Analysis of information sources in references of the Wikipedia article "Copper Line (San Diego Trolley)" in English language version.
JULY 26, 1995 – EL CAJON TRANSIT – Fourth East (Orange) Line segment opens between El Cajon Transit Center and Santee Town Center.
1997 – BLUE LINE EXTENDS [...] MTDB renames South Line to Blue Line and East Line to Orange Line along with adding identification numbers for each Trolley Station.
The Orange Line will also be extended in El Cajon to Arnele Avenue Station.