Electric Transmission Texas LLC (ETT) completed construction of a new 138-kilovolt (kV) transmission line from Uvalde to Castroville on December 31, 2012. The approximately 80 mile portion of the line was jointly built by ETT and City Public Service Energy (CPS Energy). CPS Energy constructed and own a 4.5-mile portion of the line within its retail electric service area in the Castroville 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. The purpose of the transmission line upgrade was to improve reliability by relieving potential for overload and under-voltage problems of the existing transmission system in the area. The project also would increase the power transfer capability in the region.
"The demand for electricity in the region west-southwest of San Antonio is growing rapidly," said Calvin Crowder, president of ETT. "This demand for energy will soon exceed the design of the existing electric transmission system. The new line is an important step toward maintaining reliable electric service and in reducing the potential for a loss of electric service."
The final approved route is featured in the separate PDF file below.