The Newhart-Castro 115 kilovolt (kV) transmission line will maintain electric reliability in Castro, Parmer, Swisher, Bailey, Lamb and Hale counties as customer load growth and new generation resources are added to the transmission grid. The project consists of about 24 miles of new 115 kV transmission line connecting the Newhart Substation, located about five miles northeast of Hart, Texas, at the northeast intersection of County Roads 620 and 527, to the existing Castro Substation which is located about five miles southwest of Dimmitt, Texas, northeast of the intersection of County Roads 507 and 617. A Certificate of Convenience and Necessity application was filed with the Public Utility Commission of Texas (PUCT) on November 9, 2011 and approved by the PUCT in January 2012. The project was placed in service January 10, 2014.
The 115 kV line is constructed of steel structures. The structures, which are between 70 and 140 feet tall, are spaced 500 and 800 feet apart.