In mid 1909, the Central Colorado Power Co. began delivering power over the Shoshone Transmission Line from Glenwood Springs to Denver. This three-phase 90 kV line was split into two parallel lines as much as a mile apart for the 3-mile segment that crossed Argentine Pass from below Waldorf on the east to Argentine on the west (both are ghost towns today). As currently routed, this line crosses the continental divide 1.25 miles (2.02 km) south of Argentine Pass, just south of Argentine Peak.