**EXHIBIT
      31.1**


**CERTIFICATION**





I,
      A.
      Bruce Neil, President & Chief Executive Officer, certify that:





1. I
      have reviewed this annual report on Form 10-K/A of The Doe Run Resources
      Corporation;





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 periods covered by this report;





3. Based
      on my knowledge, the financial statements, and other financial information
      included in this annual report, fairly present in all material respects the
      financial condition, results of operations and cash flows of the registrant
      as
      of, and for, the periods presented in this report;





4. The
      registrant’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 registrant 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 registrant, 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;
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|(b) | Evaluated
              the effectiveness of the registrant’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;
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------




|(c) | Disclosed
              in this report any change in the registrant’s internal control over
              financial reporting that occurred during the registrant’s most recent
              fiscal quarter that has materially affected, or is reasonably likely
              to
              materially affect, the registrant’s internal control over financial
              reporting; and
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------




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





|(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 registrant’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 registrant’s internal control
              over financial reporting.
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Date:
      October 19, 2006











By: /s/
      A.
      Bruce Neil


A.
      Bruce
      Neil


President
      & Chief Executive Officer