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07-06-2020 Council Work Session Packet
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07-06-2020 Council Work Session Packet
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12/2/2021 2:38:35 PM
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City Council
Council Document Type
Council Packet
Meeting Date
07/06/2020
Council Meeting Type
Work Session Regular
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Feasibility Study <br />Water Treatment Plant <br />City of Lino Lakes, MN <br />WSB Project No. 015822-000 Page 1 <br />EXECUTIVE SUMMARY <br />WSB was authorized to complete this Water Treatment Plant Feasibility Study for the City of Lino Lakes. <br />The Minnesota Department of Health recently tested the City’s manganese levels in each of the City’s <br />wells as part of the EPA Unregulated Contaminant Monitoring Rule 4 (UCMR4). The water quality testing <br />data from MDH indicates that five of the City’s six wells exceed the maximum recommended manganese <br />level for infants, and three of the wells exceeds the maximum recommend level for adults and children. <br />The purpose of this feasibility study was to evaluate alternative water supply options to address the high <br />manganese levels in the City’s drinking water to provide acceptable water quality that meets current and <br />proposed drinking water standards. These options include drilling new wells, purchasing treated water <br />from another community or water system, and implementing treatment. <br />The option to implement treatment was the primary focus of this study. Based on the City’s water demand <br />projections, initial and future plant capacities were determined for treating the City’s central well field and <br />future wells. A property located near the intersection of Birch Street and 12th Avenue South was <br />evaluated as a potential site for a water treatment facility. <br />Water samples were obtained and analyzed for other health related compounds that are currently being <br />monitored by MDH to plan for additional treatment beyond manganese, iron, and ammonia if needed. <br />Based on all of the water quality data obtained from each of the City’s wells, WSB reviewed the available <br />treatment technologies and recommended the most feasible option to treat the City’s water. A preliminary <br />conceptual site plan was developed and used to determine the acreage needed for the plant. <br />After determining the plant size, recommended location, conceptual site plan layout, and acreage <br />needed, cost estimates were developed for the proposed water treatment plant. Included in these cost <br />estimates are the raw watermains from the wells located in the central well field and the treated water <br />distribution mains for the recommended site. An approximate water rate increase, funding options, and <br />final recommendations for the proposed water treatment facility are also presented in this report. This <br />project is feasible, necessary, and cost effective from an engineering standpoint and should be <br />constructed as proposed herein.
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