Sharyland Utilities seeks approval of 345-kV line needed to interconnect 300-MW solar project

Sharyland Utilities, L.P., on Nov. 28 filed with the Public Utility Commission of Texas an application to amend its certificate of convenience and necessity for the proposed Clearfork to Dog House 345-kV Transmission Line in Andrews County, Texas.

As noted in the filing, Sharyland would build the project to connect its existing Clearfork switchyard, located in Andrews County, to Sharyland’s proposed Dog House switchyard, located in Andrews County, in order to serve a new transmission service customer, Prospero Energy, LLC, which will interconnect its 300-MW solar project to the Dog House switchyard.

The Clearfork switchyard is located about two miles west-southwest of the intersection of Kermit Highway 115 and Farm-to-Market (FM) Road 181 in Andrews County, while the Dog House switchyard would be located about six miles southwest of the intersection of FM 181 and Eunice Highway 87 in Andrews County. The study area is a rural setting, predominantly comprised of rangeland/pastureland with scattered oil and gas infrastructure located throughout the region, Sharyland added, noting that no habitable structures are identified within the study area.

The transmission project would be designed at 362 kV and operated as a 345-kV transmission line, Sharyland said, adding that the line would be about 10.3 miles long. The project also includes a modification to the Clearfork switchyard to add a new 345-kV position.

Sharyland also said that the Dog House switchyard would consist of a single breaker, metering, and other ancillary equipment, and it would provide Prospero with one interconnection point. Sharyland would build, own, and operate the transmission line and the Dog House switchyard. Sharyland added that Prospero would be responsible for the construction and ownership of the interconnecting 34.5/345-kV autotransformer, collection station, gathering system, and the line connecting its collection station to the dead-end structure located at the Dog House switchyard.

Sharyland added that it proposes to build the project along right of way (ROW) that is agreed upon by the only two landowners directly affected by the project, and that Prospero is acquiring such ROW on behalf of Sharyland. Prospero is obtaining the landowner easements necessary to build the line, which Prospero would transfer to Sharyland upon approval of the application. In addition, the University of Texas – one of the landowners – has agreed to lease to Sharyland the property on which Sharyland would build the Dog House switchyard.

While the estimated maximum structure height would be about 150 feet, the final actual aboveground structure height may vary depending on terrain.

Sharyland also noted that the proposed route of the project would have an estimated total cost of about $21.3m – that is, about $14.3m for the transmission line portion of the project, about $5.7m for the Dog House switchyard portion, and about $1.3m for the Clearfork switchyard portion.

According to the estimated schedule, ROW and land acquisition would begin and be completed in February 2019; engineering and design would begin in February 2019 and be completed in June 2019; material and equipment procurement would begin in March 2019 and be completed in September 2020; construction of facilities would begin in April 2019 and be completed in March 2020; and the facilities would be energized in April 2020.

About Corina Rivera-Linares 3067 Articles
Corina Rivera-Linares, chief editor for TransmissionHub, has covered the U.S. power industry for the past 15 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 clinares@endeavorb2b.com.