Question: The first railway in British North America, the Champlain and St. Lawrence Railroad, was built when to track gauge, However the promoters of St. Lawrence and Atlantic Railroad, (intended to connect Montreal to the ice-free port at Portland, Maine) decided to use , setting a precedent for the colony for several decades, The St. Lawrence and Atlantic Railroad (reporting mark SLR) , known as St-Laurent et Atlantique Quebec (reporting mark SLQ) in Canada, is a short line railway operating between Portland, Maine, on the Atlantic Ocean and Montreal, Quebec, on the St. Lawrence River?

<P0-S0> The first railway in British North America, the Champlain and St. Lawrence Railroad, was built in the mid-1830s to track gauge. <P0-S1>  This was followed by the Albion Colliery tramway in and the Montreal and Lachine Railroad in . <P0-S2>  However the promoters of St. Lawrence and Atlantic Railroad, (intended to connect Montreal to the ice-free port at Portland, Maine) decided to use , setting a precedent for the colony for several decades. <P0-S3>  The first section from Longueuil to St. Hyacinthe opened in 1847 and at the end of that year there were 30 mi of broad gauge and 22 mi of standard gauge in Canada. <SEP> <P1-S0> The St. Lawrence and Atlantic Railroad (reporting mark SLR) , known as St-Laurent et Atlantique Quebec (reporting mark SLQ) in Canada, is a short line railway operating between Portland, Maine, on the Atlantic Ocean and Montreal, Quebec, on the St. Lawrence River. <P1-S1>  It crosses the Canada–US border at Norton, Vermont, and is owned by short line operator Genesee and Wyoming. <SEP> <P2-S0> The Quebec Central Railway (reporting mark QCR) was a railway in the Canadian province of Quebec, that served the area of Quebec called the Eastern Townships, south of the St. Lawrence River. <P2-S1>  Its headquarters was in Sherbrooke. <P2-S2>  It was originally incorporated in 1869 as the Sherbrooke, Eastern Townships and Kennebec Railway, and changed its name to the Quebec Central Railway in 1875. <P2-S3>  In 1894, it built a line southward to Mégantic to connect to CP's east-west line, the International Railway of Maine. <P2-S4>  It would eventually own around 300 mi of track. <P2-S5>  In 1912, the Canadian Pacific Railway leased the Quebec Central for 99 years but continued to operate as Quebec Central Railway, including passenger service to American cities. <P2-S6>  The Quebec Central in turn leased the Massawippi Valley Railway, a short line from Lennoxville to Newport, in 1926; this allowed passenger service from Québec City via Sherbrooke to the United States of America. <SEP> <P3-S0> The Oregon Short Line Railroad (reporting mark OSL) was a railroad in the U.S. states of Wyoming, Idaho, Utah, Montana and Oregon. <P3-S1>  The line was organized as the Oregon Short Line Railway in 1881 as a subsidiary of the Union Pacific Railway. <P3-S2>  The Union Pacific intended the line to be the shortest route ("the short line") from Wyoming to Oregon. <P3-S3>  In 1889 the line merged with the Utah & Northern Railway and a handful of smaller railroads to become the Oregon Short Line and Utah Northern Railway. <P3-S4>  Following the bankruptcy of Union Pacific, the line was taken into receivership and reorganized as the Oregon Short Line Railroad.