Lightning Grounding Rod in Sewer Line

At some point in time lightning rods were installed on the roof of this customer’s house. They are attached to a large copper wire that runs down the wall of the house and into the ground to connect to a very long copper grounding rod in the ground. The problem is they ran the rod directly through the sewer line causing sewer backups for the customer. We found the rod, dug up the line, removed it, repaired the pipe and then restored the ground.