Liberty Gas Storage is a partnership of Sempra Pipelines & Storage, a Sempra Energy company, and ProLiance Energy. Proliance, a leading energy marketer and services company serving Midwest and Southeast markets, has a 25 percent ownership in the project. The Sempra Energy subsidiary has 75 percent ownership, as well as responsibility for the development and operation of the facility.

Sempra Pipelines & Storage Corp. develops, builds and operates natural gas pipelines and storage facilities in Latin America and the United States. The company and its affiliates operate and/or own more than 1,200 miles of pipeline and are in the process of developing another 800 miles to help meet North America's growing demand for energy.

Sempra Energy (NYSE: SRE) is a Fortune 500 energy company whose companies develop energy infrastructure, operate utilities and provide related products and services.  Sempra Energy’s 13,500 employees serve more than 29 million consumers around the world.