Hindustan Construction Company (HCC) is an Indian infrastructure company headquartered in Mumbai. Some of HCC's major projects include the Kolkata Metro (India's first underground metro railway), Mumbai Pune Expressway (India's first six-lane concrete expressway), and the Pir Panjal Rail Tunnel in Jammu and Kashmir (India's largest railway tunnel). HCC also developed the Lavasa hill city near Pune, billed as India's first planned hill city. HCC and its subsidiaries have constructed over 28% of India's hydropower capacity and 65% of its nuclear power generation capacity.