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Potential Next Steps Study Examples <br /> NW Metro Regional Water Supply System Study <br /> September 17, 2020 <br /> Page 2 <br /> A risk of this scenario is that there is only one river crossing, however, Rogers has 7 wells and Dayton will have 4 <br /> wells soon which could be used in the event of an emergency. For comparison purposes, Approach 1 in the Draft <br /> NW Metro report which was a 25 MGD surface WTP connecting the four Cities was$224 million. <br /> Option 2—Connect Dayton and Rogers— Phase 1 <br /> Option 2 assumes that a surface water treatment plant is constructed in Dayton and serves the Cities of Dayton <br /> and Rogers. The 2040 maximum day demands for the two cities is estimated to be 8 MGD. <br /> Phase 1 of Option 2 would include a 10 MGD surface WTP in Dayton and approximately 2.7 miles of 24"trunk <br /> watermain. This scenario is depicted on Figure 2 (attached). The concept level costs for Option 1 are included <br /> on the following table. <br /> Item Quantity Units Unit Cost Total Cost <br /> 10 MGD Surface WTP 1 Lump Sum $421000,000 $42,000,000 <br /> River Intake 1 Lump Sum $2,0001000 $21000,000 <br /> 24" Raw Watermain 14,000 Feet $400 $5,600,000 <br /> Easements/ Land 10 Acres $100 000 $1 000 000 <br /> Acquisitions ' <br /> Environmental 4 Miles $501000 $300,000 <br /> 1 Subtotal $50,900,000 <br /> Contingency (30%) $15,300,000 <br /> Eng/Admin/Legal (20%) $10,200,000 <br /> Total $76,400,000 <br /> Future Phases <br /> The intent with a smaller scale initial NW Metro water supply project is that it could expanded to add additional <br /> communities in the future. Interim watermain connections could also be made prior to making 2040 or ultimate <br /> demand connections. An example of an interim connection would be to connect Corcoran to the Rogers <br /> distribution system as discussed in the draft Northwest Metro Study. <br />