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Additionally, staff has provided the overall City water consumption since 2003 in Attachment B. <br />This data shows the water the City gets directly from St Paul Regional Water System (SPRWS). <br />Approximately 20% of this water is passed through to Arden Hills. This data shows that the ten- <br />year trend is a 1.5% annual reduction in overall water use for Roseville and Arden Hills. <br />The Commission requested additional information on the water infrastructure. The City's water <br />distribution system consists of the following: <br />• One elevated storage tank <br />o Recently rehabbed in 2014. <br />• One booster station <br />o Currently undergoing major upgrades and will have additional upgrades in the next <br />three to five years. <br />• 162.6 miles of watermain <br />o Average age 45.4 years old <br />o Approximately 72% of the water distribution system was installed between 1959 and <br />1967. <br />o Average watermain rating of 3.1 (1-5 with 5 being best.) <br />0 10 -year average of watermain breaks is 33 per year. Trend is flat. <br />• 1608 valves <br />• 1743 hydrants <br />• 10,400 water meters <br />o Majority have been replaced in the last 5 years. <br />Current Capital Improvement Plan investments of $500,000 annually for watermain replacement <br />for the next 4 years increasing to $1,000,000 in 2023. Increase will allow approximately 2 miles <br />of watermain to be replaced annually. The replacement of watermain through conventional <br />excavation needs to be balanced with street improvements as more watermain is replaced, the <br />higher the cost of street replacement costs. Additional CIP funds are being spent to upgrade the <br />water booster station. <br />Over the last 5 years, staff has replaced on average of 1.27 miles of watermain per year. This <br />year staff will be replacing 1 mile of watermain at a cost of $550,000. <br />Proposed Options <br />Option One —Leave tiers the same. <br />If the commission feels there is no need to make any changes, this option would leave the rate <br />structure as it is today. <br />Option Two —Add 3`a Summer Tier Rate <br />Based on input staff has received at previous meetings there is some interest to set a rate <br />structure that focuses on the highest water users in the summer. The 50,000 gallons per quarter is <br />a possible break point in which to create another summer tier. If a 3`d summer only tier rate was <br />set at this threshold, approximately four (4) percent of residential users would be affected. This <br />4% of users uses 17% of all water in the summer. To make the rate increase significant, staff <br />would propose setting the rate at twice the Tier 1 rate or at $4.50/1,000 gallons. <br />