Harpin’s most important work was a set of squares and green Spaces designed for Portland in the 1960s. The three squares are connected by a series of completed pedestrian malls. Lovejoy Plaza, the first stop in the series, is a lively and exciting center designed for public participation in terms of what the name means. The fountains of the square draw people to get wet and into them to discover the feeling of the waterfall. The fountain is surrounded by a platform of irregular broken lines.
The concrete steps and the side of the pool in aiyue square create a feeling like water washing away. The image is inspired by the plateau desert and famous for its symbolic cliffs. The design is inspired by natural waterfalls and cliffs.
For harpin, the Portland series showed his unique understanding of nature. The irregular platform of aiyue square is the simplification of natural contour line. The irregular roof of the lounge in the square derives from the impression of the rocky mountain ridge line. The fountain’s flow is the result of his repeated study of the High Sierra mountain streams in California.