A sketch done by Halprin references the "Sierra at 11,000 feet" and muses that the rock could inspire a possible "wall for Portland fountain."  Search “lawrence halprin oral history project” from Charles Birnbaum on the Future of Landscape Architecture

Search “lawrence halprin oral history project”

A sketch done by Halprin references the "Sierra at 11,000 feet" and muses that the rock could inspire a possible "wall for Portland fountain."