Replace motor every 15 years at a cost of $0.9 K per action (as per Indian River Inlet). 



For Shinnecock, one action will be required in the 30-year project life: 



Action 1-P = $0.9K(P/F,7%,15) 



$0.9 K(0.3448) = $310.32 



Present Value = $310.32 



Annual Value 



$310.32(A/P,7%,30) 



$310.32(0.0837) 



$25.97 



Gauges 



Replace manual gauges every 5 years at a cost of $ 1 K per action (as per Indian River 

 Inlet). For Shinnecock, five actions will be required in the 30-year project life: 

 Action 1--P = 



Action 2-P 



Action 3--P 



Action 4-P 



Action 5--P 



$1 K(P/F,7%,5) 





$1 K(0.7009) 



$700.90 



$1 K(P/F,7%,10) 





$1 K(0.4915) 



$491.50 



$1 K(P/F,7%,15) 





$1 K(0.3448) 



$344.80 



$1 K(P/F,7%,20) 





$1 K(0.2420) 



$242.00 



$1 K(P/F,7%,25) 





$1 KC0.1699) 



$169.90 



Present Value 



$1,949.10 



Annual Value 



$1,949.10(A/P,7%,30) 





$1,949.10(0.0837) 





$163.14 



b. Replace remote gauges every 10 years at a cost of $4 K per action (as per Indian River 

 Inlet). For Shinnecock, two actions will be required in the 30-year project life: 



Action 1— P = 



$4K(P/F,7%,10) 









$4K(0.4915) 



= 



$1,966.00 



Action 2-P = 



$4 K(P/F,7%,20) 









$4 K(0.2420) 



= 



$968.00 





Present Value 



= 



$2,934.00 





Annual Value 



= 



$2,934.00(A/P,7%,30) 







= 



$2,934.00(0.0837) 







= 



$245.58 



Appendix I Capital Replacement Costs, Alternative 2 



17 



