Broadway
The city of Seattle has employed the SEASTREET model in other retrofits, such as the Broadway Grid project. See below:
This design of stormwater management filters stormwater through planted environments, in lined channels on either side of the street. Stormwater from approximately 21 acres is managed by this project. This system was designed for a peak 25 year storm load of 18 cfs. While official data are pending, results are expected to be exemplary with regard to TSS and nutrient retention. Note that the sidewalk and access road have been reduced to decrease the impervious surface.
For more information, please see the Seattle Public Utilities Page
The newly published (1/05) "LID manual, technical guidance manual for Puget Sound"(WA.) which gives an overview of this project (p. 180) as well as a comprehensive technology overview, design, plantings and performance of BMP's relevant for Seattle.
Photos courtesy of :
Mary Knackstedt
Environmental Education Specialist
Puget Sound Action Team
Office of the Governor (Washington)
360-725-5457