$160 per cubic yard, complete in place seems extremely low, I typically use about double that number for structural concrete. If post tensioned, you may need to add even more. You will need to add for the site and appurtenant work such as site work such as excavation and backfill, waterstops, paint or coatings, disinfection, testing, tank and yard piping, ladders, hatches, vents, roof, RTU, lighting, fencing, etc...