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<br />Comprehensive Water Plan <br />City of Arden Hills, MN <br />WSB Project No. 3455-20 PAGE 11 <br />PROPOSED IMPROVEMENTS <br />The City of Arden Hills’ existing water system will require improvements to satisfy future <br />development and demand, particularly related to the TCAAP development in the north part of <br />the City. Table 4 lists the improvements proposed, along with their estimated timing and costs. <br />The proposed system is shown in Figure 2. In addition, a copy of the City’s Capital <br />Improvement Plan for 2017-2021 is included in Appendix 4. <br />Table 4 – Proposed Capital Improvements <br />Year(s) Improvement Estimated Cost* <br />Annual Valve Replacement $35,000 <br />Biennial Hydrant Replacement $40,000 <br />2018 Water Tower Repair and Repainting $900,000 <br />County Road E2/Old Hwy 10 Water Loop $855,000 <br />2019 <br />TCAAP Booster Station $1,000,000 <br />TCAAP Trunk Improvements $1,000,000 <br />TCAAP Water Tower $3,400,000 <br />*Values listed include both direct and indirect costs. <br />Proposed Sources and Treatment <br />There are no improvements planned for the City’s three existing service connections to the City <br />of Roseville, which in turn receives its water supply from SPRWS. <br />Proposed Storage <br />As a result of water system modeling with WaterCAD by WSB & Associates, Inc. using the <br />projected water demands with the TCAAP development, it was determined that the system will <br />require an additional one million gallons of storage capacity in the north pressure zone. It is <br />recommended that the City begin the planning process for this 1 MG water tower as soon as <br />possible. Modeling also indicated that the existing North Tower will require the installation of an <br />altitude valve concurrent with the construction of the TCAAP Tower. <br />Proposed Booster Station <br />The north pressure zone is currently maintained by the east side booster station. The projected <br />water demand with the TCAAP development will require an additional west side booster station <br />along Snelling Ave N / Old Hwy 10, with a firm capacity of 1,500 gpm. <br />Proposed Distribution <br />In order to satisfy projected water demands and fire flows for the TCAAP development, <br />modeling indicates that two 12-inch trunk watermains will be required. The approximate routing <br />of the proposed watermain is shown in Figure 2. <br /> <br />Dr <br />a <br />f <br />t <br /> <br />11 <br />/ <br />2 <br />0 <br />/ <br />2 <br />0 <br />1 <br />7