standpipes or other facilities for storing water, sewage or other liquids or gases, electric power substations , telephone exchange buildings and structures, and pumping stations; and (2) Overhead transmission, distribution, or communication wires, lines, or cables, and facilities
Read it in the chapter →How this ordinance defines it
The operative definition is the local one. Codes routinely subdivide a category into tiers — “day care 2, family”, “group home 2” — and attach different permissions to each, so only Alexandria’s own text settles what this covers.