Project Profile_Hennepin Minneapolis_9-30-19

PROJECT PROFILE | MINNEAPOLIS, MN Downtown Minneapolis Tower Saves Environment & Money Kraken Membrane Filter

A Forterra Company

Minneapolis, Minnesota

Introduction Two blocks from the mighty Mississippi River is one of the busiest streets in downtown Minneapolis and the sight of the new designer-residential tower “Rafter.” Rafter is a 26-story, luxury high-rise apartment with 283 apartment units 1 and 6,000 square feet of retail space along Hennepin Avenue. 2 Typical of many major U.S. metropolitan downtown districts, both foot and vehicle traffic are extremely high; consisting of approximately 7,600 pedestrians, 1,500 bicyclists, and 18,600 vehicles per day.

As part of the new development, the engineering firm, Elan Design Lab of Minneapolis in conjunction with the developer, Mortenson Company, maximize on the high-value buildable space, creatively accommodating high volumes of traffic while complying with drainage and stormwater management standards required by the City of Minneapolis. Situation Infrastructure in the heart of the urban downtown areas consist of virtually all impervious surface areas and this newmodern development’s surrounding causeways are no different. Conventional pollutant byproducts of city life like oils, grease, phosphorus, nutrients, and heavy metals are expected to accumulate and in order to prohibit the negative environmental impact, developers are required to implement proven stormwater management systems that collect contaminated water run- off. According to the Minnesota Pollutant Control Agency, “Urban development can significantly impact watersheds by increasing runoff and pollutant loading. Moreover, there’s increasing concern about the quality of Minnesota’s groundwater, which supplies drinking water for three-fourths of the state’s population... our lakes, streams and ground waters continue to be degraded by pollutants that are carried in runoff. This kind of pollution is called ‘nonpoint-source pollution.’” 3 Minneapolis has made many efforts to control and mitigate hazardous pollutants generated from these impervious areas.

5796 Armada Drive #250, Carlsbad, CA | 855.566.3938 | stormwater@forterrabp.com | www.biocleanenvironmental.com

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