Pruned, a blog about landscape architecture and related fields, has a great post about a Portland stormwater runoff system in place at NE Siskiyou Green Street.
"Instead of using expensive and high maintenance system to funnel urban runoffs to distant, equally expensive and high maintenance treatment facilities and discharge points, they are instead managed on-site with simple, cost-effective, attractive and environmentally sustainable infrastructure."
There are a number of great pictures and diagrams (before and after) on the post as well.
