Double locks of the temple

The canal contains several ponds: pond of the Deaths; pond of the Fight; pond Louis-white; pond of Récollets; pond of Swamps ("bassin des Morts ; bassin du Combat ; bassin Louis-Blanc ; bassin des Récollets ; bassin des Marais"); they are separated by five locks among which four are double: lock of La Villette (no 1 and 2); lock of the Deaths (no 3 and 4); lock of the Récollets (no 5 and 6); lock of the Temple (no 7 and 8); lock of the Arsenal (no 9).