This afternoon, the Streets Dept showed up with a truck full of gravel, which they dumped into the hole. I don't know the extent to which it filled in the parts that tunneled under the roadway towards the middle of the street, or up along the curb. So there still may be some structural weakness issues. But, at least, the most pressing danger seems to have been temporarily alleviated. The crew said they'd be back to actually address the problem on Monday. Al Krigman
