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

Musicians Coronado and Tomizuka developed parallel sound imprints from the same site, looping field recordings of wind, shifting gravel, and dry foliage 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. Hidden around a perimeter of roughly 30 by 50 feet, the speakers 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.