The flatboat trade first began in 1781, with Pennsylvania farmer Jacob Yoder building the first flatboat at Old Redstone Fort on the Monongahela River. Yoder‘s ancestors immigrated from Switzerland, where small barges called weidlings are still common today, having been used for hundreds of years to transport goods downriver. Yoder shipped flour down the Ohio River and Mississippi River to the port of New Orleans. Other flatboats would follow this model, using the current of the river to propel them to New Orleans where their final product could be shipped overseas. Through the antebellum era, flatboats were one of the most important modes of shipping in the United States.