Flatboats were the most prolific type of vessel on the Ohio and Mississippi Rivers during the early 1800s. Thousands of these boats descended the two rivers each year, carrying not only valuable cargo to New Orleans but also western-bound emigrants to newly opened territories. By the late 1800s, flatboats had completely disappeared, and no intact examples were known to exist. Our knowledge of these historic vessels had been limited to illustrations, memoirs, and traveler accounts.

That changed in 2000 after local residents found a wreck on the Ohio River shoreline in Illinois....