The London sewage system redesigned by Joseph Bazalgette in the 1860s remains the foundational infrastructure for the city’s waste management today. Triggered by the 1858 Great Stink, his engineering response fundamentally altered the health trajectory of the British capital by successfully diverting waste away from the central Thames through a massive network of brick-lined underground tunnels.
Early Career and Professional Foundations
Born in 1819 in the London Borough of Enfield, Joseph William Bazalgette was the son of a retired Royal Navy captain. He began his professional path as an apprentice to the noted civil engineer Sir John Macneill. After gaining experience in land drainage and railway projects both in Ireland and China, he established an independent consulting practice in 1842. The intense demands of early railway expansion took a toll on his health, resulting in a nervous breakdown in 1847.
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In 1849, Bazalgette joined the Metropolitan Commission of Sewers as an Assistant Surveyor, eventually becoming the lead engineer in 1852. During this period, cholera epidemics devastated London, with 14,137 deaths in 1849 and another 10,738 in 1853. While medical experts at the time incorrectly attributed these outbreaks to miasma or foul air, the engineering solutions mandated by the Metropolitan Board of Works effectively separated the city from its contaminated water supply.
Execution of the Main Drainage System
Appointed Chief Engineer of the Metropolitan Board of Works in 1856, Bazalgette oversaw the construction of 82 miles of main brick sewers and 1,100 miles of street-level conduits. He utilized Portland cement to ensure the structural integrity of the tunnels. The project included major pumping stations at Abbey Mills, Deptford, and Crossness. Although the system originally released untreated sewage into the Thames, the infrastructure significantly reduced the prevalence of cholera, typhus, and typhoid.
Final Years and Public Recognition
Beyond his work in sanitation, Bazalgette served as President of the Institution of Civil Engineers starting in 1883 and designed the second Hammersmith Bridge, which opened in 1887. Queen Victoria conferred a knighthood upon him in 1875. He died in 1891 at his home in Wimbledon and was buried at St Mary’s Church.
Fast facts
- Born: 1819, London Borough of Enfield
- Died: 1891, Wimbledon
- Notable Works: Abbey Mills Pumping Station, Crossness Pumping Station
- Professional Role: Chief Engineer of the Metropolitan Board of Works
- Honours: Companion of the Order of the Bath, Knight Bachelor
- President of the Institution of Civil Engineers: Elected 1883
- Burial Site: St Marys Church, Wimbledon
Questions readers ask
Why were the sewers built?
The project was a direct response to the Great Stink of 1858 and the repeated cholera epidemics that plagued London.
What material was used for the tunnels?
Bazalgette utilized an innovative application of Portland cement to build the brick tunnels, which remained in good condition for over 150 years.
Achievements
- Knight Bachelor
- Notable work: Abbey Mills Pumping Station
- Notable work: Crossness Pumping Station
- Worked as architect, civil engineer and engineer