2001 W MUKILTEO BLVD 2016-01-01 MF Import

� I �' Propond McCabe Residena Rentodel Everett, Washington Project No. 6(3-9701022 ` Page 10 11 � ! �� • � I,� � -f111 . 1 �I � �..� Temporary alope atability is e function of mmy fsctors, including the followinQ: • The prpence and abundat�ca of groundwater, • The type and density of du vacious soil stcate; • The depth of cut; • Surch�rge loadinas edjacent W t6e excavation; • The lenath of time the excavation tem�ine open. It is excadingly difficult uada the variable circumstances to pre�blish a safe and `tnaintenencafree" temporary cut slope aegla Tha�efore, it should be the responaibiliry of the contrector to maintein �efe tanporecy slope configuiations aince the wntiacwr is coatinuously at the job site, able to obxrve the mture and condition of the cut �lopes, md able to monitor the aubsurfia maUerials �ad groundwater condidons encountered. It may be nece�ery to drepe tempoary alopes throuQhout t6e site with plestic sheeting or otha means to protect the slopw finm the elemenb aad minimiae aloughing and erosion. Unsupported vedical slopes or cuts deeper thatt 4 feet are not recommended if worka axess is neces.cery. The cuts should be adequately sloped, shored, or suppornd to prevent injury to personnel from local sloughing and spalling. The excavation �kauld confoen to applicable Federal (OSHA), State (WISHA), and loca( rogulaGons. It is recommended that a!l pertnanent slopes be designed at a 2H:iV (Horimntel:Verticel) inclina6on or flatter. With slopes steeper then about 2H:1 V, topsoil erodes readily and it ia more difficult and time conswning to establish vegetarion for slope protxtion. Temporuy slopes in dente aoila ahoald be excavated at an inclinadon no steeper than lH:1V. Where perched groundwater condidons have saturated the surficiel soils, slope angles of 2.SH:1V to 3H:1V may be required for both ktnporary and pern►anent slope construction. � ��: ,� �.. �� :�:�� �.� �� .- •� :-..�� : „ Soils within the upper 4 to 7 feet across the site are loose, and in Grles' opinion, ia not suiteble for suppoct of shallow foundations. All footings should be founded on at least medium denx native �oils encountered about 4 to 7 fat below existing gTade or on compacted structural fill which is placxd sbove these native materials. Footings should not be founded on or within loose or disturbed nadve soil, topsoil, or undocumented fill meterial. The sensitivity to disturbance of the sit� soils mey requite that the footing excavations be covered with a lift of cn�shed rock or a lean concrete "mud mat" to miaimiu disturbance of the bearing surfacc during construcdon in wet weather or wet subgrade wnditions.