Premise: The Jerome Cooperative Creamery is a cooperative creamery and also refers to historic lava rock structures used by the creamery on Birch Street in Jerome, Idaho, United States. The structures were listed on the National Register of Historic Places in 1983. They were built in 1915, 1924, and 1933 by master stonemason H.T. Pugh who popularized the use of lava rock in the Jerome area.
Hypothesis: The earliest built historic lava rock structure used by the creamery is over 100 years old.