Southern Transmission System Project



Participants:
Anaheim (18%), Burbank (5%), Glendale (2%), Los Angeles (60%), Pasadena (6%), Riverside (10%)

About the Southern Transmission System
The Southern Transmission System Project (STS) is a 488 mile, 500kV DC bi-pole transmission line operated with near-perfect availability (97.2%). The STS project commenced commercial operations in July 1986. Construction to upgrade two AC/DC converter stations and increase their combined rating from 1,920 MW to 2,400 MW was completed in May 2011.