Laserfiche WebLink
Chapter 8 — Approach Comparison <br /> The four approaches are compared through an analysis using 20-year and 60-year planning horizons. <br /> The 2040 Regional System Plan is based on meeting the 2040 demands for Dayton, Ramsey and <br /> Rogers and assumes that the ultimate water trunk main is extended to Corcoran by 2040. For the 60- <br /> year planning period, the system capacity is expanded from 2040 to accommodate the ultimate or <br /> buildout conditions of all four communities. <br /> The concept regional water supply distribution system features are defined in Chapter 3. The treatment <br /> facilities for regional surface water, groundwater, and conjunctive use systems are described in <br /> Chapters 4-6. Chapter 7 defines the future water supply systems for each community assuming <br /> continued reliance on groundwater. Complete regional water systems are formulated for each of the <br /> four approaches for 2040 and Ultimate Plans. <br /> Table 8-1 and Figure 8-1 summarize the lifecycle costs for water system facilities to meet 2040 <br /> demands. The three regional drinking water system approaches and continuing with the `status quo' of <br /> separate community systems are compared. <br /> Table 8-1.Concept Level Capital and O&M Costs for 2040 Demand <br /> Approach 1 Approach Approach 3 Approach 4 <br /> Item Regional Regional Conjunctive Status Quo <br /> Surface Water Groundwater Use Lime <br /> Lime SofteningJ oftening <br /> Capital Costs I <br /> Distribution System <br /> (Watermain/Booster <br /> Stations) <br /> Phase A, Scenario 1 $61,0007000 $61,0005000 <br /> Phase A, Scenario 2 $595300,000 <br /> Phase B $538001000 $51800,000 $518001000 <br /> Phase C $18,600,000 $18,600,000 $18,600,000 <br /> WTP and Wells $1321 000,000 $1761 000,000 $102,000,000 $1975 000,000 <br /> Capital Cost Total' $21750009000 $2%0001000 $187,0001000 $190,000,000 <br /> Annualized Capital $14,6009000 $1755009000 $12,500,000 $121700,000 <br /> Cost(20 year) <br /> O&M Annual Costs <br /> WTP/Well O&M $559007000 $555005000 $552505000 $651005000 <br /> Booster Station O&M $1001000 $100,000 $1001000 <br /> WTP/Well Repair& $25600,000 $3,5005000 $2,000,000 $359005000 <br /> Replacement(2%) <br /> Distribution Repair and $900,000 $8007000 $9001000 <br /> Replacement(1%) <br /> L O&M Cost Total' $9,500,000 $%9001000 $8,2501000 $10,000,000 <br /> r <br /> FTotal Annualized Cost' $24,1009000 $2754009000 $205750,000 $221700,000 <br /> 1 Costs based on 2020 dollars; no escalation to date of construction. <br /> Page—34 1 METROPOLITAN COUNCIL <br />