The Public Utility Commission of Texas amends Sharyland Utilities’ certificate of convenience and necessity (CCN) to build and operate the Clearfork to Dog House 345-kV transmission line in Andrews County, Texas, using the proposed route, according to a Feb. 6 notice of approval signed by an administrative law judge.
As noted in the filing, Sharyland last November filed an application to amend its CCN to build a new, single-circuit, 345-kV transmission line to extend from Sharyland’s existing Clearfork switchyard to the Dog House transmission line.
Sharyland proposed a single route, which will be about 10.3 miles long and built primarily on monopole structures.
The filing also noted that Sharyland on Jan. 19 filed an amendment to the application proposing the installation of a single-circuit, bundled 959.6 kcmil ACSS/TW “Suwanee” conductor, instead of the initially proposed 1272 kcmil ACSR/TW “Pheasant” conductor and building the line on double-circuit-capable monopole structures, instead of the initially proposed single-circuit monopole structures.
Sharyland will build the line using self-supporting, double-circuit-capable, single steel poles – monopoles – from the Clearfork switchyard, located about two miles west-southwest of the intersection of Kermit Highway 115 and Farm-to-Market (FM) Road 181 in Andrews County, to the proposed Dog House switchyard, to be located about six miles southwest of the intersection of FM 181 and Eunice Highway 87 in Andrews County.
The filing added that the typical structure for the line will be between 130 feet and 150 feet in height and will require a 175-foot right of way (ROW).
The estimated construction costs of the project, including changes described in the amendment to the application, total about $16.5m, excluding costs of about $1.3m associated with the Clearfork switchyard and about $5.7m associated with the proposed Dog House switchyard, the filing noted.
As TransmissionHub reported, Sharyland, commission staff, and Oncor Electric Delivery Company, in a Jan. 31 joint proposed notice of approval, called for the approval of the line in Andrews County, using the project’s proposed route.
As noted in the Feb. 6 filing, the line is necessary to implement the request of Prospero Energy, LLC for direct interconnection of its 300-MW solar project to Sharyland’s 345-kV transmission system. Prospero plans to build its solar project collection station in the near vicinity of the proposed Dog House switchyard. The filing added that Sharyland and Prospero in April 2018 executed the ERCOT Standard Generation Interconnection Agreement to provide transmission service associated with Prospero’s solar project.
Prospero requested interconnection at the proposed Dog House switchyard, and the Clearfork switchyard is the nearest existing point of interconnection to the proposed Dog House switchyard that is suitable for Prospero’s requested voltage, the filing said.
“Sharyland demonstrated a reasonable need for the transmission line,” the filing said. “The need for the project is not disputed by the parties to this proceeding.”
There are no habitable structures located within 500 feet of the centerline of the proposed route, and no parks or recreational areas owned by a government body or an organized group, club, agency, or church were identified as being located within 1,000 feet of the centerline of the proposed route. The project will have minimal impact on recreational and park areas, the filing added.
In addition, the project is not anticipated to have significant impacts to existing land uses or the geological, hydrological, or wetland resources of the area, the filing said.
Under conditional approval, the filing noted that seven years is a reasonable and appropriate limit to place on the authority granted in the notice to build the project.
Among other things, the filing said that if Sharyland or its contractors encounter any archaeological artifacts or other cultural resources during construction of the transmission facilities, work must cease immediately in the vicinity of the artifact or resource, and Sharyland must report the discovery to the Texas Historical Commission (THC), as well as take action as directed by the THC.