Midsummer at the Thames Tideway Tunnel Greenwich Pumping Station. Down on the Thames Tideway Tunnel site off Norman Road, there has been great excitement as the Greenwich section of the Super Sewer project took a major step forward over the past few days. The aim is to drill a sewage overflow tunnel that will prevent the Greenwich Pumping Station having to release large amounts of raw sewage into the Thames whenever excessive rain floods the existing sewers. The overflow tunnel will connect the Greenwich Pumping Station with the massive new Thames Tideway super sewer via a new pumping station just below Tower Bridge. And in the early hours of Wednesday 15th July, the largest piece of the tunnel boring machine, the cutting head, was brought in by road, and prepared for lowering down to the bottom of the 50 metre access shaft TTT have been building here for the past two years. As you will see from the picture, the blue drill head is enormous. When it is in place at the bottom of our...