The B&I ceased to exist as an independent company when it merged into the Bellefontaine Railway in September 1864.

[3] A construction firm owned by Amasa Stone, Frederick Harbach, and Stillman Witt contracted to build the Ohio line.

Construction began in 1849 in Indiana, and the portion of the line from Indianapolis to the Indiana-Ohio border (the I&B) was largely complete by 1851.

[12] The IUR opened the world's first union station in Indianapolis, Indiana, on September 20, 1853.

Continuing eastward from Union City, Ohio, it passes through Versailles and Sidney before reaching its other namesake, Bellefontaine.

This Indianapolis-Bellefontaine main line remains an important rail corridor into the early 21st Century, where it is now owned and operated by CSX Transportation.