Alluvial Wall is an outdoor 2001 sculpture by Peter Nylen and the architectural firm Rigga located along the Eastbank Esplanade in Portland, Oregon.

https://en.wikipedia.org/wiki/Alluvial_Wall

Alluvial Wall

Ghost Ship is an outdoor 2001 sculpture by James Harrison and Rigga, a group of local artists, located along the Eastbank Esplanade in Portland, Oregon. It is made of copper, stainless steel, art glass, and two lamps. It is part of the City of Portland and Multnomah County Public Art Collection courtesy of the Regional Arts & Culture Council.

https://en.wikipedia.org/wiki/Ghost_Ship_(sculpture)

Ghost Ship

House Spirits Distillery

Westward Whiskey

Stack Stalk is an outdoor 2001 sculpture by Ean Eldred and the architectural firm Rigga, located along the Eastbank Esplanade in Portland, Oregon.

https://en.wikipedia.org/wiki/Stack_Stalk