London Borough of Bexley Local Flood Risk Management Strategy Action Plan September 2015 Actions Partners Costs Range ID Action Name Ward Action description Other RMAs Other Non RMAs Borough wide - study as part of 5 borough group to improve and BX- formalise understanding of areas at risk of groundwater flooding Partnership, 1 Groundwater ALL within the London Borough of Bexley. Provide local groundwater Less than 100K BGS EA Risk Map flood risk map linked to conditions that result in flood risk to particular areas. Borough wide - review of existing groundwater monitoring sites BX- (boreholes) in relation to areas at risk within London Borough of Partnership, 2 Groundwater ALL Less than 100K BGS Bexley. Consider locations of additional sites. Review telemetry EA monitoring arrangements at existing and proposed sites. Borough wide - review the potential for area specific groundwater BX- flood warnings based on improved understanding, risk map and Partnership, 3 Groundwater ALL monitoring. Aim would be to establish Flood Warnings Direct style Less than 100K BGS EA warning flood warning areas and establish triggers for alert, warning and severe warning categories or similar. BX-Culvert TWUL, Blockage Borough wide - review residual risk of culvert blockage throughout 4 ALL Less than 100K Highways Risk non-main river. Authority Assessment Planning, Public BX-Borough Borough wide - ensure the incorporation of storage / infiltration or Highways Realm, Parks, 5 wide storage ALL 500K to 1M other FRM measures alongside other works where practical. Authority Residents and FRM associations Borough wide - maintain a strategy to ensure SuDs incorporated in in new developments and redevelopments by applying national, BX-Borough Planning, 6 ALL regional and local planning policies, supported by a borough wide 500K to 1M EA wide SuDS Developers education programme. This is particularly relevant in areas likely to derive the most benefit, such as Crayford and Bexley.
BX-Borough Borough wide - seek opportunities to intercept roof runoff into Planning, 7 wide runoff ALL gardens and promote the use of green and permeable coverings in Less than 100K Transport management gardens. Replace footways with permeable tarmac where practical.
BX-Wyncham Blackfen & Lamorbey / Study to improve and formalise understanding of areas at risk of 8 Stream Risk Less than 100K EA Riparian Owners Longlands / Sidcup fluvial flooding along the Wyncham Stream (ordinary watercourse). Map
Page 1 of 4 London Borough of Bexley Local Flood Risk Management Strategy Action Plan September 2015 Actions Partners Costs Range ID Action Name Ward Action description Other RMAs Other Non RMAs BX-Wyncham Review existing flood warning arrangements for River Shuttle and Stream Blackfen & Lamorbey / Wyncham Stream and options for extending these upstream on 9 Warning and 100K to 500K EA Riparian Owners Longlands / Sidcup Wyncham Stream (ordinary watercourse). Review need for Stream additional telemetry. Telemetry Look to enhance surface water drainage systems and performance BX-Wyncham Blackfen & Lamorbey / of Wyncham Stream, increasing protection to properties within the 10 100K to 500K EA Riparian Owners Stream SoP Longlands / Sidcup catchment. Aim to achieve a target of 1 in 70 year return period protection level. BX-Highway Drainage Review and identify improvements to drainage in Halfway Street and Highways 11 improvement Blackfen and Lamorbey Woodlands Avenue, Sidcup (as part of Wyncham Catchment Less than 100K Authority, EA s - Old Farm Study). Av Review potential for FRM measures in Berwick Crescent open BX-Review space (Sidcup) as modelling and flood records identify flooding potential for affects properties and highway in Berwick Crescent and Oaklands Highways 12 FRM in Blackfen and Lamorbey Avenue, Sidcup. Identify opportunities for river restoration and 100K to 500K Transport Authority, EA Berwick remediation of existing flood wall to improve biodiversity and flood Crescent storage in Hollyoak Wood Park.
BX-Review opportunities Review opportunities for storage in Parish Wood (Sidcup) and 13 Blackfen and Lamorbey 100K to 500K EA Parks for Storage in surrounding area. Parish Wood BX-Review FSA Review potential of joint opportunities for wetland/storage area at University of 14 opportunities Blackfen and Lamorbey University of Greenwich campus (Avery Hill) (as part of Wyncham less than 100k EA Greenwich Greenwich study) campus BX-Wyncham Review potential for joint policy with Bromley on upstream LB of 15 Stream FAS / Longlands management of Wyncham Stream and associated catchment, Less than 100K Riparian Owners Bromley, EA joint policy including opportunities for storage.
