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Show Roman Dikes The dikes which protect the Netherlands Nether-lands from the North sea In many cases go back to Roman times. Many are raised as much as 40 feet above high-water mark and are wide enough at the top for a general rondwny or canal. They are made of earth protected pro-tected by stone slopes and by piles and at the more dangerous points by artificial structures of brushwood, laden with stones. The West Kapelle dike is 1 2.4GS feet long and has a seaward sea-ward slope of 300 feet. On a ridge :!'. feet wide are a roadway and a railway. |