GSC convex tablet stamped 68L030, set vertically on the sidewalk of the south lane on the concrete bridge (for eastbound traffic) of Route 132, located 150.0 m west of the west end of the canal tunnel, on the south side of the bridge. The marker is located 10.20 m from a beacon on a lamppost, 0.30 m from the east end of the bridge, 0.15 m from the north face of the southwest pillar and 1.38 m from the edge of the pavement.
