The nonprofit organization 3 Rivers Wet Weather helped Allegheny County Sanitary Authority conduct a study on the feasibility of using green infrastructure as a cost-effective, long-term sustainable solution for Pittsburgh’s wet weather problems. Water resources engineers from the organization turned to an EPA tool for help identifying specific “best management practices” (BMPs) for the area: EPA’s BMP Siting Tool. “Gray infrastructure” (or man-made traditional infrastructures), the distribution systems and pipes throughout the city, is expensive to replace or upgrade. In
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