Page 2 of 4 London Borough of Bexley Local Flood Risk Management Strategy Action Plan September 2015 Actions Partners Costs Range ID Action Name Ward Action description Other RMAs Other Non RMAs BX-Review potential for Maintain King George's Field and Longlands Recreation Ground 16 FSA at King Longlands (Sidcup) as public open space to protect the functional flood storage Less than 100K EA Parks George's area they provide during extreme surface water flooding events. Field BX-Sidcup Major problems around the railway embankment and railway Network Rail, 17 railway Sidcup underpass. Explore opportunities linked to station access and 100K to 500K EA, Parks embankment upstream storage. BX-Hall Place EA, Pilot mapping of assets at Hall Place (Bexley) to include mapping 18 - asset Barnehurst / Crayford Less than 100K Highways Parks watercourses and asset register. mapping pilot Authority Extend integrated drainage study in Crayford to provide further BX-Crayford options assessment / development required to identify the most Integrated 19 Crayford effective scheme to reduce flood risk within Crayford. Ideally this 100K to 500k EA, TWUL Drainage scheme will increase the level of protection to at least a 70 year study/ SuDS return period. The identified scheme will then be implemented. Keep maintenance of Joyden's Wood (Bexley) drainage ditches BX-Joyden's under review - these are poorly maintained but results in some flood Wood storage potential. Should maintenance be instigated (either in EA, 20 drainage Cray Meadows Bexley or Kent) then review opportunities to introduce 'check-weirs' less than 100k Highways Parks ditches - to hold water back and slow response of catchment to rapid Authority Maintenance response events. Note Hurst Grid Sub Station downstream of wood. BX-High Review surface water flooding issues around Bexley Village, related Street Bexley to lack of permeable ground coverings resulting in excessive Highways 21 St. Mary's 100K to 500K Network Rail station SW demand on formal drainage systems. Identify long list of potential Authority management solutions. BX-Apperfield Work with TWUL to ensure drainage is monitored and maintained Rd/Reddy Rd TWUL, around Aperfield Road and Manor Road, Erith, where significant 22 Drainage North End Less than 100K Highways surface water issues were experienced prior to TWUL maintenance improvement Authority of sewers in February 2010. s BX-Erith SW TWUL, Look to provide upstream storage capacity to address surface water 23 overflow Erith 100K to 500K Highways Education issues in Riverdale Rd, Church Rd and Pembroke Road, Erith. management Authority
Page 3 of 4 London Borough of Bexley Local Flood Risk Management Strategy Action Plan September 2015 Actions Partners Costs Range ID Action Name Ward Action description Other RMAs Other Non RMAs BX-Pembroke Work with TWUL to develop partnership funding scheme to reduce TWUL, EA, 24 Road Erith risk of combined surface water flooding and sewer flooding in Less than 100K Highways watercourse Pembroke Road, Erith and surrounding area. Authority BX-Fraser Highways Road SW Address historical surface water flooding in Fraser Road, Erith in 25 Erith Less than 100K Authority, Developers flood developer proposals linked to Erith Quarry development. TWUL resilience BX-Lower Develop closer partnership working arrangements to secure Belvedere Highways Network Rail and 26 Belvedere improved maintenance of the main river / ordinary watercourse Less than 100k holistic Authority Riparian owners network draining upper and lower belvedere. maintenance BX- Thamesmead Assist the EA project of evaluation of the Thamesmead ditch and EA, ditches and Thamesmead East and 27 dyke system including optioneering of improvements or changes in 100K to 500K Highways dykes- Lesnes Abbey maintenance regime. Authority continuous system BX-St Michael's Review areas that lack formal drainage to include survey, modelling 28 ward - St Michael's 500K to 1M EA and options assessment. drainage review BX-Brampton Work with TWUL to develop partnership funding scheme to reduce ward - flood risk around Long Lane, Heversham Road, Swanbridge Road 29 Brampton 500K to 1M TWUL drainage and Wenvoe Avenue, Bexleyheath. Requirement for offline storage capacity ,education and encouraging uptake of retrofit SuDS.
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