Pre-consultation documents (2004-2010).
Cost Benefit Working Group Report - Open this document
Identify and evaluate the costs and benefits associated with the Tideway Solutions developed by the Solutions Working Group, and then to present a relative cost-benefit assessment of the different options.
Cost Benefit Working Group Report – Open this document
An assessment of the costs and benefits of the options under consideration.
Executive summary - Open this document
Study investigating the environmental impact of wet weather discharges from 57 CSOs through London and identifying different options for solutions.
Jacobs Babtie Independent Review - Open this document
Independent Review to assess whether there are economic partial solutions to problems caused by sewage overflowing to the River Thames when it rains.
Objectives and Compliance Working Group – Report 1 - Open this document
Report of the objectives and compliance working group .
Objectives and Compliance Working Group – Report 2 - Open this document
Second volume of the report of the objectives and compliance working group.
Planning and Environment Working Group Report - Open this document
Report of the Planning and Environment Working Group
Solutions Working Group – Report 1 - Open this document
Working group report on tunnels and shafts.
Solutions Working Group – Report 2 - Open this document
Solutions working group report on treatment.
Steering Group Report - Open this document
Final report of the steering group.
Summary Report – Open this document
Option development report for the Thames Tideway Tunnel and Sewage Treatment Works upgrades.
Supplementary Report - Open this document
Further investigation of the proposed long-term tunnel solution and of alternative measures including temporary or interim works and some smaller scale tunnel and/or treatment options to deal with the discharge of storm water from Combined Sewer Overflows (CSOs) into the Thames Tideway.
Volume 1 – Objectives Working Group Report – Open this document
Report to establish a series of objectives to meet the broad aspirational aim.
Volume 1 – Solutions Working Group Report – Open this document
Contribution of the Solution Group to the strategic investigation of the Tideway Combined Sewer Overflow (CSO) discharges.
Volume 2 – Objectives Working Group Modelling Study – Open this document
Modelling study to assess the proposed solutions developed by the Solutions Group against the objectives for dissolved oxygen in the Tideway.
Volume 2 – Solutions Working Group Refinement Report - Open this document
The refinement of the scope of the storage tunnel option including re-evaluation of the cost estimates and risk assessment.