19 A framework for the production of Drainage and Wastewater Management Plans Appendix E Case studies Commissioned by Water UK in collaboration with Defra, Welsh Government, Ofwat, Environment Agency, Natural Resources Wales, Consumer Council for Water, ADEPT and Blueprint for Water September 2018 Report commissioned by Water UK in collaboration with Defra, Welsh Government, Ofwat, Environment Agency, Natural Resources Wales, Consumer Council for Water, ADEPT and Blueprint for Water Notice This document and its contents (including all associated appendices) have been prepared for Water UK. All information contained in this document and associated appendices is made available without responsibility or liability of any nature (including in negligence) on the part of Atkins Limited, and is not to be relied upon as a statement or representation of facts. Atkins Limited does not make or give, nor has any person authority on its behalf to make or give, any representation or warranty whatever in relation to the contents of this document. 3 E.1. Introduction In defining the DWMP framework, the Three case studies are provided as following planning areas have been defined: examples that demonstrate how current practice is applicable to This appendix supplements the > Level 3 (L3) tactical planning unit the DWMP framework: information provided within the (TPU) – the basic TPU will be the framework document for drainage wastewater treatment works (WwTW) > Strategic context - Thames Water, and wastewater management and its catchment (or aggregations London 2100: the case for change plans (DWMPs). The main document thereof for small catchments, or discrete (section E.2) sub-catchments for larger (and appendices) aim to provide > Collaborative drainage and WwTW catchments). water and sewerage companies wastewater planning: > Level 2 (L2) strategic planning areas (hereinafter referred to as • Northumbrian Water, integrated (SPAs) – an aggregation of L3 units into ‘companies’ or variations thereof), drainage partnerships (section E.3) larger L2 SPAs. operating within England and Wales, • Yorkshire Water, strategic level with a framework within which > Level 1 (L1) water company DWMP – engagement (section E.4) DWMPs can be developed. The planning at L2 and L3 to be brought together within an overarching company The case studies relate to the initial DWMP framework is also expected framework process steps and the to be of relevance to other parts of level DWMP to provide a strategic, long- term plan for drainage and wastewater establishment of an appropriate the UK. resilience and associated investment over management structure. It can be expected the plan period. that as companies progress through the process steps for the ‘first iteration’ For consistency the same terminology DWMPs, other case studies can be The authors of the report would like to as used in the main report is used in the developed, highlighting good/best thank the following for providing the case case studies. practice. The case studies should be read studies in this appendix: in the context of the DWMP approach. > Thames Water: Astrid Colquhoun > Northumbrian Water: James MacLean > Yorkshire Water: Deborah Redfearn 4 E.2. Strategic context case E.2.2. What were the objectives? E.2.3. What issues have E.2.4. How was this been addressed? challenge approached? study - Thames Water, London The primary objectives for 2100: the case for change London 2100 are: London is seeing a rising demand for An internal case was made to review the wastewater services in response to rapid strategic planning approaches to > To communicate and gain internal E.2.1. Introduction population growth, climate change and wastewater services, looking beyond acceptance of the idea that continuing urban creep. These challenges are current investment cycles. A London 2100 Thames Water has been developing an the existing approach to investment expected to continue into the future. team was established in April 2017 to work approach for the strategic long-term would not be possible. Hence the ‘Case with existing infrastructure and non- planning of wastewater services in London, for Change’. The assets that service this demand are infrastructure teams within Thames Water. called London 2100. It has used the guiding ageing, with asset deterioration ultimately > To engage with stakeholders and bring The team used the existing Water principles of the Drainage Strategy impacting on capacity. A number of them on board with being part of the Resource Management Plan (WRMP) Framework and aligned with the emerging strategic wastewater treatment sites are team to develop solutions. model as a framework to develop a 21st Century Drainage Programme. ‘land-locked’ or have very limited potential focussed strategic plan for London’s > To develop a framework to allow ‘blue- for future expansion2. The pace of change By examining the strategic context for wastewater services. A risk-based sky’ ideas to be generated which will and potentially long lead in times for wastewater services in London, assessing approach was used to enable the company contribute to the overall solution constructing new assets to address needs the drivers for future change and modelling to adopt a proportional approach to plan in London. has meant that the ‘business as usual potential future scenarios, Thames Water operational and investment activities approach’ to dealing with growth and has been able to establish and evidence a > To ensure that the process developed depending on the probability and quality drivers is no longer appropriate. ‘case for change’ for how it plans to for creating a plan can be rolled out consequence of inadequate network and futureproof London’s wastewater assets across the whole Thames region. Furthermore, there is a regulatory treatment provision over 25 to 80-year against the uncertainties of the future. expectation that wastewater planning planning horizons. should be undertaken at a strategic The “London 2100 Case for Change” To develop the approach, the following level, similar to that for water document1 states: “The challenge for activities were undertaken: resource planning1. London 2100 is clear: how do we plan > Research to explore the principal effective, efficient and resilient wastewater These issues have prompted a focussed, drivers for change. services in London in the face of a highly strategic approach to address both short uncertain future?” and long-term planning needs for the > A futurology workshop to develop provision of drainage and wastewater scenarios of what the future could look In making this case for change, Thames services in London. like, particularly with respect to Water has engaged with a wide range of social trends. stakeholders to explain the need for longer-term planning of wastewater > Strategic analysis to provide a high- services and the importance of level view of the baseline position partnership working and delivery. across London’s infrastructure and non-infrastructure assets. 1 London 2100 Case for Change, Thames Water https://www.thameswater.co.uk/-/media/Site-Content/Thames-Water/London2100/London-2100-Case-for-change.pdf 5 > Development of metrics. These have Support for the London 2100 Project has E.2.5. Understanding and To consider the future worlds in which been taken from the Capacity been established internally though developing the strategic context Thames Water may be operating, the Case Assessment Framework and the Thames Water’s alliance partners and the for Change document sets out four Wastewater Resilience Metrics work creation of a steering group. External The first step in understanding and possible, and plausible, scenarios. For the of the 21st Century Drainage support has also been provided through developing the strategic context was to purposes of solution optioneering, the Programme. One or more additional an Independent Advisory Group to oversee ensure that the future drivers for change actual future world may more likely be a metrics are under consideration. and provide feedback on the work. The were fully understood, in order to explain hybrid of all of these or may be completely Independent Advisory Group is provided the problems faced and the need for a different. It may even vary across the > Optioneering; following the broad by Cranfield University with the four panel change in approach to planning geographical region. Nevertheless, the approach utilised for water resources members being taken from both UK and wastewater services. This was reinforced future world’s concept has provided a planning, a generic options shortlist international university institutions. The to others through demonstrating why useful context within which to consider has been developed at the time of London 2100 team have also developed, longer term strategic planning works in potential solutions and how Thames Water writing. The options are grouped partnerships with key academic institutes other business areas (e.g. might go about developing an adaptive depending on whether they can be (e.g. Imperial College, University College water resources). plan in response to uncertain applied across the whole of London, London) who are able to provide the future drivers. at a named catchment level, or have A framework has been developed that expertise in areas of planning for future multi-stakeholder elements which shows how the ‘Case for Change’ fits into The four scenarios are: worlds and decision making under great require a collaborative approach with the wider process