Update status clearly
Inactive, abandoned, removed and mothballed are different states and should not be confused.
Preserve relevant history
Future excavation, environmental review or redevelopment may depend on knowing what existed.
Address interfaces
Connections, easements, controls and shared structures may remain after the main asset is retired.
Close maintenance obligations deliberately
Retirement should identify which inspection, monitoring or security responsibilities end and which continue.
Scope. This page explains asset-management concepts, not operating procedures for critical infrastructure. Inspection methods, intervention thresholds and safety decisions must follow the asset owner’s standards, local rules and qualified professional judgement.