 They were economically and culturally dependent on the river, building up industries such as tourism related to duck hunting and sport fishing, commercial fishing, musseling for the button factories, and ice cutting for early attempts at refrigeration for domestic and commercial use.With the construction of the Chicago Sanitary and Ship Canal, Chicago's sewage was pushed down the river rather than into Lake Michigan.As the canal declined by the early 1900s, it was eventually replaced by the Illinois Waterway in 1933, still in use today.