Corporate Information
Corporate Info

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PSA: SEMCO ENERGY GAS COMPANY Experiencing Intermittent Phone Outage; Alternate Emergency Contact in Place
PORT HURON, Mich., July 3, 2007 /PRNewswire via COMTEX News Network/ -- SEMCO ENERGY GAS COMPANY is currently experiencing intermittent telephone system outages. Customers who need to report a gas leak or emergency should call their local emergency services dispatch number until further notice. The message will be forwarded to SEMCO ENERGY. This system is for EMERGENCIES ONLY. Thank you for your patience and cooperation.

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.

In connection with the proposed transaction with Cap Rock Holding Corporation, a definitive proxy statement of SEMCO ENERGY and other materials have been filed with the Securities and Exchange Commission (SEC). SEMCO ENERGY recommends investors read the definitive proxy statement and other materials, as well as any amendments or supplements to those documents, carefully as they contain important information about SEMCO ENERGY and the proposed transaction. The definitive proxy statement has been mailed to SEMCO ENERGY's holders of record at the close of business on April 26, 2007. Investors will be able to receive free copies of the proxy statement, when available, as well as other filed documents containing information about SEMCO ENERGY at and from SEMCO ENERGY's website at

SEMCO ENERGY and its directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies from the shareholders of SEMCO ENERGY in connection with the transaction. Information about the directors and executive officers of SEMCO ENERGY and their ownership of SEMCO ENERGY Common Stock is set forth in the Company's Form 10-K/A, dated April 30, 2007, as filed with the SEC. Additional information regarding the interests of participants in the solicitation of Proxies may be obtained by reading the proxy statement for the special meeting.

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, inability to complete the acquisition of the Company by Cap Rock Holding Corporation and other risks detailed from time to time in the Company's Securities and Exchange Commission filings.


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

"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.

©2006 SEMCO ENERGY, Inc., All Rights Reserved.