Transco Seeks Approval For Leidy Southeast Expansion

November 2013, Vol. 240 No. 11

Williams Partners’ Transco natural gas pipeline has filed an application with the FERC to expand its existing Leidy Line in northern Pennsylvania and its mainline from New Jersey through Alabama by 525,000 Dth/d of natural gas to serve growing natural gas markets along the system.

The project is fully subscribed by shippers with long-term contracts.

This application is made as another major expansion project on the Leidy Line nears completion. The Northeast Supply Link project expands Transco’s existing system connecting the Marcellus Shale production region to the New York market by 250,000 Dth/d. Williams placed a portion of the project’s capacity (125,000 Dth/d) into service in August and the remaining portion of the $390 million expansion is to be placed into service this month.

Once the expansion is complete in late 2015, the Leidy Southeast project will provide enough natural gas to serve the equivalent of 2 million households.

The expansion will primarily consist of 30 miles of pipe and horsepower addition at existing compressor stations in Pennsylvania and New Jersey, in addition to existing facility modifications along its mainline. The cost of the project is estimated at $610 million. If approved, compressor station construction would begin in fall 2014 with pipeline construction following in spring 2015.