstanding of each of the registrants classes of common stock, as of the latest practicable date.

Common Units outstanding on May 6, 2011: 23,788,300 units.









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##### Table of Contents

TABLE OF CONTENTS



|                             |  |                                                                                       |    |      |    | 
|---------------------------- |  | ------------------------------------------------------------------------------------- | -- | ---- | -- | 
|                             |  |                                                                                       |    | Page |   
|                             | 
|PART IFinancial Information |  |                                                                                       | 3  |     
|                             |  |                                                                                      
|Item 1.                      |  | Financial Statements                                                                  |    |      | 3  | 
|                             |  | Consolidated Statements of Operations and Comprehensive Income (Loss)                 |    |      | 3  | 
|                             |  | Consolidated Balance Sheets                                                           |    |      | 4  | 
|                             |  | Consolidated Statements of Cash Flows                                                 |    |      | 5  | 
|                             |  | Consolidated Statements of Changes in Members Equity                                 |    |      | 6  | 
|                             |  | Notes to Consolidated Financial Statements                                            |    |      | 7  | 
|                             |  |                                                                                      
|Item 2.                      |  | Managements Discussion and Analysis of Financial Condition and Results of
Operations |    |      | 19 | 
|                             |  |                                                                                      
|                             |  | Results of Operations                                                                 |    |      | 23 | 
|                             |  |                                                                                      
|                             |  | Liquidity and Capital Resources                                                       |    |      | 26 | 
|                             |  |                                                                                      
|Item 3.                      |  | Quantitative and Qualitative Disclosures About Market Risk                            |    |      | 34 | 
|                             |  |                                                                                      
|Item 4.                      |  | Controls and Procedures                                                               |    |      | 36 | 
|                             | 
|PART IIOther Information    |  |                                                                                       | 36 |     
|                             |  |                                                                                      
|Item 1.                      |  | Legal Proceedings                                                                     |    |      | 36 | 
|                             |  |                                                                                      
|Item 1A.                     |  | Risk Factors                                                                          |    |      | 37 | 
|                             |  |                                                                                      
|Item 2.                      |  | Unregistered Sales of Equity Securities and Use of Proceeds                           |    |      | 38 | 
|                             |  |                                                                                      
|Item 3.                      |  | Defaults Upon Senior Securities                                                       |    |      | 38 | 
|                             |  |                                                                                      
|Item 4.                      |  | Reserved                                                                              |    |      | 38 | 
|                             |  |                                                                                      
|Item 5.                      |  | Other Information                                                                     |    |      | 38 | 
|                             |  |                                                                                      
|Item 6.                      |  | Exhibits                                                                              |    |      | 39 | 
|                             | 
|Signatures                   |  |                                                                                       | 40 |     



2



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##### Table of Contents

PART IFINANCIAL INFORMATION



|Item 1. | Financial Statements
|------- | --------------------

CONSTELLATION ENERGY PARTNERS LLC and SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Income (Loss)

(Unaudited)



|                                                                        |  |                             |            |   |                             |   |            |  
|----------------------------------------------------------------------- |  | --------------------------- | ---------- | - | --------------------------- | - | ---------- | -
|                                                                        |  | Three months endedMarch 31, |            |   | Three months endedMarch 31, |  
|                                                                        |  | 2011                        |            |   | 2010                        |  
|                                                                        |  | (In 000s except unit data) |           
|                                                                        |  |                            
|Revenues                                                                |  |                             |            |   |                             |   |            |  
|Natural gas sales                                                       |  | $                           | 23,832     |   |                             | $ | 28,165     |  
|Oil and liquids sales                                                   |  |                             | 2,081      |   |                             |   | 1,072      |  
|Gain / (Loss) from mark-to-market activities (see Note 4)               |  |                             | (10,109    | ) |                             |   | 35,281     |  
|                                                                        |  |                             |            |   |                             |   |            |  
|Total revenues                                                          |  |                             | 15,804     |   |                             |   | 64,518     |  
|Expenses:                                                               |  |                             |            |   |                             |   |            |  
|Operating expenses:                                                     |  |                             |            |   |                             |   |            |  
|Lease operating expenses                                                |  |                             | 7,420      |   |                             |   | 7,963      |  
|Cost of sales                                                           |  |                             | 519        |   |                             |   | 772        |  
|Production taxes                                                        |  |                             | 771        |   |                             |   | 1,125      |  
|General and administrative                                              |  |                             | 4,223      |   |                             |   | 5,062      |  
|Exploration costs                                                       |  |                             | 131        |   |                             |   | 223        |  
|(Gain) / Loss on sale of assets                                         |  |                             | 7          |   |                             |   | (8         | )
|Depreciation, depletion and amortization                                |  |                             | 5,865      |   |                             |   | 27,248     |  
|Accretion expense                                                       |  |                             | 226        |   |                             |   | 207        |  
|                                                                        |  |                             |            |   |                             |   |            |  
|Total operating expenses                                                |  |                             | 19,162     |   |                             |   | 42,592     |  
|Other expense / (income)                                                |  |                             |            |   |                             |   |            |  
|Interest expense                                                        |  |                             | 2,523      |   |                             |   | 3,539      |  
|Interest expense-(Gain)/Loss from mark-to-market activities(see Note 4) |  |                             | (670       | ) |                             |   | 517        |  
|Interest (income)                                                       |  |                             | (1         | ) |                             |   |           |  
|Other expense (income)                                                  |  |                             | (58        | ) |                             |   | (188       | )
|                                                                        |  |                             |            |   |                             |   |            |  
|Total other expenses / (income)                                         |  |                             | 1,794      |   |                             |   | 3,868      |  
|                                                                        |  |                             |            |   |                             |   |            |  
|Total expenses                                                          |  |                             | 20,956     |   |                             |   | 46,460     |  
|                                                                        |  |                             |            |   |                             |   |            |  
|Net income (loss)                                                       |  | $                           | (5,152     | ) |                             | $ | 18,058     |  
|Other comprehensive income (loss)                                       |  |                             | (700       | ) |                             |   | (5,286     | )
|                                                                        |  |                             |            |   |                             |   |            |  
|Comprehensive income (loss)                                             |  | $                           | (5,852     | ) |                             | $ | 12,772     |  
|                                                                        |  |                             |            |   |                             |   |            |  
|Earnings (loss) per unit (see Note 2)                                   |  |                             |            |   |                             |   |            |  
|Earnings (loss) per unitBasic                                          |  | $                           | (0.21      | ) |                             | $ | 0.75       |  
|Units outstandingBasic                                                 |  |                             | 24,309,448 |   |                             |   | 24,002,372 |  
|Earnings (loss) per unitDiluted                                        |  | $                           | (0.21      | ) |                             | $ | 0.75       |  
|Units outstandingDiluted                                               |  |                             | 24,309,448 |   |                             |   | 24,002,372 |  
|Distributions declared and paid per unit                                |  | $                           |           |   |                             | $ |           |  

See accompanying notes
to consolidated financial statements.



3



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CONSTELLATION ENERGY PARTNERS LLC and SUBSIDIARIES

Consolidated Balance Sheets

(Unaudited)



|                                                                                                                                             |  |                |          |   |                   |   |          |  
|-------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------- | -------- | - | ----------------- | - | -------- | -
|                                                                                                                                             |  | March 31, 2011 |          |   | December 31, 2010 |  
|                                                                                                                                             |  | (In 000s)     |         
|ASSETS                                                                                                                                       |  |                |          |   |                   |   |          |  
|Current assets                                                                                                                               |  |                |          |   |                   |   |          |  
|Cash and cash equivalents                                                                                                                    |  | $              | 7,006    |   |                   | $ | 7,892    |  
|Accounts receivable                                                                                                                          |  |                | 7,330    |   |                   |   | 7,371    |  
|Prepaid expenses                                                                                                                             |  |                | 1,072    |   |                   |   | 1,315    |  
|Risk management assets (see Note 4)                                                                                                          |  |                | 33,533   |   |                   |   | 36,513   |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Total current assets                                                                                                                         |  |                | 48,941   |   |                   |   | 53,091   |  
|Oil and natural gas properties (See Note 6)                                                                                                  |  |                |          |   |                   |   |          |  
|Oil and natural gas properties, equipment and facilities                                                                                     |  |                | 775,732  |   |                   |   | 774,060  |  
|Material and supplies                                                                                                                        |  |                | 2,080    |   |                   |   | 2,073    |  
|Less accumulated depreciation, depletion, amortization, and impairments                                                                      |  |                | (504,979 | ) |                   |   | (499,214 | )
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Net oil and natural gas properties                                                                                                           |  |                | 272,833  |   |                   |   | 276,919  |  
|Other assets                                                                                                                                 |  |                |          |   |                   |   |          |  
|Debt issue costs (net of accumulated amortization of $5,380 at March 31, 2011 and$4,888 at December 31,
2010)                                |  |                | 3,245    |   |                   |   | 3,727    |  
|Risk management assets (see Note 4)                                                                                                          |  |                | 39,875   |   |                   |   | 46,986   |  
|Other non-current assets                                                                                                                     |  |                | 3,525    |   |                   |   | 3,654    |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Total assets                                                                                                                                 |  | $              | 368,419  |   |                   | $ | 384,377  |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|LIABILITIES AND MEMBERS EQUITY                                                                                                              |  |                |          |   |                   |   |          |  
|Liabilities                                                                                                                                  |  |                |          |   |                   |   |          |  
|Current liabilities                                                                                                                          |  |                |          |   |                   |   |          |  
|Accounts payable                                                                                                                             |  | $              | 1,686    |   |                   | $ | 1,418    |  
|Accrued liabilities                                                                                                                          |  |                | 7,269    |   |                   |   | 10,369   |  
|Royalty payable                                                                                                                              |  |                | 2,485    |   |                   |   | 2,605    |  
|Risk management liabilities (see Note 4)                                                                                                     |  |                | 187      |   |                   |   | 141      |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Total current liabilities                                                                                                                    |  |                | 11,627   |   |                   |   | 14,533   |  
|Other liabilities                                                                                                                            |  |                |          |   |                   |   |          |  
|Asset retirement obligation                                                                                                                  |  |                | 13,247   |   |                   |   | 13,024   |  
|Debt                                                                                                                                         |  |                | 157,500  |   |                   |   | 165,000  |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Total other liabilities                                                                                                                      |  |                | 170,747  |   |                   |   | 178,024  |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Total liabilities                                                                                                                            |  |                | 182,374  |   |                   |   | 192,557  |  
|                                                                                                                                             |  |               
|Commitments and contingencies (See Note 8)                                                                                                   |  |                |          |   |                   |   |          |  
|                                                                                                                                             |  |               
|Class D Interests                                                                                                                            |  |                | 6,667    |   |                   |   | 6,667    |  
|                                                                                                                                             |  |               
|Members equity                                                                                                                              |  |                |          |   |                   |   |          |  
|Class A units, 485,476 and 487,750 shares authorized, issued and outstanding, respectively                                                   |  |                | 3,384    |   |                   |   | 3,485    |  
|Class B units, 24,124,378 and 24,298,763 shares authorized, respectively, and 23,788,300 and 23,899,758 issued and outstanding,
respectively |  |                | 165,774  |   |                   |   | 170,748  |  
|Accumulated other comprehensive income                                                                                                       |  |                | 10,220   |   |                   |   | 10,920   |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Total members equity                                                                                                                        |  |                | 179,378  |   |                   |   | 185,153  |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  
|Total liabilities and members equity                                                                                                        |  | $              | 368,419  |   |                   | $ | 384,377  |  
|                                                                                                                                             |  |                |          |   |                   |   |          |  

See accompanying notes to consolidated financial statements.



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CONSTELLATION ENERGY PARTNERS LLC and SUBSIDIARIES

Consolidated Statements of Cash Flows

(Unaudited)



|                                                                                     |  |                             |        |   |      |   |         |  
|------------------------------------------------------------------------------------ |  | --------------------------- | ------ | - | ---- | - | ------- | -
|                                                                                     |  | Three months endedMarch 31, |       
|                                                                                     |  | 2011                        |        |   | 2010 |  
|                                                                                     |  | (In 000s)                  |       
|Cash flows from operating activities:                                                |  |                             |        |   |      |   |         |  
|Net income (loss)                                                                    |  | $                           | (5,152 | ) |      | $ | 18,058  |  
|Adjustments to reconcile net income (loss) to cash provided by operating activities: |  |                             |        |   |      |   |         |  
|Depreciation, depletion and amortization                                             |  |                             | 5,865  |   |      |   | 27,248  |  
|Amortization of debt issuance costs                                                  |  |                             | 492    |   |      |   | 481     |  
|Accretion expense                                                                    |  |                             | 226    |   |      |   | 207     |  
|Equity (earnings) losses in affiliate                                                |  |                             | (95    | ) |      |   | (188    | )
|(Gain) Loss from disposition of property and equipment                               |  |                             | 7      |   |      |   | (8      | )
|(Gain) Loss from mark-to-market activities                                           |  |                             | 9,439  |   |      |   | (34,764 | )
|Unit-based compensation programs                                                     |  |                             | 373    |   |      |   | 437     |  
|Changes in Assets and Liabilities:                                                   |  |                             |        |   |      |   |         |  
|Change in net risk management assets and liabilities                                 |  |                             |       |   |      |   |        |  
|(Increase) decrease in accounts receivable                                           |  |                             | 41     |   |      |   | (540    | )
|(Increase) decrease in prepaid expenses                                              |  |                             | 289    |   |      |   | (429    | )
|(Increase) decrease in other assets                                                  |  |                             | (111   | ) |      |   | (2      | )
|Increase (decrease) in accounts payable                                              |  |                             | 268    |   |      |   | 1,449   |  
|Increase (decrease) in payable to affiliate                                          |  |                             |       |   |      |   | (182    | )
|Increase (decrease) in accrued liabilities                                           |  |                             | (3,386 | ) |      |   | (2,997  | )
|Increase (decrease) in royalty payable                                               |  |                             | (120   | ) |      |   | (716    | )
|                                                                                     |  |                             |        |   |      |   |         |  
|Net cash provided by operating activities                                            |  |                             | 8,136  |   |      |   | 8,054   |  
|                                                                                     |  |                             |        |   |      |   |         |  
|Cash flows from investing activities:                                                |  |                             |        |   |      |   |         |  
|Cash paid for acquisitions, net of cash acquired                                     |  |                             | 280    |   |      |   | (591    | )
|Development of natural gas properties                                                |  |                             | (1,596 | ) |      |   | (85     | )
|Proceeds from sale of equipment                                                      |  |                             | 16     |   |      |   | 6       |  
|Distributions from equity affiliate                                                  |  |                             | 130    |   |      |   | 75      |  
|                                                                                     |  |                             |        |   |      |   |         |  
|Net cash used in investing activities                                                |  |                             | (1,170 | ) |      |   | (595    | )
|                                                                                     |  |                             |        |   |      |   |         |  
|Cash flows from financing activities:                                                |  |                             |        |   |      |   |         |  
|Members distributions                                                               |  |                             |       |   |      |   |        |  
|Proceeds from issuance of debt                                                       |  |                             |       |   |      |   |        |  
|Repayment of debt                                                                    |  |                             | (7,500 | ) |      |   | (10,000 | )
|Units tendered by employees for tax withholdings                                     |  |                             | (296   | ) |      |   | (301    | )
|Equity issue costs                                                                   |  |                             | (46    | ) |      |   | (2      | )
|Debt issue costs                                                                     |  |                             | (10    | ) |      |   | (50     | )
|                                                                                     |  |                             |        |   |      |   |         |  
|Net cash (used in) provided by financing activities                                  |  |                             | (7,852 | ) |      |   | (10,353 | )
|                                                                                     |  |                             |        |   |      |   |         |  
|Net (decrease) increase in cash                                                      |  |                             | (886   | ) |      |   | (2,894  | )
|Cash and cash equivalents, beginning of period                                       |  |                             | 7,892  |   |      |   | 11,337  |  
|                                                                                     |  |                             |        |   |      |   |         |  
|Cash and cash equivalents, end of period                                             |  | $                           | 7,006  |   |      | $ | 8,443   |  
|                                                                                     |  |                             |        |   |      |   |         |  
|Supplemental disclosures of cash flow information:                                   |  |                             |        |   |      |   |         |  
|Change in accrued capital expenditures                                               |  | $                           | 219    |   |      | $ | 463     |  
|Cash received during the period for interest                                         |  | $                           | 1      |   |      | $ |        |  
|Cash paid during the period for interest                                             |  | $                           | (1,533 | ) |      | $ | (1,923  | )

See accompanying notes to
consolidated financial statements.



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CONSTELLATION ENERGY PARTNERS LLC and SUBSIDIARIES

Consolidated Statements of Changes in Members Equity

(Unaudited)



|                                                |  |                                  |         |         |        |   |                                            |   |        |                     |  |   |         |   |  |   |        |   |  |   |         |   |  | 
|----------------------------------------------- |  | -------------------------------- | ------- | ------- | ------ | - | ------------------------------------------ | - | ------ | ------------------- |  | - | ------- | - |  | - | ------ | - |  | - | ------- | - |  | 
|                                                |  | Class A                          |         | Class B |        |   | AccumulatedOtherComprehensiveIncome (Loss) |   |        | TotalMembersEquity | 
|                                                |  | Units                            |         |         | Amount |   | Units                                      |   | Amount |                     |  |  
|                                                |  | ( In 000s, except unit amounts) |        
|Balance, December 31, 2010                      |  |                                  | 487,750 |         |        | $ | 3,485                                      |   |        | 23,899,758          |  | $ | 170,748 |   |  | $ | 10,920 |   |  | $ | 185,153 |  
|Distributions                                   |  |                                  |        |         |        |   |                                           |   |        |                    |  |   |        |   |  |   |       |   |  |   |        |  
|Units tendered by employees for tax withholding |  |                                  | (2,094  | )       |        |   | (6                                         | ) |        | (102,581)           |  |   | (290    | ) |  |   |       |   |  |   | (296    | )
|Change in fair value of commodity hedges        |  |                                  |        |         |        |   |                                           |   |        |                    |  |   |        |   |  |   | 24     |   |  |   | 24      |  
|Cash settlement of commodity hedges             |  |                                  |        |         |        |   |                                           |   |        |                    |  |   |        |   |  |   | (724   | ) |  |   | (724    | )
|Unit-based compensations programs               |  |                                  | (180    | )       |        |   | 7                                          |   |        | (8,877)             |  |   | 366     |   |  |   |       |   |  |   | 373     |  
|Net income (loss)                               |  |                                  |        |         |        |   | (102                                       | ) |        |                    |  |   | (5,050  | ) |  |   |       |   |  |   | (5,152  | )
|                                                |  |                                  |         |         |        |   |                                            |   |        |                     |  |   |         |   |  |   |        |   |  |   |         |  
|Balance, March 31, 2011                         |  |                                  | 485,476 |         |        | $ | 3,384                                      |   |        | 23,788,300          |  | $ | 165,774 |   |  | $ | 10,220 |   |  | $ | 179,378 |  
|                                                |  |                                  |         |         |        |   |                                            |   |        |                     |  |   |         |   |  |   |        |   |  |   |         |  

See accompanying notes to consolidated financial statements.



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CONSTELLATION ENERGY PARTNERS LLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.
ORGANIZATION AND BASIS OF PRESENTATION

The consolidated financial statements as of, and for the period ended
March 31, 2011, are unaudited, but in the opinion of management include all adjustments (consisting only of normal recurring adjustments) necessary for a fair statement of the results for the interim periods. Certain information and note
disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted under Securities and Exchange Commission (SEC) rules
and regulations. The results reported in these unaudited consolidated financial statements should not necessarily be taken as indicative of results that may be expected for the entire year.

The financial information included herein should be read in conjunction with the financial statements and notes in the Companys
Annual Report on Form 10-K for the year ended December 31, 2010, which was filed on February 25, 2011. Certain amounts in the consolidated financial statements and notes thereto have been reclassified to conform to the 2011 financial
statement presentation.

Constellation Energy Partners LLC (CEP, we, us, our
or the Company) was organized as a limited liability company on February 7, 2005, under the laws of the State of Delaware. We completed our initial public offering on November 20, 2006, and trade on the NYSE Arca under the
symbol CEP. We are partially-owned by Constellation Energy Commodities Group, Inc. (CCG), which is owned by Constellation Energy Group, Inc. (NYSE: CEG) (Constellation or CEG). As of March 31,
2011, affiliates of Constellation own all of our Class A units, all of the management incentive interests, approximately 25% of our Class B common units and all of our Class D interests.

