[hcoles]

The Dad needs to fix this project first. Get a quote for fixing the slab from the best concrete contractor you can get to come over. See what he/she says. No doubt this has happened before to an experienced contractor - what did they do? Start by calling the highest cost general house building contractor (built the fanciest houses in the area) and ask who does his concrete. Just say my driveway has holes forming - not sure what to do.