Aspen evaluated potential impacts associated with the construction and operation of a new substation, modifications to an existing substation, 7.3 miles of new 230 kV transmission line, new 115 kV connections, and distribution line upgrades. Aspen provided detailed analyses for five alternative routes for the 230 kV transmission line, two alternative substation sites, and two alternatives to the 115 kV upgrade, as well as the No Project Alternative. The CPUC certified the EIR in May 2001. Construction began in May 2002 and was completed in September 2003. Aspen provided mitigation monitoring.