Lawrence Seaway was completed and during that time, it was heralded as one of the greatest engineering feats of the 20th century. Lawrence Seaway Silver Coin. Designed by Claire Watson, the coin comes with a head-on view of a bulk carrier passing through the St. A NOD TO THE CITIES AND LANDSCAPES: The picturesque Seaway is part of the Great Lakes Waterway that flows past some of our largest population centres, represented here by the Montreal skyline in the background. AND TO THE HARD-WORKING PEOPLE BEHIND THE SCENE: The stylized anchor is a nod to all who oversee the safe and efficient passage of marine traffic. THIS ITEM IS GST / HST EXEMPT IN CANADA. Citadel Coins Halifax, Nova Scotia Official Royal Canadian Mint Distributor.