Schenectady, New York a route through the pine barrens between them. Developers in Schenectady quickly founded the Utica & Schenectady Railroad, chartered in 1833; Schenectady & Susquehanna Railroad, chartered May 5, 1836; and Schenectady & Troy Railroad, chartered in 1836, making Schenectady "the rail hub of America at the time" and competing with the Erie Canal. Commodities from the Great Lakes areas and commercial products were shipped to the East and New York City through the Mohawk Valley and Schenectady. The last slaves in New York and this city gained freedom in 1827, under the state's gradual abolition law. The law first gave
Great Lakes shipping from January to March. Some icebreakers ply the lakes, keeping the shipping lanes open through other periods of ice on the lakes. The Great Lakes are also connected by the Chicago Sanitary and Ship Canal to the Gulf of Mexico by way of the Illinois River (from the Chicago River) and the Mississippi River. An alternate track is via the Illinois River (from Chicago), to the Mississippi, up the Ohio, and then through the Tennessee–Tombigbee Waterway (a combination of a series of rivers and lakes and canals), to Mobile Bay and the Gulf of Mexico. Commercial tug-and-barge traffic on