East Cambridgeshire District Council Water Cycle Study Detailed ...

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Cambridgeshire Horizons East Cambridgeshire – Detailed WCS 5.5 Climate Change Analysis............................................................................................ 105 5.6 Financial cost of SuDS ............................................................................................... 114 5.7 Best Practice Examples.............................................................................................. 115 5.8 Adoption and maintenance of SuDS ........................................................................... 116 5.9 Conclusions................................................................................................................ 119 5.10 Recommendations...................................................................................................... 119 6 Potential Growth Area Infrastructure requirements ................. 120 6.1 Ely Potential Development Areas................................................................................ 121 6.2 Soham Potential Development areas.......................................................................... 123 6.3 Littleport Potential Development Areas....................................................................... 125 6.4 Bottisham Potential Development areas ..................................................................... 127 6.5 Burwell Potential Development areas ......................................................................... 128 7 Water Cycle Strategy Recommendations and Policy ............... 130 7.1 Policy Recommendations Overview............................................................................ 130 7.2 Climate Change and the Water Cycle – Adaptation .................................................... 132 7.3 Developer Guidance................................................................................................... 133 7.4 Further Recommendations ......................................................................................... 133 Appendices............................................................................................. 135
Executive Summary Stage 2 Water Cycle Study: Final Report Sept 2011 1 Cambridgeshire Horizons East Cambridgeshire – Detailed WCS The district of East Cambridgeshire is expected to experience a significant increase in housing and employment provision over the period to 2031. This growth represents a challenge in ensuring that both the water environment and water services infrastructure has the capacity to sustain this level of growth and development proposed. A joint Outline Water Cycle Study (WCS) was completed with Fenland District to determine constraints that may be imposed by the water cycle in both districts. A further Detailed (Stage 2) WCS has been completed for East Cambridgeshire based on preferred broad growth areas identified in the Council’s adopted Core Strategy, and a number of potential areas identified in the Ely, Soham and Littleport Masterplans. This information has been used to determine how the water cycle constraints identified in the Outline WCS may relate to potential development sites within the settlements, if and how the constraints can be resolved and how they may impact on phasing of development over the plan period. Furthermore, it provides a more detailed suggested approach to the management and use of water which demonstrates ways to ensure that the sustainability of the water environment in the study area is not compromised by growth. A Detailed Water Cycle Strategy is presented for the District as a whole and for each of the main growth settlements. The Wastewater Strategy Wastewater Treatment The Detailed study has shown that several Wastewater Treatment Works (WwTWs) have capacity to accept wastewater flow from proposed growth without the need for improvements to treatment infrastructure. This is the case for Isleham, the Newmarket fringes, Stretham, Wilburton, Ely and Mepal. Growth is not constrained by wastewater treatment in these locations. At the remaining WwTWs, improvements are required in order to accommodate the growth to ensure that the increased wastewater flow discharged does not impact on the current quality of the receiving watercourses, their associated ecological sites and also to ensure that the watercourses can still meet with legislative requirements. The improvements required at WwTWs in Soham, Haddenham, Witchford, Littleport, Little Downham and Witcham are achievable over the plan period within the limits of conventionally applied technology and hence, a solution can be implemented to allow growth in these catchments to proceed. Initial development may need to be restricted whilst improvements are implemented at these works, but assuming upgrades are completed, there should be no restriction on growth in the medium to long term in these locations as a result of wastewater treatment capacity. However, the detailed assessments have shown that improvements beyond conventionally applied technology are required at both Burwell and Bottisham WwTW (due to water quality). Early phasing of development in these locations may need to be restricted until solutions are developed. The WCS has concluded that the study partners, including East Cambridgeshire District Council, the Environment Agency, the Ely Group of Drainage Boards and Anglian Water should work together to determine if any of the potential solutions proposed in the Detailed study are acceptable and hence conclude when and how much development can be accommodated in Burwell and Bottisham. In all cases, the assessments have shown that the ability of watercourses to meet future water quality targets (Good Status) under the Water Framework Directive will not be compromised by growth alone and
Page 1 and 2: East Cambridgeshire District Counci
Page 3: Table of Contents Cambridgeshire Ho
Page 7 and 8: Stage 2 Water Cycle Study: Final Re
Page 9 and 10: Surface Water Drainage Management S
Page 11 and 12: SWM5 - Linkages to SWMP and SFRA St
Page 13 and 14: Glossary of Acronyms and Abbreviati
Page 15 and 16: Abbreviation Description RTPI Royal
Page 17 and 18: 1.3 Stage 2 - Study Governance Stag
Page 21 and 22: • Surface Water Management Plan f
Page 23 and 24: 2 Proposed Growth 2.1 Preferred Gro
Page 25 and 26: 2.3 Employment Stage 2 Water Cycle
Page 27 and 28: Figure 2-1: Potential development s
Page 29 and 30: Relevant WwTW Stage 2 Water Cycle S
Page 33 and 34: WwTW Soham Burwell Bottisham Hadden
Page 36 and 37: 3.2.2 Results Discussion WwTW Soham
Page 38 and 39: WwTW Consent parameter Stage 2 Wate
Page 46 and 47: Table 3-7: Potential Impact of Clim
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Stage 2 Water Cycle Study: Final Re
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3.4.1 Stage 2 network assessment re
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Site Description of potential waste
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Site Description of potential waste
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Bottisham Site Assessment Site Desc
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Impact on Supplies Stage 2 Water Cy
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Low flow taps and showers Stage 2 W
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Figure 4-1: A typical domestic rain
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Medium Scenario The key assumptions
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Table 4-7: Details of new Build Spe
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WN Scenario New development Water u
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Operation of GWR £30 per annum 82
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Table 4-12: Estimated Cost of Neutr
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Figure 4-3: CO2 emissions from a
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4.4.7 Preferred strategy - delivery
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5 Surface Water Management 5.1 The
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• continuous surfaces with an inh
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5.5.1 Ecological opportunities Ely
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Site Stage 2 Water Cycle Study: Fin
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5.5.7 SuDS and groundwater protecti
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Lisle Lane, Ely 2.855 2.28 1,038 -
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Land rear of Fordham Road, Soham 2.
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6.3.3 Wastewater Network constraint
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6.4.4 Phasing Assessment Phase Dwel
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7.2 Climate Change and the Water Cy
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Directive/Legislation/Guidance Desc
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Key Additional development can be a
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Consents to achieve ‘Good Status
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MASS BALANCE CALCULATION: MONTE CAR
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LITTLEPORT STW Current Quality Cons
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HADDENHAM STW Current Quality Conse
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Sequencing Batch Reactor Stage 2 Wa
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Tertiary treatment Stage 2 Water Cy
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East Cambridgeshire WCS Flood Estim
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11 12 12 Is the discharged water on
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37 38 40 41 42 A) Have you provided
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East Cambridgeshire District Council Water Cycle Study Detailed ...

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