The Hyperion Treatment Plant is inspecting its 5-Mile Outfall November 28-30 requiring diversion of effluent flow to the 1-Mile Outfall. L.A. County beaches from Ballona Creek to the Manhattan Beach Pier are closed as a precaution.
The City of Los Angeles’ Hyperion Treatment Plant is sending divers into the Plant’s Five-Mile Outfall on November 28th to 30th (weather permitting) to assess its structural condition, evaluate its reliability and identify potential trouble spots before they could become problems.
Hyperion Plant’s Five-Mile Outfall is a pipe that runs under the ocean and through which Los Angeles’ processed wastewater, called effluent, is discharged on a daily basis. It was built in 1960, and is inspected externally every year. The Five-Mile Outfall has never been inspected internally during its near 50-year existence.
In order to assess the condition of the pipe and to ensure the safety of divers during the operation, Hyperion’s secondary treated effluent will be diverted from the Five-Mile Outfall to the Plant’s One-Mile Outfall over the three-day period.
As a precaution to protect public health, beaches will be closed from Ballona Creek to the Manhattan Beach Pier, and an extensive water monitoring program will be implemented throughout the diversion. Beaches will reopen as soon as bacteriological data confirm that the waters are safe. At that time, the beach closure signs will be removed.
For more information, including updates on the inspection, visit LASewers.org.
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