We are currently focused on the development and acquisition of natural gas properties in the Black Warrior Basin in Alabama, the Cherokee
Basin in Kansas and Oklahoma, the Woodford Shale in Oklahoma, and the Central Kansas Uplift in Kansas and Nebraska.

Accounting policies used by us conform to GAAP. The accompanying financial statements include the accounts of us and our wholly-owned
subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. We operate our oil and natural gas properties as one business segment: the exploration, development and production of oil and natural gas.
Our management evaluates performance based on one business segment as there are not different economic environments within the operation of our oil and natural gas properties.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Our significant accounting
policies are consistent with those discussed in our Annual Report on Form 10-K for the year ended December 31, 2010.

Earnings per
Unit

Basic earnings per unit (EPU) are computed by dividing net income attributable to unitholders by the
weighted average number of units outstanding during each period. At March 31, 2011, we had 485,476 Class A units and 23,788,300 Class B units outstanding. Of the Class B units, 1,180,931 units are restricted unvested common units granted
and outstanding.

The following table presents earnings per common unit amounts:



|                                                |  |                             |        |   |       |  |            |                |  |   |       |  
|----------------------------------------------- |  | --------------------------- | ------ | - | ----- |  | ---------- | -------------- |  | - | ----- | -
|                                                |  | Income                      |        |   | Units |  |            | Per UnitAmount | 
|                                                |  | (In 000s except unit data) |       
|For the three months ended March 31, 2011       |  |                             |        |   |       |  |            |                | 
|Basic EPU:                                      |  |                             |        |   |       |  |            |                |  |   |       |  
|Income (loss) allocable to unitholders          |  | $                           | (5,152 | ) |       |  | 24,309,448 |                |  | $ | (0.21 | )
|Effect of dilutive securities:                  |  |                             |        |   |       |  |            |                |  |   |       |  
|Restricted common units that earn distributions |  |                             |       |   |       |  |           |                |  |   |      |  
|                                                |  |                             |        |   |       |  |            |                |  |   |       |  
|Diluted EPU:                                    |  |                             |        |   |       |  |            |                |  |   |       |  
|Income (loss) allocable to common unitholders   |  | $                           | (5,152 | ) |       |  | 24,309,448 |                |  | $ | (0.21 | )



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|                                                |  |                             |        |  |       |  |            |                |  |   |      | 
|----------------------------------------------- |  | --------------------------- | ------ |  | ----- |  | ---------- | -------------- |  | - | ---- | 
|                                                |  | Income                      |        |  | Units |  |            | Per UnitAmount | 
|                                                |  | (In 000s except unit data) |       
|For the three months ended March 31, 2010       |  |                             |        |  |       |  |            |                | 
|Basic EPU:                                      |  |                             |        |  |       |  |            |                |  |   |      | 
|Income (loss) allocable to unitholders          |  | $                           | 18,058 |  |       |  | 24,002,372 |                |  | $ | 0.75 | 
|Effect of dilutive securities:                  |  |                             |        |  |       |  |            |                |  |   |      | 
|Restricted common units that earn distributions |  |                             |       |  |       |  |           |                |  |   |     | 
|                                                |  |                             |        |  |       |  |            |                |  |   |      | 
|Diluted EPU:                                    |  |                             |        |  |       |  |            |                |  |   |      | 
|Income (loss) allocable to common unitholders   |  | $                           | 18,058 |  |       |  | 24,002,372 |                |  | $ | 0.75 | 

3. NEW ACCOUNTING PRONOUNCEMENTS

In January 2010, the FASB issued its final guidance on additional supplemental fair value disclosures. Two new disclosures
will be required: (1) a gross presentation of activities (purchases, sales, and settlements) within the Level 3 roll forward reconciliation, which will replace the net presentation format, and (2) detailed
disclosures about the transfers between Level 1 and 2 measurements. The guidance also provides several clarifications regarding the level of disaggregation and disclosures about inputs and valuation techniques. The new disclosures are effective for
calendar year-end companies, except for the Level 3 gross activity disclosures, which were effective the first quarter of 2011. The adoption of this guidance did not have a material impact on our financial statements or our disclosures.

In February 2010, the FASB amended its guidance on subsequent events. SEC filers are now not required to disclose the date
through which an entity has evaluated subsequent events. The amended guidance was effective upon issuance. The adoption of this guidance did not have an impact on our financial statements or our disclosures.

New Accounting Pronouncements Issued But Not Yet Adopted

As of March 31, 2011, there were a number of accounting standards and interpretations that had been issued, but not yet adopted by us. We are currently reviewing the recently issued standards and
interpretations but none are expected to have a material impact on our financial statements.

4. DERIVATIVE AND FINANCIAL INSTRUMENTS

Mark-to-Market Activities

We have hedged a portion of our expected natural gas sales from currently producing wells through December 2014 and entered into hedging arrangements in the form of interest rate swaps to reduce the
impact of volatility stemming from changes in the London interbank offered rate (LIBOR) on $93.0 million of our outstanding debt for various maturities extending through October 2014. See Note 14 for additional information. All of our
derivatives were accounted for as mark-to-market activities as of March 31, 2011.

For the three months ended
March 31, 2011 and 2010, we recognized mark-to-market losses of approximately $10.1 million and mark-to-market gains of approximately $35.3 million, respectively, in connection with our commodity derivatives. For the three months ended
March 31, 2011 and 2010, we recognized a mark-to-market gain of approximately $0.7 million and a loss of $0.5 million, respectively, in connection with our interest rate derivatives. At March 31, 2011 and December 31, 2010, the fair
value of our derivatives accounted for as mark-to-market activities amounted to a net asset of approximately $73.2 million and a net asset of approximately $83.4 million, respectively.

Accumulated Other Comprehensive Income

Prior to the first quarter
of 2009, we accounted for certain of our commodity and interest rate derivatives as cash flow hedging activities. The value of the cash flow hedges included in accumulated other comprehensive income (loss) on the Consolidated Balance Sheets was an
unrecognized gain of approximately $10.2 million and $10.9 million at March 31, 2011 and December 31, 2010, respectively. We expect that the unrecognized gain will be reclassified from accumulated other comprehensive income (loss)
(AOCI) to the income statement in the following periods:



|                      |  |                      |       |  |                     |  |     |            |  |  |       | 
|--------------------- |  | -------------------- | ----- |  | ------------------- |  | --- | ---------- |  |  | ----- | 
|For the Quarter Ended |  | CommodityDerivatives |       |  | Non-performanceRisk |  |     | Total AOCI | 
|June 30, 2011         |  |                      | 1,960 |  |                     |  | (75 | )          |  |  | 1,885 | 
|September 30, 2011    |  |                      | 1,749 |  |                     |  | (74 | )          |  |  | 1,675 | 
|December 31, 2011     |  |                      | 1,283 |  |                     |  | (60 | )          |  |  | 1,223 | 



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##### Table of Contents

|                      |  |                      |        |  |                     |   |      |            |  |   |        | 
|--------------------- |  | -------------------- | ------ |  | ------------------- | - | ---- | ---------- |  | - | ------ | 
|For the Quarter Ended |  | CommodityDerivatives |        |  | Non-performanceRisk |   |      | Total AOCI | 
|March 31, 2012        |  |                      | 718    |  |                     |   | (22  | )          |  |   | 696    | 
|June 30, 2012         |  |                      | 1,928  |  |                     |   | (66  | )          |  |   | 1,862  | 
|September 30, 2012    |  |                      | 1,721  |  |                     |   | (63  | )          |  |   | 1,658  | 
|December 31, 2012     |  |                      | 1,271  |  |                     |   | (50  | )          |  |   | 1,221  | 
|                      |  |                      |        |  |                     |   |      |            |  |   |        | 
|Total                 |  | $                    | 10,630 |  |                     | $ | (410 | )          |  | $ | 10,220 | 
|                      |  |                      |        |  |                     |   |      |            |  |   |        | 

Fair Value Measurements

We measure fair value of our financial and non-financial assets and liabilities on a recurring basis. Accounting standards define fair value, establish a framework for measuring fair value and require
certain disclosures about fair value measurements for assets and liabilities measured on a recurring basis. All of our derivative instruments are recorded at fair value in our financial statements. Fair value is the exit price that we would receive
to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date.

The following hierarchy prioritizes the inputs used to measure fair value. The three levels of the fair value hierarchy are as follows:



| |  |  | Level 1  Quoted prices available in active markets for identical assets or liabilities as of the reporting date.
| | - |  | -----------------------------------------------------------------------------------------------------------------



| |  |  | Level 2  Pricing inputs other than quoted prices in active markets included in Level 1 which are either directly or indirectly observable as of
the reporting date. Level 2 consists primarily of non-exchange traded commodity derivatives.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Level 3  Pricing inputs include significant inputs that are generally less observable from objective sources.
| | - |  | --------------------------------------------------------------------------------------------------------------

We classify assets and liabilities within the fair value hierarchy based on the lowest level of input that is significant to the fair
value measurement of each individual asset and liability taken as a whole. Certain of our derivatives are classified as Level 3 because observable market data is not available for all of the time periods for which we have derivative instruments. As
observable market data becomes available for all of the time periods, these derivative positions will be reclassified as Level 2. The income valuation approach, which involves discounting estimated cash flows, is primarily used to determine
recurring fair value measurements of our derivative instruments classified as Level 2 or Level 3. We prioritize the use of the highest level inputs available in determining fair value.

Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the
classification of assets and liabilities within the fair value hierarchy. Because of the long-term nature of certain assets and liabilities measured at fair value as well as differences in the availability of market prices and market liquidity over
their terms, inputs for some assets and liabilities may fall into any one of the three levels in the fair value hierarchy. While we are required to classify these assets and liabilities in the lowest level in the hierarchy for which inputs are
significant to the fair value measurement, a portion of that measurement may be determined using inputs from a higher level in the hierarchy.

The following tables set forth by level within the fair value hierarchy our assets and liabilities that were measured at fair value on a recurring basis as of March 31, 2011 and December 31,
2010.



|                            |  |            |   |  |              |   |        |                            |  |   |                     |   |  |   |   |  |  |   |        |  
|--------------------------- |  | ---------- | - |  | ------------ | - | ------ | -------------------------- |  | - | ------------------- | - |  | - | - |  |  | - | ------ | -
|                            |  | Commodity  |   |  | Interestrate |   |        | Netting andCashCollateral* |  |   | Total Net FairValue |  
|At March 31, 2011           |  | Level 1    |   |  | Level 2      |   |        | Level 3                    |  |   |                    
|                            |  | (In 000s) |  
|Risk management assets      |  | $          |  |  |              | $ | 76,311 |                            |  | $ | (2,903              | ) |  | $ |  |  |  | $ | 73,408 |  
|Risk management liabilities |  | $          |  |  |              | $ | (187   | )                          |  | $ |                    |   |  | $ |  |  |  | $ | (187   | )
|                            |  |            |   |  |              |   |        |                            |  |   |                     |   |  |   |   |  |  |   |        |  
|Total                       |  | $          |  |  |              | $ | 76,124 |                            |  | $ | (2,903              | ) |  | $ |  |  |  | $ | 73,221 |  
|                            |  |            |   |  |              |   |        |                            |  |   |                     |   |  |   |   |  |  |   |        |  



|* | We currently use our reserve-based credit facility to provide credit support for our derivative transactions and therefore we do not post cash collateral with our
counterparties.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|                            |  |            |   |  |              |   |        |                            |  |   |                     |   |  |   |   |  |  |   |        |  
|--------------------------- |  | ---------- | - |  | ------------ | - | ------ | -------------------------- |  | - | ------------------- | - |  | - | - |  |  | - | ------ | -
|                            |  | Commodity  |   |  | Interestrate |   |        | Netting andCashCollateral* |  |   | Total Net FairValue |  
|At December 31, 2010        |  | Level 1    |   |  | Level 2      |   |        | Level 3                    |  |   |                    
|                            |  | (In 000s) |  
|Risk management assets      |  | $          |  |  |              | $ | 87,072 |                            |  | $ | (3,573              | ) |  | $ |  |  |  | $ | 83,499 |  
|Risk management liabilities |  | $          |  |  |              | $ | (141   | )                          |  | $ |                    |   |  | $ |  |  |  | $ | (141   | )
|                            |  |            |   |  |              |   |        |                            |  |   |                     |   |  |   |   |  |  |   |        |  
|Total                       |  | $          |  |  |              | $ | 86,931 |                            |  | $ | (3,573              | ) |  | $ |  |  |  | $ | 83,358 |  
|                            |  |            |   |  |              |   |        |                            |  |   |                     |   |  |   |   |  |  |   |        |  



|* | We currently use our reserve-based credit facility to provide credit support for our derivative transactions and therefore we do not post cash collateral with our
counterparties.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Risk management assets and liabilities in the table above represent the current fair value
of all open derivative positions. We classify all of our derivative instruments as Risk management assets or Risk management liabilities in our Consolidated Balance Sheets.

We use observable market data or information derived from observable market data in order to determine the fair value amounts presented
above. We currently use our reserve-based credit facility to provide credit support for our derivative transactions. As a result, we do not post cash collateral with our counterparties, and have minimal non-performance credit risk on our liabilities
with counterparties. We utilize observable market data for credit default swaps to assess the impact of non-performance credit risk when evaluating our net assets from counterparties. At March 31, 2011, the impact of non-performance credit risk
on the valuation of our net assets from counterparties was $0.8 million, of which $0.4 million was reflected as a decrease to our non-cash mark-to-market gain and $0.4 million was reflected as a reduction to our accumulated other comprehensive
income. At March 31, 2010, the impact of non-performance credit risk on the valuation of our net assets from counterparties was $1.1 million, of which $0.5 million was reflected as a decrease to our non-cash mark-to-market gain and $0.6 million
was reflected as a reduction to our accumulated other comprehensive income.

The following table sets forth a reconciliation
of changes in the fair value of risk management assets and liabilities classified as Level 3 in the fair value hierarchy:



|                                                                                   |  |                                            |        |  
|---------------------------------------------------------------------------------- |  | ------------------------------------------ | ------ | -
|                                                                                   |  | Three Months EndedMarch 31, 2011(In 000s) |       
|Balance at beginning of period                                                     |  | $                                          | (3,573 | )
|Realized and unrealized gain (loss):                                               |  |                                            |        |  
|Included in earnings                                                               |  |                                            | 134    |  
|Included in other comprehensive income                                             |  |                                            |       |  
|Settlements                                                                        |  |                                            | 536    |  
|Transfers into and (out of) Level 3                                                |  |                                            |       |  
|                                                                                   |  |                                            |        |  
|Balance as of March 31, 2011                                                       |  | $                                          | (2,903 | )
|                                                                                   |  |                                            |        |  
|Change in unrealized gains relating to derivatives still held as of March 31, 2011 |  | $                                          | 134    |  
|                                                                                   |  |                                            |        |  
|                                                                                   | 
|                                                                                   |  | Three Months EndedMarch 31, 2010(In 000s) |       
|Balance at beginning of period                                                     |  | $                                          | (4,727 | )
|Realized and unrealized gain (loss):                                               |  |                                            |        |  
|Included in earnings                                                               |  |                                            | (1,354 | )
|Included in other comprehensive income                                             |  |                                            |       |  
|Settlements                                                                        |  |                                            | 1,226  |  
|Transfers into and (out of) Level 3                                                |  |                                            |       |  
|                                                                                   |  |                                            |        |  
|Balance as of March 31, 2010                                                       |  | $                                          | (4,855 | )
|                                                                                   |  |                                            |        |  
|Change in unrealized gains relating to derivatives still held as of March 31, 2010 |  | $                                          | (1,354 | )
|                                                                                   |  |                                            |        |  



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Fair Value of Financial Instruments

At March 31, 2011, the carrying values of cash and cash equivalents, accounts receivable, other current assets and current
liabilities on the Consolidated Balance Sheets approximate fair value because of their short term nature. We believe the carrying value of long-term debt approximates its fair value because the interest rates on the debt approximate market interest
rates for debt with similar terms, which represents the amount at which the instrument could be valued in an exchange during a current transaction between willing parties.

The following fair value disclosures are applicable to our financial statements, as of March 31, 2011 and December 31, 2010:



|                  |  |                                                              |  |                                                             |                             |   |                             |   |        |  
|----------------- |  | ------------------------------------------------------------ |  | ----------------------------------------------------------- | --------------------------- | - | --------------------------- | - | ------ | -
|Derivative Type   |  | Location of Asset /
(Liability) on Balance Sheet             |  | Fair Value of Asset /(Liability) on Balance Sheet(in 000s) |                            
|                  |  | Quarter EndedMarch 31, 2011                                  |  |                                                             | Year EndedDecember 31, 2010 |  
|Commodity-MTM     |  | Risk management assets-current                               |  | $                                                           | 37,818                      |   |                             | $ | 38,945 |  
|Commodity-MTM     |  | Risk management assets-non-current                           |  |                                                             | 50,422                      |   |                             |   | 60,324 |  
|Commodity-MTM     |  | Risk management assets-current                               |  |                                                             | (4,285                      | ) |                             |   | (2,432 | )
|Commodity-MTM     |  | Risk management assets-non-current                           |  |                                                             | (7,644                      | ) |                             |   | (9,765 | )
|Commodity-MTM     |  | Risk management liabilities-current                          |  |                                                             | (187                        | ) |                             |   | (141   | )
|Interest Rate-MTM |  | Risk management assets-non-current                           |  |                                                             | (2,903                      | ) |                             |   | (3,573 | )
|                  |  |                                                              |  |                                                             |                             |   |                             |   |        |  
|                  |  | Total Derivatives                                            |  | $                                                           | 73,221                      |   |                             | $ | 83,358 |  
|                  |  |                                                              |  |                                                             |                             |   |                             |   |        |  
|                  |  |                                                             
|                  |  |                                                              |  | Amount of Gain / (Loss)in Income (in 000s)                 |                            
|Derivative Type   |  | Location of Gain / (Loss)
in Income                          |  | Quarter EndedMarch 31, 2011                                 |                             |   | Quarter EndedMarch 31, 2010 |  
|Commodity-MTM     |  | Gain/(Loss) from mark-to-market activities                   |  | $                                                           | (10,109                     | ) |                             | $ | 35,281 |  
|Commodity-MTM     |  | Oil and gas sales                                            |  |                                                             | 9,795                       |   |                             |   | 1,898  |  
|Interest Rate-MTM |  | Interest expense-Gain/(Loss) from mark-to- market activities |  |                                                             | 670                         |   |                             |   | (517   | )
|Interest Rate-MTM |  | Interest expense                                             |  |                                                             | (536                        | ) |                             |   | (837   | )
|                  |  |                                                              |  |                                                             |                             |   |                             |   |        |  
|                  |  | Total                                                        |  | $                                                           | (180                        | ) |                             | $ | 35,825 |  
|                  |  |                                                              |  |                                                             |                             |   |                             |   |        |  



|                        |  |                                                                                       |  |                                     |                            |  |  |   |       |  
|----------------------- |  | ------------------------------------------------------------------------------------- |  | ----------------------------------- | -------------------------- |  |  | - | ----- | -
|Derivative Type         |  | Location of Gain 
/(Loss)for Effective 
andIneffectivePortion of 
Derivativein Income |  | Amount of Gain /(Loss) Reclassified |                           
|                        |  | from AOCI into Income - Effective                                                     | 
|                        |  | Quarter EndedMarch 31,2011                                                            |  |                                     | Quarter EndedMarch 31,2010 | 
|Commodity-Cash Flow     |  | Oil and gas sales                                                                     |  |                                     | 724                        |  |  |   | 5,728 |  
|Interest Rate-Cash Flow |  | Interest expense                                                                      |  |                                     | 0                          |  |  |   | (389  | )
|                        |  |                                                                                       |  |                                     |                            |  |  |   |       |  
|                        |  | Total                                                                                 |  | $                                   | 724                        |  |  | $ | 5,339 |  
|                        |  |                                                                                       |  |                                     |                            |  |  |   |       |  

As of March 31, 2011, we have interest rate swaps on $93.0 million of outstanding debt for various
maturities extending through October 2014, various commodity swaps for 30,960,000 MMbtu of natural gas production through December 2014, and various basis swaps for 19,162,160 MMbtu of natural gas production in the Cherokee Basin through December
2014. See Note 14 for additional information.



