Thames Tideway Tunnel goes green

The Thames Tideway Tunnel (TTT) is being built by Bazalgette Tunnel Limited, and its associated firm Bazalgette Finance has issued GBP 175m of index-linked green bonds in order to support the design, building, commissioning, and maintenance the Tunnel in London.

S&P Global Ratings has given the bonds its highest Green Evaluation rating, taking a weighted aggregate of the subscores: transparency (88/100), governance (93/100) and mitigation (97/100). The Green Evaluation includes the positive environmental impact from the increase of available fresh water in the tidal Thames from wastewater treatment, as well as carbon savings.

The TTT aims to manage the amount of sewage discharged in the River Thames and the growth in water and sewerage demand associated with London’s growing population. It was also designed to ensure the resilience of the infrastructure to changing weather patterns associated with climate change, in particular warmer and wetter winters that are likely to result in more frequent combined sewer overflows.

    Share Story:

Recent Stories