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5.1.4 <br />5.1.5 <br />Daily Volume of Water Pumped <br />The Minnesota Department of Natural Resources (MnDNR) permits high -capacity wells and <br />records total water use within wells deemed to be high capacity. All of the City of Ramsey wells <br />are considered high -capacity wells with an approved MnDNR appropriation permit. All yearly <br />water use is recorded within MnDNR's Water Permitting and reporting system (MPARS). <br />Additionally, The City of Ramsey has an approved Water Supply Plan (Third Generation for <br />2018-2028). <br />The City of Ramsey currently preferentially utilizes wells from their south-central well field that <br />includes wells 3 through 8. City Wells 1 and 2 are to the southeast of the primary well field and <br />has a decreasing utilization rate. Well locations are depicted on Figure 1 in Appendix D. <br />As discussed in Section 4, the average daily water demand from 2007 to 2017 ranged from 1.62 <br />to 1.92 million gallons (MGD). The maximum daily demand ranged from 4.1 to 5.5 MGD. The <br />projected annual average water demand for the City is expected to increase to 3.5 MGD and up <br />to a projected daily maximum of 10.2 MGD in the year 2040. <br />Aquifer Response to Well Pumping <br />Aquifer response to well pumping can be measured in many ways. The most common and <br />observable measurement within a well is through measurement of the drawdown, or change in <br />static water levels, and also through calculating the well specific capacity. These measurements <br />help to quantify water use within a well. As a well continues to pump it creates a radius of <br />influence where nearby water is drawn down into what is called a cone of depression. This <br />correlates to well interference and can have a combining effect when multiple high capacity wells <br />are pumping. These terms are discussed in the Minnesota Department of Health publication, "A <br />Guide to the Rules Relating to Wells and Borings" (Minnesota Rules, Chapter 4725). The <br />adjacent image from the handbook describes this terminology. The following sections will discuss <br />these terms in detail. <br />FEASIBILITY STUDY RAMSY 154354 <br />Page 17 <br />