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RAMSEY TCAAP Site Redevelopment COUNTY ART,HU- Infrastructure Memorandum Date: August 11, 2014 To: Terry Maurer, Public Works Director From: Thomas J. Lincoln, Kimley-Horn Matt Bowers, Wenck Subject: TCAAP Water and Sanitary Sewer Systems Review The purpose of this memo is to outline the preliminary design process for the water and sanitary sewer system design that Ramsey County has initiated for the TCAAP site.The purpose of the August 11 work session meeting with the Arden Hills City Council to provide an opportunity for the Council to provide input on the public utility infrastructure during the early stage of the design process. Design Development Scenario In order to design the water and sanitary sewer systems,we need to develop the maximum design development scenario. This was done as a part of the AUAR process and further refined by staff: • 1700 residential dwelling units • 550,000 SF of retail • 1,450,000 SF of general office • 350,000 SF of warehouse • 150,000 SF of general light industrial Water System Design The water system design has two major tasks-developing a water model for the City and designing a water system that will provide the domestic and fire flows for the design development scenario. Water Modeling • Data collection of existing Arden Hills water system -the pipe network and use and flow data • Construction of a water model for the existing water system and connections to the City of Roseville system • After initial water model development is completed, it will be calibrated against actual data that is available for the existing system (e.g., measured water system pressures and fire flows) • Concurrent with the development of the calibrated model ,we will met with the City of Roseville to discuss the existing water service agreement, and to provide verification that an adequate water supply can be provided 1