Webcast Alert: SEMCO ENERGY, Inc. Announces First Quarter 2005 Earnings Teleconference

FARMINGTON HILLS, Mich., April 22, 2005 /PRNewswire-FirstCall via COMTEX/ -- SEMCO ENERGY, Inc. (NYSE: SEN) announces the following Webcast:

What:     SEMCO ENERGY, Inc. First Quarter 2005 Earnings Teleconference

    When:     04/29/2004 @ 10:00 a.m. Eastern

    Where:    http://www.semcoenergy.com

    How:      Live over the Internet -- Simply log on to the web at the
              address above.

Contact: Thomas Connelly, Director, Investor Relations of SEMCO ENERGY, Inc., 248-458-6163, Thomas.Connelly@semcoenergy.com

If you are unable to participate during the live webcast, the call will be archived at http://www.semcoenergy.com . To access the Web site replay, go to Investor Info and click on Conference Calls.

SEMCO ENERGY, Inc. distributes natural gas to approximately 392,000 customers combined in Michigan, as SEMCO ENERGY GAS COMPANY, and in Alaska, as ENSTAR Natural Gas Company. It owns and operates businesses involved in propane distribution, intrastate pipelines and natural gas storage in various regions of the United States. In addition, it provides information technology and outsourcing services, specializing in the mid-range computer market.


Thomas Connelly, Director, Investor Relations of SEMCO ENERGY, Inc., +1-248-458-6163
"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.