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Exhibit (21)




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01 CMS Energy Corporation
 
   02
    
    CMS Capital LLCCMS Capital LLC is a Michigan limited liability company formed to assist in securing
financing for CMS Energy Corporation and its subsidiaries and affiliates.02
    
    CMS Enterprises CompanyCMS Enterprises Company is a Michigan corporation that, through various subsidiaries and
affiliates, is engaged in diversified businesses in the United States and in select
international markets.02
    
    CMS Land CompanyCMS Land Company is a Michigan corporation formed to act as a repository for any unused
real property formerly owned by Consumers Energy Company, and hold the same for possible
non-utility development.02
    
    Consumers Energy CompanyConsumers Energy Company is a Michigan corporation engaged in the generation, purchase,
distribution and sale of electricity, and in the purchase, storage, distribution and sale
of natural gas, in the lower peninsula of the State of Michigan.02
    
    Dearborn Industrial Energy, L.L.C.Dearborn Industrial Energy, L.L.C. is a Michigan limited liability company that holds the
ownership interest in Dearborn Industrial Generation, L.L.C.
 The name, state of organization and nature of business of each subsidiary and their subsidiaries
are described below:
 2




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02 CMS Capital, L.L.C.
 
 03
    
    EnerBank USAEnerBank USA is a Utah corporation engaged in the business of an industrial loan
corporation to issue thrift certificates of deposit and thrift savings accounts for
the payment of money, to issue capital notes or debentures to receive payments with or
without allowance for interest.
 3




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02 CMS Enterprises Company
 
 03
    
    CMS Childress County Wind One LLCCMS Childress County Wind One LLC is a Michigan limited liability company for to
develop, own and operate a wind farm in Childress County, Texas.03
    
    CMS Distributed Power, L.L.C.CMS Distributed Power, L.L.C is a Michigan limited liability company formed for the
purpose of aggregating the output from multiple generators to have power available on
demand.03
    
    CMS Energy Asia Private Limited (in process of liquidation)CMS Energy Asia Private Limited, a Singapore corporation, is active and was involved in
the development of electrical generation and distribution opportunities, gas
transmission, storage and distribution opportunities, electrical and gas marketing
opportunities and development opportunities in Asia and the Pacific Rim. CMS Energy
Asia Private Limited is in the process of liquidation.03
    
    CMS Energy Resource Management CompanyCMS Energy Resource Management Company (CMS ERM) is a Michigan corporation
concentrating on the purchase and sale of energy commodities in support of CMS Energys
generating facilities.04
    
    CMS ERM Michigan LLCCMS ERM Michigan LLC is a Michigan limited liability company formed for the sole
purpose of taking an assignment of the Ford/Rouge Electricity Sales Agreements from
Dearborn Industrial Generation L.L.C. and to perform those contracts. CMS ERM
Michigan LLC was formerly known as CMS MS&T Michigan L.L.C.04
    
    CMS Viron CorporationCMS Viron Corporation is a Missouri corporation formed to provide services in the
area of energy usage analysis and the engineering and implementation of energy
conservation measures.03
    
    CMS Energy South America CompanyCMS Energy South America Company is a Cayman Islands corporation formed to provide for
consolidation of the development expenses and activity in Argentina and Brazil.
 4




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03
    
    CMS Enterprises Development, L.L.C.CMS Enterprises Development, L.L.C. is a Michigan limited liability company formed to
invest in various projects.03
    
    CMS Gas Transmission CompanyCMS Gas Transmission Company is a Michigan corporation organized to engage in the
transmission, storage and processing of natural gas.04
    
    CMS Energy Investment LLCCMS Energy Investment LLC is a Delaware limited liability company
that acts as a holding company of CMS Energys interests in the Michigan Gas
Transmission assets.04
    
    CMS Gas Argentina CompanyCMS Gas Argentina Company is a Cayman Islands corporation with an equity interest
in Transportadora de Gas del Norte S.A., an Argentine corporation, which provides
natural gas transmission services to the northern and central parts of Argentina.05
    
    Servicios de Aguas de Chile CMS y Compania Limitada (.008%)Servicios de Aguas de Chile CMS y Compania Limitada is a chilean corporation formed
to hold marine concession (beach access and water extraction) for a desalination plant.05
    
    Transportadora de Gas del Norte S.A. (TGN) (25%)Transportadora de Gas del Norte S.A. (TGN) is an Argentina corporation that provides
natural gas transmission services to the northern and central parts of Argentina and
owns natural gas pipelines.04
    
