Changes

Please see below a plan and profile view of a rain garden, which possesses full infiltration and bioretention functions. In the plan view, note that the contributing area has water coming from both the building's roof, and paved areas, along with the driveway and directed towards the lowest area of the property, where the rain garden is located. This allows the feature to collect and to easily absorb rain and surface water into the ground on homeowners/businesses' properties. The installation also includes a pretreatment rock/concrete forebay to limit erosion and reduce higher velocity flows entering the rain garden, along with mulch, filter media and various planting zones with specific vegetation types that are best suited for these areas within the feature to assist in infiltration and removal of contaminants.

Please see below a plan and profile view of a rain garden, which possesses full infiltration and bioretention functions. In the plan view, note that the contributing area has water coming from both the building's roof, and paved areas, along with the driveway and directed towards the lowest area of the property, where the rain garden is located. This allows the feature to collect and to easily absorb rain and surface water into the ground on homeowners/businesses' properties. The installation also includes a pretreatment rock/concrete forebay to limit erosion and reduce higher velocity flows entering the rain garden, along with mulch, filter media and various planting zones with specific vegetation types that are best suited for these areas within the feature to assist in infiltration and removal of contaminants.

Drawings are from the [https://www.cityofvancouver.us/publicworks/page/surface-waterstormwater-design-construction-requirements City of Vancouver's Surface Water/Stormwater Design & Construction Requirements] document. For further details about these cross section drawings please visit the link.

Drawings are from the [https://www.cityofvancouver.us/publicworks/page/surface-waterstormwater-design-construction-requirements City of Vancouver's Surface Water/Stormwater Design & Construction Requirements] document.<ref>https://www.cityofvancouver.us/publicworks/page/surface-waterstormwater-design-construction-requirements</ref> For further details about these cross section drawings please visit the link.