Agenda - Public Works Committee - 09/17/2019

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city. These restrictions may include limits on lawn and garden sprinkling, irrigation, car washing, air conditioning and other uses. In the next ten years it is possible that new business or industrial developments in or near the Ramsey DWSMAs may seek to construct privately- aquifer. Such wells could potentially affect the DWSMA boundaries, depending on their location and pumping rate. At the time this Plan was prepared, the City was not aware of any proposed developments with plans for privately-owned high capacity wells within or near the DWSMAs. indicates that there are 31 high capacity wells within a zone that includes the Ramsey DWSMAs and extends one mile beyond the DWSMA boundaries (this number does not include the eight Ramsey municipal supply wells). High capacity wells are defined as wells that pump more than 1,000,000 gallons per year or more than 10,000 gallons per day. Owners of these wells are required to obtain a groundwater appropriation permit from the MDNR. High capacity wells outside of the DWSMAs were identified because changes in operation of these wells could, potentially, affect the DWSMA boundaries. Of these 31 non-Ramsey municipal supply wells, 21 are used for pollution containment, four are used for some type of irrigation, four are used for municipal water supply, one is used for non-metallic processing, and one is used for HVAC. The high capacity wells in the DWSMAs and within one mile of the boundaries of the DWSMAs are shown on Figure 4 and summarized in Table 4. Additional information on these wells can be found in Appendix C. Beyond the future operation of the Ramsey municipal wells and anticipated installation of two additional municipal water supply wells, no significant changes regarding groundwater use within or near the DWSMAs are anticipated to occur within the next ten years. 4.2Impact of Changes 4.2.1Water Use Current daily water demand (based on the period 2013-2017) averages approximately 1.7MGD. Maximum day demand (the largest daily water use in a given year) ranged from approximately 4.4 MGD to approximately 5.4 MGD in the period 2013-2017 (Ramsey, 2018a). currently supplied with water from eight wells with a total permitted operating capacity of 8,200 gpm (11.8 MGD). draft Water Supply Plan (Ramsey, 2018a) projects the daily average water demand in 2030 will be approximately 3.01 MGD (approximately 2,090 gpm)and the 2030 maximum day water demand will be approximately 8.7 MGD (approximately 6,060 gpm). As noted above, the City anticipates the addition of two wells to the water supply system by 2030. Addition of wells to the water supply system will require and assessment to determine if the boundaries of the DWSMAs will need to be modified. This will be done when the City is directed to do so by the MDH. 12 12