Drilling system employed for Passy artesian wells. Section of the well and for the motor mechanism. The Bois de Boulogne is a large public park located along the western edge of Paris. During its construction the pumps from the Seine could not provide enough water to fill the lakes and irrigate the park, so a new channel was created to bring the water of the Ourcq River from Monceau to the upper lake in the Blois, but this was not enough. An artesian well 1922 feet deep was eventually dug in the plain of Passy which could produce twenty thousand cubic meters of water a day. This well went into service in 1861. The water then had to be distributed around the park to water the lawns and gardens; the traditional system of horse-drawn wagons with large barrels of water would not be enough. A system of 41 miles of pipes was laid, with a faucet every 100 or 130 feet, a total of 1600 faucets. It's the last artesian well in Paris that is still in use today.