Hydroelectricity is the primary source of Ghanas power. Ghanas current hydroelectric capacity of 1.2 GW is located at Akosombo (912 MW) and Kpong (160 MW). In 2005, the turbines of the Akosombo generation station underwent retrofitting to increase its installed capacity by about 108 MW. The Ghanaian government is considering additional hydroelectric projects to be built on a Build Operate Transfer (BOT) financing scheme. One of these proposed projects is the $700-million, Bui hydroelectric project, which would be located on the Black Volta and have a generation capacity of 400 MW. In addition to increasing the domestic electricity supply, power generated from Bui could be exported to Burkina Faso, Mali and CÔte dIvoire. An investment decision on the Bui hydroelectric project is to be made by the end of 2006, and a maximum of five years would be needed to complete the project. Additional hydroelectric projects include the Hemang and Juale hydroelectric power dams (operational by 2015) and the Pwalugu hydroelectric power dam (operational by 2020). The generation capacity of Hemang, Juale and Pwalugu would be developed to 93 MW, 87 MW, and 48 MW respectively. In addition to increasing hydroelectric output, Ghana plans to increase and expand thermal generating capacity. Current thermal facilities are located at Tema and Takoradi. Additional capacity is planned at Tano (gas-fired barges) and at Tema. Volta River Authority (VRA) and GNPC have constructed transmission lines and substations at Essiama and Elubo in the Western Region to feed the power generated at Tano into the national grid. The WAGP, which will transport Natural Gas from Nigeria to the Takoradi power plant in Ghana, is expected to deliver the first natural gas in December 2006. The transmission Pipeline will provide Ghana (in addition to Benin and Togo) with a reliable energy infrastructure and competitively priced natural gas. In March 2006, the minister for energy of Ghana announced that the International Finance Corporation (IFC) of the World Bank Group had given approval for negotiations on financing the expansion of the Aboadze thermal power plant at Takoradi. The cost of the expansion project is estimated at $215 million. The upgrade would convert the plant from burning crude Oil to natural gas, which it would receive from Nigeria through the WAGP. CMS Energy, a US-based company, has a 90 percent stake in the Takoradi facility, and the VRA holds the remaining 10 percent. The Electric Company of Ghana (ECG) is responsible for electricity distribution to the Ashanti, Western, Central, Eastern, Greater Accra and Volta regions. VRA is responsible for generation and for the distribution of electricity in the Brong Ahafo, Northern, Upper East and Upper West regions. When the WAGP is completed, VRA plans to convert oil-fired facilities at Takoradi and Tema to natural gas.