Natural Drainage System

In Seattle, frequent, severe storms stress the city’s drainage, causing flooding in the streets and sewer backups — a condition that promises to be magnified by climate change. But an innovative collaboration driven by the city’s water, sewer, and drainage agency has resulted in the...

Like many cities, Seattle, has had its share of problems with combined sewer overflows (CSOs) and sanitary sewer overflows (SSOs). Recently, more than 154 million gallons of raw sewage and storm water spilled into the water bodies around the city. However, a unique consent decree...

Natural drainage prevents polluted runoff from harming the fish and other wildlife that call Longfellow Creek home. Seattle Public Utilities (SPU) is responsible for managing storm water throughout the city. There is use of a three-pronged approach to prevent sewage overflows: fix it first, keep...