Entergy’s (NYSE:ETR) Entergy Louisiana said recently that on March 16, it put into service a major element of a multi-million dollar program to enhance service reliability to Plaquemines Parish customers and meet the needs of a growing economy – that is, a new $60m, 10.5-mile, 230-kV transmission line between the Oakville substation, off Walker Road in Belle Chasse, and the Alliance substation, west of Louisiana Highway 23 near the Phillips 66 refinery.
The company said that the new line will increase service reliability to residential and industrial customers by providing an additional source to the existing transmission system.
A company spokesperson on April 13 told TransmissionHub that the name of that line is the Oakville-Alliance 230-kV Transmission Line.
Entergy said that the last phase of the project will be to build about seven miles of new 34-kV distribution line on the lower portion of the new steel transmission structures, which are built to withstand winds of up to 150 mph, along Highway 23. All customers currently served by the existing distribution line on older wooden poles along that section of Highway 23 will be served by the new distribution line, the company said. Entergy Louisiana expects to complete work on the distribution lines over the next eight to 10 months.
The spokesperson noted that the distribution line, which does not have a specific name, is an existing 34.5-kV distribution feeder along Highway 23.
“The ‘new’ refers to us building a new section of feeder on our steel transmission structures, to replace the older feeder that is currently supported on wood poles,” she said.
Construction of the new distribution feeder will begin in May, and should be completed in July, the spokesperson said, adding, “However, this does not include the subsequent relocation of all customers along that 7-mile stretch from the old feeder to the new feeder, which is expected to be completed by the end of 2018.”
The company noted in its March 22 statement that the overall program involved a series of projects to build a 230-kV transmission path between the Peters Road substation in Jefferson Parish and the Alliance substation in Plaquemines Parish. Two of the projects – expanding the Peters Road substation to supply the new 230-kV line, and rebuilding/expanding the Oakville substation and building a new 6.5-mile, 230-kV transmission line between the Peters Road and Oakville substations – were completed in 2012, the company said.
This latest project also included improvements to the Alliance and the Oakville substations, which were completed in 2014, the company said.
The spokesperson noted that the overall program is called the South East Louisiana Improvements, or SELA, project.