Canada has many large bridges and tunnels, including 24 international vehicular bridges and tunnels linking Canada and the United States – specifically to the states of Maine, Vermont, New York, Michigan and Minnesota. Fourteen of these bridges and tunnels are in Ontario, nine are in New Brunswick, and one is in Quebec. As well, there are nine international railway bridges and tunnels – eight in Ontario, with another one in New Brunswick. Damage to one or more of these structures would cause short to medium-term traffic congestion at the border, and would hurt the economy of both countries.
Under the National Infrastructure Protection Plan, the Department of Homeland Security’s Homeland Infrastructure Threat and Risk Analysis Center (HITRAC) has the responsibility to produce assessments that support the strategic planning needed to enhance the protection and preparedness of the Nation’s critical infrastructure and key resources (CIKRs). HITRAC analyzed information about terrorist attack capabilities, goals, and objectives to assess the potential terrorist attack methods that might be used against CIKRs.
The Federal interagency community has developed fifteen all-hazards planning scenarios (the National Planning Scenarios or Scenarios) for use in national, Federal, State, and local homeland security preparedness activities. The Scenarios are planning tools and are representative of the range of potential terrorist attacks and natural disasters and the related impacts that face our nation. The objective was to develop a minimum number of credible scenarios in order to establish the range of response requirements to facilitate preparedness planning.