The program replaces the typical curb-and-gutter system of many streets with plantings, permeable ground covering and innovative catchment systems that help reduce pollution from runoff.
"So popular is the 'Green Streets' program that the city publishes a map on its website directing tourists to the most exciting storm sewer sites.
'When we started this 10 or 12 years ago, there was a lot of skepticism,' says Dean Marriott, director of Portland's Bureau of Environmental Services. 'Today, many cities are moving in this direction. People want to see how it's done.'"