**Exhibit 31**
**CERTIFICATION**
I, Lee Ann Anderson,certify that:
     1. I have reviewed thisAnnual Report on Form 10-K of San Juan Basin Royalty Trust, forwhichTexasBank acts as Trustee;
     2. Based on my knowledge,this report does not contain any untrue statement of a materialfactor omit to state a material fact necessary to make the statementsmade, in light of thecircumstances under which such statements were made, notmisleading with respect to the periodcovered by this report;
     3. Based on my knowledge,the financial statements, and other financial information includedin this report, fairly present in all material respects thefinancial condition, distributableincome and changes in trust corpus of the registrant as of, andfor, the periods presented in thisreport;
     4. I am responsible forestablishing and maintaining disclosure controls and procedures(asdefined in Exchange Act Rules 13a-15(e) and 15d-15(e)) andinternal control over financialreporting (as defined in Exchange Act Rules 13a-15(f) and15d-15(f)) for the registrant and I have:
 a)  Designed such disclosure controls and procedures, orcaused such disclosurecontrols and procedures to be designed under my supervision, toensure that materialinformation relating to the registrant, including its consolidatedsubsidiaries, ismade known to me by others within those entities, particularlyduring the period inwhich this report is being prepared;  b)  Designed such internal control over financial reporting,or caused suchinternal control over financial reporting to be designed under mysupervision, toprovide reasonable assurance regarding the reliability offinancial reporting and thepreparation of financial statements for external purposes;  c)  Evaluated the effectiveness of the registrant’sdisclosure controls andprocedures and presented in this report my conclusions about theeffectiveness of thedisclosure controls and procedures, as of the end of the periodcovered by this reportbased on such evaluation; and  d)  Disclosed in this report any change in theregistrant’s internal control overfinancial reporting that occurred during the registrant’smost recent fiscal quarter(the registrant’s fourth fiscal quarter in the case of anannual report) that hasmaterially affected, or is reasonably likely to materially affect,the registrant’sinternal control over financial reporting; and
     5. I have disclosed,based on my most recent evaluation of internal control overfinancialreporting, to the registrant’s auditors:
 a)  All significant deficiencies and material weaknesses inthe design or operationof internal control over financial reporting which are reasonablylikely to adverselyaffect the registrant’s ability to record, process, summarizeand report financialinformation; and
 

 

 b)  Any fraud, whether or not material, that involves personswho have asignificant role in the registrant’s internal control overfinancial reporting.
In giving thecertifications in paragraphs 4 and 5 above, I have relied to theextent I considerreasonable on information provided to me by Burlington ResourcesOil & Gas Company LP.   Date: March 16, 2005 By:/s/ Lee Ann AndersonLee Ann AndersonVice President and Trust Officer, TexasBank