    CMS International Ventures, L.L.C. (37.01%) (See Exhibit A for list of subsidiaries)CMS International Ventures, L.L.C. is a Michigan limited liability company, formed
to own, manage and sell certain of CMS Energys international investments.03
    
    CMS Generation Jegurupadu I Limited Duration Company (1%)CMS Generation Jegurupadu I Limited Duration Company is a Cayman Islands company and
one of the owners in the operating company which operates the GVK project, a 235-MW gas- and
naphtha-fired independent power generating plant in Jegurupadu, Andhra Pradesh Province, India04
    
    Jegurupadu O&M Company Mauritius (50%)Jegurupadu O&M Company Mauritius, a Mauritius company, is inactive and in the process
of liquidation.
 5




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03
    
    CMS Generation Jegurupadu II Limited Duration Company (1%)CMS Generation Jegurupadu II Limited Duration Company is a Cayman Islands company
and one of the owners in the operating company which operates the GVK project, a 235-MW gas-
and naphtha-fired independent power generating plant in Jegurupadu, Andhra Pradesh Province,
India04
    
    Jegurupadu O&M Company Mauritius (50%)Jegurupadu O&M Company Mauritius, a Mauritius company, is inactive and in the process
of liquidation.03
    
    CMS Generation San Nicolas Company (.1%)CMS Generation San Nicolas Company is a Michigan corporation which holds interests in
certain Argentine assets.04
    
    Inversora de San Nicolas, S.A. (.1%)05
    
    Centrales Termica San Nicolas S.A. (88%)04
    
    Nitrotec Corporation (50%)Nitrotec Corporation is a Delaware corporation formed to invest in plants that
extract helium from natural gas.03
    
    CMS International Ventures, L.L.C. (61.49%) (See Exhibit A for list of subsidiaries)CMS International Ventures, L.L.C. is a Michigan limited liability company, formed to own,
manage and sell certain of CMS Energys international investments.03
    
    CMS Resource Development CompanyCMS Resource Development Company is a Michigan corporation formed to pursue and develop
various power sources outside the United States.03
    
    CMS Texas LLCCMS Texas LLC is a Texas limited liability company formed to conduct business activities
in Texas.03
    
    HYDRA-CO Enterprises, Inc. (See Exhibit B for list of subsidiaries)HYDRA-CO Enterprises, Inc. is a New York corporation involved in the management and
operation of various power plants. The plants are fueled by coal, natural gas, waste wood
and water (hydro).03
    
    New Generation Co.New Generation Co. is a Delaware limited liability company formed to conduct business activities
for CMS Enterprises Company as determined appropriate in the future.
 6




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02 CMS Land Company
 
 CMS Land Company is a Michigan corporation formed to act as a repository for any unused
real property formerly owned by Consumers Energy Company, and hold the same for possible
non-utility development.03
    
    Beeland Group LLCBeeland Group LLC is a Michigan limited liability company formed to acquire land and
other property in order to provide a disposal well for the Bay Harbor properties.
 7




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02 Consumers Energy Company
 
 The consolidated operations of Consumers Energy Company (Consumers) account for the
largest share of CMS Energys total assets and income and account for a substantial portion
of its revenues. The name, state of organization and nature of business of Consumers
subsidiaries are described below:03
    
    CMS Engineering Co.CMS Engineering Co. is a Michigan corporation engaged in offering design, engineering,
project management and related construction services to natural gas utilities, natural
gas exploration and production companies, and other energy businesses.03
    
    Consumers Campus Holdings, LLCConsumers Campus Holdings, LLC is a Michigan limited liability company formed for the
purpose of being the lessee in the synthetic lease financing of the new Consumers Energy
Company office building located in downtown Jackson, Michigan.03
    
    Consumers Funding LLCConsumers Funding LLC is a Delaware limited liability company formed for the purpose of
acting as issuer of securitization bonds and assignee of property transferred by
Consumers.03
    
    Consumers Receivables Funding II, LLCConsumers Receivables Funding II, LLC is a Delaware limited liability
company that buys certain accounts receivable from Consumers Energy
Company and sells them to a third party.03
    
    ES Services CompanyES Services Company is a Michigan corporation formed for the purpose of offering design,
engineering, project management and related services primarily to electric utilities and
generation facilities.03
    
    Maxey Flats Site IRP, L.L.C. (1.71%)Maxey Flats Site IRP, L.L.C. is a Virginia limited liability company formed for the
purpose of environmental remediation of a former low-level radioactive waste disposal
site.
 8




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03
    
    MEC Development Corp.MEC Development Corp. is a Michigan corporation that previously held assets transferred
to, and was holder of certain bonds issued by, the Midland Cogeneration Venture Limited
Partnership, a Michigan limited partnership.
 9




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02 Dearborn Industrial Energy, L.L.C.
 
