Explanation
1. BACKGROUND: This legislation authorizes the Director of Public Utilities to enter into a professional engineering services agreement with Arcadis U.S., Inc. for the Sewer System Capacity Model Update 2020 Project, CIP 650460-100002 for the Division of Sewerage and Drainage. The initial contract covers work for the first year with four subsequent planned annual contract modifications.
The sewer collection system model developed and enhanced by the Model Update Project, is the principle tool used to manage the planning and operations of the City’s sewer collection system. Enhancement of this tool is vital to minimizing sewer overflows and backups and thereby minimizing negative impacts to the environment caused by the City’s sewer system. The continual updating of this model is necessary to ensure compliance with the Ohio Environmental Protection Agency's Consent Orders.
The City’s system-wide sanitary and combined system models have been developed since the late 1980s’ and recently updated under the Sewer System Capacity Model Update 2012 (SSCM 2012) project. All current models use PCSWMM ( PC based Storm water Management Modeling software) as the user interface platform and SWMM5 as the modeling engine. These models are categorized into Detailed Models and Reduced Pipe Models (RPMs). Detail models represent sanitary sewers of 8 inch and larger in all Blueprint areas and 12 inch and larger outside Blueprint areas, and combined sewers of 12 inch and larger. The RPMs represent the backbone of the collection system and have been used as a tool for planning purposes.
The SSCM 2020 project will enhance the City’s existing system-wide sewer collection models and apply them to support the Blueprint Columbus Program, operation & maintenance (O&M) of the collection system, operation of two Wastewater Treatment Plants, Capital Improvement Projects (CIPs), real time control initiatives (RTC) and sewer capacity evaluations. The selected consultant...
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