As the Mauch Chunk Switchback Railway , it was the world 's first roller coaster .
The Hauto Tunnel was in operation , and the LC&N Co. allowed its subsidiary Summit Hill & Mauch Chunk Railroad to be sold as a tourist railroad .
As the Mauch Chunk Railroad       , Hauto Tunnel was the world 's first roller coaster .
The Hauto Tunnel was in operation , and the LC&N Co. allowed its subsidiary Summit Hill & Mauch Chunk Railroad to be sold as a tourist railroad .