Temporary support of excavation was installed to support the ground surrounding excavation for the Charles Street Pump Station at the South Williamsport Wastewater Treatment Plant. The shoring was a square cofferdam constructed of cantilever sheet piles. The materials encountered were very dense, silty sand with gravel, and gravel with silt and sand. Underlying bedrock was not encountered; however, the material was too dense to drive. Pre-drilling was performed to enable installation of the sheet piling. A total of 180-linear foot of PZ-27 Gr. 50 steel sheet piling was installed a total of 35-feet from grade.
Job Name: Charles Street Pump Station
Job Location: Williamsport, Pennsylvania
Job Type: Shoring and sheet piling
Start Date: April 2012
Completion Date: April 2012