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5. DEBT

Reserve-Based Credit Facility

On November 13, 2009, we entered
into an amended and restated $350.0 million reserve-based credit facility with The Royal Bank of Scotland plc as administrative agent and a syndicate of lenders. The reserve-based credit facility amends, extends, and consolidates our previous
reserve-based credit facilities and matures on November 13, 2012. Borrowings under the reserve-based credit facility are secured by various mortgages of oil and natural gas properties that we and certain of our subsidiaries own as well as
various security and pledge agreements among us and certain of our subsidiaries and the administrative agent. The current lenders and their percentage commitments in the reserve-based credit facility are: The Royal Bank of Scotland plc (26.84%), BNP
Paribas (21.95%), The Bank of Nova Scotia (21.95%), Wells Fargo Bank, N.A. (14.63%), and Societe Generale (14.63%).

The
amount available for borrowing at any one time under the reserve-based credit facility is limited to the borrowing base for our oil and natural gas properties. As of March 31, 2011, our borrowing base was $195.0 million. The borrowing base is
redetermined semi-annually, and may be redetermined at our request more frequently and by the lenders, in their sole discretion, based on reserve reports as prepared by petroleum engineers, together with, among other things, the oil and natural gas
prices prevailing at such time. Our next semi-annual borrowing base redetermination is scheduled during the second quarter of 2011. Outstanding borrowings in excess of our borrowing base must be repaid or we must pledge other oil and natural gas
properties as additional collateral. We may elect to pay any borrowing base deficiency in three equal monthly installments such that the deficiency is eliminated in a period of three months. Any increase in our borrowing base must be approved by all
of the lenders.

Borrowings under the reserve-based credit facility are available for acquisition, exploration, operation and
maintenance of oil and natural gas properties, payment of expenses incurred in connection with the reserve-based credit facility, working capital and general limited liability company purposes. The reserve-based credit facility has a sub-limit of
$20.0 million which may be used for the issuance of letters of credit. As of March 31, 2011, no letters of credit are outstanding.

At our election, interest for borrowings are determined by reference to (i) the London interbank rate, or LIBOR, plus an applicable margin between 2.50% and 3.50% per annum based on utilization
or (ii) a domestic bank rate (ABR) plus an applicable margin between 1.50% and 2.50% per annum based on utilization plus (iii) a commitment fee of 0.50% per annum based on the unutilized borrowing base. Interest on
the borrowings for ABR loans and the commitment fee are generally payable quarterly. Interest on the borrowings for LIBOR loans are generally payable at the applicable maturity date.

The reserve-based credit facility contains various covenants that limit, among other things, our ability and certain of our
subsidiaries ability to incur certain indebtedness, grant certain liens, merge or consolidate, sell all or substantially all of our assets, make certain loans, acquisitions, capital expenditures and investments, and pay distributions.

In addition, we are required to maintain (i) a ratio of Total Net Debt (defined as Debt (generally indebtedness
permitted to be incurred by us under the reserve-based credit facility) less Available Cash (generally, cash, cash equivalents, and cash reserves of the Company)) to Adjusted EBITDA (defined as, for any period, the sum of consolidated net income for
such period plus (minus) the following expenses or charges to the extent deducted from consolidated net income in such period: interest expense, depreciation, depletion, amortization, write-off of deferred financing fees, impairment of long-lived
assets, (gain) loss on sale of assets, exploration costs, (gain) loss from equity investment, accretion of asset retirement obligation, unrealized (gain) loss on derivatives and realized (gain) loss on cancelled derivatives, and other similar
charges) of not more than 3.50 to 1.0; (ii) Adjusted EBITDA to cash interest expense of not less than 2.5 to 1.0; and (iii) consolidated current assets, including the unused amount of the total commitments but excluding current non-cash
assets, to consolidated current liabilities, excluding non-cash liabilities and current maturities of debt (to the extent such payments are not past due), of not less than 1.0 to 1.0, all calculated pursuant to the requirements under SFAS 133 and
SFAS 143 (including the current liabilities in respect of the termination of natural gas and interest rate swaps). All financial covenants are calculated using our consolidated financial information.

The reserve-based credit facility also includes customary events of default, including events of default relating to non-payment of
principal, interest or fees, inaccuracy of representations and warranties in any material respect when made or when deemed made, violation of covenants, cross-defaults, bankruptcy and insolvency events, certain unsatisfied judgments, guaranties not
being valid under the reserve-based credit facility and a change of control. If an event of default occurs, the lenders will be able to accelerate the maturity of the reserve-based credit facility and exercise other rights and remedies. The
reserve-based credit facility contains a condition to borrowing and a representation that no material adverse effect (MAE) has occurred, which includes, among other things, a material adverse change in, or material adverse effect on the
business, operations, property, liabilities (actual or contingent) or condition (financial or otherwise) of us and our subsidiaries who are guarantors taken as a whole. If a MAE were to occur, we would be prohibited from borrowing under the
reserve-based credit facility and would be in default, which could cause all of our existing indebtedness to become immediately due and payable.



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We have the ability to pay distributions to unitholders from available cash, including cash
from borrowings under the reserve-based credit facility, as long as no event of default exists and provided that no distributions to unitholders may be made if the borrowings outstanding, net of available cash, under the reserve-based credit
facility exceed 90% of the borrowing base, after giving effect to the proposed distribution. Our available cash is reduced by any cash reserves established by our board of managers for the proper conduct of our business and the payment of fees and
expenses. As of May 6, 2011, we were restricted from paying distributions to unitholders as we had no available cash (taking into account the cash reserves set by our board of managers for the proper conduct of our business) from which to pay
distributions.

The reserve-based credit facility permits us to hedge our projected monthly production, provided that
(a) for the immediately ensuing twelve month period, the volumes of production hedged in any month may not exceed our reasonable business judgment of the production for such month consistent with the application of petroleum engineering
methodologies for estimating proved developed producing reserves based on the then-current strip pricing (provided that such projection shall not be more than 115% of the proved developed producing reserves forecast for the same period derived from
the most recent reserve report of our petroleum engineers using the then strip pricing), and (b) for the period beyond twelve months, the volumes of production hedged in any month may not exceed the reasonably anticipated projected production
from proved developed producing reserves estimated by our petroleum engineers. The reserve-based credit facility also permits us to hedge the interest rate on up to 90% of the then-outstanding principal amounts of our indebtedness for borrowed
money.

The reserve-based credit facility contains no covenants related to our relationship with Constellation or
Constellations right to appoint all of the Class A managers of our board of managers.

Debt Issue Costs

As of March 31, 2011, our unamortized debt issue costs were approximately $3.2 million. These costs are being
amortized over the life of the credit facility through November 2012.

Funds Available for Borrowing

As of March 31, 2011 and 2010, we had $157.5 million and $185.0 million, respectively, in outstanding debt under our reserve-based
credit facility. As of March 31, 2011, we had $37.5 million in remaining borrowing capacity under the reserve-based credit facility.

Compliance with Debt Covenants

At March 31, 2011, we believe that we were in
compliance with the financial covenant ratios contained in our reserve-based credit facility. We monitor compliance on an ongoing basis. As of March 31, 2011, our actual Total Net Debt to annual Adjusted EBITDA ratio was 2.9 to 1.0 as compared
with a required ratio of not greater than 3.5 to 1.0, our actual ratio of consolidated current assets to consolidated current liabilities was 4.6 to 1.0 as compared with a required ratio of not less than 1.0 to 1.0, and our actual Adjusted EBITDA to
cash interest expense ratio was 8.7 to 1.0 as compared with a required ratio of not less than 2.5 to 1.0.

If we are unable to
remain in compliance with the debt covenants associated with our reserve-based credit facility or maintain the required ratios discussed above, we could request waivers from the lenders in our bank group. Although the lenders may not provide a
waiver, we could take additional steps in the event of not meeting the required ratios or in the event of a reduction in the borrowing base as determined by the lenders. During 2011, we intend to use our surplus operating cash flows to reduce our
outstanding debt. If it becomes necessary to reduce debt by amounts that exceed our operating cash flows, we could further reduce capital expenditures, continue to suspend our quarterly distributions to unitholders, sell oil and natural gas
properties, liquidate in-the-money derivative positions, further reduce operating and administrative costs, or take additional steps to increase liquidity. If we become unable to obtain a waiver and were unsuccessful at reducing our debt to the
necessary level, our debt could become due and payable upon acceleration by the lenders. To the extent that we do not enter into an agreement to refinance or extend the due date on the reserve-based credit facility, the outstanding debt balance at
November 13, 2011, will become a current liability.



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6. OIL AND NATURAL GAS PROPERTIES

Natural gas properties consist of the following:



|                                                                                 |  |               |          |   |                  |   |          |  
|-------------------------------------------------------------------------------- |  | ------------- | -------- | - | ---------------- | - | -------- | -
|                                                                                 |  | March 31,2011 |          |   | December 31,2010 |  
|                                                                                 |  | (In 000s)    |         
|Oil and natural gas properties and related equipment (successful efforts method) |  |               |          |   |                  |   |          |  
|Property (acreage) costs                                                         |  |               |          |   |                  |   |          |  
|Proved property                                                                  |  | $             | 774,098  |   |                  | $ | 772,450  |  
|Unproved property                                                                |  |               | 722      |   |                  |   | 698      |  
|                                                                                 |  |               |          |   |                  |   |          |  
|                                                                                 |  |              
|Total property costs                                                             |  |               | 774,820  |   |                  |   | 773,148  |  
|Materials and supplies                                                           |  |               | 2,080    |   |                  |   | 2,073    |  
|Land                                                                             |  |               | 912      |   |                  |   | 912      |  
|                                                                                 |  |               |          |   |                  |   |          |  
|                                                                                 |  |              
|Total                                                                            |  |               | 777,812  |   |                  |   | 776,133  |  
|Less: Accumulated depreciation, depletion, amortization and impairments          |  |               | (504,979 | ) |                  |   | (499,214 | )
|                                                                                 |  |               |          |   |                  |   |          |  
|                                                                                 |  |              
|Natural gas properties and equipment, net                                        |  | $             | 272,833  |   |                  | $ | 276,919  |  
|                                                                                 |  |               |          |   |                  |   |          |  

Depletion, depreciation, amortization and impairments consisted of the following:



|                                           |  |                               |       |  |                               |   |        | 
|------------------------------------------ |  | ----------------------------- | ----- |  | ----------------------------- | - | ------ | 
|                                           |  |                              
|                                           |  | ThreeMonthsEndedMarch 31,2011 |       |  | ThreeMonthsEndedMarch 31,2010 |  
|                                           |  | (In 000s)                    |      
|DD&A of oil and natural gas-related assets |  | $                             | 5,865 |  |                               | $ | 27,248 | 
|                                           |  |                               |       |  |                               |   |        | 
|Total                                      |  | $                             | 5,865 |  |                               | $ | 27,248 | 
|                                           |  |                               |       |  |                               |   |        | 

Asset Sales

In the three months ended March 31, 2011, we sold miscellaneous equipment and surplus inventory for approximately $0.01 million and recorded a gain of approximately $0.01 million on the sales.

Useful Lives

Our furniture, fixtures, and equipment are depreciated over a life of one to five years, buildings are depreciated over a life of twenty years, and pipeline and gathering systems are depreciated over a
life of twenty-five to forty years.

Exploration and Dry Hole Costs

Our exploration and dry hole costs were $0.1 million and $0.2 million in the three months ended March 31, 2011 and 2010,
respectively. These costs represent abandonments of drilling locations, dry hole costs, delay rentals, geological and geophysical costs, and the impairment, amortization, and abandonment associated with leases on our unproved properties.

7. RELATED PARTY TRANSACTIONS

Unit Ownership

Constellation owns a significant number of our units. As of March 31, 2011, CEPM owns all 485,476 of our Class A units, and all
of the management incentive interests; Constellation Energy Partners Holdings, LLC, or CEPH, owns 5,918,894 Class B common units; and Constellation Holdings, Inc., or CHI, owns all of our Class D interests. As of March 31, 2010, CEPM owned all
490,613 of our Class A units, and all of the management incentive interests; CEPH owned 5,918,894 Class B common units; and CHI owned all of our Class D interests.

Each of CEPM, CEPH and CHI is a wholly owned subsidiary of Constellation.

Management
Incentive Interests

CEPM holds the management incentive interests in CEP. These management incentive interests
represent the right to receive 15% of quarterly distributions of available cash from operating surplus after the Target Distribution (as defined in our limited liability company agreement) has been achieved and certain other tests have been met.
Through the three months



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ended March 31, 2011, none of these applicable tests have been met, and, as a result, CEPM was not entitled to receive any management incentive interest distributions.

Class D Interests

Our Class D interest special quarterly distributions to CHI have been suspended for all quarters commencing on or after January 1,
2008. This suspension includes approximately $4.0. million which represents the distributions that were suspended for the quarterly periods ended December 31, September 30, June 30, and March 31, 2010, and December 31,
September 30, June 30, and March, 31, 2009, and December 31, September 30, June 30, and March 31, 2008. Including the suspended distributions, the remaining undistributed amount of the Class D interests yet to be paid
is $6.7 million. See Note 14 for additional information.

8. COMMITMENTS AND CONTINGENCIES

In the course of its normal business affairs, we are subject to possible loss contingencies arising from federal, state and local
environmental, health and safety laws and regulations. These laws and regulations can result in increased capital, operating and other costs as a result of compliance, remediation, containment and monitoring obligations. We are also subject to
possible loss contingencies from third-party litigation. As of March 31, 2011, other than the matters discussed below, there were no matters which, in the opinion of management, would have a material adverse effect on the financial position,
results of operations or cash flows of CEP, and its subsidiaries, taken as a whole.

Certain of our wells in the
Robinsons Bend Field are subject to a net profits interest (NPI) held by Torch Energy Royalty Trust (the Trust) (See Note 10). The royalty payment to the Trust is calculated using a sharing arrangement with a
pricing formula that has had the effect of keeping our payments to the Trust lower than if such payments had been calculated based on prevailing market prices. We are uncertain of the financial impact of the NPI over the life of the Robinsons
Bend Field as it has volumetric and price risk variables. However, in order to address a portion of the risk of the potential adverse impact on our operating results from a termination of the sharing arrangement, CHI contributed $8.0 million to us
in exchange for all of our Class D interests at the closing of our initial public offering in November 2006 for the purpose of partially protecting the distributions to the common unit holders in the event the sharing arrangement is terminated. This
contribution will be returned to CHI in 24 special quarterly distributions as long as the sharing agreement remains in effect for the distribution period. As discussed in Note 7 and Note 14, the Class D interest special quarterly distributions have
been suspended for all quarters commencing after January 1, 2008.

9. ASSET RETIREMENT OBLIGATION

We recognize the fair value of a liability for an asset retirement obligation (ARO) in the period in which it is incurred if a
reasonable estimate of fair value can be made. Each period, we accrete the ARO to its then present value. The associated asset retirement cost (ARC) is capitalized as part of the carrying amount of our natural gas properties equipment
and facilities. Subsequently, the ARC is depreciated using a systematic and rational method over the assets useful life. The AROs recorded by us relate to the plugging and abandonment of natural gas wells, and decommissioning of the gas
gathering and processing facilities.

Inherent in the fair value calculation of ARO are numerous assumptions and judgments
including the ultimate settlement amounts, inflation factors, credit adjusted discount rates, timing of settlement and changes in the legal, regulatory, environmental and political environments. To the extent future revisions to these assumptions
result in adjustments to the recorded fair value of the existing ARO, a corresponding adjustment is made to the ARC capitalized as part of the oil and natural gas property balance.

The following table is a reconciliation of the ARO:



|                                                        |  |               |        |   |                  |   |        |  
|------------------------------------------------------- |  | ------------- | ------ | - | ---------------- | - | ------ | -
|                                                        |  | March 31,2011 |        |   | December 31,2010 |  
|                                                        |  | (In 000s)    |       
|Asset retirement obligation, beginning balance          |  | $             | 13,024 |   |                  | $ | 12,129 |  
|Liabilities incurred from acquisition of the properties |  |               |       |   |                  |   | 32     |  
|Liabilities incurred                                    |  |               | 13     |   |                  |   | 83     |  
|Liabilities settled                                     |  |               | (16    | ) |                  |   | (42    | )
|Revisions to prior estimates                            |  |               |       |   |                  |   |       |  
|Accretion expense                                       |  |               | 226    |   |                  |   | 822    |  
|                                                        |  |               |        |   |                  |   |        |  
|Asset retirement obligation, ending balance             |  | $             | 13,247 |   |                  | $ | 13,024 |  
|                                                        |  |               |        |   |                  |   |        |  



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Additional retirement obligations increase the liability associated with new oil and natural
gas wells and other facilities as these obligations are incurred. Actual expenditures for abandonments of oil and natural gas wells and other facilities reduce the liability for asset retirement obligation. At March 31, 2011, and
December 31, 2010, there were no significant expenditures for abandonments and there were no assets legally restricted for purposes of settling existing asset retirement obligations.

10. NET PROFITS INTEREST

Certain of our wells in the Robinsons Bend
Field are subject to a non-operating NPI. The holder of the NPI, the Trust, does not have the right to receive production from the applicable wells in the Robinsons Bend Field. Instead, the Trust only has the right to receive a specified
portion of the future natural gas sales revenues from specified wells as defined by the Net Overriding Royalty Conveyance Agreement (the Conveyance). We record the NPI as an overriding royalty interest net in revenue in the Consolidated
Statements of Operations.

Amounts due to the Trust with respect to NPI are comprised of the sum of the Net Proceeds and the
Infill Net Proceeds, which are described below.

The Net Proceeds equal the lesser of (i) 95% of the net proceeds from
393 producing wells in the Robinsons Bend Field and (ii) the net proceeds from the sale of 912.5 MMcf of natural gas for the quarter. Net proceeds equal gross proceeds, currently calculated by reference to the gas purchase contract, less
specified costs attributable to the Robinsons Bend Assets. The specified costs deducted for purposes of calculating net proceeds for purposes of clause (i) of the first sentence of this paragraph (the NPI Net Proceeds Calculation)
include: (a) delay rentals, shut-in royalties and similar payments, (b) property, production, severance and similar taxes and related audit charges, (c) specified refunds, interest or penalties paid to purchasers of hydrocarbons or
governmental agencies, (d) certain liabilities for environmental damage, personal injury and property damage, (e) certain litigation costs, (f) costs of environmental compliance, (g) specified operating costs incurred to produce
hydrocarbons, (h) specified development costs (including costs to increase recoverable reserves or the timing of recovery of such reserves), (i) costs of specified lease renewals and extensions and unitization costs and (j) the
unrecovered portion, if any, of the foregoing costs for preceding time periods plus interest on such unrecovered portion at a rate equal to the base rate (compounded quarterly) as announced from time to time by Citibank, N.A. The specified costs
deducted for purposes of calculating net proceeds for purposes of clause (ii) of the first sentence of this paragraph include: (a) property, production, severance and similar taxes, (b) specified refunds, interest or penalties paid to
purchasers of hydrocarbons or governmental agencies and (c) the unrecovered portion, if any, of the foregoing costs for preceding time periods plus interest on such unrecovered portion at a rate equal to the base rate (compounded quarterly) as
announced from time to time by Citibank, N.A. Net proceeds are calculated quarterly and any negative balance (expenses in excess of revenues) within the net proceeds calculation accumulates and is charged interest as described above.

The cumulative Net NPI Proceeds balance must be greater than $0 before any payments are made to the Trust. The
cumulative Net Proceeds was a deficit for the three months ended March 31, 2011 and 2010. As a result, no payments were made to the Trust with respect to the NPI for the three months ended March 31, 2011 and 2010. The calculation of the
Infill Net Proceeds uses the same methodology as the NPI Net Proceeds Calculation described above except that the proceeds and costs are attributable not to the NPI Net Proceeds Wells, but to the remaining wells in the Robinsons Bend Field
that are subject to the NPI and that have been drilled since the Trust was formed and wells that will be drilled (other than wells drilled to replace damaged or destroyed wells), in each case on leases subject to the NPI. The NPI in the Infill Wells
entitles the Trust to receive 20% of the Infill Net Proceeds. There has never been a payout on the Infill Net Proceeds.

Termination of the Trust and Gas Purchase Contract

On January 29, 2008, the unitholders of the Trust voted to terminate the Trust and the trust agreement and authorized the Trustee to wind up, liquidate and distribute the assets held by the Trust
under the terms of the trust agreement. The gas purchase contract, by its terms, was also terminated on January 29, 2008 as a result of the termination of the Trust. With the gas purchase contract terminated, we are no longer obligated to sell
gas produced from our interest in the Black Warrior Basin pursuant to the gas purchase contract. Notwithstanding the termination of the gas purchase contract, the NPI will continue to burden the Trust Wells, and it should continue to be calculated
as if the gas purchase contract were still in effect, regardless of what proceeds may actually be received by us as the seller of the gas. As a result of the termination of the Trust, certain water gathering, separation and disposal costs, which are
a component of the NPI calculation, increased from $0.53 per barrel to $1.00 per barrel pursuant to the Water Gathering and Disposal Agreement dated August 9, 1990, as amended; the amounts of the water gathering, separation and disposal costs
are set forth in such agreement.

