as part of planning the orion programme for the journey beyond low earth orbit to destinations such as mars, nasa needed to demolish the existing concrete silos (built to assemble the space shuttle booster rockets) at their michoud assembly facility. this was necessary in order to replace the silos with larger space launch system (sls) core stage assembly towers. the task of removing the existing concrete silos was estimated to take three months. bluegrass was called in to regain schedule for the overall project, eventually completing the demolition of cells b and c in a month.