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H. Natural Features and Sensitive Areas <br />There is a topography change between the western portion of the site and the lower side <br />along Tukwila International Blvd. A north south retaining wall is proposed along the <br />grade change. <br />I. Surface Stormwater detention facilities <br />An underground vault is proposed under the parking area. Also, surface water from the <br />roof is directed to two rain gardens; one along the east side of the proposed building and <br />the second one along the west side. A rain garden allows for the opportunity for plants to <br />absorb runoff storm water that would otherwise be directed to downstream drainages. <br />The cross sections for the rain garden are shown on Sheet C4 of 9. The proposed plants <br />in the rain garden areas are shown on the landscaping plan. <br />J. Pedestrian circulation <br />A pedestrian plaza is proposed to connect the building entrance to the sidewalk. A <br />continuous sidewalk along Tukwila International Blvd will provide north south pedestrian <br />connection. Also, a sidewalk is proposed along the south property line along S. 148th St. <br />K. Pedestrian Amenities <br />The landscape plan shows textured paving in the plaza area, which shall provide interest <br />and enliven the pedestrian plaza. However the civil plans need to be revised to show the <br />textured paving. Additionally, the applicant has proposed two benches, raised planters <br />and a bike rack in the plaza area. See Attachment C for details of the bench and the bike <br />rack. <br />The guidelines in the Design Manual envision a lively and vibrant pedestrian place. <br />However there have been previous safety concerns with benches along Tukwila <br />International Blvd. One option may be for the applicant to design planter boxes instead <br />of the benches or locate the benches so that they give the appearance of private seating <br />as opposed to seating in a public space. <br />L. Vehicular Circulation <br />There are two access driveways proposed along Tukwila International Blvd, and these <br />will be shared by the existing businesses on the property and the new proposed building. <br />Page 5 of 11 <br />9 <br />