Delta Works was completed by the Europoortkering which required the construction of the Maeslantkering in the Nieuwe Waterweg between Maassluis and Hoek van Holland and the Hartelkering in the Hartel Canal near Spijkenisse. The works were declared finished after almost forty years in 1997. In reality the works were finished on 24 August 2010 with the official opening of the last strengthened and raised retaining wall near the city of Harlingen, Netherlands. Due to climate change and relative sea-level rise, the dikes will eventually have to be made higher and wider. This is a long term uphill battle against the sea. The
Protected areas of Canada also under federal control, do not afford the same level of protection. The Canadian Wildlife Service, a division of Environment Canada, manages the National Wildlife Areas, Marine Wildlife Areas, and Migratory Bird Sanctuaries for the protection of wildlife. A National Wildlife Area protects any land or marine environment within the Canadian territorial waters, that is, extending up to away from a coast per the United Nations Convention on the Law of the Sea. A Marine Wildlife Area is used to protect marine environments that are within Canada's Exclusive Economic Zone, extending from the coastline. Two separate areas, one a National