Sewer Network Monitoring —
Field Recovery & Diagnosis

Context

Where the sewers meet — and overflow

The network covers a series of sites where several sewer lines converge, with overflow points. At each site, a street cabinet measures water flow in the different directions and reports the status of the management valves.

When I arrived, several cabinets were down: two without power, one half destroyed. The remote data the operator relied on had stopped coming in.

The brief: find out what still worked, bring back what could be brought back, and establish what it would take to restore the full monitoring chain.

Interventions

Cabinets, power and controllers back on line

The destroyed cabinet was replaced and fully rewired. The cabinets without power were reconnected to the grid.

On the controllers, failing components were replaced and programs and status restored using the manufacturer's proprietary software — bringing back the one in poor condition and recovering the one in fatal error.

At the end of this phase, the cabinets were powered and the controllers running again.

Where it stopped

Three blockers, one honest conclusion

Communication: the system transmitted over 3G, which has been switched off in Belgium. There is no straightforward replacement without intervening at the client's closed central site — access that was refused.

Sensors: years in the sewer had taken their toll. Once the measurement devices were restored, no readings came back to the surface. Replacing the sensors means underground work at every site.

Context: the sites are being handed over to another company that will use different controllers. Investing in new sensors and communications for a system about to be replaced made no sense — so the investigation was stopped there.

Outcome

What was restored, what wasn't

Stopping is a result too: the operator knows exactly what works, what doesn't, and what it would cost to go further.