Street Creeks is a low-impact, cost-effective hybrid green-gray infrastructure strategy developed to minimize the burden of urban storm water on existing combined sewer systems by conveying large volumes of water along surface channels “carved” out of existing rights-of-way, thereby reducing or preventing CSO (combined sewage overflow) events.  Street Creeks can also clean the most polluted “first flush” of surface runoff via integrated greenstreets and bioswales.  Through these low-impact modifications to existing roadways and associated infrastructure, Street Creeks provides higher removal rates than other GI strategies, with less physical intrusions and lower cost than gray infrastructure.