This project includes the raising of Tailings Storage Area #4 at the Mission Complex located in Sahuarita, Arizona. The raise consisted of building a 19,000 linear foot berm on the top of the existing tailings. The berm was approximately 10 feet in height and 14 feet wide on the top. The berms were constructed from existing tailings material and then capped with alluvial material. Major elements included 272,000 cubic yards of embankment from the existing tailings and 101,000 cubic yards of alluvial capping.