Built in 1865 by James Moroni Thomas, this historic kiln in Ogden was a giant fireplace used to produce lime for pioneer-era construction. Limestone quarried in the canyon was broken into small pieces and brought by wagon to the kiln, where layers of wood and limestone were loaded into the circular burning chamber. A fire kindled at the base sent heat upward through the load over several days, transforming the limestone into quicklime that dropped into the hole at the bottom to be scooped out. The kiln reportedly produced 300 bushels of lime a day, and the lime was hauled to the southwest corner of 24th Street and Grant Avenue to be sold by the bushel or wagonload to white washers and builders for making mortar and plaster. It supplied much of the lime used in many of Ogden's residential, municipal, and commercial buildings in the late 1800s. When Portland cement came into wide use in the early 1900s, lime was used less in construction and the kiln was no longer needed. After years of deterioration from weather, age, and vandalism, the kiln had become a pile of rubble, but in the 1980s it was rediscovered when the U.S. Forest Service found a wagon axle and other artifacts at the site. Restoration began in 2003 with volunteer help, using stones gathered from surrounding canyons and nearby riverbeds, and was completed in 2008 with support from a Weber County Recreation/Arts/Museum/Parks grant.