SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: September 19, 2002 SEMCO ENERGY, INC. (Exact name of registrant as specified in its charter) MICHIGAN 0001-15565 38-2144267 (State of incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 28470 13 Mile Road, Suite 300, Farmington Hills, MI 48334 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code 248-702-6000 ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (c) Exhibits 1(a) Underwriting Agreement dated September 16, 2002 among Registrant and representative of the underwriters relating to an offering of 6.49% Senior Notes Due 2009. 4(a) Fourth Supplemental Indenture dated as of September 19, 2002 between the Registrant as Issuer and Bank One Trust Company, National Association, as Trustee with form of 6.49% Senior Notes Due 2009 attached thereto as Exhibit A. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized. SEMCO Energy, Inc. (Registrant) Dated: September 19, 2002 By: /s/ John E. Schneider ------------------------------------- John E. Schneider Senior Vice President, Treasurer and Chief Financial Officer 3 Exhibit Index 1(a) Underwriting Agreement dated September 16, 2002 among Registrant and representative of the underwriters relating to an offering of 6.49% Senior Notes Due 2009. 4(a) Fourth Supplemental Indenture dated as of September 19, 2002 between the Registrant as Issuer and Bank One Trust Company, National Association, as Trustee with form of 6.49% Senior Notes Due 2009 attached thereto as Exhibit A. 4