S0407 M0019 S0046 S0036 North M OS TO 401000 N BR OOK S0048 Salford S0034 S0038 L S0045 ANA M0009 LE C B S0040 HDA A ROC M0036 S0031 K C S0039 O O R B Manchester N O T S0059 S O M S0058 S0054 Trafford S0062 S0064 D M0013 M0003 S0056 S0065 S0069 400000 S0067 S0053 S0066 M0004 S0068 S0068 M0021 S0001 S0067 Council Boundary Ashton, Bridgewater and Rochdale Canals S0057 Canal Overtop Hazard Zone Manchester Ship Canal S0385 / Grey Irwell Canal Overtop Hazard Zone Other Waterbodies S0060 S0070 Canal Breach Hazard Zone S0055 S0399 Main Rivers (V8.0) IRWELL Canal Breach Zone A Culverted S0090 Canal Breach Zone B Open IRK M0008 S0088 Oldham SFRA Canal Hazard Zone S0086 S0091 Digitised River Lines Potential Development Sites / Locations Culverted S0087 Employment S0089 S0420 Open 399000 S0077 S0075 S0084 S0419 Housing S0418 S0371 S0076 S0078 S0424 S0422 S0413 M0005 S0071 S0423 K Mixed Use LOC S0074 S0072 MED S0083 S0110 S0417 Other S0429 S0372 S0079 S0085 M0002 Regional Centre Boundary S0096 S0081 S0092 S0108 This map has been produced in accordance with PPS25: Development and Flood Risk. S0093 M0024 S0425 S0082 S0073 S0095 S0080 Two indicative "Canal Hazard Zones" have been created for the Bridgewater, Ashton and Rochdale M0040 S0104 Canals. These have been generated using broadscale 2D modelling to show areas that could S0106 S0098 S0103 S0105 potentially be affected by flooding in the event of S0172 S0100 •Canal Overtop Hazard Zone S0380 S0107 •Canal Breach Hazard Zone. S0391 S0428 S0099 S0427 S0174 S0097 The potential breach locations / areas were sub-divided into two Canal Breach Zones: •Canal Breach Zone A. A walkover survey of the canal was undertaken to identify the embankments S0414 more likely to breach, based on their height and width. This zone shows those areas that would be S0393 affected by a breach of one of these embankments. In this zone a detailed examination of canal breach flood risks is required in a site specific FRA. S0101 •Canal Breach Zone B. Less likely breach locations, such as at wide, low or very low embankments, S0102 were identified by a walkover survey of the canal. At such locations it is more likely that this source of S0426 ASH L TON L CAN S0375 S0109 E AL risk could be scoped out within any site specific FRA. W R I Y E R M0026 It should be noted that these outlines are based on broadscale modelling techniques and G should only be taken as an indication of areas that might be at risk and inform Flood Risk 398000 Assessments. There are a number of uncertainties associated with the simulation of flooding from canals in either overtopping or breach conditions. The assumptions behind the modelling should be considered when using and reviewing the hazard zones that have been produced. Full details of the methodology used to derive Canal Hazard Zones is provided in Chapter 3 of the Level 2 SFRA and S0111 guidance on the use of the Canal Hazard Zones is provided in Chapter 3 of the SFRA User Guide. M0001 The Canal Hazard Zone resulting in a breach from the Rochdale Canal in Oldham has also been included on the map and has been taken from the Oldham SFRA (2010). This was based on a similar broadscale methodology. ME DL OC K T Interactions between the Bridgewater Canal and the River Medlock in Castlefield may result in U L N A N overtopping of the Canal during severe weather events, as shown elsewhere in the SFRA. E N L A S S0005 C P For further information please see the Level 2 SFRA Chapter 3. S0392 I H S S0113 R The Main River information shown in the SFRA is provided by the Environment Agency; the centreline E T S data may deviate from that shown on basemapping due to inherent differences in data resolution. E M0025 H S0116 C L Further information on Main Rivers is provided on the Environment Agency’s website. The mapping N A A N M A of culverted sections of watercourse is a strategic screening only based upon Ordnance Survey C R 1:10,000 mapping and should be confirmed for more detailed studies such as site specific Flood Risk E T M0037 A W Assessment. The canals layer does not necessarily cover all the canal arms, but the modelled T0467 E G overtopping/breaching and hydraulic interactions with rivers and other waterbodies is complete and ID R B accurate as appropriate for a Strategic Flood Risk Assessment. The River Irwell between Victoria Station and Pomona Island is not shown as a Main River on the Environment Agency's Flood Map although Flood Zones related to the river are. The same approach has been taken in this SFRA. The map should be considered when applying the Sequential Test and used to scope the inclusion of COR canal flood risk within a site specific FRA. N BROOK 397000 M0011 M0010 www.jeremybenn.co.uk T0322 t 01925 570876 M0042 f 0845 8627772 e [email protected] Bank Quay House Sankey Street Warrington T0167 WA1 1NN United Kingdom T0158 T0435 Other offices at Atherstone, Doncaster, Edinburgh, Haywards Heath, Limerick, Newcastle upon Tyne, Newport, Northallerton, Saltaire, Skipton, Tadcaster & Wallingford T0165 M0012 for Manchester City, Salford City and Trafford T0468 T0233 Councils Level 2 Hybrid SFRA T0162 M0032 Canal Hazard Zones T0235 Drawn by: Date: This map is based upon Ordnance Survey material with the 396000 J Cheetham 15/03/2011 T0440 T0320 permission of Ordnance Survey on behalf of the Controller T0227 Checked by: Date: of Her Majesty's Stationery Office © Crown copyright. J Dimelow 01/02/2011 Unauthorised reproduction infringes Crown copyright and T0146 may lead to prosecution or civil proceedings. Licence Approved by: J Cooper Date: 01/02/2011 number: 100019568 2011. GORE T0151 T0160 LATT ON P File Name: RLT ...ArcView\Mapping\Level2\MST_Canal_Hazard_V1.3.mxd CHO Drawing Number: Status: Scale: T0438 0 0.5 1 M0027 Kilometre M0029 0 0 0 0 0 0 0 MM_3.2B FINAL 1:10,000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 4 5 6 7 8 9 8 8 8 8 8 8 8 T0226 3 3 3 3 3 3 3 Original @ A1.