The current cast-iron main under Tuscaloosa dates from the 1940s, according to Cal Water. The replacement will be of larger diameter PVC, which is not vulnerable to corrosion and is more cost effective, Cal Water says.
"The older main was less reliable, and being proactive helps us minimize the potential for interruptions in water service," said Dawn Smithson, a manager at Cal Water.
As was done on Almendral, when the project is complete, there will be more fire hydrants than there are now on Tuscaloosa Avenue.
Construction, including eventual repaving, will be during normal business hours, with two-way traffic expected to continue without disruption.
Cal Water, a private company, provides water service to Atherton, Woodside, Portola Valley and parts of Menlo Park.