EXHIBIT 99.1

                       [LOGO OF MICHAEL BAKER CORPORATION]

PITTSBURGH, June 1 /PRNewswire-FirstCall/ -- Michael Baker Corporation (Amex:
BKR) (the "Company") announced today that it has revised its estimate of the
financial impact reported in its January 31, 2006, announcement that it will be
restating certain previously issued consolidated financial statements. The
Company has identified additional tax accounting and compliance errors which
will have an adverse effect on previously reported earnings. These additional
errors were identified as a result of steps taken by the Company's management to
address material control weaknesses and ensure that there were no additional tax
or other accounting issues that could impact prior years' consolidated financial
statements.

These additional tax accounting and compliance errors involve the underaccrual
and underpayment of international and state income, payroll and other indirect
taxes, and related penalties and interest, within the Company's Energy segment.
After giving effect to the additional corrections that will now be necessary,
the aggregate effect of all corrections (i.e., those previously reported in the
Form 8-K dated January 31, 2006, and the new items described herein), including
the related tax effects, is currently expected to result in net income
reductions in the range of $2.0 million to $4.0 million in each of the 2001,
2002, 2003 and 2004 fiscal years, and a total net income reduction in the range
of $10.0 million to $10.5 million for this four-year period; a net income
reduction in the range of $1.0 million to $1.5 million for the first quarter of
2005; and a cumulative reduction in the range of $14.0 million to $15.0 million
in the Company's retained earnings as of March 31, 2005.

Management currently believes that certain of the recently identified additional
tax exposures may ultimately either be recoverable from clients or may not be
determined to reflect liabilities of the Company. Based on information currently
available, these exposures have been determined to reflect probable liabilities
of the Company. However, depending on the outcome of future negotiations and
discussions with clients and tax authorities, subsequent conclusions may be
reached which indicate that portions of these additional tax exposures may not
ultimately require payment and therefore could be reversed in future periods.
This could result in favorable effects on the Company's income statements in
future periods.

Management has also identified certain vehicle and equipment leases that were
previously reported as operating leases but should have been treated as capital
leases. This correction is expected to result in the recording of an additional
fixed asset amount in the range of $1.0 million to $1.5 million and a related
liability for capital lease obligations in a nearly offsetting amount for the
periods included in the restatement. The impact to the Company's statements of
income and cash flows is not expected to be material for any year during the
restatement period.



Since the deadline for the Company's 2005 Form 10-K has now passed, the Company
intends to include all necessary effects of the restatement of these
consolidated financial statements in an amended Form 10-Q filing for the quarter
ended March 31, 2005; its Form 10-Q filings for the quarters ended June 30,
2005, and September 30, 2005; and its Form 10-K filing for the year ended
December 31, 2005. As a result, the Company will not include restated
consolidated financial information for fiscal year 2000 in the five-year summary
of Selected Financial Data in its 2005 Form 10-K. Accordingly, the income
statement effects of the restatement for fiscal year 2000 will be included in
the Company's opening retained earnings balance as of January 1, 2001.

The Company's Forms 10-Q for the quarters ended June 30, 2005, and September 30,
2005, its Form 10-K for the year ended December 31, 2005, and its Form 10-Q for
the quarter ended March 31, 2006, have not been timely filed. These will be
filed with the Securities and Exchange Commission as soon as practicable. As
previously disclosed, the Company's historical consolidated financial statements
for the five years ended December 31, 2004, and the quarter ended March 31,
2005, should not be relied upon.

Management currently believes that all issues which will require restatement of
the Company's consolidated financial statements for each of the five years in
the period ended December 31, 2004, and the first quarter of 2005, have been
identified. However, the estimated restatement amounts disclosed above remain
preliminary, unaudited, and subject to adjustment, possibly by amounts that
could be material individually or in the aggregate. In addition, it is possible
that the Company may identify additional new issues which could also impact its
previously issued consolidated financial statements and the scope of the
restatement described in this news release. In the event that new issues
requiring restatement arise, it is possible that such additional adjustments
could be material individually or in the aggregate.

Statements contained in this news release that disclose the Company's or
management's intentions, expectations or predictions of the future, including
expected restatement adjustments to previously issued consolidated financial
statements, are forward-looking statements. The actual amounts and effects of
the Company's restatement adjustments could differ materially from those
projected in such forward-looking statements.

Michael Baker Corporation (http://www.mbakercorp.com) provides engineering and
operations and maintenance services for its clients' most complex challenges
worldwide. The firm's primary practice areas are aviation, environmental,
facilities, geospatial information technologies, pipelines and
telecommunications, transportation, water/wastewater, and oil & gas. With more
than 5,000 employees in over 40 offices across the United States and
internationally, Baker is focused on providing services that span the complete
life cycle of infrastructure and managed asset projects.

SOURCE  Michael Baker Corporation
    -0-                             06/01/2006
    /CONTACT:  David Higie of Michael Baker Corporation, +1-412-269-6449/
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    /Web site:  http://www.mbakercorp.com/
    (BKR)