A southern extension was completed in 1905 through Northern Maine Junction to Searsport on Penobscot Bay.
Baltimore and Ohio Railroad | Pennsylvania Railroad | Union Pacific Railroad | Bangor | Underground Railroad | New York Central Railroad | Bangor, Maine | Bangor, Gwynedd | Alaska Railroad | Erie Railroad | Central Pacific Railroad | Illinois Central Railroad | First Transcontinental Railroad | Lehigh Valley Railroad | Lehigh and Susquehanna Railroad | Grand Funk Railroad | Bangor University | Chicago, Milwaukee, St. Paul and Pacific Railroad | Bangor International Airport | Bangor, County Down | Wabash Railroad | Railroad switch | Missouri Pacific Railroad | Boston and Albany Railroad | Bangor Cathedral | New York, New Haven and Hartford Railroad | Metro-North Railroad | Grand Rapids and Indiana Railroad | Atlantic Coast Line Railroad | Albany and Susquehanna Railroad |
Owning this section gave JDI access to interchange points with Canadian National Railway (CN) at Saint John, New Brunswick, Guilford Rail System at Mattawamkeag, Maine, and Bangor & Aroostook Railroad (BAR) at Brownville Junction, ME.
He also served as an executive with the American Woolen Company, Lehigh Coal and Navigation Company, Waltham Watch Company, Fanny Farmer, Boston Edison Company, Bangor and Aroostook Railroad, Pittsburg and Shawmut Railroad, Boston and Maine Railroad, Boston Garden-Arena Corporation, and Springfield and Eastern Street Railway.
Iron Road ceased operations in late 2002 and NVR was merged along with Canadian American Railroad, Bangor and Aroostook Railroad and Quebec Southern Railway to form Montreal, Maine and Atlantic Railway, now also bankrupt.