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Local Water Supply Plan Template –July 8, 2016 12 Complete Table 5 with information about storage structures. Describe the type (i.e. elevated, ground, etc.), the storage capacity of each type of structure, the year each structure was constructed, and the primary material for each structure. Add rows to the table as needed. Table 5. Storage capacity, as of the end of the last calendar year Structure Name Type of Storage Structure Year Constructed Primary Material Storage Capacity (Gallons) North Tower Elevated storage 1968 Steel 500,000 South Tower Elevated Storage 1986 Steel 1,000,000 Total NA NA NA 1,500,000 Treatment and storage capacity versus demand It is recommended that total storage equal or exceed the average daily demand. Discuss the difference between current storage and treatment capacity versus the water supplier’s projected average water demand over the next 10 years (see Table 7 for projected water demand): The City of Arden Hills currently has 1.5 MG of storage between two elevated storage tanks. Ten State Standards recommends that a city’s storage capacity be equal to or greater than the average day demand. From 2010 to 2015, the average day demand was 1.10 MG; the City’s current storage capacity exceeds the average day demand by 0.40 MG. It is anticipated that the highest average day demand over the proceeding ten years will be approximately 2.13 MG, which will require additional storage capacity. The City proposes to add a 1.0 MG elevated storage facility in the northern section of the City. The City purchases water from the City of Roseville, who directly purchases the water from the Saint Paul Regional Water Utility Service (SPRWS). C. Water Sources Complete Table 6 by listing all types of water sources that supply water to the system, including groundwater, surface water, interconnections with other water suppliers, or others. Provide the name of each source (aquifer name, river or lake name, name of interconnecting water supplier) and the Minnesota unique well number or intake ID, as appropriate. Report the year the source was installed or established and the current capacity. Provide information about the depth of all wells. Describe the status of the source (active, inactive, emergency only, retail/wholesale interconnection) and if the source facilities have a dedicated emergency power source. Add rows to the table as needed for each installation. Include copies of well records and maintenance summary for each well that has occurred since your last approved plan in Appendix 1. Dr a f t 11 / 2 0 / 2 0 1 7