Risteau Lime Kiln is a pre-1785 intermittent burn box kiln, a design popular since the Middle Ages, that required 9 to 12 days to produce a batch of quicklime because air temperature and humidity and the heat from the burning wood varied. After each quicklime cycle, the kiln had to be unloaded, cooled, and reloaded before another batch of lime could be produced, a process that greatly reduced productivity. Unlike its two adjoining companion kilns, this structure has a front façade approximately 18 feet across, 2 feet thick, and 25 feet tall, forming a three-sided wall with the north and south sides extending far back into the hillside for stability and no west or back wall. Inside is a circular stone burning chamber or stack 13 feet in diameter and 2 feet thick where the lime baking took place, and the space between the two walls was filled with a mixture of sand and clay, most likely for insulation and heat retention. The kiln had no chimney, and standing beside the Jenifer Kiln, it demonstrates the evolving technology and architectural design of the lime burning industry in just under 100 years.