Jacobs Engineering Group, Inc. 1/23/2026

Exhibit A (Scope of Work) Task 13 – Preliminary Design (30%) Plans and Estimate Submittal This task includes preparation of design roll plots, and an opinion of cost estimate based on the preferred alternative roadway improvements. 30% Plans Consultant design team will prepare 30% design level roll plots and submit them to the City. The design will be prepared to City CAD standards and to a level of competency presently maintained by practicing professionals in the field of transportation engineering in the Puget Sound Region. It is anticipated that the 30% roll plots will consist of the following design elements: • Alignment and Preliminary ROW • Site Preparation • Channelization • Roadway Improvements • Drainage Improvements • Traffic Signal Improvements • Lighting and ITS Improvements 30% Opinion of Cost Estimate Consultant design team will calculate 30% design level quantities and prepare an opinion of construction costs based upon the 30% construction plans and current unit bid prices. A contingency will be included to accommodate additional construction costs not yet specifically identified. Some lump sum and/or square-foot costs will be used for estimating portions of Project costs at this design level. 30% QA/QC of Deliverables An internal Consultant quality assurance/quality control review of deliverables will be conducted prior to submittal to the City. Assumptions: • The City will finalize the general geometric layout of the proposed improvements through the review of the 30% submittal. The layout will not be substantially modified in a later design phase. A substantial change in the layout will constitute a change in scope and will allow Consultant to negotiate additional compensation for the change. • City will provide estimate template for the opinion of cost.