Proper backfilling approaches at some stage in sewer pipe deploy are essential to hinder settling
https://eliascloud.s3.us-east.cloud-object-storage.appdomain.cloud/uncategorized/the-lifecycle-of-a-sewer-pipeline-from-installation-to-replacement.html
Proper backfilling thoughts throughout sewer pipe deploy are very important to ward off settling and moving that would compromise the integrity of the pipes.