The Environment Agency is the principal authority with responsibility for flood risk management in England, although local authorities also carry out works on less critical watercourses. The following tables show capital improvement works carried out by the agency only and exclude maintenance and operational work.
1. Projects to renew or improve fluvial (non-tidal) defences on northern and southern tributaries of the River Thames.
Flood Prevention Renewals Location London Borough Cost (£) 2004-05 Prince Edward Playing Field Flood storage area on the Edgware Brook, Cannons Park Harrow 1,200,000 2004-05 Sixgates Bank and retaining walls repair works on the River Roding. Barking Barking and Dagenham. 800,000 2005-06 Priory Park Increase size of Flood Storage Reservoir. Stanmore Harrow 800,000 2005-06 Stonywood lake FSA Reconstruction of dam and increase size of Flood Storage Area on the Deans Brook Mill Hill Barnet 1,400,000 2005-06 River Lee FRC Walthamstow Major repair of existing channel of the River Lee Flood Relief channel Walthamstow Walthamstow 1,200,000 2005-06 Pymmes Brook Culvert. Removal of a culvert which presented a threat to blocking the Pymmes Brook Edmonton Enfield 1,300,000 2004-05 Low Hall Trash Screen. Reconstruction of trash screen Walthamstow Walthamstow 100,000 2004-05 Field End Road Trash Screen Reconstruction of trash Screen Eastcote Hillingdon 100,000 2005-06 Wealdstone Brook Bank works Repair to banks to prevent collapse and blockage of the Wealdstone Brook Kenton Harrow 100,000 2004-06 Mayes Brook Sluices Reconstruction of the Sluice gate and control structure for the flood storage area Barking Barking and Dagenham 900,000 2005-06 River Pinn Diversion Removal of culvert, on the river Pinn. Hatch End Harrow 200,000 2004-05 2006-07 Washlands Flood Storage Reservoir Reconstruction of the flood storage reservoir and increase in capacity Dagenham Barking and Dagenham 4,400,000 Total 12,500,000
Flood Prevention Renewals Location London Borough Cost (£) 2002-07 River Quaggy Flood Alleviation Scheme River Quaggy Greenwich and Lewisham 18,000,000 2007-08 Refurbishment of three trash screen sites on the Beverley Brook Ashlone Warf, Putney, Richmond Park, and New Maiden Richmond and Merton 150,000 2007-08 Refurbishment of EA Trash screen -Upper Elmers End Beckenham, St James Stream Bromley 15,000 2007-08 Refurbishment of EA Trash Screen Kyd Brook Bromley 51,000 2007-08 Refurbishment of EA Trash Screen Ravensbourne Bromley 34,000 2005-07 Channel reprofiling and increased flood storage Hogsmill near A240 RB Kingston upon Thames 120,000 2006-07 Channel reprofiling, creation of flood banks and increased flood storage Ladywell Fields Lewisham Lewisham 100,000 2002-04 Channel reprofiling, creation of flood banks, increased flood storage and flood warning improvements Chinbrook Meadows Lewisham 250,000 2002 Channel reprofiling and increased flood storage Shaftesbury Park London borough of Bromley 90,000 2002-03 Channel reprofiling and increased flood storage Norman Park London borough of Bromley 180,000 2005-07 Channel reprofiling, creation of flood banks, increased flood storage, construction of new trash screen and flood warning improvements Upstream of Hayes Lane Bromley London borough of Bromley 450,000 2003-06 Channel reprofiling and increased flood storage Crayford Marshes Erith London borough of Bexley 250,000 2005-06 Raising of flood defences, improvements in capacity of structure and flood warning improvements Flood Siphon on River Graveney at Colliers Wood London borough of Merton 900,000 2004-05 Banks stabilisation and weir removal. River Wandle outside Garrett Lane Depot London borough's of Merton and Wandsworth 120,000 Total 20,710,000
2. Projects to renew or improve Thames Tidal defences along the northern and southern banks of the River Thames.
Flood Prevention Renewals Location London Borough Cost (£) 2002-03 Strengthening and renewal of masonry flood defence wall (tidal) Strand on the Green Hounslow 782,000 2004-05 Renewal of a deficient flood defence wall (tidal) Upstream of Barking Barrier Barking and Dagenham 92,000 2005-06 Renewal of tidal flood defence wall New England Wharf Barking and Dagenham 1,300,00 2005-06 Renewal of tidal flood defence wall Frogmore Estate Barking and Dagenham 425,000 2005-06 Renewal of tidal flood defence wall Anchor Bay Wharf Bexley 770,000 2006-07 Renewal of tidal flood defence wall Old British Gas Site Barking and Dagenham 35,000 2006-07 Renewal of masonry flood defence wall (tidal) Four Gates Sluice Barking and Dagenham 460,000 2006-07 Renewal of tidal flood defence earth embankments Dartford Creek Frontages Bexley 2,600,000 2006-07 Renewal of tidal flood defence steel sheet pile wall Marley Water Proofing Frontages Barking and Dagenham 600,000 2007-08 Renewal of tidal flood defence steel sheet pile wall Marley Water Proofing Frontages Barking and Dagenham 700,000 2007-08 Renewal of tidal flood defence earth embankments Dartford Creek Frontages Bexley 2,500,000 2007-08 Renewal of tidal flood defence walls Isle of Dogs Frontages Tower Hamlets 1,000,000 Total 11,264,000