To upgrade treatment plant infrastructure that dates to 1920, crews built new digesters, membrane reactors and ultraviolet disinfection systems.

The Caltrans highway project would reconfigure the infamous intersection where the 24-year-old 'Rebel Without a Cause' movie star fatally crashed in 1955.

Photographer Jason Rath took to the air to capture this image of the $48.2-million Los Osos Water Recycling Facility in San Luis Obispo.