Hollingsworth Pack is now providing third-party inspection services to plumbing contractors and excavation companies in Central and South Texas. Many sanitary drain systems that fail require tunnel excavations below slab-on-grade foundations to repair or replace the damaged piping. More municipalities in the region are requiring a third-party structural engineer to conduct structural assessments for all of these tunnel repairs. In some cases, the plumbing repair requires removing sections of grade beams, which can impact the structural capacity of the foundation.  In these situations, we can provide recommendations to have these areas of the foundation supplemented with piers installed within the tunnel to ensure that the structural capacity of the slab will remain after the repair is made.