1. BUILDING FOR 22ND CENTURY LONDON
NICK BUTLER
MARCH 2016

2. YOU POO TOO

3. HISTORY OF LONDON’S SEWERS

4. Lost ‘rivers’ of London

5. Bazalgette’s interceptor sewers

6. Bazalgette design capacity
Population of London
1860
2 million
2013
8 million
1910
4 million
Bazalgette design capacity
In 2014, 62 million cubic metres of sewage discharged to the tidal River Thames.
50 discharges on average in a typical year

7. CSO discharge

8. FINDING A SOLUTION

9. Finding a solution Action before sewer:
Source Control and Sustainable Drainage Systems (SuDS)
Within sewer network:
Localised storage and separation
In-river:
More ‘Bubbler’ and ‘Skimmer’ vessels
Intercept overflows:
Central storage and transfer

10. Thames Tideway Strategic Study conclusions
Two problems:
Overloaded sewage treatment works
Overloaded sewer network

11. London Tideway Improvements
Beckton
Riverside
Crossness
Long Reach
Mogden
To correct this totally unacceptable situation
Solution for the problem in 3 parts
SWU - £700 million
Lee Tunnel - £600 million
TTT – 4.1billion
All flow from TTT and Lee Tunnel to Beckton
Sewage Works Upgrades
Lee Tunnel
Thames Tideway Tunnel

12. Impact of improvements
Without the London Tideway Improvements, the annual CSO discharges would reach 70 million cubic metres in a typical year by If only the sewage treatment works upgrades and the Lee Tunnel were implemented, the annual average volume of all CSO discharges to the tidal River Thames would be 18 million cubic metres. Discharges would still occur nearly 60 times in a typical year by With Tideway in place the system will discharge four times in a typical year, up to 2.4 million cubic metres.

13. Impact of London Tideway Improvements
City
H&F
K&C
Greenwich
Richmond

14. SCOPE OF THE THAMES TIDEWAY TUNNEL

15. The Thames Tideway Tunnel

16. Tunnel statistics Length: 25 kilometres
Gradient: Falls one metre every 790 metres to be self-cleansing
Diameter: 7.2 metres
Volume: 1.6 million cubic metres (include Lee Tunnel)

17. Tunnelling through London

18. Interfaces with existing infrastructure
Bridges: 75

19. Victoria Embankment

20. PLANNING AND CONSULTATION

21. Route to Development Consent
Over six years of project development, planning and extensive consultation
Planning Act 2008
Public consultation
DCO application
Lots of Stakeholder Engagement

22. PROCUREMENT AND DELIVERY

23. Bazalgette Tunnel Limited (BTL)
The Infrastructure Provider is made up of the following investors:
Allianz
DIF
Dalmore Capital Limited
Amber Infrastructure Group
The investor group includes a significant proportion of UK pension funds through which over 1.7 million UK pensioners will have an indirect investment in Tideway.

24. Main Contractors
West
Central
East
System Integrator

25. OUR VISION

26. Reconnecting London with the Thames
Our challenge is to build a new sewer for London, to prevent the frequent pollution of the River Thames.
Our vision is not just to clean up the Thames but to promote a change in the relationship between London (and Londoners) and their river.

27. Coping with population growth
More than just a sewer
Coping with population growth
Jobs and skills
Tourism
Economic
Ecological
SMEs
Public Health
Increased river use
Health and Safety
Environmental
Recreation

28. Blackfriars: Before

29. Blackfriars: After

30. 2015 2016 2017 2021 2022 Timetable BTL granted licence by Ofwat
Main Works contracts awarded
2016
Main works preliminary construction
begins
2017
Tunnelling
begins
2021
Tunnelling ends
2022
System commissioning begins

31. Working with the MMO as a regulator
Tideway/MMO collaborative working ambition
Both MMO and Tideway believe the working relationship can serve as a ‘best practice’ model primarily because of the following:
Embedment of MMO resources within the Project offices (co- location)
Strong working relationships at all levels
Proactive and open engagement with the MMO early in the process
Pragmatic approach (particularly on unexpected issues arising)
One-Team approach with Tideway employees respecting the skill sets of the MMO team members; Realising the MMO has to do their job as a regulator

32. Working with the MMO as a regulator
Ongoing challenges/opportunities:
Maintaining routine and open dialogue between Tideway and the MMO on customer service and productivity
Maximising efficiency gains through the Better Regulation agenda
Exemptions (well underway already – Tideway MMO Approval Efficiencies Note)
Fast-track licensing (limited opportunities – but potential is there for unexpected situations)
Evaluate options for self-regulation (pending)
Where appropriate Tideway to support MMO on PLA delegation discussions with Defra
Where appropriate Tideway to support MMO on Thames Concordat initiatives (e.g single point of contact)

33. QUESTIONS?