Which maintenance activity is crucial after a heavy rainfall to avoid infrastructure failure in a sewer system?

Clearing debris from inlets is crucial after heavy rainfall because it directly impacts the ability of the sewer system to function properly. During heavy rain events, debris can accumulate in stormwater inlets, which may lead to blockages that restrict water flow. If debris is not cleared, it can cause backups, localized flooding, and even overflows in the sewer system. This can ultimately lead to infrastructure failure, resulting in costly damage and potential health hazards due to sewer overflows.

While other activities such as providing chemical treatments, performing video inspections, and documenting system performance have their importance, they do not address the immediate concerns related to heavy rainfall. Debris clearance is a first line of defense to maintain optimal flow and prevent infrastructure issues effectively.