Litigation Related to Trust Termination

As previously disclosed, on January 8, 2009, we were served by Trust Venture, on behalf of the Trust, with a purported derivative
action filed in the Circuit Court of Tuscaloosa County, Alabama (the Court). The lawsuit relates to the non-



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operating net profits interest (NPI) held by the Trust on certain wells owned by Robinsons Bend Production II, LLC (RBP II), a subsidiary of the Company, in the
Robinsons Bend Field in Alabama, and alleges, among other things, a breach of contract under the Conveyance and the agreement establishing the Trust and asserting that above market rates for services were paid, reducing the amounts paid to the
Trust in connection with the NPI. The lawsuit seeks unspecified damages and an accounting of the NPI. The Court made the Trust a nominal party to the lawsuit. At a preliminary hearing on February 17, 2011, the Court approved a form of notice of
a settlement among the parties to be sent by the Trust to its unitholders. A final hearing on the settlement is set during April 2011. No assurance can be made that the Court will approve the settlement or that the Trust will sell the NPI to
RBP II. See Note 14 for additional information. The settlement with Trust Venture, its successor and the Trust provides, among other things:



| |  |  | RBP II will make a payment of $1.2 million to reimburse Trust Venture and its successor for their legal fees and expenses incurred in prosecuting the
lawsuit;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | RBP II will make an irrevocable offer to purchase the NPI relating to the Robinsons Bend Field from the Trust for at least $1 million, when it is
separately offered for sale by the Trust at public auction within 180 days of the effective date of the settlement, with such bid amount to be deposited by RBP II in a third-party escrow account pending the public auction. RBP II, as well as any
other bidders at the auction, shall have a right to submit a higher topping bid;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The parties agree that the cumulative deficit balance in the NPI account is approximately $5.8 million as of September 30, 2010, and that no
further payments will be due to the Trust with respect to the NPI unless and until the cumulative deficit balance is reduced to zero;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Trust Venture and its successor agree, on behalf of the Trust, that all prior and current calculations, charges and deductions contained in such
cumulative deficit NPI balance are in compliance with the terms of the Conveyance and, to the extent applicable thereunder, do not exceed competitive contract charges prevailing in the area for any such operations and services;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The Water Gathering and Disposal Agreement between RBP II and another subsidiary of the Company will be amended to reduce the fee from $1.00 per barrel
to $0.53 per barrel beginning on the first day of the month following the effective date of the settlement and to extend the term for an additional ten years, and Trust Venture and its successor agree, on behalf of the Trust, that the fees under
such agreement do not exceed competitive contract charges prevailing in the area for the operations and services provided under such agreement during the extended term of such agreement;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A mutual release among the parties and a dismissal with prejudice of the lawsuit; and
| | - |  | -------------------------------------------------------------------------------------



| |  |  | An effective date of the settlement upon final approval by the Court.
| | - |  | ---------------------------------------------------------------------

11. UNIT-BASED COMPENSATION

We recognized approximately $0.4 million and
$0.4 million of expense related to our unit-based compensation plans in the three months ended March 31, 2011, and March 31, 2010, respectively. As of March 31, 2011, we had approximately $3.7 million in unrecognized compensation
expense related to our unit-based compensation plans expected to be recognized through the first quarter of 2015. See Note 14 for additional information.

12. DISTRIBUTIONS TO UNITHOLDERS

Distributions through March 31,
2011

Beginning in June 2009, we suspended our quarterly distributions to unitholders. For the quarter ended March 31,
2011, we were restricted from paying distributions to unitholders as we had no available cash (taking into account the cash reserves set by our board of managers for the proper conduct of our business) from which to pay distributions. See Note 14
for additional information.

Distributions through March 31, 2010

For the quarter ended March 31, 2010, we were restricted from paying distributions to unitholders as we had no available cash (taking
into account the cash reserves set by our board of managers for the proper conduct of our business) from which to pay distributions.



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13. MEMBERS EQUITY

2011 Equity

At March 31, 2011, we had 485,476 Class A units and
23,788,300 Class B common units outstanding, which included 208,136 unvested restricted common units issued under our Long-Term Incentive Plan and 972,795 unvested restricted common units issued under our 2009 Omnibus Incentive Compensation Plan.

At March 31, 2011, we had granted 360,708 common units of the 450,000 common units available under our Long-Term
Incentive Plan. Of these grants, 152,572 have vested.

At March 31, 2011, 125,615 common units have vested out of the
300,000 common units available under our Executive Inducement Bonus Program. This program has now terminated and the remaining 174,385 have been cancelled.

At March 31, 2011, we had granted 1,403,214 common units of the 1,650,000 common units available under our 2009 Omnibus Incentive Compensation Plan. Of these grants, 430,419 have vested.

For the three months ended March 31, 2011, 104,675 common units have been tendered by our employees for tax withholding purposes.
These units, costing approximately $0.3 million, have been returned to their respective plan and are available for future grants.

2010 Equity

At March 31, 2010, we had 490,613 Class A units and
24,040,055 Class B common units outstanding, which included 428,273 unvested restricted common units issued under our Long-Term Incentive Plan, 83,745 unvested restricted common units issued under our Executive Inducement Bonus Program, and
1,330,707 unvested restricted common units issued under our 2009 Omnibus Incentive Compensation Plan.

At March 31, 2010,
we had granted all common units of the 450,000 common units available under our Long-Term Incentive Plan. Of these grants, 21,727 have vested.

At March 31, 2010, we had granted 146,552 common units of the 300,000 common units available under our Executive Inducement Bonus Program. Of these grants, 62,807 have vested.

At March 31, 2010, we had granted 1,544,740 common units of the 1,650,000 common units available under our 2009 Omnibus Incentive
Compensation Plan. Of these grants, 214,033 have vested.

For the three months ended March 31, 2010, 73,660 common units
have been tendered by our employees for tax withholding purposes. These units, costing approximately $0.3 million, have been returned to their respective plan and are available for future grants.

14. SUBSEQUENT EVENTS

The following subsequent events have occurred between March 31, 2011, and May 6, 2011:

Distribution

Our
board of managers has suspended the quarterly distribution to our unitholders for the quarter ended March 31, 2011, which continues the suspension we first announced in June 2009.

Class D Interests

In connection with litigation related to the
Torch NPI, we have suspended all quarterly cash contributions with respect to our Class D interests. This suspension, approved by our board of managers, includes the $0.3 million quarterly cash distribution for the three months ended March 31,
2011 and $4.0 million which represents the distributions that were suspended for the quarterly periods ended December 31, September 30, June 30, and March 31, 2010, December 31, September 30, June 30,
and March 31, 2009, and December 31, September 30, June 30, and March 31, 2008. The remaining undistributed amount of the Class D interests yet to be paid is $6.7 million.

Litigation Related to Trust Termination

On April 13, 2011, the Court approved the Torch NPI litigation settlement. The anticipated effective date of the settlement is June 13, 2011, absent appeal of the Courts order. The $1.2
million to reimburse Trust Venture for its fees and expenses in prosecuting the lawsuit is accrued as a current liability in our consolidated balance sheet as of March 31, 2011.



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Derivative and Financial Instruments

As of March 31, 2011, we have interest rate swaps on $93.0 million of outstanding debt for various maturities extending through
October 2014, various commodity swaps for 30,960,000 MMbtu of natural gas production through December 2014, and various basis swaps for 19,162,160 MMbtu of natural gas production in the Cherokee Basin through December 2014. On April 6, 2011, we
executed various commodity swaps for 197,617 Bbls of our oil production through December 2015.

Unit-Based Compensation

For 2011, we do not currently expect to grant any of the units remaining under our Long-Term Incentive Plan and our
2009 Omnibus Incentive Compensation Plan to our non-employee managers, named executive officers, and current key employees, as we have only 336,078 remaining units available under these plans. Instead, the compensation committee and board of
managers granted unit-based awards under our 2009 Omnibus Incentive Compensation Plan to our named executive officers in 2011. These unit-based awards will be settled in cash instead of units and executives may earn between 0% and 200% of the number
of awards granted based on the achievement of absolute CEP unit price targets during a three-year performance period from January 2011 through December 2013. In April 2011, the compensation committee or board of managers, as applicable, awarded
unit-based awards, each with a value of $100, valued at $1,000,000 (10,000 unit-based awards), $350,000 (3,500 unit-based awards), $150,000 (1,500 unit-based awards) and $300,000 (3,000 unit-based awards) under this plan to Messrs. Brunner, Ward and
Hiney and Ms. Mellencamp, respectively. The compensation committee awarded other key employees a total of approximately $1.3 million (approximately 13,000 unit-based awards) in unit-based awards under the plan on May 4, 2011.

CEP unit price targets and corresponding cash payout levels are as follows:



| |  |  | Threshold50% cash payout at $3.50/CEP unit
| | - |  | -------------------------------------------



| |  |  | Target100% cash payout at $4.00/CEP unit
| | - |  | -----------------------------------------



| |  |  | Stretch200% cash payout at $6.00/CEP unit
| | - |  | ------------------------------------------



| |  |  | Cash payouts for results between these points will be interpolated on a linear basis.
| | - |  | -------------------------------------------------------------------------------------

Failure to achieve the threshold CEP unit price will result in no cash payout of the awards granted. The determination of the level of
achievement and number of awards earned will be based on a calculation of CEPs unit price at the end of the performance period. This price calculation will be based on the average of the closing daily prices for the final 20 trading days of
the performance period. In addition, the unit-based awards will vest earlier if any of the following events occur: a change of control, a CEG ownership event, death of the executive, delivery by the Company of a
disability notice with respect to the executive, or an involuntary termination of the executive (with each of the foregoing terms having the corresponding definitions set forth in the respective employment agreement with the
Company). Any cash payment will be made at the end of the performance period except in the case of certain change of control events, which may accelerate payment. The grants will be accounted for in our financial statements as a liability-classified
award with the fair value remeasured each reporting period until settlement. The program is intended to benefit our unitholders by focusing the recipients efforts on increasing our absolute unit price over the performance period.



|Item 2. | Managements Discussion and Analysis of Financial Condition and Results of Operations
|------- | -------------------------------------------------------------------------------------

The following discussion and analysis should be read in conjunction with the financial statements and the summary of significant
accounting policies and notes included herein and in our most recent Annual Report on Form 10-K.

Overview

We are a limited liability company formed by Constellation Energy Group, Inc. (Constellation) on February 7, 2005 to
acquire oil and natural gas properties as well as related midstream assets. At March 31, 2011, our oil and natural gas reserves were located in the Black Warrior Basin of Alabama, the Cherokee Basin of Kansas and Oklahoma, the Woodford Shale in
Oklahoma, and the Central Kansas Uplift in Kansas and Nebraska. Our primary business objective is to create long-term value and to generate stable cash flows allowing us to resume making quarterly distributions to our unitholders. We plan to
achieve our objective by executing our business strategy, which is to:



| |  |  | organically grow our business by increasing reserves and production through what we believe to be low-risk development drilling that focuses on capital
efficient production growth;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | reduce the volatility in our cash flows resulting from changes in oil and natural gas commodity prices and interest rates through efficient hedging
programs;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | improve our liquidity position by reducing our outstanding debt level and actively managing our operating expenses; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------



| |  |  | make accretive acquisitions of oil and natural gas properties characterized by a high percentage of proved developed oil and natural gas reserves with
long-lived, stable production and low-risk drilling opportunities, which may include associated midstream assets such as gathering systems, compression, dehydrating and treating facilities and other similar facilities.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Our future oil and natural gas reserves and production and, therefore, our cash flow and income are highly dependent on our success in
efficiently developing our current reserves and economically finding, developing and acquiring additional recoverable reserves. We may not be able to find, develop or acquire additional reserves to replace our current and future production at
acceptable costs, which could materially adversely affect our business, financial condition and results of operations and our ability to pay quarterly distributions to our unitholders.

We also face the challenge of oil and natural gas production declines. As a given wells initial reservoir pressures are depleted,
oil and natural gas production decreases. We attempt to overcome this natural decline in production by drilling additional wells on our proven undeveloped, probable and possible locations on our existing properties and by acquiring additional
reserves when opportunities arise. We will continue to focus on adding reserves through drilling, well recompletions and right-sized acquisitions, as well as the corresponding costs necessary to produce such reserves. Our ability to add reserves
through drilling is dependent on our capital resources and can be limited by many factors, including our ability to timely obtain drilling permits and regulatory approvals. In accordance with our business plan, we intend to invest the capital
necessary to maintain our production and our asset base over the long term. We seek to maintain or grow our production and our asset base by pursuing both organic growth opportunities and acquisitions of producing oil and natural gas reserves that
are suitable for us.

We completed our initial public offering on November 20, 2006, and our common units, representing
Class B limited liability company interests, are listed on the NYSE Arca, Inc. under the symbol CEP.

Unless the
context requires otherwise, any reference in this Quarterly Report on Form 10-Q to Constellation Energy Partners, we, our, us, CEP, or the Company means Constellation Energy
Partners LLC and its subsidiaries. References in this Quarterly Report on Form 10-Q to Constellation, CCG and CEPM are to Constellation Energy Group, Inc., Constellation Energy Commodities Group, Inc. and
Constellation Energy Partners Management, LLC, respectively.

How We Evaluate our Operations

Non-GAAP Financial MeasureAdjusted EBITDA

We define Adjusted EBITDA as net income (loss) adjusted by:



| |  |  | depreciation, depletion and amortization;
| | - |  | -----------------------------------------



| |  |  | write-off of deferred financing fees;
| | - |  | -------------------------------------



| |  |  | asset impairments;
| | - |  | ------------------



| |  |  | (gain) loss on sale of assets;
| | - |  | ------------------------------



| |  |  | accretion expense;
| | - |  | ------------------



| |  |  | exploration costs;
| | - |  | ------------------



| |  |  | (gain) loss from equity investment;
| | - |  | -----------------------------------



| |  |  | unit based compensation programs;
| | - |  | ---------------------------------



| |  |  | (gain) loss from mark to market activities;
| | - |  | -------------------------------------------



| |  |  | unrealized (gain)/loss on derivatives/hedge ineffectiveness; and
| | - |  | ----------------------------------------------------------------



| |  |  | interest (income) expense, net which includes:
| | - |  | ----------------------------------------------



| | - |  | interest expense
| | - |  | ----------------



| | - |  | interest expense gain/(loss) mark-to-market activities
| | - |  | ------------------------------------------------------



| | - |  | interest (income)
| | - |  | -----------------

Adjusted EBITDA is a significant performance metric used by our management to indicate (prior to the establishment of any cash reserves by our board of managers) the distributions we would expect to pay
to our unitholders. Specifically, this



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financial measure indicates to investors whether or not we are generating cash flow at a level that can sustain or support a quarterly distribution or an increase in our quarterly distribution
rates. Adjusted EBITDA is also used as a quantitative standard by our management and by external users of our financial statements such as investors, research analysts and others to assess:



| |  |  | the financial performance of our assets without regard to financing methods, capital structure or historical cost basis;
| | - |  | ------------------------------------------------------------------------------------------------------------------------



| |  |  | the ability of our assets to generate cash sufficient to pay interest costs and support our indebtedness; and
| | - |  | -------------------------------------------------------------------------------------------------------------



| |  |  | our operating performance and return on capital as compared to those of other companies in our industry, without regard to financing or capital
structure.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------

Our Adjusted EBITDA should not be considered as a substitute for net income, operating income,
cash flows from operating activities or any other measure of financial performance or liquidity presented in accordance with GAAP. Our Adjusted EBITDA excludes some, but not all, items that affect net income and operating income and these measures
may vary among other companies. Therefore, our Adjusted EBITDA may not be comparable to similarly titled measures of other companies.

The following table presents a reconciliation of net income (loss) to Adjusted EBITDA, our most directly comparable GAAP performance measure, for each of the periods presented:



|                                                        |  |                            |        |   |                            |   |         |  
|------------------------------------------------------- |  | -------------------------- | ------ | - | -------------------------- | - | ------- | -
|                                                        |  | For the three months ended |        |   | For the three months ended |  
|                                                        |  | March 31,2011              |        |   | March 31,2010              |  
|                                                        |  | (In 000s)                 |       
|Reconciliation of Net Income (Loss) to Adjusted EBITDA: |  |                            |        |   |                            |   |         |  
|Net income (loss)                                       |  | $                          | (5,152 | ) |                            | $ | 18,058  |  
|Adjusted by:                                            |  |                            |        |   |                            |   |         |  
|Interest expense/(income), net                          |  |                            | 1,852  |   |                            |   | 4,056   |  
|Depreciation, depletion and amortization                |  |                            | 5,865  |   |                            |   | 27,248  |  
|Accretion expense                                       |  |                            | 226    |   |                            |   | 207     |  
|(Gain)/Loss on sale of assets                           |  |                            | 7      |   |                            |   | (8      | )
|Exploration costs                                       |  |                            | 131    |   |                            |   | 223     |  
|Unit-based compensation programs                        |  |                            | 373    |   |                            |   | 437     |  
|(Gain)/Loss on mark-to-market activities                |  |                            | 10,109 |   |                            |   | (35,281 | )
|                                                        |  |                            |        |   |                            |   |         |  
|Adjusted EBITDA                                         |  | $                          | 13,411 |   |                            | $ | 14,940  |  
|                                                        |  |                            |        |   |                            |   |         |  

Significant Operational Factors



| |  |  | Realized Prices.Our average realized price for the three months ended March 31, 2011, including hedge settlements, was $7.57 per Mcfe.
After deducting the cost of sales associated with third party gathering, the average realized prices were $7.42 per Mcfe including hedge settlements and $4.34 per Mcfe excluding hedge settlements.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Production.Our production for the three months ended March 31, 2011, was approximately 3.4 Bcfe, or an average of 38,044 Mcfe per day
compared with approximately 3.9 Bcfe, or an average of 42,889 Mcfe per day for the three months ended March 31, 2010. This 2011 production is lower than the production for the same period in 2010 because our capital spending has been below the
maintenance capital expenditures required to offset the natural production declines associated with our existing wells and severe winter weather in our operating areas during the first quarter of 2011, offset by the impact of our December 2010
acquisition of oil properties in the Central Kansas Uplift.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Capital Expenditures and Drilling Results.During the first quarter of 2011, we spent approximately $1.3 million in cash capital expenditures,
consisting of $1.6 million in development expenditures offset by the receipt of $0.3 million in post-closing adjustments for our December 2010 acquisition of oil properties in the Central Kansas Uplift. We have completed 5 net wells and 15 net
recompletions in the Cherokee Basin during the first quarter of 2011. We had 9 net wells in progress, including 5 in the Black Warrior Basin and 1 in the Central Kansas Uplift, and 5 net recompletions in progress at the end of the quarter.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Hedging Activities. As of March 31, 2011, all of our derivatives are accounted for as mark-to-market activities. For the three months ended
March 31, 2011, the unrealized non-cash mark-to-market loss was approximately
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



21



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##### Table of Contents

| | $10.1 million as compared to an unrealized non-cash mark-to-market gain of $35.3 million for the same period in 2010.
| | ---------------------------------------------------------------------------------------------------------------------

We experience earnings volatility as a result of using the mark-to-market accounting method for our commodity derivatives used to hedge
our exposure to changes in commodity prices or basis differentials. This accounting treatment can cause earnings volatility as the positions for future oil and natural gas production are marked-to-market. These non-cash unrealized gains or losses
are included in our current Statement of Operations until the derivatives are cash settled as the commodities are produced and sold. We do not enter into speculative trading positions and we only use derivatives to lock in the future sales price for
a portion of our expected oil and natural gas production. Increases in the market price of oil or natural gas relative to the fixed future sales price for our hedges result in unrealized, non-cash mark-to-market losses on those derivatives and lower
reported net income. Decreases in the market price of oil or natural gas relative to the fixed future sales price for our hedges result in unrealized, non-cash mark-to-market gains on those derivatives and higher reported net income. Although these
gains and losses are required to be reported immediately in earnings as market prices change, the fair value of the related future physical commodity sale is not marked-to-market and therefore is not reflected as Oil and Gas Sales or as an Accounts
Receivable in our financial statements. This mismatch impacts our reported Results of Operations and our reported working capital position until the commodity derivatives are cash settled and the oil and natural gas is produced and sold. Upon cash
settlement of the derivatives, the sale of the physical commodity at then-current market prices offsets the previously reported mark-to-market gains or losses such that the cumulative net cash realized results in a net sale of the physical oil and
natural gas production at the fixed future sales price for our hedge. When our derivative positions are cash settled as the related commodities are produced and sold, the realized gains and losses of those derivative positions are included in our
Statement of Operations as Oil and Gas Sales. Further detail of our commodity derivative positions and their accounting treatment is outlined below in Cash Flow From Operations-Open Commodity Hedge Positions.



