Insulated wood boxcars such as Union Line #6699, built in 1895, were used to transport dairy products such as milk, cheese, and eggs to market.

The Union Refrigerator Transit Line (URT) was a St. Louis, Missouri- and Milwaukee, Wisconsin-based private refrigerator car line established in 1895 by the Joseph Schlitz Brewing Company. In 1929, the General American Tank Car Corporation acquired the URT and placed its rolling stock into lease service. In the early 1970s the company, then operating as the General American Transportation Corporation (GATX) liquidated its URT subsidiary along with its outdated wooden reefer fleet.

URTX cars on pier 19, East River, Manhattan. 1936

Union Refrigerator Transit Line, 1930–1970:

Source: The Great Yellow Fleet, p. 17.

References

• White, John W. (1986). The Great Yellow Fleet. Golden West Books, San Marino, CA. ISBN 0-87095-091-6.
• White, John H. Jr. (1993). The American Railroad Freight Car: From the Wood-Car Era to the Coming of Steel. Baltimore: Johns Hopkins University Press. ISBN 0-8018-4404-5. OCLC 26130632.

Further reading

• Greedy, John A. (1997). "Milwaukee Road's Union Refrigerator Transit Lines 37000-Series Steel Ice Reefers." The Milwaukee Railroader 27 (2) 4–7.