Aspect Consulting LLC 4/11/2017 - Laserfiche WebLink

EXHIBIT A-1 Aspect VitCONSULTING March 10, 2017 Rich Hefti,P.E., Senior Engineer City of Everett Utilities 3200 Cedar Street Everett,Washington 98201 Re: Proposal for Geotechnical Engineering Services Water Main Replacement"S",UP NO. 3664 Grand Avenue between 19th Street and Hewett Avenue City of Everett,Washington Project No. 170095 Dear Mr. Hefti: As requested, Aspect Consulting, LLC (Aspect)has prepared this proposal for the City of Everett's (City)Water Main Replacement"S"Project(Project). The following proposal includes our project understanding, scope of work, cost estimate, schedule for completing the tasks and services,and our statement of qualifications specific to performing geotechnical engineering for utility-related projects. Project Understanding and Aspect's Related Experience The Project will replace approximately 4,800 feet of existing 3-inch and 6-inch aged cast iron water mains with new 8-inch-diameter,ductile iron main along Grand Avenue between 19th Street and Hewett Avenue. The work also includes removal or abandonment of valves, fire hydrants,water service lines(from mains to the shut off at the meter boxes),new water meter boxes and setters, related appurtenances and surface restoration.Under a separate project,the existing combined sewer and drainage system within this section are planned for replacement in the foreseeable future. Aspect's geotechnical engineering staff have significant experience in the City of Everett,having performed geotechnical engineering studies for many utility,roadway,and bridge replacement projects in the City. Subsurface Conditions and Construction Considerations Based on our experience,this upland area is underlain by glacially consolidated till and till-like material. Geologic mapping indicates the pipeline traverses along the contact of three different glacial deposits including Vashon till(Qvt),Vashon advance outwash(Qva),and Fraser to Pre- Fraser glaciation Transitional Beds(Qtb).Although three distinct geologic units,the deposits are fairly similar in composition and generally consist of unconsolidated to semi-consolidated mixtures of sediments generally ranging from clay-to gravel-size materials with occasional cobbles and boulders.