The Spokane and Inland Empire Railroad Company later merged into a United States-based company formed from a merger of four what?
Spokane and Inland Empire Railroad: The Spokane and Inland Empire Railroad Company (S.&I.E.R.R.Co.) Spokane and Inland Empire Railroad:  It merged into the Great Northern Railway and later, the Burlington Northern Railroad, which operated some roads into the 1980s. Burlington Northern Railroad: The Burlington Northern Railroad (reporting mark BN) was a United States-based railroad company formed from a merger of four major U.S. railroads.
major U.S. railroads