Troy & Greenfield Railroad

Reporting mark: T&G
ST - CR111 Overpass (Rensselaer County, New York)
Pony plate girder bridge over CR 111 on Springfield Terminal Railway
Open to traffic

ST - Hoosac Tunnel (Berkshire County, Massachusetts)
Longest tunnel built at its time, 194 killed during construction, most important piece of railroad history.
Tunnel under Hoosac Mountains on Pan Am Railways
Open with daily traffic