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Dense, urban developments often have limited or no space for the typical stormwater management techniques. As a result, rooftops are increasingly playing a role in stormwater mitigation and management as more and more municipalities are requiring developers to detain larger volumes of water on their sites to delay the entry of water into outdated and overburdened storm sewer systems.

Hydrotech has been involved in stormwater management on rooftops for decades, and we are especially proud to have been a part of the Bill & Melinda Gates Foundation headquarters project. The campus includes a massive stormwater collection and re-distribution system capable of harvesting over three million gallons of water per year.

This system, along with the stormwater retention provided by the Garden Roof Assembly and other site landscape features, reduces the campus’ overall potable water use by over 75%.