Laserfiche WebLink
City of Tukwila My WebLink |HelpSearch Tips |About |Sign Out
TUKWILA COMPREHENSIVE PLAN <br />Earth Resources and Geolo is Hazards <br />The Citv_has mapped areas with steep_and unstable slopes,_includi_ <br />active landslide areas and springs to ensure that there is adequate review of <br />slope stability, if develo+ment is r ro,osed m these areas. In addition, there <br />are coal formations on the southwest side of Interurban Avenue South, <br />some of which have been mined and are defi_nedas sensitive areas based <br />on City ofTukwila _ Abandoned Underground Coal Mine Hazard <br />Assessment, May 1990. <br />Water Quality <br />Although the City does not have ongoing monitoring programs periodic <br />studies have indicated that Tukwila's streams and the Green/Duwamish <br />River suffer from poor water qualitydue to surface water runoff. Rain <br />events wash contaminants off of rooftops driveways,sidewalksyparking <br />lots, and roads into the watercourses. Runoff from these areas can <br />contribute to high temperatures in urban streams and can carry <br />contaminants into streams and wetlands. Many„newer developments have <br />flow control_au_d_water_quality treatment facilities such_as sediment <br />removal and oil water separators that moderate the discharges that flow <br />µpea there are areas of Tukwila where runoff from <br />directly into streams but utt <br />impervious surfaces_ discharges directly to streams and the river with no <br />treatment.,__(See background report for more information on water quality.) <br />Riparian habitat_plays as valuable role in protectin stream water quality_„ <br />Adequately-sized and healthy riparian buffers help filter out avariety_of <br />pollutants„including substances that can lead tothe depletion of oxygen ill <br />streams Riparian vegetation can also shade streams reducing water_ <br />temperatures However., most of Tukwila's streams have oor c ualit <br />narrow ri .arian areas. <br />Air Ouality <br />The Natural Environment <br />Tukwila lies in the air quality region made up of King, Kitsap, Pierce, and <br />Snohomish counties. Air quality is monitored and managed by the Puget, <br />Sound Clean Air _Agenc Through the effort of the Clean Air Agent, <br />all of King_County currently has good air quathy„ except for_occasional <br />periods when air quality in our area is considered a risk to health, <br />particularly for members of the population with respiratory conditions. <br />Climate Change <br />The impacts of climate change in Tukwila could affect several aspects of <br />the natural environment as well as the provision of utilities to its citizens. <br />December <br />2013 <br />9 <br />