| |  |  | Torch Royalty NPI Litigation Settlement. We have entered into a settlement agreement with the parties to the Torch derivative action litigation,
subject to the approval of the Court. On April 13, 2011, the Court approved the settlement. The anticipated effective date of the settlement is June 13, 2011, absent appeal of the Courts order. The settlement agreement generally
provides for (i) a settlement of all claims in the lawsuit and a mutual release of all claims among the parties through the effective date of the settlement, (ii) an agreement as to the cumulative deficit balance in the NPI account through
September 30, 2010 of approximately $5.8 million, (iii) an amendment to the Water Gathering and Disposal Agreement to establish a $0.53 per barrel fee for a ten year period from the first of the month following the effective date of the
settlement, (iv) payment by RBP II of $1.2 million to reimburse Trust Venture for its fees and expenses in prosecuting the lawsuit, and (v) an irrevocable offer by RBP II to purchase the NPI from the Trust for $1.0 million in an auction of
the NPI by the Trust, subject to the Trust auctioning the NPI within 180 days of the effective date of the settlement, with the purchase price to be held in escrow. The $1.2 million to reimburse Trust Venture for its fees and expenses in prosecuting
the lawsuit is accrued as a current liability in our consolidated balance sheet. Because the NPI was granted to the Trust by a predecessor-in-interest to RBP II, if RBP II is the winning bidder in the auction of the NPI by the Trust, we would expect
the NPI to be extinguished once the NPI is assigned to RBP II by the Trust. If the Trust sells the NPI to another party, the Water Gathering and Disposal Agreement would have a fee of $0.53 a barrel for an additional 10 year term from the first
day of the month following the effective date of the settlement. If we had calculated the NPI for the first quarter of 2011 with the prevailing gas prices during the quarter and the $0.53 a barrel water gathering and disposal fee, the cumulative
deficit balance would have grown to larger than the approximately $6.6 million balance through December 31, 2010.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Constellation Announcement. On April 28, 2011, Exelon Corporation agreed to buy Constellation for approximately $7.9 billion in stock. The
proposed transaction needs approval by state utility regulations in Maryland, New York, and Texas, in addition to the shareholders of both companies and federal regulators. Constellation is our former sponsor and currently owns all of our
outstanding Class A units, approximately 5.9 million Class B common units, all of our Class D interests, and all of the Management Incentive Interests.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Impact of Alabama Tornado. On April 27, 2011, a major EF5 tornado hit Tuscaloosa County, Alabama, which is the core of our operations in
the Black Warrior Basin. Our operations did not sustain major physical damage and none of our employees or their families were injured or killed. However, immediately after the tornado, the southern part of our Black Warrior operations was without
power, causing us to shut-in 265 of our 493 producing wells. Power supplies in the area have largely been restored after major repairs to damaged infrastructure were completed, including repairs to the sub-station serving our operations. We provided
a notice of an event of force majeure to the two purchasers of our natural gas production in Alabama - J.P. Morgan Ventures Energy
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | Corporation and Enterprise Alabama Intrastate, LLC. Our production, which was only lowered by approximately 11 Mmcf, was substantially restored by May 1, 2011. We incurred a limited amount
of additional operating expenses to restore power to our wells and to clean up our lease sites.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Results of Operations

The following table sets forth the selected financial and operating data for the periods indicated:



|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|--------------------------------------------------------------- |  | -------------------------- | ------- | - | -------------------------- | - | ------ | -------------------- |  | - | ------- | - |  |  | ------ | --
|                                                                |  | For the three months ended |         |   | For the three months ended |   |        | 2011 Vs 2010Variance | 
|                                                                |  | March 31, 2011             |         |   | March 31, 2010             |   |        | $                    |  |   | %       |  
|Revenues:                                                       |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Natural gas sales                                               |  | $                          | 23,832  |   |                            | $ | 28,165 |                      |  | $ | (4,333  | ) |  |  | (15.4  | )%
|Oil and liquids sales                                           |  |                            | 2,081   |   |                            |   | 1,072  |                      |  |   | 1,009   |   |  |  | 94.1   | % 
|Gain (Loss) from mark-to-market activities                      |  |                            | (10,109 | ) |                            |   | 35,281 |                      |  |   | (45,390 | ) |  |  | (128.7 | )%
|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Total revenues                                                  |  |                            | 15,804  |   |                            |   | 64,518 |                      |  |   | (48,714 | ) |  |  | (75.5  | )%
|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Operating expenses:                                             |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Lease operating expenses                                        |  |                            | 7,420   |   |                            |   | 7,963  |                      |  |   | (543    | ) |  |  | (6.8   | )%
|Cost of sales                                                   |  |                            | 519     |   |                            |   | 772    |                      |  |   | (253    | ) |  |  | (32.8  | )%
|Production taxes                                                |  |                            | 771     |   |                            |   | 1,125  |                      |  |   | (354    | ) |  |  | (31.5  | )%
|General and administrative expenses                             |  |                            | 4,223   |   |                            |   | 5,062  |                      |  |   | (839    | ) |  |  | (16.6  | )%
|Exploration costs                                               |  |                            | 131     |   |                            |   | 223    |                      |  |   | (92     | ) |  |  | (41.3  | )%
|(Gain) loss on sale of assets                                   |  |                            | 7       |   |                            |   | (8     | )                    |  |   | 15      |   |  |  | (187.5 | )%
|Depreciation, depletion and amortization                        |  |                            | 5,865   |   |                            |   | 27,248 |                      |  |   | (21,383 | ) |  |  | (78.5  | )%
|Accretion expenses                                              |  |                            | 226     |   |                            |   | 207    |                      |  |   | 19      |   |  |  | 9.2    | % 
|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Total operating expenses                                        |  |                            | 19,162  |   |                            |   | 42,592 |                      |  |   | (23,430 | ) |  |  | (55.0  | )%
|Other expenses (income):                                        |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Interest expense                                                |  |                            | 2,523   |   |                            |   | 3,539  |                      |  |   | (1,016  | ) |  |  | (28.7  | )%
|Interest expense (Gain)/loss from mark-to-market activities     |  |                            | (670    | ) |                            |   | 517    |                      |  |   | (1,187  | ) |  |  | (229.6 | )%
|Interest income                                                 |  |                            | (1      | ) |                            |   |       |                      |  |   | (1      | ) |  |  |       |   
|Other (income) expense                                          |  |                            | (58     | ) |                            |   | (188   | )                    |  |   | 130     |   |  |  | (69.1  | )%
|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Total other expenses (income)                                   |  |                            | 1,794   |   |                            |   | 3,868  |                      |  |   | (2,074  | ) |  |  | (53.6  | )%
|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Total expenses                                                  |  |                            | 20,956  |   |                            |   | 46,460 |                      |  |   | (25,504 | ) |  |  | (54.9  | )%
|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Net income (loss)                                               |  | $                          | (5,152  | ) |                            | $ | 18,058 |                      |  | $ | (23,210 | ) |  |  | (128.5 | )%
|                                                                |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|                                                                |  |                            |         |  
|Net production:                                                 |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Natural gas production (MMcf)                                   |  |                            | 3,276   |   |                            |   | 3,774  |                      |  |   | (498    | ) |  |  | (13.2  | )%
|Oil and liquids production (MBbl)                               |  |                            | 25      |   |                            |   | 14     |                      |  |   | 11      |   |  |  | 78.6   | % 
|Total production (MMcfe)                                        |  |                            | 3,424   |   |                            |   | 3,860  |                      |  |   | (436    | ) |  |  | (11.3  | )%
|Average daily production (Mcfe/d)                               |  |                            | 38,044  |   |                            |   | 42,889 |                      |  |   | (4,845  | ) |  |  | (11.3  | )%
|Average sales prices:                                           |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Natural gas price per Mcf with hedge settlements                |  | $                          | 7.27    |   |                            | $ | 7.46   |                      |  | $ | (0.19   | ) |  |  | (2.5   | )%
|Natural gas price per Mcf without hedge settlements             |  | $                          | 4.06    |   |                            | $ | 5.44   |                      |  | $ | (1.38   | ) |  |  | (25.4  | )%
|Oil and liquids price per Bbl                                   |  | $                          | 84.59   |   |                            | $ | 74.97  |                      |  | $ | 9.62    |   |  |  | 12.8   | % 
|Total price per Mcfe with hedge settlements                     |  | $                          | 7.57    |   |                            | $ | 7.57   |                      |  | $ | 0.00    |   |  |  | 0      | % 
|Total price per Mcfe without hedge settlements                  |  | $                          | 4.50    |   |                            | $ | 5.60   |                      |  | $ | (1.10   | ) |  |  | (19.6  | )%
|Average unit costs per Mcfe:                                    |  |                            |         |   |                            |   |        |                      |  |   |         |   |  |  |        |   
|Field operating expenses(a)                                     |  | $                          | 2.39    |   |                            | $ | 2.35   |                      |  | $ | 0.04    |   |  |  | 1.7    | % 
|Lease operating expenses                                        |  | $                          | 2.17    |   |                            | $ | 2.06   |                      |  | $ | 0.11    |   |  |  | 5.3    | % 
|Production taxes                                                |  | $                          | 0.23    |   |                            | $ | 0.29   |                      |  | $ | (0.06   | ) |  |  | (20.7  | )%
|General and administrative expenses                             |  | $                          | 1.23    |   |                            | $ | 1.31   |                      |  | $ | (0.08   | ) |  |  | (6.1   | )%
|General and administrative expenses w/o unit-based compensation |  | $                          | 1.14    |   |                            | $ | 1.21   |                      |  | $ | (0.07   | ) |  |  | (5.8   | )%
|Depreciation, depletion and amortization                        |  | $                          | 1.71    |   |                            | $ | 7.06   |                      |  | $ | (5.35   | ) |  |  | (75.8  | )%





|(a) | Field operating expenses include lease operating expenses (average production costs) and production taxes.
|--- | ----------------------------------------------------------------------------------------------------------



23



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##### Table of Contents

Three months ended March 31, 2011 compared to three months ended March 31, 2010

Oil and natural gas sales. Oil and natural gas sales decreased $3.3 million, or 11.4%, to $25.9 million for the
three months ended March 31, 2011 as compared to $29.2 million for the same period in 2010. Of this decrease, $2.4 million was attributable to decreased natural gas production volumes partially offset by higher oil production volumes while $3.8
million was attributable to lower market prices for our natural gas production, offset by $2.9 million from our hedge program. Production for the three months ended March 31, 2011 was 3.4 Bcfe, which was 0.4 Bcfe lower than the same period in
2010. Of the decrease, 0.4 Bcfe was associated with our properties in the Cherokee Basin, partially offset by increased oil production from our recently acquired properties in the Central Kansas Uplift. Production from our Black Warrior Basin and
Woodford Shale properties remained level. Our first quarter 2011 production was also negatively impacted by severe winter ice and snow storms and record cold temperatures in our operating areas. Also, due to the decrease in the level of our drilling
activities during the past two years, our maintenance drilling programs have not been sufficient to offset the natural decline rate of production associated with our existing wells. We hedged approximately 75% of our actual production during 2011
and approximately 81% of our actual production during the same period in 2010.

As discussed below, the gain from our
unrealized non-cash mark-to-market activities decreased $45.4 million for the three months ended March 31, 2011, as compared to the same period in 2010. Our realized prices before our hedging program decreased from 2010 to 2011 primarily
due to net lower market prices for our production. This was offset by our hedging program and the mark-to-market gains and losses discussed below.

Hedging and mark-to-market activities. As of March 31, 2011, all of our derivatives are accounted for as mark-to-market activities. For the three months ended March 31, 2011, the
unrealized non-cash mark-to-market loss was approximately $10.1 million as compared to an unrealized non-cash $35.3 million gain for the same period in 2010. This 2011 non-cash loss represents approximately $10.5 million from the impact of lower
than expected future natural gas prices on these derivative transactions that are being accounted for as mark-to-market activities offset by a $0.4 million reduction for non-performance risk related to our counterparties.

Cash hedge settlements received for our commodity derivatives were approximately $10.5 million for the three months ended March 31,
2011. Cash hedge settlements received for our commodity derivatives were approximately $7.6 million for the three months ended March 31, 2010. This difference is primarily due to lower market prices for natural gas and lower hedged volumes
during 2011.

Field operating expenses. Our field operating expenses generally consist of lease operating expenses,
labor, vehicle, supervision, transportation, minor maintenance, tools and supplies expenses, as well as production and ad valorem taxes.

For the three months ended March 31, 2011, lease operating expenses decreased $0.6 million, or 6.8%, to $7.4 million, compared to expenses of $8.0 million for the same period in 2010. This decrease
in lease operating expenses is primarily related to $0.4 million in lower expenses in the Cherokee Basin, $0.1 million in lower expenses associated with our Woodford Shale properties and $0.1 million in lower expenses in the Black Warrior Basin. By
category, our lease operating expenses were lower in 2011 as compared to 2010 by $0.6 million because of a decrease of $0.3 million in gas compression, $0.1 million in ad valorem taxes, $0.1 million in labor costs and $0.1 million in road and lease
maintenance.

For the three months ended March 31, 2011, per unit lease operating expenses were $2.17 per Mcfe
compared to $2.06 per Mcfe for the same period in 2010. This increase is attributable to 11.3% lower production in 2011 as compared to the same period in 2010 offset by a decrease in total spending of 6.8% in 2011 as compared to the same period in
2010. Our per unit operating costs increased in the Cherokee Basin from $2.29 per Mcfe in 2010 to $2.53 per Mcfe in 2011 as a result of 0.4 Bcfe in lower production volumes offset by lower total spending. Additionally, during 2011 we were
temporarily impacted by lower production volumes and increased operating costs from weather-related maintenance and repairs.

For the three months ended March 31, 2011, production taxes decreased $0.3 million, or 31.5%, to $0.8 million, compared to expenses
of $1.1 million for the same period in 2010. This decrease was primarily the result of higher market prices for oil and natural gas in 2011 offset by the impact of production taxes on 0.4 Bcfe in lower production.

Cost of sales.For the three months ended March 31, 2011, cost of sales decreased by $0.3 million, or 32.8%, to $0.5 million,
compared to $0.8 million for the same period in 2010. This represents the cost of purchased natural gas in the Cherokee Basin and was impacted by lower production volumes and higher market prices for natural gas, as these costs are tied to natural
gas prices in the Mid-continent region.



24



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General and administrative expenses. General and administrative expenses include the
costs of our employees, related benefits, field office expenses, professional fees, and other costs not directly associated with field operations.

General and administrative expenses decreased $0.8 million, or 16.6%, to $4.2 million for the three months ended March 31, 2011, as compared to $5.0 million for the same period in 2010. Our general
and administrative expenses were lower in 2011 as compared to 2010 because of $0.3 million in lower contract labor and consultant fees, $0.2 million in lower labor and benefits due to lower head count, $0.2 million in lower audit and tax fees, and
$0.1 million in lower non-cash unit-based compensation expenses.

Our per unit costs were $1.23 per Mcfe for the three months
ended March 31, 2011 compared to $1.31 per Mcfe for the same period in 2010. This decrease is attributable to a decrease in total spending of approximately $0.8 million offset by 0.4 Bcfe in lower production.

Exploration Costs.Exploration costs decreased $0.1 million, or 41.3%, to $0.1 million for the three months ended March 31,
2011, as compared to $0.2 million for the same period in 2010. These costs represent abandonments of drilling locations, dry hole costs, delay rentals, geological and geophysical costs, and the impairment, amortization, and abandonment associated
with leases on our unproved properties. The decrease in 2011 is primarily as the result of $0.2 million in lower lease abandonments in Kansas and lower exploration costs in 2011 due to the impairment of certain unproved properties in the third
quarter of 2010 because of lower expected future natural gas prices, offset by one dry hole costing $0.1 million in 2011.

Gain/loss on sale of asset.Our gain/loss on the sale of assets decreased $0.02 million, or 187.5%, to less than a $0.01 million
loss for the three months ended March 31, 2011, as compared to a gain of less than $0.01 million for the same period in 2010. In 2011, we sold surplus equipment at a gain of less than $0.02 million.

Depreciation, depletion and amortization expense. Depreciation, depletion and amortization expenses include the depreciation,
depletion and amortization of acquisition costs and equipment costs. Depletion is calculated using units-of-production. Assuming everything else remains unchanged, as natural gas production changes, depletion would change in the same direction.

Our depreciation, depletion and amortization expense for the three months ended March 31, 2011 was $5.9 million, or
$1.71 per Mcfe, compared to $27.3 million, or $7.06 per Mcfe, for the same period in 2010. This decrease in 2011 depreciation, depletion, and amortization reflects the decreased basis in our assets resulting from our 2010 impairments of our oil and
natural gas properties, an increase in our reserve base primarily due to price-related reserve revisions, capital expenditures for our development drilling programs, the acquisition of additional oil properties in the Central Kansas Uplift in
December 2010, and a 0.4 Bcfe decrease in production volumes during 2011 as compared to 2010. We calculate depletion using units-of-production under the successful efforts method of accounting. Our other assets are depreciated using the straight
line basis. Consistent with our prior practice, we will use our 2010 reserve report to calculate our depletion rate during the first three quarters of 2011. We expect our average depletion rate during the first three quarters of 2011 to be
approximately $1.75 per Mcfe, which reflects our acquisition of our oil properties in the Central Kansas Uplift. We will use our 2011 reserve report to record our depletion in the fourth quarter of 2011.

Interest expense. Interest expense for the three months ended March 31, 2011 decreased $2.2 million to $1.9 million as
compared to approximately $4.1 million in interest expense for the same period in 2010. This decrease was primarily due to $1.2 million in lower non-cash mark-to-market losses on our interest rate swaps that are accounted for as mark-to-market
activities, lower interest rate swap settlements of $0.7 million and lower amortization of debt issue costs of $0.3 million, while capitalized interest essentially remained level during 2011 as compared to the same period in 2010. During 2010 and
2011, we used our excess operating cash flow to reduce our total debt from $185.0 million to $157.5 million. At March 31, 2011, we had an outstanding balance under our reserve-based credit facility of $157.5 million as compared to $185.0
million at March 31, 2010. The average interest rate on our outstanding debt was approximately 4.9% in 2011 compared to 5.9% in 2010.

Interest income. Interest income for the three months ended March 31, 2011, was less than $0.01 million as compared to zero for the same period in 2010. During 2011, market rates for overnight
investments continued to be at historical lows, resulting in no significant earnings on our cash balances.

Accumulated
other comprehensive income. Accumulated other comprehensive income, shown on our consolidated balance sheets, reflects the changes in the fair market value of our previously designated cash-flow hedge positions. At March 31, 2011, the
balance was an unrealized gain of $10.2 million compared to an unrealized gain of $10.9 million at



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December 31, 2010. This decrease reflects the amortization to earnings as the derivative positions that were previously accounted for as cash flow hedges settled during the first quarter of
2011.

The change in Accumulated other comprehensive income (loss) is shown in our consolidated statements of operations and
comprehensive income (loss) as an unrealized loss of $0.7 million for the three months ended March 31, 2011, and as an unrealized loss of $5.3 million for the same period in 2010. This decrease reflects the settlements during 2011 related to
amounts previously included in locked accumulated other comprehensive income associated with our hedging positions previously accounted for as cash flow hedges. All of our derivative positions are now accounted for as mark-to-market activities and
the remaining balance in Accumulated other comprehensive income (loss) will be amortized to earnings as the positions settle in the future.

Liquidity and Capital Resources

During 2010 and 2011, we utilized our cash flow from operations as our primary source of capital. Our primary use of capital during this time was for the retirement of outstanding debt, the development of
existing oil and natural gas properties in the Cherokee Basin and the acquisition of non-operated oil properties in the Central Kansas Uplift.

