Millions of gallons of water lost in Hetch Hetchy regional water system pipeline break

Millions of gallons of water have been lost from a 54-inch regional transmission line that broke at Junipero Serra County Park in San Bruno on Monday night, a San Francisco Public Utilities Commission spokesman said.

The break was reported at 9:30 p.m. Monday at the entryway to the park on Crystal Springs Road, SFPUC spokesman Tyrone Jue said.

The water is flowing back through the park and into a creek that runs into the Bay, so no property damage has been reported.

Jue did not have an estimate for how much water has flowed out of the broken pipe but said it was “easily millions of gallons.”

He said the water was still flowing as of shortly after 8:30 a.m. so crews have not been able to inspect the pipe for damage and do not know how long it might take to repair.

The pipe supplies water to the Peninsula as part of the Hetch Hetchy Water System. Jue said customer service is not currently affected by the broken pipe.

He said the SFPUC is working this morning with regional utilities connected to the line to set up backup water supplies.

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