Exhibit 99.1 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON FINANCIAL STATEMENT SCHEDULE To the Shareholders and Board of Directors of Michael Baker Corporation: Our audits of the consolidated financial statements, of management's assessment of the effectiveness of internal control over financial reporting and of the effectiveness of internal control over financial reporting referred to in our report dated March 15, 2005 appearing in the 2004 Annual Report to Shareholders of Michael Baker Corporation (which report, consolidated financial statements and assessment are incorporated by reference in this Annual Report on Form 10-K) also included an audit of the financial statement schedule listed in Item 15(a)(2) of this Form 10-K. In our opinion, this financial statement schedule presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. /s/ PricewaterhouseCoopers LLP - ------------------------------ Pittsburgh, Pennsylvania March 15, 2005 -47-