This progress at domestic level transformed the townspeople's way of life and changed the boundaries of Mons and Spiennes. They used to get water from wells or fountains, sometimes over a hundred yards from their homes. Soon followed another urban project: the introduction in 1828 of city gas to illuminate new avenues and streets. These two changes are made possible by the demolition of the fortifications, which releases the land, and the diversion of Trouille including the strategic role of supply ditches was then passed.