Northern Outfall Sewer

Greenway footpath, London
Victoria Park East Cross Route  A12  Fish Island Hackney Wick 600m River Lea   Tower Hamlets Newham boundary Queen Elizabeth Olympic Park East Anglia Main Line Pudding Mill Lane DLR station 200m City Mill River Waterworks River Stratford High Street  A118  Abbey Mills Pumping Station Abbey Creek Abbey Road DLR station 200m Canning Road Jubilee line & DLR lines Manor Road  A1011  West Ham 250m Essex Thameside & District lines Plaistow 400m Memorial Recreation Ground Upper Road Balaam Street  B116  Barking Road  A124  Prince Regent Lane  A112  Newham University Hospital Boundary Lane Newham Way  A13  CS3 LCN13 Beckton DLR station 600m Royal Docks Road  A1020  NCR13

The Northern Outfall Sewer Under Construction

Northern Outfall Sewer (Greenway) over Manor Road A1011

The Northern Outfall Sewer (NOS) is a major gravity sewer which runs from Wick Lane in Hackney to Beckton sewage treatment works in east London; most of it was designed by Joseph Bazalgette after an outbreak of cholera in 1853 and the "Great Stink" of 1858.

Prior to this work, central London's drains were built primarily to cope with rain water, and the growing use of flush toilets frequently meant that they became overloaded, flushing sewage and industrial effluent into the River Thames. Bazalgette's London sewerage system project included the construction of intercepting sewers north and south of the Thames; the Southern Outfall Sewer network diverts flows away from the Thames south of the river.

In total five interceptor sewers were constructed north of the Thames; three were built by Bazalgette, two were added 30 years later:

• The northernmost (High Level Sewer) begins on Hampstead Hill and is routed past Kentish Town and Stoke Newington and under Victoria Park to the start of the Northern Outfall Sewer at Wick Lane.
• Two middle level sewers serve parts of central London and also join the Northern Outfall Sewer at Wick lane:
  • One begins close to Kilburn and runs along Edgware Road, Euston Road and past King's Cross, through Islington to Wick Lane.
  • The other runs from Kensal Green, under Bayswater and along Oxford Street, then via Clerkenwell and Bethnal Green to Wick lane.
• Two low-level sewers stretch from west London:
  • One starts from near Ravenscourt Park, passes under Hammersmith and Kensington, Piccadilly, the Strand, Aldwych, the City and Aldgate to Abbey Mills.
  • The second begins in Hammersmith, crosses under Fulham and then runs along the King's Road and Cheyne Walk from where it becomes an integral part of the Thames Embankment. Western pumping station near Chelsea Bridge helps maintain the necessary gravity flow, taking sewage on along Millbank, the Victoria Embankment and Tower Hill, then north-east under Whitechapel, Stepney and Bow to Abbey Mills.[1]

The flows from the two low level sewers are raised by some 40 feet (12 m) into the Northern Outfall Sewer at Abbey Mills Pumping Station to join the flows from the High and Middle Level sewers.

The remaining sections of the NOS carry the sewage from Abbey Mills to the treatment plant at Beckton. The creation of the NOS was a massive undertaking, and involved the construction of both huge embankments and several bridges. Today, the eastern end of the Northern Outfall Sewer, running some 4 ¹⁄₂ miles (7 km) from Wick Lane, Bow to Beckton has been landscaped to form a public footpath/cycleway called The Greenway with access points along its length.