050619 532 The Sioux City Council will be asked today to approve site plans for three U.S. Cellular cell towers. The network build-out is part of the telecommunications company's expansion into Sioux City. U.S. Cellular said last month that it expects to add about 30 total cell sites in Sioux City and the surrounding area, with only five being new tower builds within the city. In February, the council denied U.S. Cellular's site plan for a 130-foot cell tower at 2015 W. Sixth St. because the