Infrastructure as an Engine: Bridge Waterworks Construction in London and Paris

By the late 16th century, rapid population growth, economic development, and urbanization in cities like London and Paris created a growing demand for urban water supply. This paper studies construction of bridge waterworks and hydraulic technology in the context of inhabited bridges, focusing on key examples from Old London Bridge to Pont Neuf and Pont Notre-Dame. It also highlights the exchange of machinery and city policies in shaping and managing waterworks. Drawing on hydraulic principles and waterwheel technology (including piston-pump mechanisms) from German and Italian Renaissance techniques, Dutch engineer Peter Morris, installed the waterworks in the arches of London Bridge in 1581. This marked a significant transfer of technology in water distribution systems and wooden pipe networks, influencing similar infrastructure developments in Paris, other European cities, and North America.

The paper first examines the construction and hydraulic systems of the London Bridge waterwheels, built on the medieval bridge’s piers, with a final capacity of five waterwheels driving 16 engines. In contrast, French pump houses were built as stilt houses, elevated on piers anchored to the Seine Riverbed with dozens of wooden stakes, designed to pump water and function as independent structures, stable against fluctuating river levels during floods. The La Samaritaine Pump (1605), the first hydraulic pump in the Seine, featured four engines on Pont Neuf, with a three-story building 35 meters above the river. This design was similar to the Notre-Dame Pump House (1682), which had eight engines and a tower.

The paper explores the mutual technical and political influence between waterworks and bridges, with bridges harnessing river flow to supply water to London and Paris. The shift from church to royal authority impacted bridge management, leading the London Bridge House to lease arches to Peter Morris, who obtained a patent from Elizabeth I for an innovative water pump. This patent became a key tool in establishing the early water industry. The construction of waterwheels followed the creation of the Dutch Nonsuch House on the bridge in 1579, as the first prefabricated wooden building, marking key developments in modernizing the industry under London Bridge House's management. The new technology facilitated a social shift on London Bridge, granting middle and high-class families access to Morris's water supply. The London Bridge Waterworks served over 8,000 homes in North London, while similar systems in Paris, such as the Samaritaine pump (1605) and Notre-Dame Pump House (1676), combined royal authority and private enterprise to supply water to Versailles, the Louvre, and central Paris fountains.

This study highlights the construction of bridge waterworks in early urban water supply systems, illustrating the technological exchanges and political shifts that shaped infrastructure in London and Paris. It underscores how privatization contributed to inequalities in water access, while emphasizing the broader technological implications of early water distribution systems across European cities.