Lehigh Valley Hospital Project Cedar Crest Expansion, Phase II Medical Office Building Project Allentown, Pennsylvania Back to Project List Limited Mobility Grouting Low slump, low mobility grout is injected to stabilize the karst geology in preparation for construction of a new medical office building. Project Overview: Layne GeoConstruction was contracted by The Whiting-Turner Contracting Company to stabilize the karst geology beneath a new 4-story medical office building at Lehigh Valley Hospital, by injecting a low slump, low mobility grout. The building is underlain by residual soils overlying generally poor quality limestone bedrock. The top of rock varies from near ground surface to over 125 feet in depth. Due to the karstic conditions and the potential for future sinkhole development, the compaction grouting program included a combination of deep and shallow compaction grout holes. Layne GeoConstruction drilled over 270 holes averaging 45 feet in depth, with depths ranging from 11 to 158 feet. Over 3,300 cubic yards of low mobility grout were placed.     Value of Work Performed: $950,000 Project Duration: 3 months Project Completion Date: June 2005 Project Reference: Project Manager: Marc Breidenbach (610) 402-8558