There are three opposed elements: the towers, the street and the shaft. The gaping maw of the Super Sewer goes down as far as the surrounding towers climb, but it is covert, safe behind barrier walls, protected by yawning security operatives in hard hats, charged with stalling appointments. This buried London, a labyrinth of antiquated tube tunnels, abandoned stations, Crossrail advances, medieval burial pits, utilities, intersecting sewers, lost rivers, bomb shelters, escape hatches for royalty, is the most disturbing of the three layers. We feel the cuts of earth surgery, even when we have no knowledge of where they are happening. We shudder in ignorance as monstrous machines chew through clay. We feel a physical shift in the balance of things. But we have no reliable chart. The story is told before it happens. And it has to be experienced, in order to confirm its CGI fictions.
Launched from a 35-metre concrete-sheathed hole, the Super Sewer arrives, after flattering the swerves and quirks of the Thames, at a sixty-metre pit: the point at which this pristine newcomer, just a little fatter and rounder than the six Tunnel Boring Machines that dug her out, prepares for its rendezvous with the admired brickwork of Joseph Bazalgette’s overwhelmed Victorian outflow. Such imaginative solutions were required, at whatever the cost (in the end it was £4.3 billion), to reduce the horror of the raw sewage and indestructible sanitary and convenience products spewing into London’s river.