Professional Services Agreement - MWH America - CSO LTCP Reassessment Phase 1C

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AMENDMENT TO AGREEMENT BETWEEN OWNER AND ENGINEER FOR PROFESSIONAL SERVICES The Board of Public Works, City of South Bend, Indiana ("Owner") and MWH Americas, Inc. ("Engineer") entered into an agreement for professional services ("Agreement") effective February 10, 2015 for services relating to: South Bend Combined Sewer Overflow (CSO) Long Tenn Control Plan (LTCP) Integrated Planning Reevaluation ("Project"). The Agreement is hereby amended to include additional services as described below. These additional services comprise Phase 1 C of the Project as described in this Amendment. This Amendment is effective as of 1Z , 2v/1, ("Effective Date"). Phase 1C Introduction and Overview Over the past 15 months, the City's Consultant Team has completed the Phase lA/lB reevaluation of the 2012 Long Term Control Plan incorporated into the City's current CSO consent decree. The work done to date has resulted in an update of estimated costs for construction of the remaining LTCP projects, refinement of the collection system and water quality models used to analyze potential management strategies, identification of cost saving conceptual alternatives to the current LTCP, and formulation of an initial strategy for modifications or wholesale changes to the City's current LTCP that would achieve the goals of this effort at a reduced cost to South Bend. The goals of the proposed Phase 1 C Scope of Work are to: • refine the City's collection system model to further improve its ability to accurately predict system performance and support optimization analyses; • investigate the potential for enhancement of the collection system model through integration of Cognitive Hydraulic Response System features and linkages to the St. Joseph River water quality model; • develop cost functions for the construction of various LTCP alternatives that can be incorporated into the model being used for system optimization; • formulate and implement an optimization analysis of LTCP alternatives to provide insight into the potential for further reduction of program costs through refinements to the LTCP or changes in the target level of service; and South Bend LTCP Reevaluation - Phase 1C Amendment Page 1 Revised 06/29/2016