CHICAGO—According to city planners, Chicago has run out of new names for its subdivisions. "It was bound to happen sooner or later," Chicago Mayor Richard M. Daley said at a Monday press conference in front of City Hall. "Oak Dale Springs, Whispering Pines, Stonewood Creek... We have used every tree, body of water, and living thing in the almanac. You don't have to drive all the way out to Kevin Acres to know we need a new naming system." Daley announced that, beginning in 2004, all new housing developments in the Chicago area will be numbered with a positive integer.