Agenda - Council Work Session - 09/13/2022

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13 division are included in Appendix J. Tables 17 and 18 present the capital costs for the gravity and pressure filter treatment plants. Table 17 — Capital Cost Opinion Summary Gravity Filter Water Treatment Plant Item Water Treatment Plant: $26,060,000 Construction Contingency (10%): $2,606,000 Preliminary Construction Cost: $28,670,000 Engineering/Construction Admin (12%) $3,440,000 Legal/Admin (1%) $287,000 Total Estimated Project Cost: $32,400,000 Table 18 — Capital Cost Opinion Summary Pressure Filter Water Treatment Plant Item Cost Water Treatment Plant: $24,766,000 Construction Contingency (10%): $2,477,000 Preliminary Construction Cost: $27,240,000 Engineering/Construction Admin (12%) $3,268,800 Legal/Admin (1%) $272,000 Total Estimated Project Cost: $30,780,000 An optional 8,000 square foot garage could be added to either water treatment plant alternative for a project cost of approximately $1.64 million. Life Cycle Cost Opinions Life cycle costs represent the total cost of owning the treatment plants for 50 years and include capital cost, equipment replacement, labor, gas, chemicals, insurance, electricity, and annual equipment repair. Detailed life cycle cost tables are included in Appendix K. The life cycle costs presented in Table 19 and Table 20 assume a 20-year financing period on the capital costs with 2% interest rates and 2.75% inflation. Operating the water treatment plant is not anticipated to require additional Staff. While Staff will need to visit the plant on a daily basis to operate and maintain it, this time will generally be offset by the time Staff currently spends operating and maintaining the six municipal wells and three pump houses within The COR. FEASIBILITY STUDY RAMSY 154354 Page 40