Oak Street Pump Station Upgrade EU-3 Bellingham, Washington Back to Project List Jet Grouting Overlapping jet grout columns are installed adjacent to the wet well and along the front of the pump station building for excavation support. Project Overview: Layne GeoConstruction installed a total of 72 jet grout columns to depths ranging from 9 to 56 feet, using a combination of single and double-fluid jet grouting techniques. The objectives were to provide a groundwater barrier, excavation support, and structural underpinning. Underpinning the existing pump station was achieved through the installation of 16 columns around the perimeter of the building. The columns were installed in groups of four, designed for loads of 400 tons. Jet grout columns were installed as an alternative to piles for the support of the new generator building. Overlapping jet grout columns were installed along the front of the pump station and adjacent to the wet well. The purpose of the wall was to provide support of excavation and groundwater control during the modifications to the inlet piping. Additional columns were installed to provide pipe support at a number of locations.     Value of Work Performed: $165,000 Project Duration: 3 weeks Project Completion Date: September 2003 Project Reference: Proiect Owner: City of Bellingham, Washington Ravyn Whitewolf (360) 676-6961 Engineer: GeoEngineers Dan Mageau (206) 728-2674 General Contractor: Strider Construction Company, Inc. Donald Rasmussen (360) 380-1234