The work rarely makes headlines: a trench opened at dawn, a section of old pipe lifted out, a newer one lowered in before the road reopens by evening.

A campaign against age and salt

Yet for engineers charged with keeping water moving through one of the world’s most densely populated cities, these small operations add up to a long campaign against age, pressure and salt.

The challenge is logistical as much as technical. Every closed lane ripples through traffic, and every shutoff has to be scheduled around homes, shops and clinics that cannot go long without supply.

What resilience buys

Planners say the payoff is resilience: fewer bursts, less lost water, and a network better prepared for the demands of a growing population.