Enterprise also announced that the expansion of its recently acquired State Line natural gas gathering system serving producers in the Haynesville Shale area of Northwest Louisiana is scheduled to be completed during June 2010.

The Haynesville Extension is an expansion of the Acadian Gas intrastate natural gas pipeline system that provides producers developing the Haynesville Shale in Northwest Louisiana with access to 150 end-use customers, including industrial and municipal consumers, on the Acadian system and markets across the eastern US through interconnects with 12 interstate pipelines, including the Florida Gas Transmission and Southern Natural Gas systems.

Construction of the 270-mile Haynesville Extension is expected to be completed in the third quarter of 2011.

The expansion of the State Line system, which Enterprise acquired from M2 Midstream, will increase the capacity from approximately 400MMcf/d to 700MMcf/d. The State Line infrastructure includes the Battlefield treating facility in southern DeSoto Parish, Louisiana that has the capacity to treat up to 180MMcf/d of natural gas.

As part of the expansion initiative, a new pipeline is being constructed that will have the capacity to deliver up to 250MMcf/d of natural gas from the Battlefield treating facility to the 42-inch diameter Gulf South Pipeline at the Kingston Station in DeSoto Parish.