The scope of the Northeast Tennessee (NET) project, which has an estimated capital cost of $135m, includes expanding or modifying existing facilities on the ETNG system and building a new, 8.5-mile mainline extension that would generally follow TVA’s existing transmission line corridor.

The company said that the use of existing utility corridors and pipeline rights-of-way, where possible, will minimize the effects on landowners and the environment.

ETNG’s pipeline system expansion, which is expected to be in service during the second half of 2011, is subject to Spectra Energy and Spectra Energy Partners board of directors approvals and regulatory approvals.

Gregory Rizzo, president and CEO of Spectra Energy Partners, said: “Our East Tennessee Natural Gas system in northeastern Tennessee and southwestern Virginia is well positioned to safely and reliably deliver clean-burning natural gas to TVA’s proposed natural gas-fired power plant.”