The City of Bellevue selected SvR Design Company to develop the City’s Natural Drainage Practices Maintenance Guidelines. The guidelines address the routine and triggered maintenance associated with rain gardens and stormwater planters; porous pavement; vegetated roofs; rain recycling; and amended soils. The document features links to a variety of resources, including information from the City of Seattle, King County, and Washington State University. The guidelines were funded by a King County Conservation Grant. You can view the guidelines on our Resources page.