For over 70 years, Gratz was a busy port town, with the Kentucky River serving as its highway. Between 1848 and 1930, steamboats and packets traveled the river and docked at Clay's Lick Landing just north of town. Steamboats carried passengers to and from Louisville and Cincinnati, farmers shipped livestock and produce from the landing, packets carried the mail, and showboats brought entertainment. The business district was active, and in 1883 the Planter's Hotel advertised accommodations for the traveling public. Townsfolk and farmers could buy a wide range of goods in Gratz, while local firms also provided custom milling of grain, compounded medicines for physicians' prescriptions, blacksmithing, and coal delivery. During the steamboat era, Gratz grew and prospered, but much of its commerce depended on the Kentucky River. In the early 20th century, trucks and automobiles began replacing steamboats, and by 1930 river trade had all but disappeared. The construction of the Highway 22/Gratz Bridge in 1931 connected Gratz to the state's expanding highway system, drastically changing life in the community, though the town continues to take pride in its history as a river town.