Sharyland Utilities, Public Utility Commission of Texas staff, and Oncor Electric Delivery Company, in a Jan. 31 joint proposed notice of approval, called for the approval of Sharyland’s proposed Clearfork to Dog House 345-kV Transmission Line in Andrews County, Texas, using the project’s proposed route.
As noted in the filing, Sharyland in November 2018 filed an application with the commission to amend its certificate of convenience and necessity to build the new, single-circuit, 345-kV line; Sharyland proposed a single route, which would be about 10.3 miles long. Oncor was the only party to intervene.
There are no habitable structures located within 500 feet of the centerline of the proposed route. The filing also noted that the project would have minimal impact on recreational and park areas, with no parks or recreational areas owned by a government body or an organized group, club, agency, or church identified as being located within 1,000 feet of the centerline of the proposed route.
In addition, no adverse effects to archaeological or historical areas are anticipated as a result of building the project. The filing further noted that the project would not adversely affect the area’s environmental integrity.
Sharyland would 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 typical structure for the line would be between 130 feet and 150 feet in height and would require a 175-ft, right of way (ROW).
The filing added that 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 also noted 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 project’s estimated construction costs, including changes described in an 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 added.
Among other things, the filing noted that the commission limits the granted authority to a period of seven years from the date the notice is signed, unless the line is commercially energized before that time. Also, the filing said that Sharyland must cooperate with directly affected landowners to implement minor deviations in the approved route to minimize the impact of the line. The filing added that Sharyland must update the reporting of the transmission facilities on its monthly construction progress report before the start of construction to reflect the final estimated cost and schedule.