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The C & H Refinery historic district is an intact industrial complex including the original house/office, refinery building and equipment, related storage tanks, and operation structures in their original locations. The refinery began petroleum distillation operations in 1933 and has recently been restored to operating conditions. In July 1999, the Guinness Book of World Records, Ltd. listed the C & H Refinery as the smallest functioning oil refinery in the world.