Joint Filing Agreement
Exhibit 99.4
In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as
amended, each of the undersigned does hereby consent and agree to the joint filing on behalf of
each of them of a Statement on Schedule 13D/A and all amendments thereto with respect to the units
representing limited partner interests in Xxxxxx Energy Partners L.P. beneficially owned by each of
them, and to the inclusion of this Joint Filing Agreement as an exhibit thereto.
| Dated: February 29, 2008 | /s/ Xxx X. Xxxxxx | |||
| Xxx X. Xxxxxx | ||||
| Dated: February 29, 2008 | XXX XXXXXX LLC |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President and Manager | ||||
| Dated: February 29, 2008 | DD SECURITIES LLC |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President and Manager | ||||
| Dated: February 29, 2008 | ENTERPRISE PRODUCTS OPERATING LLC By: Enterprise Products OLPGP, Inc., its sole manager |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President | ||||
| Dated: February 29, 2008 | ENTERPRISE PRODUCTS OLPGP, INC. |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President | ||||
| Dated: February 29, 2008 | ENTERPRISE PRODUCTS PARTNERS L.P. By: Enterprise Products GP, LLC, its general partner |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President | ||||
| Dated: February 29, 2008 | ENTERPRISE PRODUCTS GP, LLC |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President | ||||
| Dated: February 29, 2008 | EPE HOLDINGS, LLC, its General Partner |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President | ||||
| Dated: February 29, 2008 | ENTERPRISE GP HOLDINGS L.P. By: EPE HOLDINGS, LLC, its General Partner |
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| By: | /s/ W. Xxxxxxx Xxxxxx | |||
| W. Xxxxxxx Xxxxxx | ||||
| Executive Vice President | ||||
