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Sinkhole keeps Modesto Highway 99 on-ramp closed for second day

A closure prompted by a sinkhole along the side of a Modesto freeway on-ramp is stretching into a second day.

California Highway Patrol announced the closure Monday morning. The sinkhole is on the Highway 99 on-ramp from 4th Street.

It's unclear what is causing the sinkhole, but the on-ramp will be closed for the time being as crews work on a fix.

No estimated time of reopening has been given so far, CHP says. Drivers will have to detour around the closure by using the next on-ramp. 

As of Tuesday, the on-ramp remains closed as Caltrans crews continue work on fixing the sinkhole.

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