Greening of Target Center roof is complete

One of the largest rooftops in downtown Minneapolis has gone green. Target Center’s 2.5 acre roof is now the largest green roof in Minnesota and, at the time of design, the fifth largest green roof in the United States. The City-owned Target Center is also the first arena in North America to have a green roof.

Benefits of the Green Roof

Green roofs provide ecological benefits by reducing the negative effects of hard surfaces, like traditional roofs, on stormwater quality, volume, rate, and temperature on the receiving waterbody, in this case, the Mississippi River. It is estimated the green roof will capture one million gallons of stormwater annually, preventing drainage into the Mississippi River.

The green roof will also help in mitigating the heat island effect in downtown Minneapolis by reducing the roof’s temperature by as much as 80 degrees Fahrenheit.

The installation of the green roof also provided jobs for Minneapolis residents: Seventy-five of the workers who worked on the installation were Minneapolis residents and 20 of the workers were graduates of training programs at Summit Academy OIC.

Minneapolis as an Environmentally Friendly City

Minneapolis is recognized as one of the most environmentally friendly cities in the country. Target Centers green roof is just one of many examples of how City government has led by example and taken advantage of the benefits of being green. City Hall is also home to a green roof, and several Public Works and Fire Department facilities use solar arrays to help generate power. The City has also adopted a Leadership in Energy and Environmental Design (LEED) Silver standards, which require new or significantly renovated City facilities to meet some of the highest standards for sustainability in their planning, design, construction and commissioning. A new ordinance limits vehicle idling in the city to reduce emissions, and Minneapolis is the first U.S. city to require higher fuel efficiency for taxis. The City's innovative stormwater utility program has dramatically increased the use of rain gardens and other effective practices to protect our lakes from stormwater runoff. Minneapolis has also created a unique program to provide microgrants to community organizations to support their efforts to fight climate change. Information about this and other efforts are available at the City's Sustainability site. l

The installation and ongoing maintenance of the green roof is the last stage of a necessary roof replacement project that also includes replacing all 29 smaller roofs on five levels. The cost of roof replacement for all 30 roofs is $5.32 million and is paid for using a set-aside capital fund for improvements.

Sept. 16, 2009

Published Sep 16, 2009