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TECHNICAL MEMORANDUM (CONTINUED) <br /> Water Supply vs. Demand <br /> 9.0 <br /> L ..d MDD+5% <br /> 7.0 _..y..__,.TM__-_-_w__. _H_________ -_v _ <br /> to <br /> -a <br /> c 5.0 <br /> E f <br /> - t <br /> to 4.0 — _ <br /> o <br /> - <br /> m <br /> 2.0 ------- _.4..46 MG e _ - 5--29 MGa- <br /> 3.46 MG[?from Including TWP_ _ M Including TU <br /> Marysville Segment 3 to 8 Well Supply <br /> 0.0 <br /> 2013 2015 2017 2019 2021 2023 2025 2027 <br /> Year <br /> Figure 2-4. Water Supply vs. Demand <br /> Conclusions: Segments 1 and 2 of the Tulalip Water Pipeline need to be completed to ensure adequate future <br /> water supply. Based on the 7 percent growth projection, the water supply will be at capacity as soon as 2018 <br /> unless the TWP is completed or The Tribes utilizes their existing water wells. If the existing Tribal water wells <br /> are used, this date can be delayed. This scenario would also require extension of the wheeling agreement with the <br /> City of Marysville which expires in 2020. <br /> 2.2 Summary and Recommendations <br /> This section provides a summary of water demand projections and the need for completion of the TWP. The key <br /> points are: <br /> • To ensure adequate water supply beyond year 2018, Segments 1 and 2 of the Tulalip Water pipeline need <br /> to be completed. This deadline can be delayed if the Tribal water wells are used. <br /> • For short-term water system planning, 5 percent or 7 percent annual growth in water demand is expected. <br /> • Once Segments 1 and 2 of the TWP are completed,the City of Everett can provide up to 36 mgd through <br /> the Tulalip Water Pipeline. This would supply adequate Tribal water beyond the year 2028. <br /> The long-term viability of the Tulalip water system is dependent on the completion of all 8 segments of the <br /> Tulalip water pipeline. It is recommended that The Tribes and City begin work on completing Segments 1 and 2 <br /> prior to 2018. It is also recommended that the wheeling agreement with the City of Marysville be extended to <br /> provide an emergency backup water supply,in the event there were problems with the Tulalip pipeline. <br /> The Tulalip Tribes 216-1598-057(01) <br /> Tulalip Water Demand Projections Compared to Water Supply 7 August 14,2013 <br /> Options <br />