In collaboration with Patricio Coronado and Gus Tomizuka

Parallel H(ear) (2024) is a two-hour durational performance and installation at Agua Caliente Wash, a former riverbed in Tucson now mostly in drought. Working directly in the landscape, Bollinger pressed clay into its surfaces — the hollows of rocks, the knot of a tree, the carved interior of a dry wash — then cast those impressions into bronze, producing positive forms from negative spaces shaped by absence and time.

Musicians Coronado and Tomizuka developed parallel “audio impressions” from the same site: looping field recordings of wind, shifting gravel, and dry foliage, arranged into a quadraphonic soundscape. Returning to Agua Caliente, the bronze sculptures, each suspended by wire within open-frame aluminum stands, swayed and sounded in the wind alongside aluminum circles, mirrors in varying orientations, and wind chimes — a field of objects dispersed across the wash for visitors to move through, touch, and play using rocks and found objects; a quadraphonic soundscape, its speakers hidden around a perimeter of roughly 30 by 50 feet, activated the landscape so that the wash itself seemed to emanate sound from the earth. Parallel H(ear) was the first iteration of the ongoing project (~) Echo( ), later presented at MOCA Tucson in 2025–2026.