ETT seeks approval in Texas for 345-kV line in Knox County, Texas

Electric Transmission Texas (ETT) on Jan. 7 filed with the Public Utility Commission of Texas an application to amend its certificates of convenience and necessity for the proposed Coulomb to Vera Wind 345-kV Transmission Line in Knox County, Texas.

As noted in the filing, ETT is proposing to design and build the line to interconnect a new wind generation facility. Further discussing the need for the proposed project, ETT said that the proposed line would connect a new transmission service customer, El Campo Wind, LLC, which has requested ETT to interconnect at its to-be-built Vera Wind substation at 345 kV to provide interconnection service to its planned 242.8-MW plant capacity comprised of 17 units at 2 MW each; 48 units at 4.2 MW each; and two units at 3.6 MW each.

The proposed line would be built as a single-circuit, 345-kV line, except for an approximate 0.7-mile section west out of the Coulomb switch station, which would be built double-circuit-capable, ETT said, adding that the project would be built using primarily steel, single-pole structures. The line would extend from the ETT Coulomb 345-kV switch station to the wind farm’s Vera Wind substation.

ETT also said that it would own the new Coulomb 345-kV switch station, while the new Vera Wind substation would be owned by El Campo Wind and would be the other terminus for the project.

ETT said that the proposed line would be about 3.8 miles long and would require a nominal 150-foot-wide right of way (ROW). None of the ROW has been acquired on private property at this time, but ETT has acquired written consent from all impacted landowners crossed by the consensus route presented for the project, ETT said.

The consensus route for the project is not located within the incorporated boundaries of any municipality, ETT said. In addition, no habitable structure is located within 500 feet of the consensus route.

While the typical structure for the project would be about 125 feet to 175 feet in height, the height may vary depending on the clearance requirements at a particular location due to the terrain, span lengths, and overhead obstructions.

ETT added that the specific area of the project is used for farming and some ranching. The area traversed by the line is located in the North-Central Plains Physiographic Province of Texas, which geographically is on the boundary of the Southwestern Tablelands and Central Great Plains, just east of the base of the Panhandle, ETT said. The study area is located in the northern portion of Knox County, about 9.5 miles northeast from the center of the City of Benjamin, which is the county seat, ETT said.

Among other things, ETT noted that no park or recreational area is crossed by the consensus route centerline and there is no National Register of Historical Places-listed or determined-eligible site crossed by, or within 1,000 feet of, the consensus route centerline.

ETT noted that the estimated total cost of the transmission facilities portion of the project would be about $10.7m, and that the estimated total cost of the substation facilities portion of the project would be about $14m.

According to the estimated schedule, material and equipment procurement would be completed in February; ROW and land acquisition would be completed in May; engineering and design would be completed in July; and construction of facilities would begin in August and be completed in March 2020, which is also when the facilities would be energized.

About Corina Rivera-Linares 2807 Articles
Corina Rivera-Linares, chief editor for TransmissionHub, has covered the U.S. power industry for the past 13 years. Before joining TransmissionHub, Corina covered renewable energy and environmental issues, as well as transmission, generation, regulation, legislation and ISO/RTO matters at SNL Financial. She has also covered such topics as health, politics and education for weekly newspapers and national magazines. She can be reached at corinar@pennwell.com.