Ceará state government is setting up an institute to provide railroad travel for 12,000 workers a year, while Petrobras is also building another refinery. Paulo Roberto Costa, its downstream director, envisages trains transporting soybeans, corn, and iron ore from the interior to the ports, and returning with oil. Journey times to Europe and America will be three or four days less than from south-eastern ports. The 1,728-km line will one day carry 30 million tonnes of cargo a year. The North-South railway and the Carajás railray in Maranhão are important logistics corridors, transporting the iron ore from the Serra dos Carajás in Pará and draining the agricultural production (soybeans, corn, cotton) of southern Maranhão, Tocantins, Goiás and Mato Groso, to the ports of Itaqui and Ponta da Madeira, in São Luís. Other products are also transported, such as cellulose and fuels. Mines Hydroelectric dams and reservoirs Brazil counts on hydroelectricity for more than 80% of its electricity.Alagoas / Sergipe Xingó Hydroelectric Power Plant 3162 BahiaApollonius Sales (Moxoto) Hydroelectric Power Plant 400 Paulo Afonso Complex Hydroelectric Power Plant 1417.2 Paulo Afonso IV Hydroelectric Power Plant 2642.4 Sobradinho Hydroelectric Power Plant 1050 MaranhãoBoa Esperanca (Castelo Branco) Hydroelectric Power Plant 237.4 Estreito Hydroelectric Plant- 1.087Pernambuco'Luiz Gonzaga (Itaparica) Hydroelectric Power Plant 1479.6 In 2018, in Maranhão, natural gas exploration in the Parnaíba Basin has the capacity to produce 8.4 million m³ of gas per day, exploited by Eneva, with the implementation of 153 km of gas pipelines, at the cost of R $9 billion. Such production is destined for the production of electric energy in the Parnaíba Power Station, with 1.4 GW of capacity. The thermal power stations has important composition in the generation of energy in the region, with other examples being the Campina Grande Power Starion, the Pecém Power Station and the Jorge Lacerda Power Station, among others. In 2017, due to low levels of reservoirs, wind energy accounted for 50% of the electric power generation in the region, with the states of Rio Grande do Norte, with 3,722 MW and 137 parks; Bahia, with 2,594 MW and 100 parks; Ceará, with 1,950 MW and 75 parks; Piauí, with 1,443 MW and 52 parks; Pernambuco, with 781 MW and 34 parks; Maranhão, with 220 MW and 8 parks; and Paraíba, with 157 MW and 15 parks. New investments, seeking to diversify the northeastern energy matrix and promote energy security, allowed in 2017