 His hydraulic chief engineer, Eugène Belgrand, built a new aqueduct to bring clean water from the Vanne River in the Champagne region, and a new huge reservoir near the future Parc Montsouris.These two works increased the water supply of Paris from 87,000 to 400,000 cubic meters of water a day.Hundreds of kilometers of pipes distributed the water throughout the city, and a second network, using the less-clean water from the Ourcq and the Seine, washed the streets and watered the new park and gardens.