“The first, and so far only, green infrastructure solution to flooding in Highland Park’s valleys is completed along Negley Run Boulevard — a 1,100-foot bioswale that will intercept an estimated 600,000 gallons of water running off pavement annually. . . .
“The soil and plants are held in place by a polyethylene mat of porous, interconnected cells. The webbing material and the plants that grow through it filter impurities out of water. Bioswales are designed to handle rushing water, and more of it, than typical rain gardens, but the role of both is to absorb water.
“Mr. Himes designed the bioswale based on a 24,000-square-foot drainage area of impervious surfaces, with enough capacity to accommodate water from future projects. It slopes along the boulevard and ends at a rain garden at Washington Boulevard.”