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' . <br /> E-3592-610 <br /> ':•-�:` OmniPian Page 10 <br /> July 9, 1996 <br /> The following pavement section for Ilghtly-loaded aroas can be usecl: <br /> • Two inches of asphalt concreto (AC) over faur Inches of crushed rock base (CRBy <br /> material, or <br /> • 7wo inches of AC over threo inch�s of asphalt treated base IATB) material. <br /> Heavier truck-traffic areas will require thicker sections de�ending upon site usage, <br /> pavement life and sito tra(flc. As a fleneral rule, tho following sections can be considerod <br /> for truck-trafficked aroas: <br /> • Three inches of AC ovet six inches of CRB, or <br /> • Three inches ot AC over four inches of A78, <br /> All pavement materiais should confvrm to WSDOT specifications. The use of a Class B <br /> �. asphait mlx Is suggested. <br /> �yL�onort an�kfi�l <br /> The structural fill beinc� used to ralse sito grades should provide adequate support for <br /> utilities. <br /> Utility trench backf���rti u arlya� pavement areas cl I�Ishlmportan�t that each s ctioln of <br /> utility allgnments, p <br /> utility line be adequately supported in the be d din c� material. Ttie material should be han <br /> i a before <br /> temped to ensuro support ia Provlded around the pipe haunches, Fill should be careful y <br /> placed and har�d tAmped to about twelve (121 Inches above the crown of the p'P <br /> anyho�a�eco Ce��i�lifts havngta loo e9thickne seof less thalntwelvehl�tzl inches.kfil�l <br /> sho� p <br /> typlcal t�eo t nbaa eals is presented on Plate�3,requirements for I�ad supporting an non- <br /> load supp fl <br /> EMh Con�ultonte, Ino, <br />