Kinder Morgan Energy Partners LP and Sempra Pipelines & Storage, a unit of Sempra Energy announced that EnCana Marketing, a subsidiary of EnCana Corporation US, has signed a binding precedent agreement for 500 million cubic feet per day of natural gas capacity on the proposed Rockies Express Pipeline. The agreement was signed in conjunction with an open season currently under way on the Rockies Express project.

The approximately 1,350 mile, 42 inch diameter, 2 billion cubic feet per day Rockies Express Pipeline will be the largest pipeline built in the United States in more than 20 years. The planned route of the pipeline originates at the Cheyenne Hub in Weld County, Colo., and extends to the Clarington Hub in eastern Ohio.

Kinder Morgan Energy Partners, L.P. is one of the largest publicly traded pipeline limited partnerships in America. KMP owns or operates more than 25,000 miles of pipelines and approximately 145 terminals.

Sempra Pipelines & Storage acquires, builds and operates natural gas pipelines and storage facilities in Mexico and the United States.