This annular fill project required an especially strong and dense yet flexible product that would resist environmental degradation and provide long-term stability for the structure of the mine. The project specification required a material density of 500 psi. Local contractor Condeck chose to use Aerix Industries AERLITE-iX™ non-pervious cellular lightweight concrete (CLWC) as the annular fill products of the mine. The mine presented a unique challenge because of its remote location, requiring all of the equipment to be transported up steep, one-mile inclines. The four-person crew from Condeck installed 350 cubic yards of AERLITE-iX™ into the mine’s annular space, pumping it through a 2” hose for distances of up to 150 feet. The entire installation including mobilization into this remote area was completed in three short days.