SFRA Appendix 2 Sequential Test
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Appendix 2 - Sequential Test for Sites outside of Flood Zone 1. 19 SFRA2: Callywith Urban Extension, Bodmin (Bd-UE4) Flood Zone 2 Encroaches along the southern edge of the site Flood Zone 3a Encroaches along the southern edge of the site Flood Zone 3b Encroaches along the southern edge of the site Critical Drainage Areas Most of the site within Bodmin Town Leat Critical Drainage Area Shoreline Management Plan No data within map extent designation Flood Map for Surface Water The site is almost entirely in a Critical Drainage Area. There are no surface water features present on site. Hydrology assessment of site’s The northern fringe of this site drains to surface water issues Clerkenwater, away from Bodmin, but the majority of the site drains to the Flaxmoor Stream and ultimately to the Town Leat - it is within the Bodmin Critical Drainage Area. Key requirements for satisfying the Sequential Test and Exception Test Built development will be located wholly within Flood Zone 1, avoiding the Flood Zone on the southern boundary. Policy recommendations SuDS are likely to be infiltration based or with surface attenuation features (ponds) 20 leading southward across the site to the Flaxmoor Stream. Surface water drainage will need to be designed in accordance with the SUDS principles and standards set out in the Drainage Guidance for Cornwall to ensure surface water run-off from development is managed appropriately so that flood risk is not increased. Consideration of alternative sites Not required as development can be directed to Flood Zone 1. Sequential test passed? Yes Exception Test required No 21 SFRA2: Parkengue, Falmouth (FP-M2) Flood Zone 2 Cuts through the site with an additional area to the south east of the site Flood Zone 3a Cuts through (approx. less than 20%) of the site Flood Zone 3b Cuts through (approx. less than 20%) of the site Critical Drainage Areas Whole site within The College Stream Critical Drainage Area (see legend on top map) Shoreline Management Plan No data within map extent designation Flood Map for Surface Water There is a small area in the middle of the site that has been affected by surface water flooding Hydrology assessment of site’s An area of flood zone cuts through the surface water issues middle of the site, with evidence of surface water flooding within a small area of this. Key requirements for satisfying the Sequential Test and Exception Test As flood Zones 2 and 3 are approximately less than 20% of the site, built development will be able to be located wholly within Flood Zone 1. Policy recommendations Development and redevelopment should be directed outside of the Flood Zones which cut through the site. Surface water drainage will need to be designed in accordance with the SUDS principles and standards set out in the Drainage Guidance for Cornwall to ensure 22 surface water run-off from development is managed appropriately so that flood risk is not increased, either in the immediate area or further downstream along the College and Glasney Valleys. Consideration of alternative sites Not required as approximately less than 20% of the site is an area of flood risk, with development focused outside of this. Sequential test passed? Yes Exception Test required No 23 SFRA2: Treliever (FP-M3) Flood Zone 2 The southern edge of the site borders, and in places overlaps, Flood Zones 2 Approx. under 5% of site Flood Zone 3a The southern edge of the site borders, and in places overlaps, Flood Zones 3a. Approx. under 5% of site Flood Zone 3b The southern edge of the site borders, and in places overlaps, Flood Zones 3b. Approx. under 5% of site Critical Drainage Areas Whole site within Critical Drainage Area Shoreline Management Plan No data within map extent designation Flood Map for Surface Water The area in flood zones 2 and 3 coincides with a risk of surface water flooding Hydrology assessment of site’s The site contains an area of flood zone to surface water issues the south. There is evidence of surface water flooding in the southern areas of the site coinciding with flood zones. Key requirements for satisfying the sequential test and exception test As flood Zones 2 and 3 are less than 5% of the site, built development will be able to be located wholly within Flood Zone 1. Safe access to the site will need to be ensured if access is sought from the roundabout or road parallel to the southern site boundary. The blue/green infrastructure corridor through the southern area of the site must be protected. 