SEMCO ENERGY Management to Address American Gas Association Financial Forum

PORT HURON, Mich., April 26 /PRNewswire-FirstCall/ -- SEMCO ENERGY, Inc. (NYSE: SEN) today announced that members of the Company's senior management team will address the American Gas Association (AGA) Financial Forum in New Orleans on May 2, 2005.

George A. Schreiber, Jr., Company President and Chief Executive Officer; Michael V. Palmeri, Senior Vice President, Treasurer and Chief Financial Officer; and Eugene N. Dubay, Senior Vice President of Operations, will address the forum beginning at 12:10 p.m. Eastern Daylight Time.

A live webcast of the Company's presentation at the AGA Financial Forum will be available on the Company's website at http://www.semcoenergy.com .

SEMCO ENERGY, Inc. distributes natural gas to more than 400,000 customers combined in Michigan, as SEMCO ENERGY GAS COMPANY, and in Alaska, as ENSTAR Natural Gas Company. It also owns and operates businesses involved in propane distribution, intrastate pipelines and natural gas storage in various regions of the United States.

The following is a "Safe-Harbor" statement under the Private Securities Litigation Reform Act of 1995. This release contains forward-looking statements that involve risks and uncertainties. Statements that are not historic facts, including statements about the Company's outlook, beliefs, plans, goals and expectations, are forward-looking statements. Factors that may impact forward-looking statements include, but are not limited to, the effects of weather, the economic climate, competition, commodity prices, changing conditions in the capital markets, regulatory approval processes, success in obtaining new business, success in defending claims against the Company, and other risks detailed from time to time in the Company's Securities and Exchange Commission filings.

SOURCE  SEMCO ENERGY, Inc.
    -0-                             04/26/2005
    /CONTACT:  Analysts Contact: Thomas Connelly, Director of Treasury and
Investor Relations, Phone: +1-248-458-6163, or Media Contact: Timothy Lubbers,
Director of Marketing & Corporate Communications, Phone: +1-810-887-4208, both
of SEMCO ENERGY, Inc./
    /Web site:  http://www.semcoenergy.com /
    (SEN)

CO:  SEMCO ENERGY, Inc.; American Gas Association Financial Forum
ST:  Michigan, Louisiana
IN:  OIL UTI
SU:  CCA MAV

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"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding SEMCO Energy's business which are not historical facts are "forward-looking statements" that involve risks and uncertainties. For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the Company's Annual Report or Form 10-K for the most recently ended fiscal year.