Lehigh Valley Hospital Project Phase I East Parking Structure Allentown, Pennsylvania Back to Project List Limited Mobility Grouting Compaction grouting is placed to stabilize karst soils beneath new parking garage at a hospital in Allentown, PA. Project Overview: Layne GeoConstruction was contracted by The Vvhiting-Turner Contracting Company to stabilize the karst geology beneath a new 4-story parking garage structure at Lehigh Valley Hospital. Layne injected a low slump, low mobility grout to provide soil stabilization for the structure, which is underlain by residual soils overlying generally poor quality limestone bedrock. 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 290 holes averaging 45 feet, with depths ranging from about 10 to 200 feet. Over 2,100 cubic yards of low mobilily grout were placed.     Value of Work Performed: $700,000 Project Duration: 3 months Project Completion Date: April 2005 Project Reference: Project Manager: Marc Breidenbach (610) 402-8558