Based upon our current business plan for 2011, we anticipate that we will continue to generate operating cash flows in excess of our working capital needs and planned capital expenditures. The primary
focus of our business plan in 2011 will be to use our excess operating cash flows to further reduce our outstanding debt level. As we pursue our business plan, we will be monitoring the capital resources available to us to meet our future financial
obligations and planned limited maintenance capital expenditures. Our current expectation is that we will manage our business to operate within the cash flows that are generated. We forecast that capital expenditures will range between approximately
$10.0 million to $12.0 million in the Black Warrior Basin and Cherokee Basin during 2011. Based on the initial progress in drilling our oil prospects, we believe we will finish the year at the high end of our capital forecast, and continued success
in the drilling of our oil prospects may lead us to seek authorization from our board of managers to increase our capital budget to further exploit oil potential in our asset base. Our current forecast for capital expenditures, together with any
increase in capital spending we may ultimately request from the board of managers, is expected to be lower than the $23.0 million in maintenance capital expenditures required to maintain our production levels in 2011. Because we expect to reduce our
maintenance capital expenditures in 2011, and also reduced them in 2010, we expect lower production levels and lower operating cash flows in 2011. Our future success in growing reserves and production will be highly dependent on the capital
resources available to us and our success in drilling for or acquiring additional reserves and managing the costs associated with our operations. We routinely monitor and adjust our capital expenditures and operating expenses in response to changes
in oil and natural gas prices, drilling and acquisition costs, industry conditions, availability of funds under our reserve-based credit facility, and internally generated cash flow. Based upon current oil and natural gas price expectations, our
existing hedge positions and expected production levels in 2011, we anticipate that our cash flow from operations will decrease from 2010 levels. However, we expect that we will meet any planned capital expenditures and other cash requirements for
the next twelve months without increasing our debt or issuing additional equity securities. In 2011, we expect that our excess operating cash flows will be used to reduce our outstanding debt level, which may provide us with additional liquidity
from the available borrowing base under our reserve-based credit facility. However, future cash flows and our borrowing capacity are subject to a number of variables, including the level of oil and natural gas production and market prices for those
products. There can be no assurance that operations and other capital resources will provide cash in sufficient amounts to maintain planned levels of capital expenditures or operating expenses.

Our results will not be fully impacted by significant increases or decreases in oil and natural gas prices because of our hedging
program. In the event of inflation increasing drilling and service costs, our hedging program will also limit our ability to have increased revenues recoup the higher costs, which could further impact our planned capital spending or operating
expense levels. For 2011, we forecast total net production of between 13.4 Bcfe and 14.2 Bcfe. We have hedged approximately 74% of the midpoint of this forecast, including hedges on 7.6 Bcfe of our Mid-continent natural gas production at an average
price, including basis, of $7.87 per Mcfe and an additional 2.4 Bcfe of our remaining natural gas production at a NYMEX-only price of $8.51 per Mcfe and 38 MBbl of our oil production at an average price of $110.10 per barrel. This attractive hedge
position locks in a significant portion of our expected operating cash flows for 2011 although we are still exposed to increases or decreases in oil and natural gas prices on our unhedged volumes.

During 2011, we intend to use any surplus operating cash flows to further reduce our debt level. Given our focus on debt reduction, we
anticipate that our distribution will remain suspended through the fourth quarter of 2011. We expect that the suspension of our quarterly distribution and maintaining our total planned capital expenditures below maintenance levels in 2011 will
provide additional liquidity to fund our operations and to pay down debt. Since we first shifted our strategic focus to debt reduction, we have successfully reduced our outstanding debt balances from a high of $220.0 million to $157.5 million. Our
available cash is reduced by any cash reserves established by our board of managers for the proper conduct of



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our business and the payment of fees and expenses. As of March 31, 2011, we were restricted from paying distributions to unitholders as we had no available cash (taking into account the cash
reserves set by our board of managers for the proper conduct of our business) from which to pay distributions. We are subject to borrowing base redeterminations, which are scheduled to occur semi-annually or more frequently at the discretion of our
lenders, and cannot forecast the level at which our lenders may set our borrowing base in the future. However, provided that our outstanding debt balance, net of available cash, is less than 90% of our borrowing base as determined by our lenders and
at such time we are able to resume maintenance capital expenditures and have available cash, we will evaluate the resumption of our quarterly distribution to unitholders. This evaluation will consider our outstanding borrowings and cash reserves
that are set by our board of managers for the proper conduct of our business. Any future quarterly distributions must be approved by our board of managers.

Our reserve-based credit facility currently provides a limited availability to finance future maintenance capital expenditures and other working capital needs. During the first three months of 2011, we
did not borrow any daily short-term or any additional long-term amounts under our reserve-based credit facility. As of May 6, 2011, our borrowing base under our reserve-based credit facility was $195.0 million and we had $157.5 million of debt
outstanding under the facility leaving $37.5 million in unused borrowing capacity. Our current reserve-based credit facility is subject to future borrowing base redeterminations and will have to be renewed or replaced before its maturity in November
2012. We expect to lower our outstanding debt levels by an additional $17.5 million to $22.5 million during the remainder of 2011. Our reserve-based credit facility is discussed below in further detail.

In the first quarter of 2011, we filed a new shelf registration statement with the SEC to register up to $500 million of debt or equity
securities to repay or refinance outstanding debt and to fund working capital, capital expenditures and acquisitions. This registration statement will expire in three years. There is no guarantee that securities can or will be issued under the
registration statement or that conditions in the financial markets would be supportive of an issuance of such securities by us.

Reserve-based credit facility

On November 13, 2009, we entered into an amended and restated $350.0 million reserve-based credit facility with The Royal Bank of Scotland plc as administrative agent and a syndicate of lenders. The
reserve-based credit facility amends, extends, and consolidates our previous reserve-based credit facilities and matures on November 13, 2012. Borrowings under the reserve-based credit facility are secured by various mortgages of oil and
natural gas properties that we and certain of our subsidiaries own as well as various security and pledge agreements among us and certain of our subsidiaries and the administrative agent. The current lenders and their percentage commitments in the
reserve-based credit facility are: The Royal Bank of Scotland plc (26.84%), BNP Paribas (21.95%), The Bank of Nova Scotia (21.95%), Wells Fargo Bank, N.A. (14.63%), and Societe Generale (14.63%).

The amount available for borrowing at any one time under the reserve-based credit facility is limited to the borrowing base for our oil
and natural gas properties. As of May 6, 2011, our borrowing base was $195.0 million. The borrowing base is redetermined semi-annually, and may be redetermined at our request more frequently and by the lenders, in their sole discretion, based
on reserve reports as prepared by petroleum engineers, together with, among other things, the oil and natural gas prices prevailing at such time. Our next semi-annual borrowing base redetermination is scheduled during the second quarter of 2011.
Outstanding borrowings in excess of our borrowing base must be repaid or we must pledge other oil and natural gas properties as additional collateral. We may elect to pay any borrowing base deficiency in three equal monthly installments such that
the deficiency is eliminated in a period of three months. Any increase in our borrowing base must be approved by all of the lenders.

Borrowings under the reserve-based credit facility are available for acquisition, exploration, operation and maintenance of oil and natural gas properties, payment of expenses incurred in connection with
the reserve-based credit facility, working capital and general limited liability company purposes. The reserve-based credit facility has a sub-limit of $20.0 million which may be used for the issuance of letters of credit. As of May 6, 2011, no
letters of credit are outstanding.

At our election, interest for borrowings are determined by reference to (i) the
London interbank rate, or LIBOR, plus an applicable margin between 2.50% and 3.50% per annum based on utilization or (ii) a domestic bank rate (ABR) plus an applicable margin between 1.50% and 2.50% per annum based on
utilization plus (iii) a commitment fee of 0.50% per annum based on the unutilized borrowing base. Interest on the borrowings for ABR loans and the commitment fee are generally payable quarterly. Interest on the borrowings for LIBOR loans
are generally payable at the applicable maturity date.

The reserve-based credit facility contains various covenants that
limit, among other things, our ability and certain of our subsidiaries ability to incur certain indebtedness, grant certain liens, merge or consolidate, sell all or substantially all of our assets, make certain loans, acquisitions, capital
expenditures and investments, and pay distributions.



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In addition, we are required to maintain (i) a ratio of Total Net Debt (defined as Debt
(generally indebtedness permitted to be incurred by us under the reserve-based credit facility) less Available Cash (generally, cash, cash equivalents, and cash reserves of the Company)) to Adjusted EBITDA (defined as, for any period, the sum of
consolidated net income for such period plus (minus) the following expenses or charges to the extent deducted from consolidated net income in such period: interest expense, depreciation, depletion, amortization, write-off of deferred financing fees,
impairment of long-lived assets, (gain) loss on sale of assets, exploration costs, (gain) loss from equity investment, accretion of asset retirement obligation, unrealized (gain) loss on derivatives and realized (gain) loss on cancelled derivatives,
and other similar charges) of not more than 3.50 to 1.0; (ii) Adjusted EBITDA to cash interest expense of not less than 2.5 to 1.0; and (iii) consolidated current assets, including the unused amount of the total commitments but excluding
current non-cash assets, to consolidated current liabilities, excluding non-cash liabilities and current maturities of debt (to the extent such payments are not past due), of not less than 1.0 to 1.0, all calculated pursuant to the requirements
under SFAS 133 and SFAS 143 (including the current liabilities in respect of the termination of natural gas and interest rate swaps). All financial covenants are calculated using our consolidated financial information.

The reserve-based credit facility also includes customary events of default, including events of default relating to non-payment of
principal, interest or fees, inaccuracy of representations and warranties in any material respect when made or when deemed made, violation of covenants, cross-defaults, bankruptcy and insolvency events, certain unsatisfied judgments, guaranties not
being valid under the reserve-based credit facility and a change of control. If an event of default occurs, the lenders will be able to accelerate the maturity of the reserve-based credit facility and exercise other rights and remedies. The
reserve-based credit facility contains a condition to borrowing and a representation that no material adverse effect (MAE) has occurred, which includes, among other things, a material adverse change in, or material adverse effect on the
business, operations, property, liabilities (actual or contingent) or condition (financial or otherwise) of us and our subsidiaries who are guarantors taken as a whole. If a MAE were to occur, we would be prohibited from borrowing under the
reserve-based credit facility and would be in default, which could cause all of our existing indebtedness to become immediately due and payable.

We have the ability to pay distributions to unitholders from available cash, including cash from borrowings under the reserve-based credit facility, as long as no event of default exists and provided that
no distributions to unitholders may be made if the borrowings outstanding, net of available cash, under the reserve-based credit facility exceed 90% of the borrowing base, after giving effect to the proposed distribution. Our available cash is
reduced by any cash reserves established by our board of managers for the proper conduct of our business and the payment of fees and expenses. As of May 6, 2011, we were restricted from paying distributions to unitholders as we had no available
cash (taking into account the cash reserves set by our board of managers for the proper conduct of our business) from which to pay distributions.

The reserve-based credit facility permits us to hedge our projected monthly production, provided that (a) for the immediately ensuing twelve month period, the volumes of production hedged in any
month may not exceed our reasonable business judgment of the production for such month consistent with the application of petroleum engineering methodologies for estimating proved developed producing reserves based on the then-current strip pricing
(provided that such projection shall not be more than 115% of the proved developed producing reserves forecast for the same period derived from the most recent reserve report of our petroleum engineers using the then strip pricing), and (b) for
the period beyond twelve months, the volumes of production hedged in any month may not exceed the reasonably anticipated projected production from proved developed producing reserves estimated by our petroleum engineers. The reserve-based credit
facility also permits us to hedge the interest rate on up to 90% of the then-outstanding principal amounts of our indebtedness for borrowed money.

The reserve-based credit facility contains no covenants related to our relationship with Constellation or Constellations right to appoint all of the Class A managers of our board of managers.

At March 31, 2011, we believe that we were in compliance with the financial covenants contained in our reserve-based
credit facility. We monitor compliance on an ongoing basis. As of March 31, 2011, our actual Total Net Debt to annual Adjusted EBITDA ratio was 2.9 to 1.0 as compared with a required ratio of not greater than 3.5 to 1.0, our actual ratio of
consolidated current assets to consolidated current liabilities was 4.6 to 1.0 as compared with a required ratio of not less than 1.0 to 1.0, and our actual quarterly Adjusted EBITDA to cash interest expense ratio was 8.7 to 1.0 as compared with a
required ratio of not less than 2.5 to 1.0.

If we are unable to remain in compliance with the debt covenants associated with
our reserve-based credit facility or maintain the required ratios discussed above, we could request waivers from the lenders in our bank group. Although the lenders may not provide a waiver, we could take additional steps in the event of not meeting
the required ratios or in the event of a reduction in the borrowing base below as determined by the lenders. During 2011, we intend to use our surplus operating cash flows to reduce our outstanding debt. If it becomes necessary to reduce debt by
amounts that exceed our operating cash flows, we could further reduce capital expenditures, continue to suspend our quarterly distributions to unitholders, sell oil and natural gas properties, liquidate in-the-money derivative positions, further
reduce operating and



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administrative costs, or take additional steps to increase liquidity. If we become unable to obtain a waiver and were unsuccessful at reducing our debt to the necessary level, our debt could
become due and payable upon acceleration by the lenders. To the extent that we do not enter into an agreement to refinance or extend the due date on the reserve-based credit facility, the outstanding debt balance at November 13, 2011, will
become a current liability.

We have hedging arrangements to reduce the impact of changes in the LIBOR interest rate on our
interest payments for $93.0 million of the $157.5 million outstanding on our reserve-based credit facility at May 6, 2011. These positions are outlined below in Cash Flow From Operations-Open Commodity Hedge Positions.

Cash Flow from Operations

Our net cash flow provided by operating activities for the three months ended March 31, 2011 was $8.1 million, compared to net cash
flow provided by operating activities of $8.0 million for the same period in 2010. This increase in operating cash flow was primarily attributable to lower operating expenses as a result of $1.4 million in lower total spending in both administrative
and lease operating expenses, the impact of our acquisition of oil properties in the Central Kansas Uplift, and the impact of lower oil and natural gas sales of $3.3 million as the result of 0.4 Bcfe in lower natural gas production in 2011. During
2011, our operating cash flows were increased by $9.9 million related to cash hedge settlements for our natural gas commodity and interest rate derivatives. Our change in working capital from 2010 to 2011 was impacted by lower accrued liabilities of
$3.4 million, higher accounts payable of $0.3 million, lower royalties payable of $0.1 million, lower accounts receivable of $0.1 million and lower prepaid expenses of $0.3 million. Our accrued liabilities decreased with the payments associated with
our 2010 incentive compensation programs. Our accounts payable increased due to timing of invoice payments. Our receivables balance and our royalties payable balance both decreased due to lower production volumes for our estimated natural gas sales
due to a weather-related decrease in production during the first quarter of 2011. The decrease in prepaid expenses of $0.3 million primarily resulted from the timing of the payment for insurance expenses.

Our cash flow from operations is subject to many variables, the most significant of which are the volatility of oil and natural gas
prices and our level of production of oil and natural gas. Oil and natural gas prices are determined primarily by prevailing market conditions, which are dependent on regional and worldwide economic activity, weather and other factors beyond our
control. Our future cash flow from operations will depend on our ability to maintain and increase production through our development program or completing acquisitions, as well as the market prices of oil and natural gas and our hedging program. For
additional information on our business plan, refer to Outlook.

Open Commodity Hedge Positions

We enter into hedging arrangements to reduce the impact of oil and natural gas price volatility on our operations. By
removing the price volatility from a significant portion of our oil and natural gas production, we have mitigated, but not eliminated, the potential effects of changing prices on our cash flow from operations for those periods. While mitigating the
negative effects of falling commodity prices, these derivative contracts also limit the benefits we might otherwise receive from increases in commodity prices. These derivative contracts also limit our ability to have additional cash flows to fund
higher severance taxes, which are usually based on market prices for oil and natural gas. Our operating cash flows are also impacted by the cost of oilfield services. In the event of inflation increasing service costs or administrative expenses, our
hedging program will limit our ability to have increased operating cash flows to fund these higher costs. Increases in the market prices for oil and natural gas will also increase our need for working capital as our commodity hedging contracts cash
settle prior to our receipt of cash from our sales of the related commodities to third parties.

It is our policy to enter
into derivative contracts only with counterparties that are creditworthy financial institutions deemed by management as competent and competitive market makers. Each of the counterparties to our derivative contracts is a lender in our reserve-based
credit facility and we do not post collateral with our counterparties under any of these agreements. This is significant since we are able to lock in attractive sales prices on a substantial amount of our expected future production without posting
cash collateral based on price changes prior to the hedges being cash settled.

The following tables summarize, for the
periods indicated, our hedges currently in place through December 31, 2014. All of these derivatives are accounted for as mark-to-market activities.



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MTM Fixed Price SwapsNYMEX



|     |  |                                  |           |  |              |   |      |          |  |  |              |  |  |        |      |  |              |  |           |        |  |   |              |  |  |        |           |  |              |   |      |  |  |  |            |  |  |   |      | 
|---- |  | -------------------------------- | --------- |  | ------------ | - | ---- | -------- |  |  | ------------ |  |  | ------ | ---- |  | ------------ |  | --------- | ------ |  | - | ------------ |  |  | ------ | --------- |  | ------------ | - | ---- |  |  |  | ---------- |  |  | - | ---- | 
|     |  | For the quarter ended (in MMBtu) |          
|     |  | March 31,                        |           |  | June 30,     |   |      | Sept 30, |  |  | Dec 31,      |  |  | Total  |     
|     |  | Volume                           |           |  | AveragePrice |   |      | Volume   |  |  | AveragePrice |  |  | Volume |      |  | AveragePrice |  |           | Volume |  |   | AveragePrice |  |  | Volume |           |  | AveragePrice |  
|2011 |  |                                  |           |  |              |   |      |          |  |  | 2,425,000    |  |  | $      | 8.55 |  |              |  | 2,220,000 |        |  | $ | 8.45         |  |  |        | 2,220,000 |  |              | $ | 8.45 |  |  |  | 6,865,000  |  |  | $ | 8.49 | 
|2012 |  |                                  | 2,227,500 |  |              | $ | 8.34 |          |  |  | 2,227,500    |  |  | $      | 8.34 |  |              |  | 2,250,000 |        |  | $ | 8.34         |  |  |        | 2,250,000 |  |              | $ | 8.34 |  |  |  | 8,955,000  |  |  | $ | 8.34 | 
|2013 |  |                                  | 2,025,000 |  |              | $ | 7.33 |          |  |  | 2,079,500    |  |  | $      | 7.32 |  |              |  | 2,070,000 |        |  | $ | 7.33         |  |  |        | 2,038,000 |  |              | $ | 7.34 |  |  |  | 8,212,500  |  |  | $ | 7.33 | 
|2014 |  |                                  | 1,575,000 |  |              | $ | 7.03 |          |  |  | 1,592,500    |  |  | $      | 7.03 |  |              |  | 1,610,000 |        |  | $ | 7.03         |  |  |        | 1,610,000 |  |              | $ | 7.03 |  |  |  | 6,387,500  |  |  | $ | 7.03 | 
|     |  |                                  |           |  |              |   |      |          |  |  |              |  |  |        |      |  |              |  |           |        |  |   |              |  |  |        |           |  |              |   |      |  |  |  |            |  |  |   |      | 
|     |  |                                  |           |  |              |   |      |          |  |  |              |  |  |        |      |  |              |  |           |        |  |   |              |  |  |        |           |  |              |   |      |  |  |  | 30,420,000 |  |  |   |      | 
|     |  |                                  |           |  |              |   |      |          |  |  |              |  |  |        |      |  |              |  |           |        |  |   |              |  |  |        |           |  |              |   |      |  |  |  |            |  |  |   |      | 

MTM Fixed Price SwapsCenterPoint Energy Gas Transmission (East)



|     |  |                                  |  |  |              |  |  |          |  |  |              |  |  |        |      |  |              |  |         |        |  |   |              |  |  |        |         |  |              |   |      |  |  |  |         |  |  |   |      | 
|---- |  | -------------------------------- |  |  | ------------ |  |  | -------- |  |  | ------------ |  |  | ------ | ---- |  | ------------ |  | ------- | ------ |  | - | ------------ |  |  | ------ | ------- |  | ------------ | - | ---- |  |  |  | ------- |  |  | - | ---- | 
|     |  | For the quarter ended (in MMBtu) | 
|     |  | March 31,                        |  |  | June 30,     |  |  | Sept 30, |  |  | Dec 31,      |  |  | Total  |     
|     |  | Volume                           |  |  | AveragePrice |  |  | Volume   |  |  | AveragePrice |  |  | Volume |      |  | AveragePrice |  |         | Volume |  |   | AveragePrice |  |  | Volume |         |  | AveragePrice |  
|2011 |  |                                  |  |  |              |  |  |          |  |  | 180,000      |  |  | $      | 7.93 |  |              |  | 180,000 |        |  | $ | 7.93         |  |  |        | 180,000 |  |              | $ | 7.93 |  |  |  | 540,000 |  |  | $ | 7.93 | 
|     |  |                                  |  |  |              |  |  |          |  |  |              |  |  |        |      |  |              |  |         |        |  |   |              |  |  |        |         |  |              |   |      |  |  |  |         |  |  |   |      | 
|     |  |                                  |  |  |              |  |  |          |  |  |              |  |  |        |      |  |              |  |         |        |  |   |              |  |  |        |         |  |              |   |      |  |  |  | 540,000 |  |  |   |      | 
|     |  |                                  |  |  |              |  |  |          |  |  |              |  |  |        |      |  |              |  |         |        |  |   |              |  |  |        |         |  |              |   |      |  |  |  |         |  |  |   |      | 

