In the 2000s, underground voids associated with the ... and-concrete matrix to cap shafts and low-mobility grouting to fill voids, local records show. In that case, microgravity geophysical ...

New Jersey has a sinkhole problem. Here's everything we know about sinkholes and how they are crippling Routes 80 and 287 in North Jersey ...

We did some core holes and we realized we had a void. "So, we ordered 10 yards of a slushy concrete grout mixture, and we filled that hole in. That hole will fill up evenly. So, we did that with ...