TranTech Engineering LLC 5/15/2019

Task 3 Surveying & Mapping The CONSULTANT will perform site survey pertinent to the PROJECT.The east-west project limits along W. Mukilteo Blvd. will begin 20 feet west of the intersection with Greely Street and continue easterly to the west edge of the private access driveway to house#'s 1516, 1518, and 1520. The southerly limits will extend 25 feet south of the edge of pavement of W. Mukilteo Blvd. or to fence lines, whichever is nearest. Ordinary High-Water Mark flags may extend 50 feet south of the bridge face. The northerly limits will extend 25 feet north of the edge of pavement up to the BNSF parcel at which point the limits will be the north face of bridge and edge of pavement. Mapping will extend 25 feet beyond the extension of the edge of pavement for driveways. The north limits will also include mapping of the laydown area.The edge of tree lines and landscaping will be located as well as stand-alone trees within the area. Please see Exhibit A, Surveying Limits, below. Task 3.1 Survey PM, Admin, and QA/QC This task includes the survey project management, administrative duties, and quality control required for a project of this complexity and magnitude. Depending on the project requirements, 1 Alliance will assign a Survey Project Manager, Assistant Project Manager, and Survey Quality Leader for this project. Task 3.2 Survey Control This task includes the establishment of survey control, or the recovery of existing survey control, as required for the project. Typically, survey control will be set, found, or referenced utilizing Real Time Kinematic (RTK) GPS (GNSS) and the Washington State Reference Network (WSRN) in conformance with industry standards. This survey control is then typically propagated, as required, utilizing standard terrestrial total station measurements. Geodetic Survey Control Horizontal Maple Heights Bridge Seismic Retrofit 8