Level 2 Strategic Flood Risk Assessment (.pdf ... - Wigan Council

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included so that the Council may consider variations to surface water management, butdoesn’t imply acceptance or even negate the need for alternatives to be fully investigated.The Council has stressed the need for sustainable surface water management as part ofall development proposals.Flood Warning Codes (Page VIII)The new flood warning codes will only be used from the end of November. However,these have been updated in the User Guide in accordance with the EA’s website and nowread:Flood AlertFlooding is possible. Be prepared.Flood WarningFlooding is expected.required.Immediate actionSevere Flood WarningSevere flooding. Danger to life.3) Flood Mapping Set A - Flood Zone MapsThe digital GIS files showing the various flood zones are provided to the Council andhave been agreed as final. The GIS layers can therefore be displayed by the user in anycolour or zoom level to allow greater differentiation on screen if required. Therefore nochange is proposed.We trust this letter addresses all your concerns and we do not anticipate any furtherchanges beyond those discussed above. We will therefore issue the Final version of ourSFRA and issue one hard copy to yourselves for your records.Yours faithfully,For Jeremy Benn Associates LimitedPPHoward KeebleProject Managerhoward.keeble@jbaconsulting.co.uk2009s0578-S-L005-1.doc 4/419 November 2010www.jbaconsulting.co.uk
Wigan Metropolitan Borough CouncilCivic Buildings (4) New Market StreetWiganLancashireWN1 1RPOur ref:01/IS2-L01Your ref:SO/2006/000257/SF-Date: 08 December 2010FAO: Damian GarnerDear DamianDRAFT STRATEGIC FLOOD RISK ASSESSMENTThank you for referring the correspondence and emails from Jeremy Benn AssociatesLtd in response to the previous comments made by the Environment Agency on theabove document.We would like to make the following comments in response to the issues raised.1) Level 2 SFRA ReportDevelopment Behind Defences Current Condition of Flood DefencesJBA have confirmed that a condition assessment of flood defence infrastructure has notbeen undertaken. We would refer the Council to paragraph 2.7 (a) of the SFRA briefwhich states that the SFRA should contain the following as a minimum:“A schedule of the current condition of flood defence infrastructure, both formal andinformal, cross-referenced to specified policies in the Environment Agency’s RiverDouglas CFMP and Mersey Estuary CFMP with regard to maintenance and upgrade.Supporting material for the schedule to be provided by the consultant will include walkoversurvey records, as-build records where available, a directory of photos, andlocation plans”.We feel that this information is important to inform future development within theborough of Wigan. Currently the SFRA does not achieve this objective of the brief. Likely Future Flood Management PolicyEnvironment AgencyAppleton House, 430 Birchwood Boulevard, Birchwood, Warrington, Cheshire, WA3 7WD.Customer services line: 08708 506 506Email: enquiries@environment-agency.gov.ukwww.environment-agency.gov.ukCont/d..
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Wigan Borough Hybrid SFRAVolume I:
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JBA OfficeJBA ConsultingSouth BarnB
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AcknowledgmentsJBA would like to ac
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Understanding flood risk from a pla
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8.3 Planning considerations........
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AbbreviationsABDAreas Benefiting fr
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The key objectives of a SFRA are to
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2 Flooding from RiversA detailed as
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1. Astely Brook2. Bedford Brook3. W
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Unique ID Watercourse Description L
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2.7 Understanding flood risk from a
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For example, flooding may affect ke
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3 Flooding from CanalsThe SFRA has
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3.2.2 Canal breach methodologyCanal
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4 Flooding from ReservoirsFollowing
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direction in Future Water3, Making
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oundaries. Nine key CDAs have been
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CDA Sites Site TypeLark Hill, Astle
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particular hotspots where surface w
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important role to play in reducing
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In the reverse situation, where flo
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8 Summary of riskA summary of flood
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Having followed this procedure it i
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9 Outline Mitigation OptionsChapter
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Water-resistant materials for floor
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JBA Consulting - Engineers Scientis
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JBA Consulting - Engineers Scientis
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Table B-1: Flood Risk Balance Sheet
Page 57 and 58: Map Name Map Reference Map Title De
Page 81 and 82: D . Wigan Council - Data RegisterXX
Page 83 and 84: E . SUDs SuitabilityNew SiteReferen
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Page 87 and 88: New SiteReferenceWig 855Wig 857Wig
Page 91 and 92: New SiteReferenceWig 716Wig 706BSit
Page 97 and 98: Site Reference Site Location Soil T
Page 99 and 100: F . Flood Zone 3 Proposed Developme
Page 101 and 102: G . Environment Agency comments on
Page 103 and 104: Flood Hazard MappingThe Level 2 rep
Page 105 and 106: Planning LiaisonEnvironment Agency
Page 107: Guide makes further summation diffi
Page 111 and 112: of the extent of any works required
Page 113 and 114: Planning & Transport StrategyWigan
Page 115 and 116: Again, avoiding generalities, we ha
Page 117 and 118: EA comment:Guidance on the preparat
Page 119 and 120: Please give me a call to discuss wh
Page 121 and 122: RECORD OF MEETINGStatus:JBA Project
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Level 2 Strategic Flood Risk Assessment (.pdf ... - Wigan Council

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