The 110th St. Cascade project, completed in 2003, is located ten blocks south of SEA Street in Seattle's Piper’s Creek watershed.

This Natural Drainage System (NDS) project redesigns a multi-block section of unimproved, residential streets between two main traffic arterials - Greenwood Ave. N. and 3rd Ave. NW.

NW 110th St. slopes significantly downhill to the west, creating additional challenges for natural drainage system designers and engineers.