Quite the ambitious program:
The state Department of Natural Resources issued MMSD a new five-year pollution discharge permit this week that requires the district to establish 1 million gallons of so-called green storm-water storage capacity each year, said Ted Bosch, a DNR wastewater engineer in Milwaukee. Sewer pipes, bedrock tunnels and concrete reservoirs cannot be used to meet the mandate.Compare this approach to the 'there's-nothing-we-can-do' defeatism infecting other pieces of the public debate.
The district must use plants and soil, as well as some trendy rain barrels, to comply with the storage requirement. Apart from green roofs, the tools available include planting rain gardens at the ends of downspouts, installing porous pavement in parking lots that allows storm water to seep into the ground, creating landscaped swales on the sides of streets, and protecting wetlands and floodplains.