June 28, 1864 – The members of the Chicago Packers’ Association agree on four resolutions at a meeting in the Tremont House. They are as follows:
Resolved, That it is the sense of this association that the various stock yards of this city should be consolidated into one.
Resolved, That said yards should be conducted by a joint stock company, the stock of which should be accessible to all.
Resolved, That the said yards to meet the requirements of the different interests concerned ought to be located near the city limits of the South Division.
Resolved, That a committee of three be appointed to confer with the committee of the Common Council in relation to the sanitary condition of the Chicago river, and that such joint committee examine each and every slaughter, rendering and packing establishment and their relation to the condition of the river.
In this same year of 1864 the Union Stockyards opened on 320 acres of swampland just southwest of the city, land that was purchased for $100,000. Within five years the area would be incorporated into the city. On July 20, 1974 the enterprise closed, 110 years after the four resolutions were adopted in the Tremont House on the southeast corner of Lake and Dearborn.