Power Station with a capacity of 2,980 MW at Sipat, Bilaspur; LARA Super Thermal Power Station with a nameplate capacity of 1600MW and Korba Super Thermal Power Station with a capacity of 2,600 MW at Korba, while CSEB's units have a thermal capacity of 1,780 MW and hydel capacity of 130 MW. Apart from NTPC and CSEB, there are a number of private generation units of large and small capacity. The state government has pursued a liberal policy with regard to captive generation which has resulted in a number of private companies coming up. The state has a potential of 61,000 MW of additional thermal power in terms of availability of coal for more than 100 years and more than 2,500 MW hydel capacity. To use this vast potential, substantial additions to the existing generation capacity are already underway. Steel sector The steel industry is one of the biggest heavy industries of Chhattisgarh. Bhilai Steel Plant, Bhilai operated by SAIL, with a capacity of 5.4 million tonnes per year, is regarded as a significant growth indicator of the state. More than 100 steel rolling mills, 90 sponge iron plants and ferro-alloy units are in Chhattisgarh. Along with Bhilai, today Raipur, Bilaspur, Korba and Raigarh have become the steel hub of Chhattisgarh. Today, Raipur has become the centre of the steel sector, the biggest market for steel in India. Aluminium sector The aluminium industry of Chhattisgarh was established by Bharat Aluminium Company Limited, which has a capacity of around 5,700,000 tonnes each year. Natural resources Mineral deposits Chhattisgarh is rich in minerals. It produces 50% of the country's total cement production. Due to proximity to the western States of Maharashtra and Gujarat it has the highest producing coal mines in India. It has the highest output of coal in the country with second-highest reserves. It is third in iron ore production and first in tin production. Limestone, dolomite and bauxite are abundant. It is the only tin ore-producing state in India. Other commercially extracted minerals include corundum, garnet, quartz, marble, alexandrite and diamonds. Gevra, Dipka, Kusmunda open cast coal mines in Korba, Chhattisgarh are largest in India and biggest men-made structure visible in satellite images of India. Major coal companies are SECL, Adani, Jindal which operates multiple coal mines across north east Chhattisgarh. Information and technologies In recent years, Chhattisgarh is also receiving exposure in information technology (IT) projects and consultancy.