aMA Plaza


Chicago, IL

AMA Plaza is a 52-story commercial tower located in downtown Chicago. The building was the last American building designed by architect Ludwig Mies van der Rohe, and has been declared a Chicago Landmark.

In 2015, the building received LEED Gold certification, a result of building ownership’s push to meet accredited standards of sustainability and environmental responsibility.

As part of this initiative, Omni Ecosystems provided a fully-planted, 5-inch-deep Omni Green Roof tray system for a 6,400-square-foot sedum roof. The green roof helps mitigate the urban heat island effect and stormwater runoff, among other environmental benefits that helped the building achieve LEED Gold.

Located 52 stories high, this roof was designed to withstand the extreme environment of skyscraper rooftops. High wind, scour, and dryness stand as obstacles to the health of plants. Accordingly, the irrigation system, unique to Omni Ecosystems green roof trays, helps ensure plant success and vitality in such harsh conditions. An automatic control station equipped with wind and rain sensors regulates watering time and duration for on-going health and stability of the plants.


“Upon learning about the compelling flexibility of the system – primarily the fact that it is lightweight and can utilize a variety of plant choices -  Omni Ecosystems designers engineered a unique system specific to our roof and which could withstand the extreme environment, including wind, of a location 700 feet above the ground on the 52nd floor of the building. Over two years later, and after a harsh winter, the performance of the green roof system has exceeded our very high expectations."

-Susan Hammer, Riverview Realty Partners