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Thameside SWMP Stage 1 Report.doc

Thameside Stage 1 SWMP : Summary and Actions Drainage Area 03

Area overview

2 Area (km ) 76

Drainage assets/systems Type Known Issues/problems Responsibility

Sewers (combined, foul and Known problems of surcharging and overloaded sewers at Southern Water and Sewer Network surface water) numerous locations across the drainage area Thameswater

Main river and ordinary Environment Shorne and Higham Marshes There are no known issues. watercourse Agency/Landowner/KCC

Unnamed Drains - collection of drains Oridinary watercourse There are no known issues. Landowner/KCC

Flood risk

Receptor Source Pathway Historic Evidence

There is historic evidence of Southern Water Sewers Heavy rainfalll resulting in run off affecting highways A: Lower Higham surface water run off and and overloaded sewers. Surface water flows along Church Street and Chequers overloaded sewers Street FMfSW 1 in 200 yr (deep)

Southern Water Sewers Incidents of flooding within Heavy rainfall resulting in the curtilage of properties B: Higham surface water run off Surface water flows along Hermitage Road and School and flooding along the leading to overloaded Lane carriageway sewers Localised ponding occurs in low spots of Higham. FMfSW 1 in 200 yr (deep)

Southern Water Sewers Heavy rainfall resulting in Incidents of flooding caused C: Istead Rise flooding from overloaded by overloaded sewers Overland surface water flows along Downs Road, Brookes sewers recorded by Southern Water Road, A227, and Bracondale Avenue and Lewis Road

Records from Kent County Heavy rainfall resulting in Council show flooding of the D: Hook Green & Meopham Station run off and overloaded Surface water flows along Wrotham Road carriageway caused by drains and gullies surface water.

Southern Water Sewers There are records of Heavy rainfall resulting in hydraulic overload from E: Meopham surface water run off, A227 is a known route for surface water run off. sewers and gullies. There overloaded sewers and are also records of surface gullies Localised ponding on Cricketers Drive, Pitfield Drive, water run off affecting Whitehill Road and Meopham School highways.

Water main. Heavy rainfall resulting in overloaded gullies and run Gullies and drains off. There are historic records of F: Vigo Village A227 is a known route for surface water run off. flooding from various A burst water main has also sources. been described as a source Localised ponding across Vigo Village along Waterlow of flooding. Road, Timber Bank and Fern Down.

Summary of Location-specific Actions

Area of benefit Location of action Action Action owner Priority Instead Rise (B) Monitor the performance Hook Green (D), Wrotham Road of the newly installed KCC Long term soakaways.

Investigate the method of surface water drainage on this road, i.e. check Istead Rise (B), School Lane KCC, SW Short Term records to assess where the surface water is draining to. North

Β Legend

Combined Sewer Surface Water Sewer Foul Sewer Main River (EA) - open channel C Main River (EA) - culverted Ordinary Watercourse - open channel Ordinary Watercourse - culverted Receptors A Lower Highham Β Higham C Istead Rise D Hook Green & Meopham Station D Text E Meopham F Vigo Village

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This document is the property of Jeremy Benn Associates Ltd. It shall not be reproduced in whole or in part, nor disclosed to a third party, without the permission of Jeremy Benn Associates Ltd. Scale 1:50,000

Thameside Stage 1 SWMP F Watercourses and Drainage Systems This map is based upon Ordnance Survey material with the permission of Ordnance Survey on behalf of the Controller of Her Majesty's Stationery Office (C) Crown Copyright. DA03 Unauthorised reproduction infringes Crown Copyright and may lead to prosecution or civil proceedings. 100019238. 2012 Legend

North Main River (EA) - open channel Main River (EA) - culverted Ordinary Watercourse - open channel Ordinary Watercourse - culverted A Lower Highham Β Higham C Istead Rise A D Hook Green & Meopham Station E Meopham F Vigo Village Historic flooding (other RMAs)* Β ! Other/Unknown ! Fluvial * Where an entire road has been Groundwater highlighted in the historic layer; this ! does not mean that all the road has flooded in the past but rather no specific ! Combined location was identified in the records received. ! Surface Water C ! Sewer ! Tidal Sewer Flooding Incidents (Thames Water)** Number of flood occurences per postcode area 1 - 3 ** Polygons only represent the 4 - 6 postcode area and not the flood 7 - 8< extent Sewer Flooding Incidents (Southern Water)** Number of flood occurences per postcode area 1 D 2 3< Client: Consultant:

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Historical Flooding This map is based upon Ordnance Survey material with the permission of Ordnance Survey on behalfF of the Controller of Her Majesty's Stationery Office (C) Crown Copyright. Unauthorised reproduction infringes Crown Copyright and may lead to prosecution or civil proceedings. 100019238. 2012 DA03 North

A A Legend Main River (EA) - open channel Main River (EA) - culverted Ordinary Watercourse - open channel B Ordinary Watercourse - culverted Β ") Education GF Healthcare # Emergency Services 0.3m deep FMfSW 1 in 200yr AEP > 0.3m deep

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Thameside Stage 1 SWMP F F Please NOTE: The Flood Map for Surface Water provides an indicative outline of areas that may be susceptible to surface water flood risk, it does not indicate actual risk Surface Water and Critical Infrastructure This map is based upon Ordnance Survey material with the permission of Ordnance Survey on behalf of the Controller of Her Majesty's Stationery Office (C) Crown Copyright. DA03 Unauthorised reproduction infringes Crown Copyright and may lead to prosecution or civil proceedings. 100019238. 2012