| **Exhibit                10.1**  |
|---------------------------------------|

**SIXTH      AMENDMENT TO CREDIT AGREEMENT**

**Among**

**VANGUARD      NATURAL GAS, LLC**

**(f/k/a      NAMI HOLDING COMPANY, LLC),**

**as      Borrower,**

**CITIBANK,      N.A.,**

**as      Administrative Agent and L/C Issuer, **

**and**

**CITIBANK,      N.A.,**

**as      Co-Lead Arranger, Sole Bookrunner**

**and      Co-Syndication Agent,**

**and**

**BNP      PARIBAS,**

**as      Co-Lead Arranger and Co-Syndication Agent**

**and**

**THE      LENDERS PARTY HERETO**

**Dated      as of November 15, 2007**

|   |
|--------|

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**SIXTH      AMENDMENT**
**      TO CREDIT AGREEMENT**

***“Sixth      Amendment”***
***“Amendment”***
**VANGUARD      NATURAL GAS, LLC**
***“Borrower”***
***“Lenders”***
**CITIBANK,      N.A., **

**RECITALS**

***Credit      Agreement***

**Same      Terms**
**.      **
* *

***Effective      Date”***

***“Modification      Papers”***

**Conditions      Precedent**

**Sixth      Amendment to Credit Agreement**
**.**

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**Fees      and Expenses**
**.      **

** Representations      and Warranties**

|  | 3. | **Amendments                to Credit Agreement****.**                On                the Effective Date, the Credit Agreement shall be deemed to be amended                as                follows: |
|--|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (a) | The                Borrowing Base Utilization Grid contained in the definition of "Applicable                Margin" in Section                1.01                shall be amended to read in its entirety as                follows: |
|--|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| *Borrowing                Base Utilization Grid*     |
|------------------------------------------------------|
| Borrowing                Base Utilization Percentage | *<**25%* | *>25% **<**50%* | *>50% **<**75%* | *>75%* |
| Eurodollar                Loans                      | 1.00% | 1.25% | 1.50% | 1.75% |
| ABR                Loans                             |                  .00% |   .25% |                  .50% |                  .75% |
| Commitment                Fee Rate                   |                  .25% |                  .30% |                    .375% |     .375% |
| Letter                of Credit Fee                  | 1.00% | 1.25% | 1.50% | 1.75% |

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|   | 4. | **Borrowing                Base****.**                As                of the Effective Date, the Borrowing Base shall be $110,500,000,                and the                Monthly Reduction Amount shall be                $0. |
|--------|----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | 5. | **Certain                Representations****.**                The Borrower represents and warrants that, as of the Effective Date:                (a) the Borrower has full power and authority to execute the                Modification Papers and the Modification Papers constitute the legal,                valid and binding obligation of the Borrower enforceable in accordance                with their terms, except as enforceability may be limited by general                principles of equity and applicable bankruptcy, insolvency,                reorganization, moratorium, and other similar laws affecting the                enforcement of creditors' rights generally; and (b) no authorization,                approval, consent or other action by, notice to, or filing with,                any                governmental authority or other person is required for the execution,                delivery and performance by the Borrower thereof. In addition, the                Borrower represents that all representations and warranties contained                in                the Credit Agreement are true and correct in all material respects                on and                as of the Effective Date (except representations and warranties that                relate to a specific prior date are based upon the state of facts                as they                exist as of such date). |
|--------|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | 6. | **No                Further Amendments****.**                Except as previously amended in writing or as amended hereby, the                Credit                Agreement shall remain unchanged and all provisions shall remain                fully                effective between the parties. |
|--------|----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | 7. | **Limitation                on Agreements****.**The                modifications set forth herein are limited precisely as written and                shall                not be deemed (a) to be a consent under or a waiver of or an                amendment to any other term or condition in the Credit Agreement                or any of                the Loan Documents, or (b) to prejudice any right or rights which the                Administrative Agent or any Lender now has or may have in the future                under                or in connection with the Credit Agreement and the Loan Documents,                each as                amended hereby, or any of the other documents referred to                herein** **or                therein. The Modification Papers shall constitute Loan Documents                for all                purposes. |
|--------|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | 8. | **Counterparts****.**This                Amendment may be executed in any number of counterparts, each of                which                when executed and delivered shall be deemed an original, but all                of which                constitute one instrument. In making proof of this Amendment, it                shall not                be necessary to produce or account for more than one counterpart                thereof                signed by each of the parties                hereto. |
|--------|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | 9. | **Incorporation                of Certain Provisions by Reference****.**The                provisions of Section 12.09 of the Credit Agreement captioned “Governing                Law; Jurisdiction; Consent to Service of Process; Waiver of Jury                Trial”                are incorporated herein by reference for all                purposes. |
|--------|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | 10. | **Entirety,                Etc****.**This                instrument and all of the other Loan Documents embody the entire                agreement                between the parties. THIS AMENDMENT AND ALL OF THE OTHER LOAN DOCUMENTS                REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE                CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT                ORAL                AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS                BETWEEN                THE PARTIES. |
|--|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

***[This      space if left intentionally blank. The signature pages      follow.]***

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| **BORROWER:** | **VANGUARD                NATURAL GAS, LLC**       |
|---------------|----------------------------------------------------|
|          | **f/k/a                Nami Holding Company, LLC** |
|          |                                               |
|          |                                               |
|          | By:                                                | /s/                Richard Robert |
|          |                                               | Richard                Robert |
|          |                                               | Executive                Vice President |
|          |                                               | and                Chief Financial Officer |

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| **ADMINISTRATIVE                AGENT:** | **CITIBANK,                N.A.** |
|------------------------------------------|-----------------------------------|
| as                Administrative Agent   |                              |   |
|                                     |                              |   |
|                                     | By:                               | /s/                Angela McCracken |
|                                     |                              | Angela                McCracken |
|                                     |                              | Vice                President |
|                                     |                              |   |
|                                     |                              |   |
| **LENDERS:**                             | **CITIBANK,                N.A.** |
|                                     |                              |
|                                     |                              |
|                                     | By:                               | /s/                Angela McCracken |
|                                     |                              | Angela                McCracken |
|                                     |                              | Vice                President |

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| **LENDERS:** | **BNP                PARIBAS** |
|--------------|--------------------------------|
|         |                           |   |
|         |                           |   |
|         | By:                            | /s/                Betsy Jocher |

|   | Name:  | Betsy                Jocher |
|--------|--------|-----------------------------|
|   | Title: | Director                    |

|   | By: | /s/                Polly Schott |
|--------|-----|---------------------------------|

|   | Name:  | Polly                Schott   |
|--------|--------|-------------------------------|
|   | Title: | Vice                President |

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