 The population increased from 800 feus (4,000 inhabitants) in Cherbourg and 95 in Octeville, around 1715, to 7,300 people in Cherbourg by 1778.Louis XVI decided to relaunch the project of the port on the English Channel.After many hesitations, it was decided in 1779 to build a -long sea wall between île Pelée and the tip of Querqueville, using a method developed by Louis-Alexandre de Cessart, a pier of 90 wooden cones of by 20, filled with masonried rubble, connected by iron chains.