Hydraulic engineering work that was built around the eighteenth century, probably on the initiative of the Society of Jesus, to promote irrigation to the land when the convent of St. Paul College was acquired by the St. Ignatius School, in 1700.
It is a building of civil baroque architecture, square shaped, of about 26 meters wide, which is still used. Captures and stores water from a branch of the canal to irrigate the orchards in the area. According to some authors, the deposit could also have some connection with the gunpowder factories that existed in the eighteenth century in Manresa.