Another possibility is contact with domestic sheep that were once grazed in the area in substantial numbers. Domestic sheep were brought to North America from Europe and Asia, carrying diseases against which North American sheep have no immunity. Surveys as late as 1960s estimated there were about 100 bighorns in the West Needles. Harrison said that the number of domestic sheep grazing in the area where the bighorns are to be released has been slashed in the last few years. He believes the area can once again support a herd of about 100 bighorns.
Many large events leave quite a mess behind.
Each year, the National Football League works with local individuals and organizations to find ways to leave the host community in even better shape than they found it. One of the ways the NFL does this is through its annual Environmental Program - a series of local projects designed to outlast Super Bowl and, wherever possible, become permanent benefits to the community. This year, the National Football League has developed five community projects under the umbrella of the Environmental Program. All the projects use existing community resources to address local issues. Because of this, the potential exists for these projects to continue long after Super Bowl XXXV moves from the playing field to the record books.