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Comprehensive Water Plan City of Arden Hills, MN WSB Project No. 3455-20 PAGE 1 EXECUTIVE SUMMARY Introduction The City of Arden Hills’ Comprehensive Water Supply Plan describes the City’s existing water distribution system and water demand, projects future water demand through the year 2040, and proposes infrastructure improvements to meet that demand. This Plan has been prepared according to the guidelines established by the Metropolitan Council and the Minnesota Department of Natural Resources (DNR). The Water Supply Plan immediately following this report follows the template provided by the DNR, while this Comprehensive Water Supply Plan expands upon the template and provides further information for City and Metropolitan Council planning. Existing System The City of Arden Hills’ water distribution system provides over 300 million gallons of water each year to approximately 2,600 service connections. The City purchases its water from the City of Roseville, which in turn purchases it from Saint Paul Regional Water Services (SPRWS). The treated water received through three service connections along the southern boundary of the City is distributed in two pressure zones, south and north. Each pressure zone has one water tower, and a booster station located beside the South Tower supplies the north pressure zone. Population and Water Demand The population of the City of Arden Hills has been growing steadily since 2008. Despite this growth, total water use and per capita water use in the City have been decreasing since 2012. High efficiency appliances, decreased irrigation, general attitudes toward conservation, rainfall and climate likely all play a role in these trends. Growth and Demand Projections The Metropolitan Council projects that the City of Arden Hills wi ll continue to develop and grow over the lifetime of this Plan. The population served by the City of Arden Hills’ water distribution system is expected to increase to 13,500 people by the year 2040, at which time the projected total per capita water use of 123 gallons per capita per day will result in an average day demand of 2.41 million gallons per day and a maximum day demand of 7.23 million gallons per day. Proposed Improvements In addition to regular system maintenance and rehabilitation, the development of the TCAAP site in the north part of the City will require significant improvements to the water supply system. The recommended improvements include the installation of a new booster station, the extension of trunk watermain, and the construction of a new one million gallon water tower. Dr a f t 11 / 2 0 / 2 0 1 7