24 Policy recommendations Development should be directed outside of the Flood Zone to the south of the site. This area of Flood Zone is at the lowest point of the site and levels in this location might preclude built development, with access from the road being via a bridge over the lower levels to the higher ground outside of the Flood Zone. The blue/green infrastructure corridor through the southern area of the site must be protected. Safe access to the site will need to be ensured if access is sought from the roundabout or road parallel to the southern site boundary Surface water drainage will need to be designed in accordance with the SUDS principles and standards set out in the Drainage Guidance for Cornwall to ensure surface water run-off from development is managed appropriately so that flood risk is not increased. Consideration of alternatives Not required as less than 5% of the site is an area of flood risk, with development focused outside of this. Sequential test passed? Yes Exception Test required No 25 SFRA2: Treliever (Direction of Growth) (FP-M4) Flood Zone 2 The southern edge of the site borders, and in places overlaps, Flood Zones 2 Approx. under 5% of site Flood Zone 3a The southern edge of the site borders, and in places overlaps, Flood Zones 3a. Approx. under 5% of site Flood Zone 3b The southern edge of the site borders, and in places overlaps, Flood Zones 3b. Approx. under 5% of site Critical Drainage Areas Whole site within Critical Drainage Area Shoreline Management Plan No data within map extent designation Flood Map for Surface Water The area in flood zones 2 and 3 coincides with a risk of surface water flooding. Also surface water flooding in an area in the centre of the site. Hydrology assessment of site’s The site contains an area of flood zone to surface water issues the south. There is evidence of surface water flooding in the southern areas of the site and in an area in the centre of the site. Key requirements for satisfying the sequential test and exception test As flood Zones 2 and 3 are less than 5% of the site, built development will be able to be located wholly within Flood Zone 1. Safe access to the site will need to be ensured if access is sought from the roundabout or road parallel to the southern site boundary. 26 The blue/green infrastructure corridor through the southern area of the site must be protected. Policy recommendations Development should be directed outside of the Flood Zone to the south of the site. This area of Flood Zone is at the lowest point of the site and levels in this location might preclude built development, with access from the road being via a bridge over the lower levels to the higher ground outside of the Flood Zone. The blue/green infrastructure corridor through the southern area of the site must be protected. Safe access to the site will need to be ensured if access is sought from the roundabout or road parallel to the southern site boundary Surface water drainage will need to be designed in accordance with the SUDS principles and standards set out in the Drainage Guidance for Cornwall to ensure surface water run-off from development is managed appropriately so that flood risk is not increased. Consideration of alternatives Not required as less than 5% of the site is an area of flood risk, with development focused outside of this. Sequential test passed? Yes Exception Test required No 27 SFRA2: Kernick Road Industrial Estate, Falmouth (FP-E1) Flood Zone 2 Cuts through the site Flood Zone 3a Cuts through the site Flood Zone 3b Cuts through the site Critical Drainage Areas Whole site within The College Stream Critical Drainage Area Shoreline Management Plan No data within map extent designation Flood Map for Surface Water Surface water flooding evident within the site Hydrology assessment of site’s The site is already built and surface water issues accommodates Kernick Road Industrial Estate. Flood Zone 2, 3a and 3b cut through the site and it is also fully within a Critical Drainage Area. Should redevelopment or additional development take place within this site a sequential approach to development will be needed with built development outside of the Flood Zone. Key requirements for satisfying the Sequential Test and Exception Test Built development/redevelopment must be located wholly within Flood Zone 1 and avoid the area of Flood Zone. Policy recommendations Flood Zone 2, 3a and 3b cut through the site and the entire site is within a Critical Drainage Area. 28 A sequential approach to any development will be needed, with new built development outside of the Flood Zone. Surface water drainage will need to be designed in accordance with the SUDS principles and standards set out in the Drainage Guidance for Cornwall to ensure surface water run-off from development is managed appropriately so that flood risk is not increased. Consideration of alternative sites Not required as development will be able to be located wholly within Flood Zone 1.