9 Spaces 9 Trees (1980–3) was originally commissioned in 1980 for the rooftop of the Public Safety Building by the Seattle Arts Commission; it was re-imagined in 2007 and sited on campus at the University of Washington.
9 Spaces 9 Trees (1980–3) byl původně umístěn v roce 1980 na střeše Public Safety Building v Seattle Arts Commission ale byl v roce 2007 přestavěn a umístěn na akademické půdě v University of Washington.