This Natural Drainage Systems (NDS) project spans 16 blocks of a residential neighborhood in northwest Seattle. The project is located adjacent to the 110th Cascade Project, within the Pipers Creek watershed. The SEA Street prototype project is located in the same watershed, just 10 blocks to the north of the Broadview Green Grid.

The virtual tour shows selected locations within the extensive project area. Before construction, the informal drainage network carried stormwater runoff through a series of ditches and culverts down the hillside toward Pipers Creek, causing erosion and impeding absorption of rainwater by the landscape.