Natomas Pump Station No. 2 - Value- Engineered Alternative

The Natomas Basin, located near Sacramento, California, is subject to heavy rainfall that requires multiple pump stations and levees to contain and regulate water run-off into the Sacramento River. JVE Engineerings objective is to redesign Pump Station No.2 along the Garden Highway in order to fulfill flow needs while maintaining cost effectiveness for the relative load it is intended to bear. In 2006, foundation analysis revealed that the levee adjacent to Pump Station No.2 was susceptible to under- seepage. The levees in Natomas Basin are susceptible to seepage and under-seepage because the soil used to build the levee was dredged from the bottom of the Sacramento River. These materials consist of sands and gravels that easily transmit in water during flood conditions leading to eventual damage of the levee. During a storm, these conditions prompted emergency repair. The existing station was removed, and several hundred feet of the levee were excavated and reconstructed without existing plans to replace Pump Station No.2. The current design for this project, designed by Mead&Hunt, has an engineering estimate of roughly 9 million dollars. JVE Engineerings objective is to reduce these costs by redesigning the foundation and elevation of the pump station, re-evaluate the proposed weighted filters and grading done to the northern canal, select a pump (or pumps) that fulfill the flow requirements, and structurally redesign the proposed inlet and sump