5 1 form5dwt.txt FORM 5 FOR DWT FOR YEAR ENDED 12-31-02 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 5 ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP [ ] Check box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. [ ] Form 3 Holdings Reported [ ] Form 4 Transactions Reported 1. Name and Address of Reporting Person(s) Thomason, Donald W. 1105 Capital Avenue, S.W. Battle Creek, MI 49015 2. Issuer Name and Ticker or Trading Symbol SEMCO Energy, Inc. (SEN) 3. I.R.S. Identification Number of Reporting Person, if an entity (Voluntary) 4. Statement for Month/Year 12/02 5. If Amendment, Date of Original (Month/Year) 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) [X] Director [ ] 10% Owner [ ] Officer (give title below) [ ] Other (specify below) 7. Individual or Joint/Group Filing (Check Applicable Line) [X] Form filed by One Reporting Person [ ] Form filed by More than One Reporting Person

SIGNATURE OF REPORTING PERSON /S/ By: Sherry L. Abbott For: Donald W. Thomason DATE 01/09/03

THOMASON DONALD W 5