Agenda - Council - 10/08/2019 - Laserfiche WebLink

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C1.6 Assessment of Data Elements C1.6.1 Use of the Municipal Wells Ramsey currently has eight municipal water supply wells in the municipal water supply and distribution system for Public Water Supply 1020035. Locations of the wells are shown on Figure C-land construction details for the Ramsey municipal wells are summarized in Table C-1 . Copies of the MDH well records for these wells are presented in Appendix A. The 2010 census indicated that Ramsey had a population of 23,668. In 2017 the population of Ramsey was estimated to be 25,581 and it was estimate that the water system served 13,270 people. The City's draft Water Supply Plan (Ramsey, 2018a) projects that the City's water supply system will serve 13,921 people in 2020 and 22,987 in 2030. The draft Water Supply Plan projects the City's total population in 2030 will be 33,350. As discussed above, the City's average day water demand in 2017 was 1.92 MGD and the projected 2030 average day demand is 3.01 MGD (approximately 2,090 gpm) with a projected population served of 22,987. For the period 2010-2017, daily demand on the Ramsey water system averaged about 1.7 MGD. Ramsey currently has a permitted annual groundwater appropriation of 850 MGY. The permitted instantaneous total pumping rate for the Ramsey system is 8,200 gpm. Ramsey currently has three elevated water storage facilities. These facilities have a combined storage capacity of 4.0 MG. Construction of additional water storage facilities is not currently planned (e.g., Ramsey, 2018a). C1.6.2 Wellhead Protection Area Criteria Delineation of the WH PAs for the Ramsey wells was completed in 2018. Information/criteria used to perform the WHPA/DWSMA delineations are discussed in the Part 1 WHPP amendment prepared by the MDH (2018) and are summarized below. C1.6.2.1 Time of Travel A 10-year groundwater time of travel capture zone for each of the City's wells was delineated but it was determined that capture zones for a 12-year time of travel would still be contained within the boundaries of the DWSMAs previously delineated for the Ramsey wells (MDH, 2018). The individual capture zones were combined into composite capture zones that were used to delineate the DWSMAs. The one-year groundwater time of travel capture zones for the City's wells was determined in a similar manner. C1.6.2.2 Aquifer Transmissivity Transmissivity of the Tunnel City-Wonewoc aquifer used to delineate the WHPAs for the City's wells was unchanged from that used in the previous (2007) delineations (MDH, 2018). C-11