**Exhibit 31.1**

**CERTIFICATION**

I, Stephen A. Snider,certify that:

1.             Ihave reviewed this quarterly report* onForm 10-Q of Universal Compression Partners, L.P. (the “registrant”);

2.             Basedon my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this report;

3.             Basedon my knowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this report;

4.             The registrant’s other certifyingofficer and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the registrant and have:

a)                                      designedsuch disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared;

b)                                     [RESERVED]

c)                                      evaluatedthe effectiveness of the registrant’s disclosure controls and procedures andpresented in this report our conclusions about the effectiveness of the disclosurecontrols and procedures as of the end of the period covered by this reportbased on such evaluation; and

d)                                     disclosedin this report any change in the registrant’s internal control over financialreporting that occurred during the registrant’s most recent fiscal quarter thathas materially affected, or is reasonably likely to materially affect, theregistrant’s internal control over financial reporting; and

5.             The registrant’s other certifyingofficer and I have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrant’s auditors and the auditcommittee of registrant’s board of directors (or persons performing theequivalent functions):

a)                                      allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the registrant’s ability to record, process, summarize andreport financial information; and

b)                                     anyfraud, whether or not material, that involves management or other employees whohave a significant role in the registrant’s internal control over financialreporting.
| Date:  | May 9, 2007 | /s/ STEPHEN A. SNIDER |
|--------|-------------|-----------------------|
|   |        | Name:                 | Stephen A. Snider |
|   |        | Title:                | Chief Executive Officer, UCO GP, LLC |
|   |        |                  | As General  Partner of UCO General Partner, LP |
|   |        |                  | As General  Partner of Universal Compression Partners, L.P. |

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*                    Thisreport presents the financial condition, results of operations and cash flowsof the registrant and the results of operations and cash flow of the registrant’spredecessor, the natural gas contract compression business that is provided inthe United States of America by Universal Compression Holdings, Inc. and itssubsidiaries.

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