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1. Refinement of model components with greatest potential to improve calibration against <br />observed flow data (e.g., CSONet control strategies, combined/separated tributary areas; <br />CSO configurations and weir elevations; inflows from Bowman Creek, Clyde Creek; <br />stormwater basin configurations, etc.). <br />2. Validation of typical year output against results generated using the CHRS node time <br />series. <br />3. Use the refined collection system model to perform simulations of the following <br />scenarios: <br />a. Existing conditions (2015) model run for typical year rainfall <br />b. Current (2012) LTCP Phase 1 and Phase 2 model run for typical year rainfall <br />c. Current (2012) LTCP Phase 1 and Leeper Tank model run for typical year rainfall <br />4. Prepare a technical memorandum that provides a summary of results from the refined <br />collection system model simulations listed under Task 10.3. <br />Task 9 Deliverables <br />• Technical Memorandum - Updated Collection System Model and Baseline Simulation <br />Documentation. MHW will be responsible for production of this deliverable. <br />Task 9 Exclusions <br />• No field investigations (sewer inspections, surveys, flow monitoring) are included in this <br />scope. Should such investigations be determined to be necessary, MWH will notify the <br />City so that a plan for their performance can be developed. <br />Task 10 Optimization Analysis Planning (Lead Firm: EmNet) <br />Optimization technology allows for the efficient analysis of the performance of a large number <br />of potential combinations of improvement options. The improved model of the South Bend <br />collection system together with enhanced understanding of the limitations and costs of <br />alternative measures can be used as inputs to identify potential improvement plans that cost <br />effectively achieve the City's goals. EmNet will lead a collaborative discussion with project <br />team members to decide upon the framework to be used for the optimization and confirm the <br />inputs required to support the analysis. Potential scenarios include the optimization of <br />improvement alternatives to achieve either an established water quality goal or an established <br />goal for the number of overflows in a typical year. EmNet will prepare a technical memorandum <br />to document the adopted optimization plan. <br />South Bend LTCP Reevaluation - Phase 1C Amendment Page 4 <br />Revised 06/29/2016 <br />