The city's network of utilities long predates any sort of central authority managing them. Each utility maintains its own network of infrastructure, independent

The city's network of utilities long predates any sort of central authority managing them. Each utility maintains its own network of infrastructure, independent of any other; most of them are not mapped, and where mapping has been done it's not shared with the municipalities or other utilities, let alone publicly available. There are no ducts set up for general usage. And the sewers a) aren't human-travelable like the old ones in Paris or parts of London; and b) overflow in heavy rains. You probably don't want to run electrical wiring through them.