The company said the expansion of its Transco interstate pipeline will provide natural gas transportation capacity to markets in the southeastern US by the end of 2014.

Customers can submit long-term shipper volume commitments until 23 August 2012,

Williams’ natural gas pipeline business president Randy Barnard said, "Mobile Bay South III is an extremely efficient way to move additional supply from Station 85 and a number of regional storage facilities to growing southeastern markets."

The expansion project would transport about 325,000 dekatherms of natural gas per day on the Transco Mobile Bay Lateral in Choctaw County to points along the lateral as far south as the interconnection with Bay Gas Storage in Mobile County.

Subject to the receipt of contractual commitments from shippers, the company plans to proceed with determining the final capacity, scope and cost of the project.

The proposed project will be subject to approval by the Federal Energy Regulatory Commission and other agencies.

Williams owns about 68% of Williams Partners, including the general-partner interest.