The Tuco-Yoakum-Hobbs 345 kV transmission line project consists of approximately 168 miles of new 345 kV transmission line in Texas and New Mexico. The final route will be selected by the Texas Public Utility Commission and the New Mexico Public Regulation Commission. Approximately 105 miles of 345 kV transmission line will be constructed between the Tuco substation which is located approximately two miles north of Abernathy in Hale County, Texas to the Yoakum substation located about 30 miles from Brownfield, Texas. Twenty-seven miles of 345 kV line will be constructed between the Yoakum substation and the Texas state line. Thirty-six miles of 345 kV line will be constructed between the state line and the Hobbs Plant substation which is located about 11 miles northwest of Hobbs, New Mexico.
The existing Hobbs and Yoakum substations will be upgraded to be 345 kV capable.
These projects will provide a significant source of bulk power capacity from the transmission hub at Tuco substation to the southwest portion of the transmission system in west Texas and eastern New Mexico.
The Texas Public Utility Commission and the New Mexico Public Regulation Commission must grant a Certificate of Convenience and Necessity (CCN) for the portion of the Tuco-Yoakum-Hobbs line in the respective state before construction. The CCN process determines the project need and impact as well as the line characteristics, such as substations and endpoints, and the line route. This project will be split into two CCNs in Texas (TUCO to Yoakum and Yoakum to State Line) and one CCN in New Mexico (State Line to Hobbs). The first CCN, Yoakum to State Line (Docket No. 44726), was filed with the Texas Public Utility Commission on June 25, 2015. The CCN was approved by the Commission on March 3. The Tuco to Yoakum CCN (Docket No. 46042) was filed on June 29, 2016. The CCN was approved on September 21, 2017. The New Mexico State Line to Hobbs CCN (Case No. 17-00143-UT) was filed with the New Mexico Commission on June 21, 2017.
The Tuco-Yoakum-Hobbs 345 kV transmission line is expected to be in-service in 2020. The estimated cost of the project is $242 million.