Brown and Caldwell, Inc. 10/28/2025

WPCF Headworks Replacement Project Scope of Work 32 Task Assumptions All estimates will meet the estimating class criteria established by the AACEI. AACEI Class 3 estimate- assumes a range of -20% to +30% based on preliminary design documents. AACEI Class 1 estimates assumes a range of -10% to +15% based on final design documents. The Class 1 final design estimate will serve as a reference point for City comparison against the GC/CM guaranteed maximum price (GMP). The GC/CM will be responsible for developing an independent estimate for this work package. City Responsibilities Provide input on discretionary items and contingencies assumed for cost estimates. Meetings None Work Products Sketches and takeoff documents as needed to support development of cost estimates. Deliverables AACEI Class 3 estimates based on preliminary design documents, including a Basis of Estimate report. AACEI Class 1 estimate based on the final design documents including a Basis of Estimate report. Task 355 Headworks Preliminary Design Objective: Work under Tasks 355 involves the development of a Class 3 cost estimates for the preliminary headworks design developed under Phase 600. Activities/Approach Review the headworks preliminary design technical documentation. Identify key cost drivers, quantities, and assumptions for each element of the design. Develop an AACEI Class 3 construction cost estimate for complete project construction cost, including direct and indirect costs, contingencies, and allowances. Develop an estimated construction schedule based on the scope of work reflected in the headworks preliminary design. Task Assumptions AACEI Class 3 estimate- assumes a range of -20% to +30% based on preliminary design documents. City Responsibilities Provide input on discretionary items and contingencies assumed for cost estimates. Meetings None