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Roaring 40s

An Australian electricity-generation joint venture focused on wind power projects.

Last updated August 25, 2026

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Overview

Roaring 40s was an electricity-generation company established in 2005 as a 50:50 joint venture between Hydro Tasmania and CLP Group. Its business centered on the development and ownership of wind-power assets across several Asia-Pacific markets. The venture operated or planned 13 sites in Australia, China, Hong Kong, and India, giving it a regional footprint rather than a single-country utility profile. The company’s Australian portfolio included the Cathedral Rocks, Goyder, Musselroe, Waterloo, and Woolnorth wind farms. These projects represented the core of its renewable-generation identity and connected the brand with the expansion of commercial wind energy in Australia. Roaring 40s also pursued projects outside Australia, notably in China and India, while its stated operating and planning footprint included Hong Kong. The joint venture’s structure reflected the complementary positions of its partners. Hydro Tasmania contributed the capabilities of an Australian electricity generator with a substantial renewable-energy orientation, while CLP Group brought the scale and regional reach of a major Asia-Pacific energy company. Roaring 40s consequently served as a vehicle for developing and holding wind-generation assets across multiple markets. The venture began to unwind in 2009. In June of that year, CLP Group took over Roaring 40s’ wind farms in China and India. The broader joint venture was dissolved in June 2011, at which point its remaining assets were divided between Hydro Tasmania and CLP Group. Roaring 40s therefore no longer operates as an independent company. Its historical significance lies in its role as a cross-border renewable-energy platform and in the wind farms developed or owned during its period of operation.

History

Roaring 40s was formed in 2005 as an equal joint venture between Hydro Tasmania and CLP Group. The company was created as an electricity generator with a particular emphasis on wind power, linking Hydro Tasmania's Australian renewable-energy base with CLP Group's broader Asia-Pacific energy interests. During its operating period, Roaring 40s developed, owned, or planned wind-energy sites in Australia, China, Hong Kong, and India. The company was associated with 13 sites in operation or under planning. Its Australian assets included Cathedral Rocks, Goyder, Musselroe, Waterloo, and Woolnorth. These projects formed the principal identifiable portfolio of the brand and positioned it as a regional wind-power platform rather than a conventional retail electricity brand. The venture's international expansion extended beyond Australia into China and India, with Hong Kong also included in its operating or planning footprint. The available historical record identifies the company primarily through its generation assets and joint-venture structure; detailed information about individual project commissioning dates, production volumes, management, and financial performance is not established in the supplied reference material. In June 2009, CLP Group took over Roaring 40s' wind farms in China and India. This transfer marked a significant change in the venture's geographic and asset structure. The joint venture itself continued until June 2011, when it was dissolved and its assets were divided between Hydro Tasmania and CLP Group. Following that dissolution, Roaring 40s ceased to exist as an independent operating company. Its history is consequently that of a time-limited renewable-energy partnership whose principal legacy was a portfolio of wind farms and development projects across Australia and parts of Asia.

  • 2011

    Joint venture is dissolved

    [1]

    The Roaring 40s partnership ends, and its assets are divided between Hydro Tasmania and CLP Group.

  • 2009

    Chinese and Indian wind assets transfer to CLP Group

    [1]

    CLP Group takes over Roaring 40s' wind farms in China and India.

  • 2005

    Roaring 40s is established

    [1]

    Hydro Tasmania and CLP Group form Roaring 40s as a 50:50 electricity-generation joint venture focused on wind power.

Products and positioning

A cross-border renewable-energy venture focused on developing and owning commercial wind farms in Australia and selected Asia-Pacific markets.

  • Wind-power generation

    Australian wind-farm portfolio

    Roaring 40s owned wind farms in Australia including Cathedral Rocks, Goyder, Musselroe, Waterloo, and Woolnorth. Together, these projects represented the company's principal Australian generation and development portfolio.

  • Wind-farm development

    International wind-power projects

    The company operated or planned wind-energy sites across China, Hong Kong, and India in addition to Australia. The Chinese and Indian wind farms were taken over by CLP Group in 2009.

Brand decisions

  • 2011

    Dissolution of the Roaring 40s joint ventureM&A

    Background

    Hydro Tasmania and CLP Group ended their equal ownership arrangement after six years of operation.

    Action taken

    The joint venture was dissolved and its assets were divided between the two partners.

    Aftermath

    Roaring 40s ceased to operate as an independent company.

  • 2009

    Transfer of China and India wind farms to CLP GroupM&A

    Background

    The partners began separating the assets of the Roaring 40s joint venture.

    Action taken

    CLP Group took over the venture's wind farms in China and India.

    Aftermath

    The transfer preceded the eventual dissolution of the joint venture in 2011.

Sources1 sources

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