Burlington Northern interlocking tower at Tacoma, Washington, in July 1973. Interior of Reservation tower with switch levers, signal equipment. Photo by Tim J. Fredrickson, J.M. Fredrickson collection. Other Subject Classes: interlocking tower, signal equipment

Burlington Northern interlocking tower at Tacoma, Washington, in July 1973. Interior of Reservation tower with operator T. J. Fredrickson, switch levers, signal equipment. Photo by Tim J. Fredrickson, J.M. Fredrickson collection. Other Subject Classes: interlocking tower, railroad employee, signal equipment

Burlington Northern interlocking tower at Tacoma, Washington, in July 1973. Interior of Reservation tower with operator T. J. Fredrickson, switch levers, signal equipment. Photo by Tim J. Fredrickson, J.M. Fredrickson collection. Other Subject Classes: interlocking tower, railroad employee, signal equipment

Burlington Northern interlocking tower at Tacoma, Washington, in July 1973. Interior of Reservation tower with switch levers, signal equipment. Photo by Tim J. Fredrickson, J.M. Fredrickson collection. Other Subject Classes: interlocking tower, signal equipment

Burlington Northern Half Moon yard at Tacoma, Washington, on May 15, 1975. Looking north at railroad yard, mainline, block signal, road bridge, warehouses on waterfront. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, signal, warehouse

Burlington Northern Half Moon yard at Tacoma, Washington, in July 1975. Looking down at railroad yard with heavy concentration of grain and box cars, mainline, road bridge, warehouses and grain elevator on waterfront. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, freight car, grain elevator, warehouse

Burlington Northern Half Moon yard at Tacoma, Washington, in July 1975. Looking down at railroad yard with heavy concentration of grain and box cars, mainline, road bridge, warehouses and grain elevator on waterfront. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, freight car, grain elevator, warehouse

Burlington Northern Half Moon yard at Tacoma, Washington, on July 30, 1975. Looking north at railroad yard, mainline, southbound freight going away, road bridge, warehouses on waterfront. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, signal, freight train, caboose, warehouse

Burlington Northern Half Moon yard at Tacoma, Washington, in July 1975. Looking down at railroad yard with heavy concentration of grain and box cars, mainline, road bridge, warehouses and grain elevator on waterfront. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, freight car, grain elevator, warehouse

Burlington Northern Half Moon yard at Tacoma, Washington, in July 1975. Looking north at railroad yard with heavy concentration of grain and box cars, mainline, road bridge, warehouses and grain elevator on waterfront. Photo by J.M. Fredrickson. Other Subject Classes: railroad yard, track, freight car, grain elevator, warehouse