3210 36TH PL NE 2018-01-02 MF Import

GEOTECHNICAL ENGINEERI�'G SERVICES PROPOSED SMITH ISLAND BATCH PLANT EVERETT,WASHINGTON I I INTRODUCTION i This repori presents the results of our geotechnical engineering scrvices for the proposed Batch Plant that � will be located on Smith [sland in Everett, Washing[on. Thc project site is located on an approximately 20-acre parcel on the north end of Smith Island in Everett, Washington. The subject pruperty lies �vest of Staie Route 52) within the NE '/, of Section 5, To�anship 29N, and Range SE in the State of Washineton. Tlte sitc is shown rclativc ta surrounding physical fcatures on thc V'icinity Nlup, Figure l, and in [hc Site Plan, Pigure 2. PROJECT DESCRIPTION We understand that Concrete Nor'west is proposing to co��struct a nc�v batch plant and bulk aceregate storage facility on the site. The si[e is located on the south side of 36'�' Place NE and west of thc Burlington Northem Railroad (BNRR) tracks. As shown on figure 2, we undcrstand that the proposed facility will include: • Pill materials will bc imported lo the site to achieve grade across the batch plant lacation. Grades in the north half of the sitc will be raised by about 10 fect by placing imported structural fill such that the north half of the site will be graded to about Llevation I S feet. Gr�.des in the south half of the sitc �vill be raised by about 7 f'eet by placing strucWral till such that the south half of the site will be graded to about Llevation 12 feet. "fhe new fill pad will ha��e side slopes of abaut 3f L l V (horizontal:vertical). • A new batch plant (silo structure) with stacking and plant feed convcyors will be constructed on the nordi end of die site. The batch plant will be about 85 Fcet high. Pour base pads with loads of � about 119 ki� s each �vill be required to support the main silolbatcher structure. In addition to tLe i main silolbatcher swcture, a 200 ton aggregate storage structure and mixer assembly will bc canstructed. • The preliminary batch plant layout includes five aggregate srorage bins in the eastem part of the site and possible additional bullc aggregate storage stockpiles in Ihe southem half of the aite. Thc stockpiles may be up to 40 feet high. • Truck entrance and exit dncc�eays on the north property boundary to acccss 3G°i Place NE with additional huck driveway areas and parking loca;ed around thc proposed batch plant and aggregate storagc bins. • A stortmvater treatmcnt facility is planncd on the ��est sid= of the sitz. PURPOSE AND SCOPE OF SERVICES I The purpose of our services is to evaluate subsurface soil and ground��-ater conditions as a basis for developing desibm criteria for geotechnical aspects of the proposed Concrete Nor'�vest Smith Island Batch P�ant. Pield explorntions and laboratory tes[ing �sere perCormed to iden[ify and evaluate subsurface conditions across the site ia order to develop engineering recommendations for use in design of die projcct. Our serviccs were performed in general accordance with our proposal dated May 2, 2006. Written authorization to proceed with our initial services was provided by Concrete Nor'�vest on May 3, 200G. File Na.R9R7-004-00 paj,'�� GEOENGINEERS� n�tuh,�r ll. _'Onb _'f __ . . ,:.. : � f. J G ' v v �( P�y� y �'y� t�� `, A♦ 1 '{9 ,'.�M 1'� 'i . ' ' ��J. �' . .. �_��:i�� `��'.1'�t�Yk4��l , n��.. \ .. .�.Uf�'V