# Ghost Infrastructure

## Systems That Still Run from Previous Eras

In the northeast corner of Block 11, Level 2, a fire suppression system from 2043 activates every third Thursday at 2:17 AM. The system — a wet-pipe sprinkler network fed by a dedicated water supply that was supposed to have been decommissioned during the 2089 renovation — produces a fine mist from ceiling-mounted nozzle heads that haven't been replaced in 183 years. The mist lasts for forty-seven seconds. The nozzle heads, corroded to near-uselessness, produce a spray pattern that covers approximately 30% of its original design area. The water tastes like iron and time. The residents of Level 2 have adapted — they keep their possessions covered on third Thursdays, and the children treat the bi-monthly indoor rain as entertainment. Three maintenance requests have been filed to decommission the system. All three were closed with the notation: "System not found in current building schematic."

This is ghost infrastructure. Systems that were installed by previous eras, omitted from subsequent renovations' documentation, and forgotten by every human database — but not by the infrastructure itself. The infrastructure remembers. It continues to perform its function long after the function's context has disappeared, long after the building it was designed to protect has been rebuilt around it, long after the engineers who installed it have died and the company that manufactured it has been acquired and dissolved and forgotten. The fire suppression system in Block 11 does not know that it is a ghost. It knows only that it is Thursday, and that the timer has counted to zero, and that water must flow. So water flows.

The power lines are the most common ghost infrastructure. GLMZ's electrical grid has been rebuilt seven times since the original 20th-century installation, each rebuild overlaying the new on the old without fully removing the old. The result is a layered power distribution system that contains live circuits from every era of the city's history. A cable survey conducted by the municipal engineering division in 2218 identified 847 active power conduits that carry current to destinations that no longer exist — buildings demolished decades ago, facilities sealed and abandoned, addresses that the city's mapping system has deleted. The current flows. The meters spin. The electricity arrives at junction boxes that connect to nothing, dissipating as heat in walls that contain no rooms and floors that support no feet.

The most unsettling ghost infrastructure is the communication network. GLMZ's communications backbone includes fiber-optic lines from the 2040s that still carry data — not dead signals, not noise, but formatted data packets following protocols that haven't been used in a century and a half. The data originates from sources that the network's routing tables cannot identify and is addressed to destinations that the network's mapping system cannot locate. The packets circulate through the ghost fiber like blood through a circulatory system whose heart stopped beating long ago — propelled by repeaters that still amplify, switches that still route, and protocols that still function because no one told them to stop. Network engineers who have analyzed the ghost data describe it as mundane — emails, file transfers, system logs — from an era when this fiber connected offices that no longer exist, carrying conversations between people who are no longer alive, conducting business for companies that no longer operate. The data has been circulating for approximately 140 years. The conversations it carries have been finished for longer than most of the city's residents have been alive. But the network does not know this. The network only knows that data was given to it and must be delivered, and so it tries, packet by packet, to deliver messages to recipients who will never receive them, through a city that has forgotten they were sent.