McCrossin Foundations installed a temporary cofferdam for the construction of a new pumping station along Route 97 in Erie, Pennsylvania. The cofferdam consisted of 78 pairs of PZ-27 sheet piles, driven to a depth of approximately 30 feet. The sheets were driven through 22 feet of loose sandy silt and approximately 8 feet of dense glacial till before hitting bedrock. The sheets were installed using an ICE Model 28D vibratory hammer with an 80-ton crawler crane. Two 3-foot square reinforced concrete rings were installed inside the cofferdam to resist overturning. The General Contractor was able to excavate the required 30-foot depth to install the new pumping station.
Job Name: Route 97 Pump Station – Summit Township
Job Location: Erie, Pennsylvania
Job Type: Driven Sheet Piling
Start Date: October 2014
Completion Date: October 2015