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Happy Valley Water & Sewer Study Technical Memorandum Cost Estimate Cost of the improvements are summarized in Table 6 and a more detailed breakdown is included in Appendix E. Note that Project 3 is required only to serve parcels that are not currently developed and would therefore only be required for Scenario 2. These pipelines are indicated in Figure 6. Table 6: Sewer Improvements Cost Estimate Summary Item 8" Gravity Sewer Estimated Quantity c ost 7,400 $1,820,000 Quantity Cost 7,895 $1,930,000 6" Force Main 2,200 $350,000 2,200 $350,000 Raw Construction Subtotal' $2,170,000 $2,280,000 Implementation Costs 25 %' $540,000 $570,000 Capital Cost Subtotal $2,710,000 $2,850,000 Project Contingency 20 %' $540,000 $570,000 Capital Cost Total $3.25 million $3.42 million # Units 92 125 Capital Cost Per Parcel $35,000 $27,000 Rounded to the uamst $10,000 5 Summary Total estimated costs for water distribution and wastewater collection system improvements under Scenario 1 and Scenario 2 are summarized in Table 7. Table 7: Total Estimated Capital Costs Water System Facilities $1.40 $1.52 Sewer System Facilities $2.17 $2.28 Raw Construction Subtotal' $3.57 $3.80 Implementation Costs 25 %' $0.89 $0.95 Capital Cost Subtotal $4.46 $4.75 Project Contingency 20 %' $0.89 $0.95 Ca ital Cost Total $5.35 million $5.7 million # Units 92 125 Capital Cost Per Unit $58,000 $46,000 November 2016 16