Burlington Northern signal bridge at Pasco, Washington, on June 26, 1986.This former Northern Pacific structure is in their 2nd subdivision of the Idaho division. Photo by GJ WerkemaOther subject classes: signal, Signal Bridge.

Burlington Northern signal bridge at Pasco, Washington, on June 26, 1986.This former Northern Pacific structure is in their 2nd subdivision of the Idaho division. Photo by GJ Werkema Other subject classes: signal, Signal Bridge.

Burlington Northern signal bridge at Pasco, Washington, on June 26, 1986.This former Northern Pacific structure is in their 2nd subdivision of the Idaho division. Photo by GJ Werkema. Other subject classes: signal, Signal Bridge.

Burlington Northern signal bridge at Pasco, Washington, on June 26, 1986.This former Northern Pacific structure is in their 2nd subdivision of the Idaho division. Photo by GJ WerkemaOther subject classes: signal, Signal Bridge.