Table A-10. Summary of Estimated Yield Costs Associated with Seaside Basin Injection/Recovery Project (1998 dollars) Average Annual Injection Potential *a Average Annual Potential Yield Injection Facilities Cost Estimate *b Cal-Am Distribution System Costs *c Total Capital Costs O&M Costs for Injection and Recovery *d 1,840 af/yr (assumes six new Cal-Am injection wells) 1,700 af/yr $8.1 million $9.0-14.9 million $17.1-23.0 million $433,000 per year 2,620 af/yr (assumes nine new wells, enlarged pipeline, expanded pump station, and Carmel Valley Filter Plant improvements) 2,080 af/yr $15.9 million $13.0-18.7 million $28.9-34.6 million $596,000 per year *a. Injection potential would be greater in a wet year and smaller in a dry year. (See Fugro West 1997.) The number of injection wells was increased based on results of preliminary pilot injection well testing in 1998 (Fugro West 1998). *b. Estimated construction costs were increased by 25% for design, permitting, and construction management and were escalated by 3% to represent 1998 cost levels. Capital cost estimates do not include costs for environmental mitigation. *c. Source: American Water Works Service Company 1997. Estimated construction costs were increased by 45% (20% for contingencies and 25% for design, permitting, and construction management) and escalated by 3% to represent 1998 cost levels. *d. O&M costs for diversion, treatment, and transport of water from Carmel Valley to Seaside Basin and injection and recovery of the water. O&M costs associated with Cal-Am distribution system improvements were not developed.