Electric Transmission Texas LLC (ETT) completed construction of a new 138-kilovolt (kV) transmission line from American Electric Power Texas Central Company’s (TCC) Lytle Substation to City Public Service Energy’s (CPS Energy) Lytle Substation on December 31, 2012. ETT will own and operate approximately 1.5 miles of the line and CPS Energy will own and operate the remainder of the line within its certificated area
This project was recommended by the board of directors of the Electric Reliability Council of Texas (ERCOT), the independent system operator for most of Texas. ERCOT determined that the current transmission system supporting the TCC Western Region, including load and transmission facilities for Medina Electric Cooperative (MEC), is not sufficient to meet the reliability needs of the area. The purpose of the transmission line will increase the power transfer capability from generation located south and east of San Antonio to the moderate and high load growth within TCC Western Region. In addition, the improvement will relieve overloading and under-voltage conditions that exist on the transmission system.
The final approved route is featured in the separate PDF file below.