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e �' 11 V YA �Eo�CIE���� 1��. <br />' � �,, � � � � � � <br />! <br />September 21, 201_5 <br />HWA Pz•oject No. 2014-090-21 <br />KI'FF Consulting Engineers <br />1601 Fifth Avenue <br />Suite 1600 <br />Seattle, Washington 98101 <br />Attention: Tom Whiteman, P.E. <br />i�vi1 � 5 G' �t - (� ?..�5 <br />Subject: Geotechnical Exploration Plan <br />Grand Avenue Pedestrian Bi•idge and Associated Utilities <br />Everett, Washington <br />Dear Tom: <br />HWA GeoSciences Inc. (HWA) is planning to conduct our last phase (Phase 4) of �eld <br />explorations program in support of the design of the temporary support structures for the Grand <br />Avenue Pedestrian Bridge and Associated Utilities Project. We have generated this narrative to <br />convey the specifics of our proposed explorations to the City of Everett for approval. <br />Phase 4 of the eYploration program will consist of one boring to be drillcd within the City right <br />of way. The approximate location of the proposed exploration is indicated in the proposed <br />exploration plan, Figure 1. <br />Pliase 4 Explorations <br />(City of Everett Right of Way): HWA proposes to drill one limited access borings within the <br />City right of way. This boring, designated BH-3, will be drilled east of West Marine View Drive <br />and wcst of BNSF right of way. Boring BH-3 will be drilled to a depth of 25 feet below ground <br />surface to provide bearing capacity infot•ination for the proposed temporary bridge suppor•t <br />column. Thc approximate location of this exploration is indicated in Figure 1. HWA proposes <br />to utilize Geologic Drill's Bobcat mounted, drill rig (picture of drill z�ig shown in Appendix A, <br />Fi�ure A-1) litilizing hollow stem auger drilling methods. We anticipate that completion of this <br />boring will take between 2 and 3 hours. Thc boring operation will be logged by our geologist, <br />and environniental samples will be collected by Landau and <br />Associates. <br />As the proposed boring is to be located near tlle West Marine View <br />Drive, HWA proposed to utilize shoulder worlc signage along West <br />Marine View Drive to notify vehicular traffic of the worlc. HWA's <br />proposed traffic control plan for these etplorations is provided in <br />21312 30t1i Dri��c SE <br />s�,tc� i io <br />I3othc1l, \NA 98021.7010 <br />1e1: 425.774A 106 <br />Pas: �125.774.271�k <br />w�vw.invagca.com <br />��Q <br />