Izikhungo ku Iowa City vula Boyd Tower ube nesilinganiso esimaphakathi — 3.3 (ngokwezilinganiso zomsebenzisi Mapich).
Boyd Tower, Iowa City ezitholakele — isibhedlela.
Le datha ikhiqizwa kusetshenziswa izihlungi zangokwezifiso ezisuselwe kukho 1 inkampani, eyethulwe kuleli khasi.