MTM Fixed Price Basis Swaps CenterPoint Energy Gas Transmission (East), ONEOK Gas
Transportation (Oklahoma), or Southern Star Central Gas Pipeline (Texas, Oklahoma, and Kansas)



|     |  |                                  |           |  |                   |   |      |          |  |  |                   |  |  |        |      |  |                   |  |           |        |  |   |                   |  |  |        |           |  |                   |   |      |  |  |  |            |  |  |   |      | 
|---- |  | -------------------------------- | --------- |  | ----------------- | - | ---- | -------- |  |  | ----------------- |  |  | ------ | ---- |  | ----------------- |  | --------- | ------ |  | - | ----------------- |  |  | ------ | --------- |  | ----------------- | - | ---- |  |  |  | ---------- |  |  | - | ---- | 
|     |  | For the quarter ended (in MMBtu) |          
|     |  | March 31,                        |           |  | June 30,          |   |      | Sept 30, |  |  | Dec 31,           |  |  | Total  |     
|     |  | Volume                           |           |  | WeightedAverage $ |   |      | Volume   |  |  | WeightedAverage $ |  |  | Volume |      |  | WeightedAverage $ |  |           | Volume |  |   | WeightedAverage $ |  |  | Volume |           |  | WeightedAverage $ |  
|2011 |  |                                  |           |  |                   |   |      |          |  |  | 1,823,324         |  |  | $      | 0.65 |  |                   |  | 1,703,467 |        |  | $ | 0.62              |  |  |        | 1,393,700 |  |                   | $ | 0.68 |  |  |  | 4,920,491  |  |  | $ | 0.65 | 
|2012 |  |                                  | 1,502,800 |  |                   | $ | 0.58 |          |  |  | 1,427,100         |  |  | $      | 0.59 |  |                   |  | 1,352,900 |        |  | $ | 0.61              |  |  |        | 1,295,900 |  |                   | $ | 0.62 |  |  |  | 5,578,700  |  |  | $ | 0.60 | 
|2013 |  |                                  | 1,245,400 |  |                   | $ | 0.40 |          |  |  | 1,192,900         |  |  | $      | 0.40 |  |                   |  | 1,145,700 |        |  | $ | 0.40              |  |  |        | 1,104,400 |  |                   | $ | 0.40 |  |  |  | 4,688,400  |  |  | $ | 0.40 | 
|2014 |  |                                  | 1,053,465 |  |                   | $ | 0.40 |          |  |  | 1,010,529         |  |  | $      | 0.40 |  |                   |  | 971,508   |        |  | $ | 0.40              |  |  |        | 939,067   |  |                   | $ | 0.40 |  |  |  | 3,974,569  |  |  | $ | 0.40 | 
|     |  |                                  |           |  |                   |   |      |          |  |  |                   |  |  |        |      |  |                   |  |           |        |  |   |                   |  |  |        |           |  |                   |   |      |  |  |  |            |  |  |   |      | 
|     |  |                                  |           |  |                   |   |      |          |  |  |                   |  |  |        |      |  |                   |  |           |        |  |   |                   |  |  |        |           |  |                   |   |      |  |  |  | 19,162,160 |  |  |   |      | 
|     |  |                                  |           |  |                   |   |      |          |  |  |                   |  |  |        |      |  |                   |  |           |        |  |   |                   |  |  |        |           |  |                   |   |      |  |  |  |            |  |  |   |      | 

MTM Fixed Price Basis SwapsWest Texas Intermediate (WTI)



|     |  |                                 |        |  |              |   |        |          |  |  |              |  |  |        |        |  |              |  |        |        |  |   |              |  |  |        |        |  |              |   |        |  |  |  |         |  |  |   |        | 
|---- |  | ------------------------------- | ------ |  | ------------ | - | ------ | -------- |  |  | ------------ |  |  | ------ | ------ |  | ------------ |  | ------ | ------ |  | - | ------------ |  |  | ------ | ------ |  | ------------ | - | ------ |  |  |  | ------- |  |  | - | ------ | 
|     |  | For the quarter ended (in Bbls) |       
|     |  | March 31,                       |        |  | June 30,     |   |        | Sept 30, |  |  | Dec 31,      |  |  | Total  |       
|     |  | Volume                          |        |  | AveragePrice |   |        | Volume   |  |  | AveragePrice |  |  | Volume |        |  | AveragePrice |  |        | Volume |  |   | AveragePrice |  |  | Volume |        |  | AveragePrice |  
|2011 |  |                                 |        |  |              |   |        |          |  |  | 5,852        |  |  | $      | 110.10 |  |              |  | 16,545 |        |  | $ | 110.10       |  |  |        | 15,278 |  |              | $ | 110.10 |  |  |  | 37,675  |  |  | $ | 110.10 | 
|2012 |  |                                 | 14,183 |  |              | $ | 108.00 |          |  |  | 13,262       |  |  | $      | 108.00 |  |              |  | 12,520 |        |  | $ | 108.00       |  |  |        | 11,881 |  |              | $ | 108.00 |  |  |  | 51,846  |  |  | $ | 108.00 | 
|2013 |  |                                 | 11,298 |  |              | $ | 104.32 |          |  |  | 10,720       |  |  | $      | 104.32 |  |              |  | 10,197 |        |  | $ | 104.32       |  |  |        | 9,743  |  |              | $ | 104.32 |  |  |  | 41,958  |  |  | $ | 104.32 | 
|2014 |  |                                 | 9,317  |  |              | $ | 102.25 |          |  |  | 8,959        |  |  | $      | 102.25 |  |              |  | 8,652  |        |  | $ | 102.25       |  |  |        | 8,367  |  |              | $ | 102.25 |  |  |  | 35,295  |  |  | $ | 102.25 | 
|2015 |  |                                 | 8,095  |  |              | $ | 101.10 |          |  |  | 7,834        |  |  | $      | 101.10 |  |              |  | 7,588  |        |  | $ | 101.10       |  |  |        | 7,326  |  |              | $ | 101.10 |  |  |  | 30,843  |  |  | $ | 101.10 | 
|     |  |                                 |        |  |              |   |        |          |  |  |              |  |  |        |        |  |              |  |        |        |  |   |              |  |  |        |        |  |              |   |        |  |  |  |         |  |  |   |        | 
|     |  |                                 |        |  |              |   |        |          |  |  |              |  |  |        |        |  |              |  |        |        |  |   |              |  |  |        |        |  |              |   |        |  |  |  | 197,617 |  |  |   |        | 
|     |  |                                 |        |  |              |   |        |          |  |  |              |  |  |        |        |  |              |  |        |        |  |   |              |  |  |        |        |  |              |   |        |  |  |  |         |  |  |   |        | 

Investing ActivitiesAcquisitions and Capital Expenditures

Cash used in investing activities was $1.2 million for the three months ended March 31, 2011, compared to $0.6 million for the same
period in 2010. Our cash capital expenditures were $1.6 million in 2011, which primarily consisted of development expenditures in the Cherokee Basin and in the Black Warrior Basin. During the first quarter of 2011, we have completed 5 net wells and
15 net recompletions in the Cherokee Basin. We had 9 net wells in progress and 5 net recompletions in progress at the end of the quarter. Five of the wells in progress are in the Black Warrior Basin and 1 of the



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wells is in the Central Kansas Uplift. We also received $0.3 million in post-closing adjustments related to our acquisition of oil properties in the Central Kansas Uplift and received $0.1
million in distributions from an equity affiliate.

Our capital expenditures were $0.7 million for the three months ended
March 31, 2010, which primarily related to the acquisition of additional interests in seven natural gas wells in the Cherokee Basin and in the Black Warrior Basin. During the first three months of 2010, we did not drill and complete any net
wells or any net recompletions. We began our drilling activities in the Cherokee Basin during the second quarter of 2010. We did not resume drilling in the Black Warrior Basin during 2010. We also received $0.1 million in distributions from an
equity affiliate.

We currently anticipate our total capital budget for 2011 will be at the high end of our $10.0 million to
$12.0 million forecast. This 2011 capital budget primarily consists of capital for drilling wells and recompletions and also includes amounts for infrastructure projects, equipment, and inventory. Based on the initial progress in drilling our oil
prospects, we believe we will finish the year at the high end of our capital forecast, and continued success in the drilling of our oil prospects may lead us to seek authorization from our board of managers to increase our capital budget to further
exploit oil potential in our asset base.

The current 2011 capital budget, together with any increase in capital spending we
may ultimately request from the board of managers, is expected to be below our 2011 estimated maintenance capital level of $23.0 million and our 2010 estimated maintenance capital level of $25.3 million. We expect that our current and future capital
expenditures will continue to be funded using our cash flow from operations. We believe this decreased level of maintenance capital spending will result in lower production volumes in 2011. Once market conditions warrant, we expect to evaluate the
resumption of capital spending at a level sufficient to maintain our then current production rate. Given the proportion of natural gas relative to oil in our asset base, we believe that natural gas prices in excess of $6.00 per Mcfe produce rates of
return that generally support capital spending at maintenance levels.

The amount and timing of our capital expenditures is
largely discretionary and within our control. If natural gas prices decline to levels below acceptable levels, and the borrowing base under our reserve-based credit facility is further reduced, drilling costs escalate, or our efforts to exploit oil
potential in our asset base prove to be unsuccessful, we could choose to defer a portion of these planned capital expenditures until later periods. We routinely monitor and adjust our capital expenditures in response to changes in oil and natural
gas prices, drilling and acquisition costs, industry conditions, availability of funds under our reserve-based credit facility, and internally generated cash flow. Matters outside our control that could affect the timing of our capital expenditures
include obtaining required permits and approvals in a timely manner and the availability of rigs and crews. Based upon current oil and natural gas price expectations and expected production levels, we anticipate that our cash flow from operations
and available borrowing capacity under our reserve-based credit facility will meet any planned capital expenditures and other cash requirements for the next twelve months. In 2011, we expect that our excess operating cash flows will be used to
reduce our outstanding debt level. However, future cash flows are subject to a number of variables, including the level of oil and natural gas production and prices. There can be no assurance that operations and other capital resources will provide
cash in sufficient amounts to maintain planned levels of capital expenditures. Our capital expenditures are also impacted by drilling and service costs. In the event of inflation increasing drilling and service costs, our hedging program will limit
our ability to have increased revenues recoup the higher costs, which could further impact our planned capital spending.

Financing
Activities

Our net cash used by financing activities was $7.9 million for the three months ended March 31, 2011,
compared to $10.4 million used in financing activities for the same period in 2010. During 2011, we used $7.5 million in operating cash flows to reduce our outstanding debt level. During the first quarter of 2011, we reduced our outstanding debt
from $165.0 million to $157.5 million, or by 4.5%. We also used $0.3 million to fund the cost of units tendered by employees for tax withholdings for unit-based compensation. At March 31, 2011, we had approximately $3.2 million in debt issue
costs remaining to be amortized through November 2012.

We have suspended our $0.13 per unit quarterly distributions to
unitholders since the quarter ended June 30, 2009, to reduce our outstanding indebtedness. Given our current focus on debt reduction, we anticipate that our distribution will remain suspended through the fourth quarter of 2011. Assuming that
the quarterly distribution rate would have remained at $0.13 per unit for each quarter in 2011, this suspension of the quarterly distribution would provide approximately $12.6 million in cash flow during 2011 that could be used to reduce our
outstanding debt balance under our reserve-based credit facility. For each of the quarterly periods since March 31, 2008, we have also suspended $4.3 million out of the $6.7 million in remaining Class D interests that have yet to be paid. We
expect that these quarterly distributions on the Class D interests, and all future quarterly distributions on the Class D interests, will remain suspended until such time as distributions are



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permitted under our reserve-based credit facility and limited liability company agreement. For additional information, refer to Outlook.

Our net cash used in financing activities was $10.4 million for the three months ended March 31, 2010. During 2010, we used $10.0
million in operating cash flows to reduce our outstanding debt level. During the first quarter of 2010, we reduced our outstanding debt from $195.0 million to $185.0 million, or by 5.0%. We also used $0.3 million to fund the cost of units tendered
by employees for tax withholdings for unit-based compensation. At March 31, 2010, we had approximately $5.1 million in debt issue costs remaining to be amortized through November 2012.

Contractual Obligations

At March 31, 2011, we had the following
contractual obligations or commercial commitments:



|                              |                |                            |       |      |  |   |         |  |  |      |     |  |            |   |     |       |  |   |     |  |  |   |         | 
|----------------------------- | -------------- | -------------------------- | ----- | ---- |  | - | ------- |  |  | ---- | --- |  | ---------- | - | --- | ----- |  | - | --- |  |  | - | ------- | 
|                              |                | Payments Due By
Year(1)(2) |      
|                              | (in thousands) |                           
|                              | 2011           |                            |       | 2012 |  |   | 2013    |  |  | 2014 |     |  | Thereafter |   |     | Total | 
|Reserve-Based Credit Facility |                | $                          |      |      |  | $ | 157,500 |  |  | $    |    |  |            | $ |    |       |  | $ |    |  |  | $ | 157,500 | 
|Support Services Agreement    |                |                            | 906   |      |  |   |        |  |  |      |    |  |            |   |    |       |  |   |    |  |  |   | 906     | 
|Offices Leases                |                |                            | 416   |      |  |   | 424     |  |  |      | 408 |  |            |   | 422 |       |  |   | 752 |  |  |   | 2,422   | 
|                              |                |                            |       |      |  |   |         |  |  |      |     |  |            |   |     |       |  |   |     |  |  |   |         | 
|Total                         |                | $                          | 1,322 |      |  | $ | 157,924 |  |  | $    | 408 |  |            | $ | 422 |       |  | $ | 752 |  |  | $ | 160,828 | 
|                              |                |                            |       |      |  |   |         |  |  |      |     |  |            |   |     |       |  |   |     |  |  |   |         | 



|(1) | This table does not include any liability associated with derivatives.
|--- | ----------------------------------------------------------------------

|(2) | This table does not include interest as interest rates are variable. The average interest rate on our outstanding debt was approximately 4.9% at March 31, 2011.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

At March 31, 2011, our asset retirement obligation was approximately $13.2 million.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements with third parties, and we maintain no debt obligations that contain provisions requiring accelerated payment of the related obligations in the event of specified
levels of declines in credit ratings.

Credit Markets and Counterparty Risk

We actively monitor the credit exposure and risks associated with our counterparties. Additionally, we continue to monitor global credit
markets to limit our potential exposure to credit risk where possible. Our primary credit exposures result from the sale of oil and natural gas and our use of derivatives. Through May 6, 2011, we have not suffered any losses with our
counterparties as a result of nonperformance.

Certain key counterparty relationships are described below:

Macquarie Energy LLC

Macquarie Energy LLC (Macquarie), a subsidiary of Sydney, Australia-based Macquarie Group Limited, purchases a portion of our natural gas production in the Cherokee Basin. We have received a
guarantee from Macquarie Bank Limited for up to $8.0 million in purchases through December 31, 2011. As of May 6, 2011, we have no past due receivables from Macquarie.

Scissortail Energy, LLC

Scissortail Energy, LLC (Scissortail), a subsidiary of Copano Energy, L.L.C., purchases a portion of our natural gas production in Oklahoma and Kansas. As of May 6, 2011, we have no past
due receivables from Scissortail.

ONEOK Energy Services Company, L.P.

ONEOK Energy Services Company, L.P. (ONEOK), a subsidiary of ONEOK, Inc., purchases a portion of our natural gas production in
Oklahoma and Kansas. We have received a guarantee from ONEOK, Inc. for up to $3.0 million in purchases through November 23, 2011. As of May 6, 2011, we have no past due receivables from ONEOK.



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J.P. Morgan Ventures Energy Corporation

J.P. Morgan Ventures Energy Corporation purchases the majority of our natural gas production in Alabama. The payment for the purchases is
guaranteed by JP Morgan Chase & Company through June 30, 2014. As of May 6, 2011, we have no past due receivables from J.P. Morgan Ventures Energy Corporation.

Derivative Counterparties

As of May 6, 2011, all of our derivatives are with BNP Paribas, The Royal Bank of Scotland plc, Societe Generale, The Bank of Nova Scotia, and Wells Fargo Bank, N.A. These banks are lenders who
participate in our reserve-based credit facility. All of our derivatives are collateralized by the assets securing our reserve-based credit facility and therefore currently do not require the posting of cash collateral. As of May 6, 2011, each
of these financial institutions has an investment grade credit rating.

Reserve-Based Credit Facility

As of May 6, 2011, the banks and their percentage commitments in our reserve-based credit facility are: The Royal Bank of Scotland
plc (26.84%), BNP Paribas (21.95%), The Bank of Nova Scotia (21.95%), Wells Fargo Bank, N.A. (14.63%), and Societe Generale (14.63%). As of May 6, 2011, each of these financial institutions has an investment grade credit rating.

Outlook

During 2011, we
expect that our business will continue to be affected by the factors described in Part II, Item 1A. Risk Factors, as well as the following key industry and economic trends. Our expectation is based upon key assumptions and
information currently available to us. To the extent that our underlying assumptions about or interpretations of available information prove to be incorrect, our actual results may vary materially from our expected results.

Full Year 2011 Expected Results

Our 2011 business plan and forecast is focused on further reducing our outstanding debt level and promoting financial flexibility by limiting capital expenditures and an anticipated continued suspension
of our quarterly distribution through the fourth quarter of 2011. We currently expect our operating environment to be characterized by continued low natural gas prices and increasing cost pressures, including higher service costs and healthcare
costs.

For 2011, we currently anticipate:



| |  |  | Our production to be between 13.4 Bcfe and 14.2 Bcfe, approximately 74% of which is currently hedged at prices that are attractive relative to the
price levels we currently observe in the commodity markets.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Our operating expenses to be actively managed, resulting in a range of $48.0 million to $52.0 million.
| | - |  | ------------------------------------------------------------------------------------------------------



| |  |  | Our total capital expenditures to be at the high end of $10.0 million to $12.0 million, which assumes a decline rate of 15 percent and a dollar per
flowing Mcfe range of $3,200 to $3,800. This capital budget has been held steady with our 2010 budgeted capital expenditures, which was reduced to a level below our estimated maintenance level of capital expenditures of $25.3 million for 2010 and
$23.0 million for 2011. We expect to drill and complete approximately 30 to 35 net wells and recompletions, both in the Black Warrior Basin and in the Cherokee Basin. We have very limited amounts of lease expirations during 2011 and 2012, which
generally allows us to reduce our drilling activities without losing our undeveloped locations. We expect to actively review our drilling and recompletion opportunities and anticipate allocating capital to the highest value-added projects across all
of our available opportunities. Continued success in the drilling of our oil prospects may lead us to seek authorization from our board of managers to increase our capital budget to further exploit oil potential in our asset base.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Our operating cash flows to allow for an additional $17.5 million to $22.5 million reduction of our outstanding debt level at December 31, 2011,
below our $157.5 million balance at March 31, 2011.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Our quarterly distributions to our unitholders to remain suspended through the fourth quarter of 2011. All future quarterly distributions must be
approved by our board of managers.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Impact of 2011 Plan

Our 2011 operating plan is intended to further reduce our outstanding debt by continuing our reduction of capital expenditures and
continuing the suspension of our quarterly distribution to unitholders. We expect that these plans will result in lower production levels in 2011. Our limited capital spending will likely result in lower production levels continuing into future
periods. We do not believe, however, that during a period of limited capital expenditures, we would lose any



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significant leased acreage. These plans are expected to reduce our leverage, continue to improve our liquidity position, and reduce future cash interest expenses on our outstanding unhedged debt.
When we forecast over the next five years, we currently expect that our existing asset base and hedge portfolio will allow us fund a limited capital program while substantially reducing our outstanding debt.

Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles
generally accepted in the United States of America. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of
contingent assets and liabilities. Certain accounting policies involve judgments and uncertainties to such an extent that there is reasonable likelihood that materially different amounts could have been reported under different conditions, or if
different assumptions had been used. We evaluate our estimates and assumptions on a regular basis. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances, the results
of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates and assumptions used in the preparation of our
financial statements. Below, we have provided an expanded discussion of our more critical accounting policies, estimates and judgments. We believe these accounting policies reflect our more significant estimates and assumptions used in the
preparation of the consolidated financial statements.

As of March 31, 2011, there were no changes with regard to the
critical accounting policies disclosed in our Annual Report on Form 10-K for the year ended December 31, 2010, which was filed on February 25, 2011. The policies disclosed included the accounting for oil natural gas properties, oil and
natural gas reserve quantities, net profits interest, revenue recognition and hedging activities. Please read Note 1 to the consolidated financial statements for a discussion of additional accounting policies and estimates made by management.

New Accounting Pronouncements

In January 2010, the FASB issued its final guidance on additional supplemental fair value disclosures. Two new disclosures will be required: (1) a gross presentation of activities
(purchases, sales, and settlements) within the Level 3 roll forward reconciliation, which will replace the net presentation format, and (2) detailed disclosures about the transfers between Level 1 and 2 measurements. The guidance
also provides several clarifications regarding the level of disaggregation and disclosures about inputs and valuation techniques. The new disclosures are effective for calendar year-end companies, except for the Level 3 gross activity
disclosures, which were effective the first quarter of 2011. The adoption of this guidance did not have a material impact on our financial statements or our disclosures.

In February 2010, the FASB amended its guidance on subsequent events. SEC filers are now not required to disclose the date through which an entity has evaluated subsequent events. The amended guidance was
effective upon issuance. The adoption of this guidance did not have a material impact on our financial statements or our disclosures.

New
Accounting Pronouncements Issued But Not Yet Adopted

As of March 31, 2011, there were a number of accounting
standards and interpretations that had been issued, but not yet adopted by us. We are currently reviewing the recently issued standards and interpretations but none are expected to have a material impact on our financial statements.



|Item 3. | Quantitative and Qualitative Disclosures about Market Risk
|------- | ----------------------------------------------------------

The primary objective of the following information is to provide forward-looking quantitative and qualitative information about our potential exposure to market risks. The term market risk
refers to the risk of loss arising from adverse changes in oil and natural gas prices and interest rates. The disclosures are not meant to be precise indicators of expected future losses, but rather indicators of reasonably possible losses. This
forward-looking information provides indicators of how we view and manage our ongoing market risk exposures. All of our market risk sensitive instruments were entered into for purposes other than speculative trading.

Global Financial and Energy Markets

The U.S. economy has continued to improve but the level of improvement has been insufficient to materially increase the demand for natural gas, which accounts for a majority of our production.
Concurrently, production from shale gas plays has increased the supply of natural gas in the U.S. and inventories of natural gas in storage remain at record high levels. As a result, future expected prices for natural gas remain depressed relative
to the price levels observed at the time our assets were



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acquired. At the same time, oil prices have dramatically increased in part due to the impact of a lower U.S. dollar and unrest in the Middle East.

We expect that our ability to issue debt and equity securities may continue to be limited over the next year. We also anticipate that the
borrowing base of our reserve-based credit facility could be further reduced, particularly if future expected market prices for natural gas prices remain depressed or decline further, thereby reducing our borrowing base. In response to the credit
crisis and the decline in the market prices for natural gas, we have suspended our cash distribution since June 2009 and lowered our maintenance capital spending in 2009 and 2010, and currently intend to do so again in 2011. This lower maintenance
capital spending will result in declining production which could lower our future operating cash flows. Because of the increase in oil prices, we expect to focus our limited capital spending on oil opportunities in our operating areas. If market
prices for natural gas remain depressed or oil prices decrease, our future cash flows from operations will be reduced for our unhedged production. We continue to monitor the financial and energy markets to determine if we should further revise the
timing and scope of our future drilling programs, financing activities, and acquisition activities to determine the impact of these activities on the reinstatement of our distributions to unitholders.

Commodity Price Risk

Our major market risk exposure is in the pricing applicable to our natural gas production and to some extent our oil production. Realized pricing is primarily driven by the Inside FERC prices for Southern
Natural Gas Company (Louisiana) with respect to our properties in the Black Warrior Basin and the Inside FERC prices for CenterPoint Energy Gas Transmission (East), Natural Gas Pipeline Company of America (Midcontinent), the CenterPoint Energy Gas
Transmission (East), ONEOK Gas Transportation (Oklahoma), Panhandle Eastern Pipeline (Texas, Oklahoma) and Southern Star Central Gas Pipeline (Texas, Oklahoma, Kansas) with respect to our properties in the Cherokee Basin, the Inside FERC price for
the CenterPoint Energy Gas Transmission (East) for our properties in the Woodford Shale, NYMEX West Texas Intermediate (Cushing, Oklahoma) for our oil production and the spot market prices applicable to all of our oil and natural gas production.
Historically, pricing for oil and natural gas has been volatile and unpredictable and we expect this volatility to continue in the future. We are currently operating in an environment characterized by low natural gas prices which tends to lower the
revenues that we realize on our unhedged natural gas production and limit the amount of operating cash flows available for maintenance capital expenditures, distributions to unitholders, or debt reduction. The prices we receive for oil and natural
gas production depend on many factors outside our control, including weather, economic conditions, and the total supply of oil and natural gas available for sale in the market.

We have entered into hedging arrangements with respect to a portion of our projected future production through various derivatives that
hedge the future prices received. These hedging activities are intended to support commodity sales prices at targeted levels and to manage our exposure to commodity price fluctuations. We do not hold or issue derivative instruments for speculative
trading purposes. The use of hedging transactions also involves the risk that one or more of the counterparties will be unable to meet the financial terms of the transactions executed. We attempt to minimize this risk by entering into our derivative
transactions with counterparties that are lenders in our reserve-based credit facility. The table below presents the hypothetical changes in fair values arising from potential changes in the quoted market prices of the commodity underlying the
derivative instruments used to mitigate these market risks. Any gain or loss on these derivative commodity instruments would be substantially offset by a corresponding gain or loss on the sale of the hedged natural gas production, which are not
included in the table. These derivatives do not hedge all of our commodity price risk related to our forecasted sales of oil and natural gas production, and as a result, we are subject to commodity price risks on our remaining unhedged oil and
natural gas production.



|                                                                                            |            |            |        |  |                     |   |        |                     |  |   |          |   |  |   |        |  |  |   |        | 
|------------------------------------------------------------------------------------------- | ---------- | ---------- | ------ |  | ------------------- | - | ------ | ------------------- |  | - | -------- | - |  | - | ------ |  |  | - | ------ | 
|                                                                                            |            | Fair Value |        |  | 10 Percent Increase |   |        | 10 Percent Decrease | 
|                                                                                            |            | Fair Value |        |  | (Decrease)          |   |        | Fair Value          |  |   | Increase |  
|                                                                                            | (in 000s) |           
|Impact of changes in commodity prices on derivative commodity instruments at March 31, 2011 |            | $          | 76,124 |  |                     | $ | 61,105 |                     |  | $ | (15,019  | ) |  | $ | 91,143 |  |  | $ | 15,019 | 

Interest Rate Risk

At March 31, 2011, the one-month LIBOR rate was 0.243%, the three-month LIBOR rate was 0.303%, and our applicable
margin on LIBOR borrowings was 3.25%. At March 31, 2011, the ABR rate was 3.25%, and our applicable margin on ABR borrowings was 2.25%. At March 31, 2011, we had debt outstanding of $157.5 million. This entire amount incurred interest at a
rate of a three-month LIBOR rates plus an applicable margin of 3.25% based on utilization. We had no debt outstanding at the one-month LIBOR or ABR rates. At March 31, 2011, the carrying value and fair value of our debt is $157.5 million.



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The table below presents the hypothetical changes in fair values arising from potential
changes in the quoted interest rate underlying the derivative instruments used to mitigate these market risks.



|                                                                                     |  |            |            |   |                     |          |        |                     |            |   |     |            |  |   |        |   |  |   |      |  
|------------------------------------------------------------------------------------ |  | ---------- | ---------- | - | ------------------- | -------- | ------ | ------------------- | ---------- | - | --- | ---------- |  | - | ------ | - |  | - | ---- | -
|                                                                                     |  | Fair Value |            |   | 10 Percent Increase |          |        | 10 Percent Decrease |           
|                                                                                     |  |            | Fair Value |   |                     | Increase |        |                     | Fair Value |   |     | (Decrease) | 
|                                                                                     |  | (in 000s) |           
|Impact of changes in LIBOR on derivative interest rate instruments at March 31, 2011 |  | $          | (2,903     | ) |                     | $        | (2,177 | )                   |            | $ | 726 |            |  | $ | (3,629 | ) |  | $ | (726 | )

We enter into hedging
arrangements to reduce the impact of volatility of changes in the LIBOR interest rate on our interest payments for our debt. At March 31, 2011, we have the following outstanding interest rate swaps that fix our LIBOR rate:



|                   |  |                   |        |  |                  |  |      |  
|------------------ |  | ----------------- | ------ |  | ---------------- |  | ---- | -
|Maturity Date      |  | Total Debt Hedged |        |  | LIBOR Fixed Rate | 
|                   |  | (in 000s)        |        |  |                  | 
|                   |  |                  
|August 20, 2014    |  | $                 | 11,000 |  |                  |  | 2.37 | %
|September 20, 2014 |  | $                 | 45,000 |  |                  |  | 2.52 | %
|October 19, 2014   |  | $                 | 29,500 |  |                  |  | 2.68 | %
|October 22, 2014   |  | $                 | 7,500  |  |                  |  | 2.61 | %



|Item 4. | Controls and Procedures
|------- | -----------------------

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. 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, with CEP have been detected. These inherent
limitations include error by personnel in executing controls due to faulty judgment or simple mistakes, which could occur in situations such as when personnel performing controls are new to a job function or when inadequate resources are applied to
a process. Additionally, controls can be circumvented by the individual acts of some persons or by collusion of two or more people.

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 absolute assurance that any design will succeed in achieving
its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions or personnel, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent
limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

Evaluation of
Disclosure Controls and Procedures

The Chief Executive Officer and the Chief Financial Officer of CEP have evaluated
the effectiveness of the disclosure controls and procedures (as such term is defined in rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act)) as of the end of the fiscal quarter covered
by this quarterly report (the Evaluation Date). Based on such evaluation, the Chief Executive Officer and the Chief Financial Officer have concluded that, as of the Evaluation Date, CEPs disclosure controls and procedures are
effective.

Changes in Internal Control over Financial Reporting

During the three months ended March 31, 2011, there were no changes in CEPs internal control over financial reporting (as such
term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that have materially affected, or are reasonably likely to materially affect, CEPs internal control over financial reporting.

Part IIOther Information



|Item 1. | Legal Proceedings
|------- | -----------------

Termination of the Trust and Related Litigation

As previously disclosed, on January 8, 2009, we were served by Trust Venture, on behalf of the Trust, with a purported derivative action filed in the Circuit Court of Tuscaloosa County, Alabama (the
Court). The lawsuit relates to the non-operating net profits interest (NPI) held by the Trust on certain wells owned by Robinsons Bend Production II, LLC (RBP II), a subsidiary of the Company, in the
Robinsons Bend Field in Alabama, and alleges, among other things, a breach of contract under the conveyance associated with the NPI (the Conveyance) and the agreement establishing the Trust and asserting that above market rates for
services were paid, reducing the amounts paid to the Trust in connection with the NPI. The lawsuit seeks unspecified damages and an accounting of the NPI. The Court made the Trust a nominal party to the lawsuit. At a preliminary hearing on
February 17, 2011, the Court approved a form of notice of a settlement among the



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parties to be sent by the Trust to its unitholders. On April 13, 2011, the Court approved the settlement. The anticipated effective date of the settlement is June 13, 2011, absent
appeal of the Courts order. The settlement with Trust Venture, its successor and the Trust provides, among other things:



| |  |  | RBP II will make a payment of $1.2 million to reimburse Trust Venture and its successor for their legal fees and expenses incurred in prosecuting the
lawsuit;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | RBP II will make an irrevocable offer to purchase the NPI relating to the Robinsons Bend Field from the Trust for at least $1 million, when it is
separately offered for sale by the Trust at public auction within 180 days of the effective date of the settlement, with such bid amount to be deposited by RBP II in a third-party escrow account pending the public auction. RBP II, as well as any
other bidders at the auction, shall have a right to submit a higher topping bid;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The parties agree that the cumulative deficit balance in the NPI account is approximately $5.8 million as of September 30, 2010, and that no
further payments will be due to the Trust with respect to the NPI unless and until the cumulative deficit balance is reduced to zero;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Trust Venture and its successor agree, on behalf of the Trust, that all prior and current calculations, charges and deductions contained in such
cumulative deficit NPI balance are in compliance with the terms of the Conveyance and, to the extent applicable thereunder, do not exceed competitive contract charges prevailing in the area for any such operations and services;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The Water Gathering and Disposal Agreement between RBP II and another subsidiary of the Company will be amended to reduce the fee from $1.00 per barrel
to $0.53 per barrel beginning on the first day of the month following the effective date of the settlement and to extend the term for an additional ten years, and Trust Venture and its successor agree, on behalf of the Trust, that the fees under
such agreement do not exceed competitive contract charges prevailing in the area for the operations and services provided under such agreement during the extended term of such agreement;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A mutual release among the parties and a dismissal with prejudice of the lawsuit; and
| | - |  | -------------------------------------------------------------------------------------



| |  |  | An effective date of the settlement upon final approval by the Court.
| | - |  | ---------------------------------------------------------------------

Item 1A. Risk Factors

There have been no
material changes to the risk factors previously disclosed in Item 1A. to Part I of our Annual Report on Form 10-K for the year ended December 31, 2010 that was filed on February 25, 2011. An investment in our Class B common units
involves various risks. When considering an investment in us, careful consideration should be given to the risk factors described in our 2010 Form 10-K. These risks and uncertainties are not the only ones facing us and there may be additional
matters that are not known to us or that we currently consider immaterial. All of these risks and uncertainties could adversely affect our business, financial condition or future results and, thus, the value of an investment in us.

Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements as defined by the SEC that are subject to a number of risks and uncertainties, many of which are beyond our control,
which may include statements about:



| |  |  | the volatility of realized oil and natural gas prices;
| | - |  | ------------------------------------------------------



| |  |  | the conditions of the capital markets, inflation, interest rates, availability of credit facilities to support business requirements, liquidity, and
general economic and political conditions;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the discovery, estimation, development and replacement of oil and natural gas reserves;
| | - |  | ---------------------------------------------------------------------------------------



| |  |  | our business, financial, and operational strategy;
| | - |  | --------------------------------------------------



| |  |  | our drilling locations;
| | - |  | -----------------------



| |  |  | technology;
| | - |  | -----------



| |  |  | our cash flow, liquidity and financial position;
| | - |  | ------------------------------------------------



| |  |  | the ability to extend or refinance our reserve-based credit facility;
| | - |  | ---------------------------------------------------------------------



| |  |  | the level of our borrowing base under our reserve-based credit facility;
| | - |  | ------------------------------------------------------------------------



| |  |  | the resumption or amount of our cash distribution;
| | - |  | --------------------------------------------------



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| |  |  | the impact from any termination of the NPI sharing arrangement or any change in the calculation of the NPI or any appeal of the Courts order on
the settlement relating to the NPI;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our hedging program and our derivative positions;
| | - |  | -------------------------------------------------



| |  |  | our production volumes;
| | - |  | -----------------------



| |  |  | our lease operating expenses, general and administrative costs and finding and development costs;
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | the availability of drilling and production equipment, labor and other services;
| | - |  | --------------------------------------------------------------------------------



| |  |  | our future operating results;
| | - |  | -----------------------------



| |  |  | our prospect development and property acquisitions;
| | - |  | ---------------------------------------------------



| |  |  | the marketing of oil and natural gas;
| | - |  | -------------------------------------



| |  |  | competition in the oil and natural gas industry;
| | - |  | ------------------------------------------------



| |  |  | the impact of the current global credit and economic environment;
| | - |  | -----------------------------------------------------------------



| |  |  | the impact of weather and the occurrence of natural disasters such as fires, floods, hurricanes, tornados, earthquakes, snow and ice storms and other
catastrophic events and natural disasters;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | governmental regulation, including environmental regulation, and taxation of the oil and natural gas industry;
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | developments in oil-producing and natural gas producing countries;
| | - |  | ------------------------------------------------------------------



| |  |  | support from our former sponsor or a change in significant unitholders; and
| | - |  | ---------------------------------------------------------------------------



| |  |  | our strategic plans, objectives, expectations, forecasts, budgets, estimates and intentions for future operations.
| | - |  | ------------------------------------------------------------------------------------------------------------------

All of these types of statements, other than statements of historical fact included in this Quarterly Report on Form 10-Q, are
forward-looking statements. These forward-looking statements may be found in Item 1. Business; Item 1A. Risk Factors; Item 7. Managements Discussion and Analysis of Financial Condition and Results
of Operations and other items within this Quarterly Report on Form 10-Q. In some cases, forward-looking statements can be identified by terminology such as may, could, should, expect,
plan, project, intend, anticipate, believe, estimate, predict, potential, pursue, target, continue, the negative of
such terms or other comparable terminology.

The forward-looking statements contained in this Quarterly Report on Form 10-Q
are largely based on our expectations, which reflect estimates and assumptions made by our management. These estimates and assumptions reflect our best judgment based on currently known market conditions and other factors. Although we believe such
estimates and assumptions to be reasonable, they are inherently uncertain and involve a number of risks and uncertainties that are beyond our control. In addition, managements assumptions about future events may prove to be inaccurate.
Management cautions all readers that the forward-looking statements contained in this Quarterly Report on Form 10-Q are not guarantees of future performance, and we cannot assure any reader that such statements will be realized or the
forward-looking events and circumstances will occur. Actual results may differ materially from those anticipated or implied in the forward-looking statements due to factors listed in the Risk Factors section and elsewhere in this
Quarterly Report on Form 10-Q. We do not intend to publicly update or revise any forward-looking statements as a result of new information, future events or otherwise. These cautionary statements qualify all forward-looking statements attributable
to us or persons acting on our behalf.



|Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds
|------- | -----------------------------------------------------------

None.



|Item 3. | Defaults Upon Senior Securities
|------- | -------------------------------

None.



|Item 4. | Reserved
|------- | --------



|Item 5. | Other Information
|------- | -----------------

None.



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|Item 6. | Exhibits
|------- | --------



| | (a) | The following documents are filed as a part of this Quarterly Report on Form 10-Q:
| | --- | ----------------------------------------------------------------------------------



| | 1. | Financial Statements:
| | -- | ---------------------

Consolidated Statements of Operations and Comprehensive Income/(Loss)  Constellation Energy Partners LLC for the three months ended
March 31, 2011 and March 31, 2010

Consolidated Balance Sheets  Constellation Energy Partners LLC at
March 31, 2011 and December 31, 2010

Consolidated Statements of Cash Flows  Constellation Energy Partners LLC
for the three months ended March 31, 2011 and March 31, 2010

Consolidated Statements of Changes in Members
Equity and Comprehensive Income  Constellation Energy Partners LLC for the three months ended March 31, 2011

Notes
to Consolidated Financial Statements

EXHIBIT INDEX



|               |  |                                                                                                                                                                                                                               
|-------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit Number |  | Description                                                                                                                                                                                                                   
|               | 
|*31.1.        |  | Certification of Chief Executive Officer, Chief Operating Officer and President of Constellation Energy Partners LLC pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.                                               
|               | 
|*31.2.        |  | Certification of Chief Financial Officer and Treasurer of Constellation Energy Partners LLC pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                        
|               | 
|*32.1.        |  | Certification of Chief Executive Officer, Chief Operating Officer and President of Constellation Energy Partners LLC pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002.
|               | 
|*32.2.        |  | Certification of Chief Financial Officer and Treasurer of Constellation Energy Partners LLC 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, Constellation Energy Partners LLC, the Registrant, has duly caused
this report to be signed on its behalf by the undersigned, thereunto duly authorized.





|                  |  |                                   |  |                                                         
|----------------- |  | --------------------------------- |  | --------------------------------------------------------
|                  |  | CONSTELLATION ENERGY PARTNERS LLC
|                  |  | (REGISTRANT)                     
|                  |  |                                  
|Date: May 6, 2011 |  | By                                |  | /s/ MICHAEL B. HINEY                                    
|                  |  |                                   |  | Michael B. Hiney Chief
Accounting Officer and Controller



40