 03
    
    Dearborn Industrial Generation, L.L.C.Dearborn Industrial Generation, L.L.C. is a Michigan limited liability company engaged
in the operation of the Ford/Rouge Cogeneration Facility in Dearborn, Michigan,
 10




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Subsidiaries of CMS International Ventures, L.L.C.
 
 04
    
    CMS Atacama CompanyCMS Atacama Company is a Cayman Island company which is inactive and in the process of
dissolution.04
    
    CMS Electric & Gas, L.L.C.CMS Electric & Gas, L.L.C. is a Michigan limited liability company. CMS
International Distribution LLC and CMS Electric and Gas Company merged in December
2002 to form CMS Electric & Gas, L.L.C.05
    
    CMS (Barbados), SRLCMS (Barbados), SRL is a Barbados entity which was formed for the purpose of
Holding investments in Venezuela.06
    
    CMS Venezuela, S.A.CMS Venezuela, S.A. is a Venezuelan corporation formed to operate Sistema
Electrico Nueva Esparta C.A. (SENECA).06
    
    ENELMAR S.A.ENELMAR S.A. is a Venezuelan corporation formed to CMS Electric & Gas,
L.L.C.s interests in the privatized electric system of the State of Nueva Esparta.05
    
    CMS Electric and Gas Sucursal (branch) Argentina-in process of closureCMS Electric and Gas Sucursal (branch) Argentina is an Argentine branch office of CMS Electric & Gas, L.L.C., which
provided technical assistance in generation and distribution companies.05
    
    CMS Empreendimentos Ltda (99.99%)CMS Empreendimentos Ltda, a Brazilian corporation was established as CMS Electric & Gas, L.L.C.s Rio office in Brazil.05
    
    CMS Participações e Negócios S/A (99.99%)CMS Participações e Negócios S/A, a Brazilian corporation formed to hold real estate in Brazil.
 11




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04
    
    CMS Generation Jegurupadu I Limited Duration Company (99%)CMS Generation Jegurupadu I Limited Duration Company is a Cayman Islands company and
one of the owners in the operating company which operates the GVK project, a 235-MW gas-
and naphtha-fired independent power generating plant in Jegurupadu, Andhra Pradesh
Province, India05
    
    Jegurupadu O&M Company Mauritius (50%)Jegurupadu O&M Company Mauritius, a Mauritius company, is inactive and in the
process of liquidation.04
    
    CMS Generation Jegurupadu II Limited Duration Company (99%)CMS Generation Jegurupadu II Limited Duration Company is a Cayman Islands company
and one of the owners in the operating company which operates the GVK project, a 235-MW
gas- and naphtha-fired independent power generating plant in Jegurupadu, Andhra Pradesh
Province, India05
    
    Jegurupadu O&M Company Mauritius (50%)Jegurupadu O&M Company Mauritius, a Mauritius company, is inactive and in the
process of liquidation.04
    
    CMS Luxembourg S.A.R.L.CMS Luxembourg S.A.R.L. is a Luxembourg company which was formed in connection
with the former Goldfields pipeline acquisition and is in the process of liquidation.04
    
    Jegurupadu CMS Generation Company Ltd., a Mauritius company is inactive and in
the process of liquidation
 12




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Subsidiaries of HYDRA-CO Enterprises, Inc.
 
