The Hefty-Zumbrunnen Cheese Factory, RFD, Monticello, was located in Washington Township, Green County. August Martini was the cheesemaker, operating in the early 1900s, and later Henry T. Hefty and Julian Kiechli in the 1920s. The factory was destroyed by fire in July of 1933. It was rebuilt, renamed and operated as the Pioneer Cheese Factory, and resumed processing of Limburger in October of the same year. Cheesemakers under the name of "Pioneer" were John Moser, Julian Kiechle and Emil Frehner. The factory closed in 1952. Questions or comments may be directed to Mary Ann Hanna at 608-325-4324 or nhcchistory@yahoo.com.