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Draft Chapter 18.28 Tukwila Urban Center (TUC) District <br />a. Landscape perimeter trees should be selected for compatibility with existing plant material or <br />street trees. <br />b. Plant materials should always be incorporated into new development site design to provide <br />"softening" of hard paving and building surfaces and other environmental benefits. <br />c. Drought resistant species are encouraged in order to minimize irrigation reauirements. except <br />where site conditions within the required landscape areas assure adequate moisture for <br />growth. <br />d. The mature size of selected tree species should be suitable to lot size, the scale of adjacent <br />structures, and the proximity to utility lines. <br />e. Both seasonal and year -round flowering shrubs and trees should be used where they can be <br />most appreciated adjacent to walks and recreational areas, or as a frame for building <br />entrances and stairs. <br />f. In general, deciduous trees with open branching structures are recommended to ensure <br />visibility to retail establishments. More substantial shade trees are recommended in front of <br />private residences. <br />g. All trees should be selected and located so that they will not obstruct views to showroom <br />windows and building signage as they mature. Trees may be limbed up to preserve views, <br />except that no more than 1/3 of the canopy may be removed in any two year period. <br />h. Evergreen landscaping is appropriate for screening utility vaults, loading docks and some <br />storage areas (Also, see TMC Chapter 18.52.040 screening outdoor storage areas). <br />w,u <br />ffllf Yl r <br />N <br />Figure 24 Using evergreen landscaping to screen utilities <br />131s ^o i4+ _s'.nSkldi }r,v-264 6.,,2d' IC2vS <br />n, !rsss 5 s2 pavt.v 5. ".c, sufl L'u!a... an' Ir5's rr lnvt:vn hrz_ <br />uusSrb2d by a sin0l2 tr22-. Species selection is very important in grouped plantings. Drought <br />tolerant species are strongly recommended and monoculture plantings are discouraged. Low <br />maintenance cost and low replacement costs are two advantages of planting drought tolerant <br />species in grouped configurations. Low (24 -30 inches) shrubs, perennial or groundcover <br />W: \Long Range Projects \Southcenter Plan \Plan 2011 \13ook 2 \FINAL PC BOOK26.12.12with markups.docx Page 55 6/21/2012 <br />Comment [NG7]: There are already standards <br />for the number of plants required in landscape <br />areas. <br />59 <br />