Broken pipe leaves muddy mess in Hollywood Hills neighborhood

HOLLYWOOD HILLS, LOS ANGELES (KABC) -- A Hollywood Hills neighborhood was left with a muddy mess Wednesday after a broken pipe caused flooding and mud flows.

Authorities originally believed the flooding came from a water-main break, but DWP says this was a six-inch lateral pipe to a fire hydrant that broke. It's not yet known if the hydrant was hit by a vehicle, or if a leak caused the rupture.

The incident was discovered around 12:30 a.m. in the 8400 block of Grand View Drive, with water gushing down to Sunset Boulevard.

Several streets above Sunset Boulevard were shut down due to the mud and debris that flowed into lanes and driveways.

Los Angeles Department of Water and Power repair crews are on scene, according to the Los Angeles Fire Department.

Sunset Boulevard remains open. Repairs and cleanup was estimated to take about 10 to 12 hours, LADWP Superintendent Kirk Broyard said.

Geologists will survey the integrity of the hillside and homes potentially affected.