Exhibit  99.1  -  Press  release  issued  September  16,  2003
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SEMCO ENERGY
28470 13 Mile Road Suite 300
Farmington Hills, MI 48334




FOR  IMMEDIATE  RELEASE

ANALYSTS  CONTACT:  THOMAS  CONNELLY
DIRECTOR  OF  INVESTOR  RELATIONS
Phone:  248-702-6240
FAX:  248-702-6303
E-mail:  thomas.connelly@semcoenergy.com

MEDIA  CONTACT:  FRANCIS  R.  LIEDER,  JR.
DIRECTOR  OF  CORPORATE  COMMUNICATIONS  &  MEDIA  AFFAIRS
Phone:  810-987-2200  Ext.  4186
Fax:  810-989-4098
E-mail:  francis.lieder@semcoenergy.com



                  SEMCO ENERGY TO SELL ALASKA PIPELINE COMPANY

     FARMINGTON  HILLS,  MI, September 16, 2003,   SEMCO ENERGY, Inc. (NYSE:SEN)
and  Atlas  Pipeline  Partners,  L.P.  (AMEX:APL) today announced that SEMCO has
entered  into  a  definitive  agreement to sell Alaska Pipeline Company (APC) to
Atlas  Pipeline  Partners,  L.P.  for  $95  Million.
     APC  owns  and  operates the high-pressure gas pipelines that transport gas
from Alaska's Cook Inlet gas fields to ENSTAR Natural Gas Company's distribution
system  and  various  commercial  customers  of ENSTAR.  ENSTAR is a division of
SEMCO  ENERGY,  serving  112,000  customers  in  south-central Alaska, including
Anchorage.  APC  has  no  employees  and  ENSTAR  is  APC's  only  customer.
     Atlas  Pipeline  Partners,  L.P.  owns  and  operates  natural gas pipeline
gathering  systems  through  its  operating  partnership  and  its  operating
subsidiaries.  Its  primary  asset  consists  of  approximately  1,380  miles of
intrastate  gathering  systems  located  in  eastern  Ohio, western New York and
western  Pennsylvania.
     The  sale  is  structured  to  have  no  effect  on  ENSTAR's  customers or
employees.  ENSTAR  will  purchase all of APC's gas transmission capacity for at
least 10 years and will operate APC's pipelines for a minimum of 5 years.  There
are  no  plans  to  change  rates,  the  services  offered, pipeline operations,
customer  service,  gas supply, or staffing as a result of the sale. The sale is
subject  to  various  regulatory approvals, including approval by the Regulatory
Commission of Alaska. McDonald Investments Inc. acted as adviser to SEMCO ENERGY
in  the  transaction.
     "SEMCO  ENERGY's  mission  is to provide excellent service to its customers
and  an attractive investment return to its shareholders.  We have been pursuing
actions,  including  the sale of certain Company assets, that will pay down debt
in  order  to improve the financial position and thus the long-term value of the
Company.  The  proceeds  from the sale of APC will be used to reduce debt and is
consistent  with  the  goal  of  improving  our  capital structure," said Marcus
Jackson,  SEMCO  ENERGY  Chairman,  President  and  Chief  Executive  Officer.
     Michael  Staines, President and Chief Operating Officer of Atlas, expressed
his  pleasure  at  reaching  this  agreement  and  said  "Atlas  is aware of the
importance of APC's pipeline system to south-central Alaska and looks forward to
participating  in the continuing development of the pipelines necessary to serve
ENSTAR's  customers."

     SEMCO  ENERGY,  Inc. distributes natural gas to more than 385,000 customers
combined  in  Michigan,  as  SEMCO  ENERGY GAS COMPANY, and in Alaska, as ENSTAR
Natural  Gas  Company.  It  owns and operates businesses involved in natural gas
pipeline  construction  services, 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.