GrahamCrackers: Jamul Kiln Ruins Blogger
Jan 05, 2014· Jamul Kiln Ruins. The structure houses two octagonal kilns, a brick smokestack rising more than thirty feet above them. Limestone and clay from a deposit on the hill behind were once burned in these kilns by the Jamul Portland Cement Manufacturing Company, an enterprise created during the boom of the 1880s.".