Slurry Gate Valve 



Replace slurry gate valve every 6 years at a cost of $1.2 K per action (as per Indian River 

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



Action 1--P = 



$1.2K(P/F,7%,6) 







$1.2K(0.6528) 



$783.36 



Action 2--P 



$1.2 K(P/F,7%,12) 







$1.2 K(0.4264) 



$511.68 



Action 3— P = 



$1.2K(P/F,7%,18) 







$1.2K(0.2788) 



$334.56 



Action 4--P = 



$1.2 K(P/F,7%,24) 







$1.2 K(0. 1824) 



$218.88 





Present Value = 



$1,848.48 





Annual Value = 



$1,848.48(A/P,7%,30) 





= 



$1,848.48(0.0837) 





= 



$154.72 



All other gate valves 



Replace all other gate valves every 10 years at a cost of $3.6 K per action (as per Indian River 

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



Action 1--P 



= 



$3.6K(P/F,7%,10) 











$3.6K(0.4915) 



= 



$1,769.40 



Action 2--P 



= 



$3.6K(P/F,7%,20) 











$3.6K(0.2420) 



= 



$871.20 







Present Value 



= 



$2,640.60 







Annual Value 



= 



$2,640.60(A/P,7%,30) 



$2,640.60(0.0837) 



$221.02 



Jet pump 











a. Replace mixing 



chamber on the jet pump every 2 



years at a cost of $2.9 K per action (as 



per Indian River Inlet). 



For Shinnecock, 14 actions will be required in the 30-year 



project life: 











Action 1— P 



= 



$2.9 K(P/F,7%,2) 











$2.9 K(0.8674) 



= 



$2,515.46 



Action 2--P 



= 



$2.9 K(P/F,7%,4) 











$2.9 K(0.7487) 



= 



$2,171.23 



Action 3--P 



= 



$2.9 K(P/F,7%,6) 











$2.9 K(0.6528) 



= 



$1,893.12 



Action 4--P 



= 



$2.9 K(P/F,7%,8) 











$2.9 K(0.5664) 



= 



$1,642.56 



Appendix I Capital Replacement Costs, Alternative 2 



19 



