---

Exhibit 99.1

CERTIFICATION PURSUANT TO RULE 13a-14 OR 15d-14 OF THE
SECURITIES EXCHANGE ACT OF 1934

I, Thomas W. Buchanan, certify that:

1. I have reviewed this annual report on Form 40-F of Provident Energy Trust;
2. Based on my knowledge, this report does not contain any
  untrue statement of a material fact or omit to state a material fact necessary
  to make the statements made, in light of the circumstances under which such
  statements were made, not misleading with respect to the period covered by
  this report;
3. Based on my knowledge, the financial statements, and other
  financial information included in this report, fairly present in all material
  respects the financial condition, results of operations and cash flows of the
  issuer as of, and for, the periods presented in this report;
4. The issuer's other certifying officer and I are responsible
  for establishing and maintaining disclosure controls and procedures (as
  defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the issuer and
  have:

> (a) Designed such
>     disclosure controls and procedures, or caused such disclosure controls and
>     procedures to be designed under our supervision, to ensure that material
>     information relating to the issuer, including its consolidated subsidiaries,
>     is made known to us by others within those entities, particularly during the
>     period in which this report is being prepared;
>     (b) Evaluated the
>     effectiveness of the issuer's disclosure controls and procedures and
>     presented in this report our conclusions about the effectiveness of the
>     disclosure controls and procedures, as of the end of the period covered by
>     this report based on such evaluation; and
>     (c) Disclosed in
>     this report any change in the issuer's internal control over financial
>     reporting that occurred during the period covered by the annual report that
>     has materially affected, or is reasonably likely to materially affect, the
>     issuer's internal control over financial reporting; and

1. The issuer's other certifying officer and I have disclosed,
  based on our most recent evaluation of internal control over financial
  reporting, to the issuer's auditors and the audit committee of the issuer's
  board of directors (or persons performing the equivalent function):

> (a) All significant deficiencies and material weaknesses
>     in the design or operation of internal control over financial reporting
>     which are reasonably likely to adversely affect the issuer's ability to
>     record, process, summarize and report financial information; and
>     (b) Any fraud, whether or not material, that involves
>     management or other employees who have a significant role in the issuer's
>     internal control over financial reporting. Dated: March 28, 2005

|Dated: March 28, 2005 |                                                     
|--------------------- | ----------------------------------------------------
|                      | /s/ Thomas W.
    Buchanan                          
|                      | Thomas W. Buchanan                                  
|                      | Chief Executive
    Officer of Provident Energy Ltd.

---