Geotechnical Investigation for Advanced Water Purification Facility for the Hyperion Water Reclamation Plant (HWRP) (2019-2020)
HWRP is located within the City of Playa Del Rey, California, and is the largest facility of its kind in California. The Plant included several below-grade and partially below-grade liquid retaining structures, pump stations, and a below-grade pipeline system. In addition, the proposed developments consisted of the design and construction of an Advanced Water Purification Facility (AWPF) at the subject site, including:
- A new 1.5 MGD AWPF was to be constructed on about 30,000 square feet footprint area on the west side of the Plant and over the footprint of the to-be-demolished existing Dissolved Air Floatation (DAF)
- A new Product Water Storage Reservoir (PWSR), with a footprint area of about 22,000 square feet on the northeast corner of the site
- An Export Pump Station with a footprint area of about 10,000 square feet, adjacent to and on the northeast side of the proposed Product Water Storage Reservoir
- A pipeline with an approximate length of 2,000 feet along the eastern property line, to connect the proposed PWSR to the AWPF
GAI conducted a comprehensive geotechnical investigation and geohazard evaluation for the project, which included conducting more than 15 deep borings, performing laboratory tests, engineering analyses, evaluating the stability of the adjacent hillside slope (100 feet in height), and preparing a final report for the project design team which included recommendations for the design and construction of the treatment facilities. The project involved a tight schedule and GAI was able to comply with the design team (Brown and Coldwell) and the design-build contractor (Walsh) timeframes successfully.
AGENCY/CLIENT: LA Sanitation & Environment (LASAN)/Brown and Caldwell