Annual operating costs at Shinnecock Inlet are based on actual annual costs at Indian River 

 Inlet from 1990 through 1995, which are detailed in Appendix G. The Indian River Inlet plant 

 requires a three-person staff, but due to the added booster pump required at Shinnecock, a five- 

 person crew is assumed. This crew size could be reduced by automating operation. The 

 rationale and assumptions detailed in Appendix H are summarized in Table 16. 



Table 16 



Annual Operating Costs for Alternative 2: Semifixed Plant 



Item 



Shinnecock Inlet Costs (1997 $) 



Operating crew 



350.0K 



Utilities 



1.0K 



Plant fuel 



12.0K 



Vehicles (incl fuel) 



1.2K 



Maintenance 



54.0K 



Total annual cost 



418.2K 



Finally, capital replacement and overhaul of various components of the bypass system must 

 be factored into the costs. The Indian River Inlet replacement and overhaul costs and Shinnecock 

 details are provided in Appendix I and summarized in Table 17. 1 



The overall annual cost of the bypass plant (including first cost, annual operating cost, and 

 capital replacement cost) is calculated as: 



First Cost + Operating Cost + Capital Replacement Cost = Total Annual Cost 



$3,765,000(0.0837)^^0 + $418,200 + $30,400 = $763,731 -$764,000 (8) 



It should be noted that Indian River Inlet costs of $1,462 M in 1989, when converted to 1997 

 dollars (HQUSACE 1996) (21.2 percent increase), become $1.77 M. Discounting approximately 

 $1.2 M in contingencies, engineering and design, and supervision and administration (which are 

 not included in the Indian River Inlet figure) leaves approximately $2.6 M for initial construction 

 of the Shinnecock semifixed alternative. The remaining difference of $830 K between the two 

 sites can be largely attributed to a longer pumping distance (more pipe, two booster pumps, and 

 increased labor). 



Personal communication, Mr. Robert Henry, Delaware Department of Natural Resources and Environmental Control, Dover, 

 DE, 1996. 



Chapter 5 Bypassing Alternatives 



61 



