Wood Screw Pump

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Drainage Pumping Station No. 6 in New Orleans
Patent diagram for Wood Screw Pump (page 1)
Patent diagram for Wood Screw Pump (page 2)

The Wood Screw Pump is a low-lift axial-flow drainage pump designed by A. Baldwin Wood in 1913 to cope with the drainage problems of New Orleans. Until the installation of Wood's extremely efficient pumps, the city had experienced chronic flooding problems, bringing diseases such as malaria and yellow fever together with contamination of drinking water supplies. The pumps are driven by 2,000 horsepower (1,500 kW) synchronous General Electric motors, built in the early 1900s. They were designed to lift a large volume of water over levees some 10 m high, into Lake Pontchartrain. [1]

Having proved their operational efficiency in New Orleans, Wood's pumps were installed in India, China, Egypt, and the Netherlands. Until the arrival of hurricane Katrina, the pumps had kept New Orleans from becoming waterlogged for close on 100 years. [2]