SEMCO ENERGY, Inc. Declares Quarterly Dividend On Preferred Stock

PORT HURON, Mich., Oct. 24 /PRNewswire-FirstCall/ -- SEMCO ENERGY, Inc. (NYSE: SEN) today announced that the Company's Board of Directors has declared a regular quarterly dividend payable on the Company's 5% Series B Convertible Cumulative Preferred Stock. The dividend is payable on November 15, 2005, at a rate of $2.50 per share, to holders of the preferred stock of record on November 1, 2005.

SEMCO ENERGY, Inc. distributes natural gas to more than 404,000 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.
10/24/2005

CONTACT: Analysts Contact: Thomas Connelly, Director of Investor Relations, 1-248-458-6163, or Media Contact: Timothy Lubbers, Director of Marketing & Corporate Communications, +1-810-887-4208, both of SEMCO ENERGY, Inc.

9136 10/24/2005 16:40 EDT http://www.prnewswire.com

"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.