 04
    
    CMS Exeter LLCCMS Exeter LLC is a Michigan limited liability company formed to facilitate the
restructuring of Oxford/CMS Development Limited Partnership and Exeter Energy
Limited Partnership for state tax planning purposes.05
    
    Exeter Energy Limited Partnership (2% GP)05
    
    Oxford/CMS Development Limited Partnership (1% GP)04
    
    CMS Generation Filer City, Inc.CMS Generation Filer City, Inc. is a Michigan corporation involved as a 50% General
Partner in the T.E.S. Filer City Station Limited Partnership, a Michigan limited
partnership that is the owner of the 54 megawatt (net) wood chip and coal-fired
electric generating station in Filer City, Michigan.05
    
    T.E.S. Filer City Station Limited Partnership (50%)04
    
    CMS Generation Filer City Operating LLCCMS Generation Filer City Operating LLC is a Michigan limited liability company
formed to operate a coal and waste wood-fueled power plant near Filer City,
Michigan owned by the T.E.S. Filer City Station Limited Partnership.04
    
    CMS Generation Genesee CompanyCMS Generation Genesee Company is a Michigan corporation involved as a 1% General
Partner in the Genesee Power Station Limited Partnership, a Delaware limited
partnership, which owns and operates a 35-megawatt (net) waste wood-fired electric
generating facility located in Genesee County, Michigan.05
    
    Genesee Power Station Limited Partnership (1%)06
    
    GPS Newco, L.L.C (50%)GPS Newco, L.L.C. is a Kansas limited liability company formed for the purpose of
facilitation financing and/or restricting liabilities of CMS equity invested in
Genesee Power Station Limited Partnership.
 13




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04
    
    CMS Generation Grayling CompanyCMS Generation Grayling Company is a Michigan corporation involved as a General
Partner in Grayling Generating Station Limited Partnership, a Michigan limited
partnership, that owns a waste wood-fueled power plant in Grayling, Michigan.
Grayling Generating Station Limited Partnership owns GGS Holdings Company, a
Michigan corporation, which is a General Partner in AJD Forest Products Limited
Partnership, a Michigan limited partnership, that operates a sawmill adjacent to
the Grayling Generating Station and also supplies waste wood fuel to Grayling
Generating Station. Grayling Generating Station Limited Partnership is a Limited
Partner in AJD Forest Products Limited Partnership.05
    
    Grayling Generating Station Limited Partnership (1%)06
    
    AJD Forest Products Limited Partnership (49.5% LP)06
    
    GGS Holdings CompanyA Michigan corporation that owns a General Partner interest in AJD Forest Products
Limited Partnership, a Michigan limited partnership.07
    
    AJD Forest Products Limited Partnership (.5% GP)05
    
    Grayling Partners Land Development, L.L.C. (1%)A Michigan limited liability company formed to acquire land near the Grayling facility
for potential development of an ash disposal site.04
    
    CMS Generation Grayling Holdings CompanyCMS Generation Grayling Holdings Company is a Michigan corporation involved as a
Limited Partner in Grayling Generating Station Limited Partnership, a Michigan
limited partnership. Grayling Generating Station Limited Partnership owns GGS
Holdings Company, a Michigan corporation that owns a General Partner interest in
AJD Forest Products Limited Partnership, a Michigan limited partnership.05
    
    Grayling Generating Station Limited Partnership (49%)06
    
    AJD Forest Products Limited Partnership (49.5% LP)06
    
    GGS Holdings CompanyA Michigan corporation that owns a General Partner interest in AJD Forest Products
Limited Partnership, a Michigan limited partnership.07
    
    AJD Forest Products Limited Partnership (.5% GP)
 14




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05
    
    Grayling Partners Land Development, L.L.C. (49%)A Michigan limited liability company formed to acquire land near the Grayling facility
for potential development of an ash disposal site.04
    
    CMS Generation Holdings CompanyCMS Generation Holdings Company is a Michigan corporation involved as a limited
partner in various partnerships.05
    
    Genesee Power Station Limited Partnership (48.75%)05
    
    GPS Newco, L.L.C. (50%)GPS Newco, L.L.C. is a Kansas limited liability company formed for the purpose of
facilitation financing and/or restricting liabilities of CMS equity invested in
Genesee Power Station Limited Partnership.06
    
    Genesee Power Station Limited Partnership (.25%)07
    
    GPS Newco, L.L.C. (50%)GPS Newco, L.L.C. is a Kansas limited liability company formed for the
purpose of facilitation financing and/or restricting liabilities of CMS
equity invested in Genesee Power Station Limited Partnership.04
    
    CMS Generation Honey Lake CompanyCMS Generation Honey Lake Company is a Michigan corporation with a General
Partnership interest and a Limited Partnership interest in H L Power Company, a
California limited partnership that uses waste wood and geothermal fluid to
generate a 30-megawatt (net) electric generating station in Lassan County,
California. It is also involved as General Partner in Honey Lake Energy I LP, and
Honey Lake Energy II LP, both Michigan limited partnerships formed to own limited
partnership interests in H L Power Company.05
    
