Neville Island

The original bid design had 18" diameter caissons adjacent to the Monongahela River in very dense silty sand alluvial deposits with cobbles and boulders. Due to the difficult ground conditions and extremely tight access, Clearwater Geotechnical working as a specialty Geotechnical subcontractor to Lone Pine Construction, offered an alternative design utilizing 7 " diameter micropiles with 0.408 wall thickness schedule 80 mill secondary casing.  All of the micropiles were installed complete in 3 weeks up to a depth of 75 feet enabling the general contractor to accelerate their schedule.


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