All of the man-made portion of the Canal is marked with numbered limestone blocks. The distance between them i 1000 ells, which corresponds to 594 metres.

In olden days, the bow-haulers who pulled the sailing boats though the Canal with their teams of oxen, charged per ellstone. 

In the eraly 19th century, the rate was 8 öre for 1000 ells, or 594 metres.