The Miami and Erie Canal, which connected the Ohio River with Lake Erie, was built through the Great Miami watershed. The first portion of the canal, from Cincinnati to Middletown, was operational in 1828, and extended to Dayton in 1830. Water from the Great Miami fed into the canal. A later extension to the canal, the Sidney Feeder, drew water from the upper reaches of the Great Miami from near Port Jefferson and Sidney. The canal served as the principal north-south route of transportation from Toledo to Cincinnati for western Ohio until being supplanted in the 1850s by railroads.