Clinic Title: GN's Cascade Tunnels
Clinician: Rick Abramson
Clinic Time: 2022-09-17 13:00
Clinic Type: Prototype
Clinic Category: 06 - Prototype Models

This clinic shows how the Great Northern initially crossed over the top of the Cascade Mountains. Difficult operating conditions led to the construction of the first tunnel in 1900 which utilized 3-phase electrification.  In 1929 the second and current tunnel was built, 7.9 miles long and utilizing 11,000 volts AC electrification.  The clinic discusses the different electric engines employed in both tunnels.