2111 ROSS AVE 2018-01-02 MF Import

1 I I REPORT GEOTECHNICAL ENGINEERING SERVICES WILDER CONSTRUCTION ASPHALT PLANT RELOCATION EVERETT, WASHINGTON FOR WILDER CONSTRUCTION: INTRODUCTION This report presents the results of our geotechnical engineering services for the Wilder Construction Company (Wilder) asphalt plant relocation in Everett, Washington. The asphalt plant will be relocated from 3315 - 15'h Street in Everett to the Smith Island area of Everett. The new site is located along the north side of Ross Avenue, just cast of the intersection of Ross Avenue with 35'l' Avenue Northeast, located about '/+ of a mile north of the existing asphalt plant. The, site is shown relative to surrounding physical features on the Vicinity Map, Figure I, and the Site Plan, Figure 2. PROJECT DESCRIPTION Our understanding of the project is based on a site plan provided by Wilder and a project meeting with representatives of Reid Middleton and Wilder. Primary components of the new asphalt plant will include: • Drum dryer, cold teed bin, rap feeder and baghouse (moderately loaded equipment); • Three, 200-ton storage silos over a 150-foot long platform scale; • An aggregate feeder (hopper) and several conveyor belts; • (2) 135-ton above grade asphalt storage tanks; • (1) 100-ton above grade storage tank; • Several large aggregate stockpiles; • An elevated control house, and prefabricated steel shop and material storage buildings; • Paved access road, parking, yard areas; and • Stormwater management facilities. We understand most of the equipment and the storage tanks will be founded on mat foundations or concrete slabs. Based on discussions among the design team members, 24-inch diameter augemst piles were selected for support of the three 200-ton storage silos. The buildings and conveyor belts will likely be supported on conventional shallow spread footings. The proposed Smith Island site is currently vacant pasture that is situated about 500 feet northeast of the Snohomish River. The site is bounded by Smith Slough to the north and cast, Ross Avenue to the South and Smith Avenue to the west. Current site grades generally range from Elevation 7 to Elevation 9 feet, but fill will be placed as part of the project to establish prevailing site grades at about Elevation 11 to 15 feet. G e o E n g i n e e r s I File No. 3101-020-00\072502 u