Since its founding in 1995, InterGen has had a successful track record of developing, constructing, and operating power projects around the world.

  • International Generating Company “InterGen” was officially incorporated on March 20, 1995 when Bechtel and Pacific Gas & Electric (PG&E) jointly purchased J. Makowski Company, one of the first independent power producers when power generation was deregulated in the US.
  • In 1997, Shell Generating Ltd. acquired PG&E’s stake in InterGen. The partnership between Shell and Bechtel enabled InterGen to become one of the world’s fastest-growing developers of greenfield energy projects.
  • In 1998, under Carlos Riva’s leadership as InterGen’s first president and CEO, the first InterGen power plant was built in Runcorn, England.
  • InterGen has developed, financed, constructed, and operated a portfolio of more than 20 power plants, pipelines, compression stations and other energy-related infrastructure assets in more than 15 countries and six continents with a combined generating capacity of greater than 18 gigawatts.
  • In 2005, InterGen was sold to Ontario Teachers’ Pension Plan and AIG Highstar.
  • GMR acquired AIG Highstar's 50 percent stake in InterGen in 2009.
  • In 2011, China Huaneng Group and Guandong Yudean Group purchased GMR's 50 percent stake in InterGen.
  • InterGen closed a $1.8 billion refinancing of its corporate debt facilities in 2013.
  • In 2015, InterGen embarked on its first renewable energy project through an investment with IEnova in the Energía Sierra Juárez wind farm in Tecate, Baja California, Mexico; the first cross-border renewable energy facility between Mexico and the US.
  • On August 3, 2015, InterGen's San Luis de la Paz power plant began commercial operations near the municipality of San Luis de la Paz, Guanajuato, Mexico. The 205 megawatt (MW) combined-cycle natural gas power project was built adjacent to InterGen's Bajio power plant.
  • In February 2018, InterGen closed on the financing for its new Welland Power Station in Spalding, Lincolnshire (UK), a 300-megawatt open-cycle gas turbine project.