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Water Distribution System Hydraulic Model Calibration and System Evaluation Report <br /> Chapter 4 – Water Demand Allocation <br /> December 2019 <br /> <br /> <br />P05049-2019-000 Page 14 <br /> <br />4.3 Existing System Demands <br />The demands used within the hydraulic model for the existing system are presented in Table <br />4.1. These demands can be used to evaluate the existing system because they are representative <br />of previous usage patterns experienced historically. Based on historical flow meter data <br />provided by Roseville, the demand for Arden Hills was assumed to be 20% of the demand <br />served by the Roseville Booster Station. Using the projected population from the Arden Hills <br />Draft 2040 Comp Plan and the flow meter data, the usage was converted to gallons per capita <br />per day (gpcd) and million gallons per day (MGD). <br />Arden Hills Population <br />(2018 projected) <br />9,919 people <br />Average Day Demand (ADD) 99.6 gpcd 1.0 MGD <br />Maximum Day Demand (MDD) 246.4 gpcd <br />w/ 2.5 peaking factor <br />2.5 MGD <br />Table 4.1: Existing System Demands <br />