According to a recent study of 132 urban areas in the United States, Boise, Idaho is the 10th most vulnerable to a bio-terrorist attack. The study was funded by the Department of Homeland Security and headed up by University of Arizona mathematics professor Walter W. Piegorsch. Boise was the only city west of Texas to make the top 10 list. That’s right, cities like Seattle, Portland, and Los Angeles are not considered highly vulnerable–at least according to this study.
The three factors considered in the study included social aspects, natural hazards, and the construction of the city. What’s important to realize is that this study measured the vulnerability of cities to attacks–not the probability.
Boise has three large dams upstream. 2 of them are earth-filled: Lucky Peak and Anderson Ranch; Arrowrock is concrete. With the Boise River running through the heart of the city, the failure of these dams (whether intentional or accidental) could devastate the downtown district of the city and many surrounding cities.
The metro area is largely surrounded by federal- and state-owned lands that are composed of mostly grasses and sagebrush that are quite vulnerable to wildfires during the summer months.
While most agree that a terrorist attack in Boise is not likely, local officials are rightly taking the report seriously. They plan on discussing the findings with the authors of study and the FBI.