If the Ultimate Sports Resort goes up as proposed in North Las Vegas, it will virtually double the city's property assessment, according to the developers' numbers and Nevada Department of Taxation figures.

Ultimate Sports Entertainment Inc. is working to put together a financing package for a $4 billion project that will feature two sports arenas, an aquatic center, three multi-use facilities, a driving range, a bowling alley, an ice rink, batting cages, climbing walls, virtual reality games, as well as 17,000 parking spaces, 5,500 hotel rooms, 500 luxury condominiums and a 150,000-square-foot casino complete with a 50,000-square-foot, glass-enclosed non-smoking area.