Termoelectrica de Mexicali

Sempra Energy Resources has built a $350 million, 600MW power plant near Mexicali, Baja California, Mexico. Sempra is the independent power generation subsidiary of Sempra Energy, parent company of San Diego Gas and Electric Company.

The new Termoeléctrica de Mexicali is a combined-cycle gas turbine (CCGT) power station. It has two gas turbines, a steam turbine and a heat recovery steam generator (HRSG). The plant is connected to the US electric grid via a new, 230kV transmission line. The power plant was completed in July 2003.

The plant was built ten miles west of Mexicali, three miles from the border, and is believed to be the first in Mexico to be fully owned and operated by a foreign corporation. Previously, facilities built and operated by private firms were owned by the Mexican government’s Federal Electricity Commission.


The lead contract was awarded in June 2001, and the plant started operation in July 2003. Termoelectrica de Mexicali has two General Electric 7FA combustion turbines in combined cycle.

Electricity from the power plant may also help to alleviate California’s energy crisis. This power plant is aimed to help ensure that the border region has adequate infrastructure to meet its future energy needs. Sempra decided to build the plant near Mexicali because of its proximity to a source of natural gas, the North Baja Pipeline (which began construction in July 2001), and to the Southwest Powerlink (a high-voltage transmission line connecting California and Arizona).

Sempra also speeded up construction of a natural gas pipeline from Arizona into Baja California. Originally scheduled to begin operation in early 2003, the $230 million pipeline opened in 2002. This was essential for the combined cycle gas turbine (CCGT) plant to work.

Efforts to win Mexican permits needed for the plant and pipeline moved relatively quickly.


Environmental group Greenpeace has claimed that Sempra Energy Corp. is changing the border region into a “dirty energy export zone.” California has strict air and water standards, and Greenpeace accuses the company of building in Mexico to avoid these laws. Greenpeace accused Sempra of unethical practices like high pricing and pollution, and also condemned President Bush in the US and Vicente Fox in Mexico for accelerating the border region’s development.

Local concerns of water usage and river pollution were allegedly ignored by US and Mexican governments. Greenpeace points out that energy efficiency and generation from renewables would make the plant unnecessary.


The plant and pipeline could eventually help relieve California’s energy crisis. In hopes of boosting California’s energy supply, Governor Gray Davis ordered the state to speed up the issuing of permits needed for power plant construction. Since one of the reasons cited for Sempra building the power plant in Mexico is the easier licensing process, changes to the Californian rules should increase the state’s supply.

Sempra Energy, based in San Diego, is the parent company of San Diego Gas & Electric, a utility that supplies electricity to 1.2 million customers in San Diego and Orange counties.

The turnkey contract for the power plant was awarded to ICA Fluor Daniel. This is a consortium of Fluor Daniel and ICA Empresas. The contract value was announced as $158.5 million. The power plant has two gas turbines with heat recovery systems. ICA Fluor Daniel’s scope included a 12km pipeline for water supply and a treatment system for gray water coming from Mexicali City. Sterling Energy supplied a business, operating and maintenance team made up mainly of Mexican citizens.