Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Outside of station with workers using NP crane to hoist crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, station, railroad employee, crane

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Outside of station with workers hoisting crate with Centralized Traffic Control equipment to platform roof. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, station, railroad employee

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Worker on platform roof readies new Centralized Traffic Control equipment for movement into dispatchers office. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, railroad employee, station

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Workers on platform roof moving new Centralized Traffic Control panel through window into dispatchers office. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, station, railroad employees

Northern Pacific signal equipment, Union Station, Tacoma, Washington, December 11, 1967. Workers installing new Centralized Traffic Control panel in dispatchers office. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, railroad employee, dispatchers office

Northern Pacific signal bridge at Martin, Washington, circa 1960. Signal bridge with three signal masts, mainline, east portal of Stampede Tunnel in snow. Photo by J.M. Fredrickson . Other Subject Classes: signal equipment, track, tunnel, mountains

Northern Pacific shops at South Tacoma Washington, in 1891. New repair shop building with wheel parts. J.M. Fredrickson collection. Other Subject Classes: repair shop, railroad equipment

Northern Pacific shops at South Tacoma Washington, in 1891. New shops buildings, yard, mainline. J.M. Fredrickson collection. Other Subject Classes: repair shop, railroad yard, track

Northern Pacific shops at South Tacoma, Washington, in 1891. Exterior of new repair building, yard, wheels in storage. J.M. Fredrickson collection. Other Subject Classes: repair shop, railroad yard, railroad equipment

Northern Pacific shops at South Tacoma, Washington, circa 1942. Distant view of complex looking east from hill. Photo by J.M. Fredrickson. Other Subject Classes: repair shop