A merchant named Joseph Dart Jr., is generally credited as being the one who adapted Oliver Evans' grain elevator (originally a manufacturing device) for use in a commercial framework (the trans-shipment of grain in bulk from lakers to canal boats), but the actual design and construction of the world's first steam-powered "grain storage and transfer warehouse" was executed by an engineer named Robert Dunbar. Thanks to the historic Dart's Elevator (operational on 1 June 1843), which worked almost seven times faster than its nonmechanized predecessors, Buffalo was able to keep pace with—and thus further stimulate—the rapid growth of American agricultural production in the 1840s and 1850s, but especially after the Civil War, with the coming of the railroads.