Hyperion Treatment Plant
5-Mile Outfall Inspection
and Diversion to the 1-Mile Outfall
The City of Los Angeles’ Hyperion Treatment Plant is
sending divers into the Plant’s 5-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
The documents linked below describe the necessity of the inspection, how the process will work, and what precautions are being taken.
In addition, the Southern California Coastal Ocean Observing System will provide real-time data related to the activity.
For more information, contact the City of Los Angeles Bureau of Public Works at (213) 978-0333, or e-mail firstname.lastname@example.org.
Extensive monitoring of shoreline waters will take place before, during, and after the inspection of the outfall. In addition, beaches from Ballona Creek to the Manhattan Beach Pier will be closed during the inspection as an added precaution to protect public health. Beaches will reopen as soon as bacteriological data confirm that the waters are safe. At that time, the beach closure signs will be removed.