Brown and Caldwell Inc 8/27/2019

Task Assumptions The scope for this task assumes that the hydraulic model developed previously will be updated to include known process changes identified by plant staff since 2002. Model updates are assumed to be limited to desktop modifications based on input from the City; the scope includes up to 20 hours for this effort. Updates required to account for unknown hydraulic limitations (e.g. degraded piping or conduits, partially-closed valves, etc.) are outside of the current scope. The updated hydraulic model will be used to develop the hydraulic profile through the plant based on the plant's nominal capacity under a rapid rate filtration flow regime (10 gpm/sf). Hydraulic Profile Assessment TM is anticipated to be approximately 15 pages, excluding appendices. It is assumed that the City will collect water level and flow data needed for model calibration. Everett Responsibilities Collect water level data at up to 4 locations (Lake Chaplain,flocculators, filters, clearwell)for 2 flow conditions (low flow, high flow), to be determined in consultation with BC. Provide information on relevant plant conditions (e.g. valve settings, weir depth settings, etc.) at the time of data collection. Work Products Hydraulic Profile Assessment TM, draft and final. Task 107 - Capital Improvement Program Objective: Develop a list of potential critical projects for near-term (i.e., 1-10 year) and long-term (11- 20 year) implementation. Screen, rank, and prioritize projects based on agreed on criteria. Develop a schedule loaded priority CIP for project planning and financing. Activities/Approach: This task includes the following activities: Develop list of potential improvement needs and criticality. Develop recommended screening criteria. Based on the results of the condition, criticality, and engineering assessments in preceding tasks, prepare for and conduct an Improvements Screening and Ranking Workshop with Everett staff to verify screening criteria and brainstorm and prioritize potential improvement projects. Perform screening and feasibility analysis of prospective projects identified in brainstorming. Adapt an existing BC decision model for evaluating and ranking potential improvement projects (potentially including estimated capital costs, quantitative or qualitative 0&M costs/efforts, probabilistic risks and risk costs, and other considerations identified by the project team) Prepare for and conduct a CIP Development Workshop to review initial project feasibility and ranking and to prepare short list of up to 40 projects for further development with planning-level scope, cost estimating, and incorporation into a preliminary CIP schedule. Develop planning-level scopes and cost estimates for identified projects, and a schedule for CIP implementation. Develop and submit a draft CIP TM. Revise draft based on City comments, and submit a final CIP TM. Page 21 (Form Approved by City Attorney's Office November 1,2009)