Parts of infrastructure
- "grid"
- "main"
- "penal facility"
- "penal institution"
- "power grid"
- "power system"
- "public works"
- "school system"
- "sewage system"
- "sewage works"
- "sewer system"
- "transit"
- "transportation"
- "transportation system"
- "water"
- "water supply"
- "communication equipment"
- "water system"
- "communication system"
- "fire station"
- "firehouse"
- "gas system"