Chinook Arc is an interactive, illuminated sculpture created as part of a new urban park where downtown Calgary meets a historic residential area.
The artwork is a permanent installation made of a steel skeleton and a translucent acrylic skin that allows it to emit a soft, internal glow. The form draws inspiration from the historic Beltline Streetcar loop that once encircled the neighborhood, as well as the 'Chinook arch clouds' a regional weather phenomenon that periodically blankets the sky. These two influences inspired the crisp edges and rounded curves seen in the work. During the day, sunlight gives the sculpture an ethereal, semi-translucent appearance. At night, the installation becomes an immersive color environment. The sculpture's interactive lighting invites people to engage with the sculpture and gives the piece an emotive, perceptual character akin to a living organism.
The sculpture pushed the boundaries of public art by developing innovative structural and technological solutions. With the structure, a system of silicone bushings allows the two-layer acrylic skin to 'float' above the steel skeleton, giving it space to contract and expand with Calgary's extreme temperature changes. The piece contains a bespoke sensor and lighting system that reacts to visual stimuli such as waving hands, colored clothing or playing a music video on a smartphone. The process of visitors engaging and interacting with the sculpture gives the artwork a unique sense of personality. At times of no public activity, programmed lighting sequences animate the sculpture creating a constant and dynamic attraction in the neighborhood.
The monumental sculpture has already become a landmark in the community, operating as an energetic focal point where people congregate for events, stop on their evening walks, take their engagement photos, or duck under to escape the noise of the surrounding city.