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

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Design <strong>Flood</strong> EventFluvial Depths (m)Surface water Depths (m)Estimatedminimumdepth (m)Estimatedmaximumdepth (m)Estimatedmeandepth (m)Estimatedminimumdepth (m)Estimatedmaximumdepth (m)Estimatedmeandepth (m)Wig 161 1.3% (1 in 75) 0 2.2 0.5 0 1.1 01% (1 in 100) 0 2.2 0.50.5% (1 in 200) 0 2.2 0.4 0 1.3 00.1% (1 in 1000) 0 2.4 0.5 0 2.1 0.1Wig 655 1.3% (1 in 75) --- --- --- 0 0 01% (1 in 100) --- --- ---0.5% (1 in 200) --- --- --- 0 0 00.1% (1 in 1000) --- --- --- 0 0 0Wig 047 1.3% (1 in 75) --- --- --- 0 0.1 01% (1 in 100) --- --- ---0.5% (1 in 200) --- --- --- 0 0.1 00.1% (1 in 1000) --- --- --- 0 0.2 0Wig 140 1.3% (1 in 75) --- --- --- 0 0.2 01% (1 in 100) --- --- ---0.5% (1 in 200) --- --- --- 0 0.2 00.1% (1 in 1000) --- --- --- 0 0.4 0.1Wig 137 1.3% (1 in 75) 0 3.6 0.4 0 0.9 01% (1 in 100) 0 3.7 0.40.5% (1 in 200) 0 3.7 0.4 0 1.9 0.10.1% (1 in 1000) 0 3.7 0.4 0 3.5 0.2Wig 695 1.3% (1 in 75) 0 1.7 0.3 0 0.1 01% (1 in 100) 0 1.7 0.30.5% (1 in 200) 0 1.7 0.3 0 0.4 00.1% (1 in 1000) 0 1.8 0.4 0 1.8 0.1Wig 694 1.3% (1 in 75) --- --- --- 0 0.5 0.11% (1 in 100) --- --- ---0.5% (1 in 200) --- --- --- 0 0.6 0.20.1% (1 in 1000) --- --- --- 0 0.7 0.2Wig 740 1.3% (1 in 75) 0 2.7 0.6 0 1.3 01% (1 in 100) 0.1 2.8 0.60.5% (1 in 200) 0 2.9 0.7 0 2 00.1% (1 in 1000) 0 3.1 0.8 0 3.5 0.3Wig 131 1.3% (1 in 75) 0 3.5 1 0 1.8 01% (1 in 100) 0 3.6 0.90.5% (1 in 200) 0 3.7 0.6 0 2.4 0.10.1% (1 in 1000) 0 4 0.7 0 4.1 0.2Wig 060 1.3% (1 in 75) --- --- --- 0 0.9 0.11% (1 in 100) --- --- ---0.5% (1 in 200) --- --- --- 0 1.1 0.10.1% (1 in 1000) --- --- --- 0 1.3 0.1Wig 657 1.3% (1 in 75) 0 1 0.4 0 0.4 0.11% (1 in 100) 0 1 0.40.5% (1 in 200) 0 1.1 0.4 0 0.6 0.10.1% (1 in 1000) 0 1.2 0.5 0 0.9 0.3Wig 125 1.3% (1 in 75) 0 1.8 1.1 0 0.8 0.31% (1 in 100) 0 1.8 1.20.5% (1 in 200) 0 2.1 1.4 0 1.2 0.80.1% (1 in 1000) 0.2 2.3 1.7 0 2 1.5Wig 706A 1.3% (1 in 75) 0 2.1 1 0 1 0.21% (1 in 100) 0.1 2.2 1.10.5% (1 in 200) 0.3 2.4 1.3 0 1.5 0.60.1% (1 in 1000) 0.6 2.5 1.6 0.5 2.3 1.4
G . Environment Agency comments on <strong>Wigan</strong>SFRA with responses from JBAXLIX
Page 1 and 2:
Wigan Borough Hybrid SFRAVolume I:
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JBA OfficeJBA ConsultingSouth BarnB
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AcknowledgmentsJBA would like to ac
Page 7 and 8:
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
Page 21 and 22:
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
Page 27 and 28:
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
Page 49 and 50: Water-resistant materials for floor
Page 51 and 52: JBA Consulting - Engineers Scientis
Page 53 and 54: JBA Consulting - Engineers Scientis
Page 55 and 56: 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
Page 85 and 86: New SiteReferenceWig 354Site Addres
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: F . Flood Zone 3 Proposed Developme
Page 103 and 104: Flood Hazard MappingThe Level 2 rep
Page 105 and 106: Planning LiaisonEnvironment Agency
Page 107 and 108: Guide makes further summation diffi
Page 109 and 110: Wigan Metropolitan Borough CouncilC
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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