Metropolitan's groundbreaking project to replace a nearly century-old portion of the Colorado River Aqueduct with one of the largest earthquake-resistant pipelines in the world has earned national recognition for sustainability and resilience.
The Institute for Sustainable Infrastructure awarded the Casa Loma Siphon project its prestigious Envision Silver Award. The five-mile-long siphon is a critical piece of the system delivering Colorado River water to Southern California. Crossing the Casa Loma fault in the San Jacinto Valley, the 148-inch concrete and steel pipe had been damaged over time by earthquakes and subsidence from groundwater pumping.
The $37 million project replaced 1,200 feet of the existing line with two parallel barrels of 104-inch diameter Earthquake-Resistant Ductile Iron Pipe that is designed to withstand ground movement. The project was the first to use earthquake-resistant pipe of this magnitude outside of Japan, where the technology was developed.
“Metropolitan is honored to receive this recognition for our work to make Southern California’s water supply resilient to earthquakes and climate-related risks. This investment increases our overall reliability for the many communities we serve,” said Assistant General Manager John Bednarski.
Read the press release.
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