Alamitos Barrier Deep Soil Mixing Pilot Study (Physical Barrier Project)
The USBR and the WRD are initiating the pilot investigation to test the hydraulic effectiveness of a physical wall constructed of a deep soil-slurry mix. Information obtained from this study will be used to determine the feasibility of constructing a full scale physical barrier project for any of the three barrier systems within the District's boundaries. |
The Alamitos Barrier Deep Soil Mixing Pilot Study seeks to evaluate the effectiveness of constructing a physical barrier to prevent seawater intrusion at the Alamitos Gap. Currently, there are three seawater intrusion barriers systems within the WRD's service area, all of which are operated by injecting potable or advanced treated recycled water into a series of wells to maintain a freshwater "mound" to protect against seawater intrusion. In recent years, the cost for this water has increased significantly; therefore, the WRD has been working closely with the U.S. Bureau of Reclamation (USBR) to identify alternatives to provide protection against seawater intrusion.