Delta Works needed level of flood protection and the resulting costs are a recurring subject of debate, and involve a complicated decision-making process. In 1995 it was agreed in the Delta Plan Large Rivers and Room for the River projects that about 500 kilometres of insufficient dyke revetments were reinforced and replaced along the Oosterschelde and Westerschelde between 1995 and 2015. After 2015, under the High Water Protection Program, additional upgrades are made. In September 2008, the Delta Commission presided by politician Cees Veerman advised in a report that the Netherlands would need a massive new building program to strengthen the country's
European SEA Directive 2001/42/EC edited in the areas of "agriculture, forestry, fisheries, energy, industry, transport, waste management, water management, telecommunications, tourism, town and country planning or land use" and which define the referee scene/panel for authorising the projects listed in the directive 85/337/EC enclosure I and II or for which, considering their effects, it is necessary an evaluation made according to the articles 6 and 7 of the directive 92/43/EEC (Article 3 of the European Directive 2001/42/EC). Besides, the Directive establishes that it will be necessary an "environmental report" at the end of the evaluation phases. The European SEA Directive will be generally integrate