    Honey Lake Energy I L.P. (99%)06
    
    H L Power Company (18.65%)05
    
    Honey Lake Energy II L.P. (99%)06
    
    H L Power Company (18.65%)05
    
    H L Power Company (.5%)04
    
    CMS Generation Michigan Power L.L.C.CMS Generation Michigan Power L.L.C. is a Michigan limited liability company formed
to own generating units which are to be sited in Michigan for the purpose of
generating power during peak demand periods.
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04
    
    CMS Generation Operating Company II, Inc.CMS Generation Operating Company II, Inc. is a New York corporation formed to operate
power plants, primarily in the United States.05
    
    HCO-Jamaica, Inc.HCO-Jamaica, Inc. is a New York corporation involved in the operation of a 60 MW
Diesel project in Jamaica.04
    
    CMS Generation Operating LLCCMS Generation Operating LLC is a Michigan limited liability company involved in
the operation of various power plants throughout the United States.04
    
    CMS Generation Recycling CompanyCMS Generation Recycling Company is a Michigan corporation that owns 50% of
Mid-Michigan Recycling, L.C. Mid-Michigan Recycling, L.C. was created to be
involved in supplying waste wood fuel for the Genesee Power Station Limited
Partnership.05
    
    Mid-Michigan Recycling, L.C. (50%)Mid-Michigan Recycling, L.C. is a Michigan limited liability company involved in
supplying waste wood fuel for the Genesee Power Station Limited Partnership.04
    
    CMS Palermo Energy CompanyA Nova Scotia corporation formed to be the limited partner in the Palermo Energy Limited Partnership-in process of
liquidation.05
    
    Palermo Energy General Partner Ltd.A Nova Scotia limited liability company formed to be the general partner of the Palermo Energy Limited Partnership-in
process of liquidation.06
    
    Palermo Energy Limited Partnership (.001%)05
    
    Palermo Energy Limited Partnership (99.999%)04
    
    CMS Prairie State LLCCMS Prairie State LLC is an Michigan limited liability company formed to hold a membership interest in an LLC which would
hold an interest in the Prairie State mine mouth coal generation project.
 16




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04
    
    Dearborn Generation Operating, L.L.C.Dearborn Generation Operating, L.L.C. is a Michigan limited liability company formed to
operate the Ford/Rouge Project.04
    
    Exeter Energy Limited Partnership (50%)04
    
    Honey Lake I L.P. (1%)05
    
    H L Power Company (18.65%)04
    
    Honey Lake Energy II L.P. (1%)05
    
    H L Power Company (18.65%)04
    
    Craven County Wood Energy Limited Partnership (44.99%)04
    
    HCE-Biopower, Inc.HCE-Biopower, Inc. is a New York corporation formed to hold partnership interests in
various power projects.05
    
    IPP Investment Partnership (51%)06
    
    Craven County Wood Energy Limited Partnership (.01%)04
    
    HCE-Jamaica Development, Inc.HCE-Jamaica Development, Inc. is a New York corporation formed to be involved in
The development and operation of a 60 MW diesel project in Jamaica.04
    
    IPP Investment Partnership (49%)05
    
    Craven County Wood Energy Limited Partnership (.01%)04
    
    New Bern Energy Recovery, Inc.New Bern Energy Recovery, Inc. is a Delaware corporation formed to participate as a
General partner in the Craven County Wood Energy limited partnership formed to construct,
operate and own a wood-fired electric generating facility in Craven County, North Carolina.05
    
    Craven County Wood Energy Limited Partnership (5%)04
    
    Oxford/CMS Development Limited Partnership (99%)05
    
    Exeter Energy Limited Partnership (48%)04
    
    Servicios de Aguas de Chile CMS y Compania Limitada (99.992%)Servicios de Aguas de Chile CMS y Compania Limitada is a chilean corporation formed
To hold marine concession (beach access and water extraction) for a desalination plant.
 17




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04
    
    South India Natural Gas Marketing Company Private Limited is a company formed in India-
in process of liquidation.04
    
    Sterling Wind LLCSterling Wind LLC is a Delaware limited liability company formed to own wind
power projects in Connecticut.04
    
    TN LNG & Power Company Private Limited is a company formed in India-in process of
liquidation.
 18