Replace pump shell every 4 years at a cost of $5.5 K per action (as per Indian River Inlet). 

 For Shinnecock, seven 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 



Action 6--P 



Action 7--P 



$5.5 K(P/F,7%,4) 

 $5.5 K(0.7487) 

 $5.5 K(P/F,7%,8) 

 $5.5 K(0.5664) 

 $5.5K(P/F,7%,12) 

 $5.5 K(0.4264) 

 $5.5K(P/F,7%,16) 

 $5.5 K(0.3212) 

 $5.5 K(P/F,7%,20) 

 $5.5 K(0.2420) 

 $5.5 K(P/F,7%,24) 

 $5.5 K(0.1824) 

 $5.5 K(P/F,7%,28) 

 $5.5 K(0. 1375) 

 Present Value 



$4,117.85 



$3,115.20 



$2,345.20 



$1,766.60 



$1,331.00 



$1,003.20 



$756.25 

 $14,435.30 



Annual Value 



$14,435.30(A/P,7%,30) 



$14,435.30(0.0837) 



$1,208.23 



Because two booster pumps will be needed, Annual Value = $2,416.46 



Caterpillar Diesel Engine (motive water supply pump) 



Overhaul pump engine every 16 years at a cost of $15.7 K per action (as per Indian River 

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

 Action 1-P = $15.7 K(P/F,7%,16) 



$15.7K(0.3212) = $5.042.84 



Present Value = $5,042.84 



Annual Value 



$5,042.84(A/P,7%,30) 



$5,042.84(0.0837) 



$422.09 



Motive Water Supply Pump 



a. Replace impeller every 10 years at a cost of $4.7 K per action (as per Indian River Inlet). 

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



Action 1— P 



Action 2--P 



$4.7K(P/F,7%,10) 

 $4.7K(0.4915) 

 $4.7K(P/F,7%,20) 

 $4.7K(0.2420) 

 Present Value 



$2,310.05 



$1,137.40 



$3,447.45 



Appendix I Capital Replacement Costs, Alternative 2 



15 



