The California Highway Patrol this morning is reporting an overturned big-rig on southbound Interstate Highway 680 in Pleasanton.
The incident occurred just north of the Bernal Avenue off-ramp.
It was first reported at 4:54 a.m.
The overturned rig reportedly spilled 27 tons of dirt onto the roadway that needs to be cleaned up.
The CHP has issued a Sig-alert due to the incident.
Several lanes of southbound Interstate Highway 680 remain closed.