Table 23 



Alternative Selection Decision Matrix 



Alternative 



Final Rating 



Unit Cost (Annual Cost/100,000 m 3 ) 





Sum 





Owner/Operator (Rent/lease=1 ; purchase/own=5) 





Mechanical Reliability 





Continuous=1 ; Periodic=5 





Placement/Discharge Flexibility 





Sand Source Flexibility 





Aesthetics 





Environmental Impact 





Navigation Impact 





Alternative Experie 



nee 





1 s1 Cost 

 ($1997) 



Annual 

 Cost 



($1997) 





1 -Floating Plant 



Nearshore (1 year) 

 Onshore (1 year) 

 Nearshore (2 year) 

 Onshore (2 year) 

 Nearshore (3 year) 

 Onshore (3year) 



1 .039M 

 1.354M 

 1.828M 

 2.458M 

 2.367M 

 3.312M 



1.039M 

 1.354M 

 866K 

 1.165M 

 71 2K 

 996K 



2 

 1 

 2 

 1 

 2 

 1 



2 

 2 

 2 

 2 

 2 

 2 



2 

 2 

 2 

 2 

 2 

 2 



2 

 2 

 2 

 2 

 2 

 2 



2 

 2 

 2 

 2 

 2 

 2 



2 

 2 

 2 

 2 

 2 

 2 



5 

 5 

 5 

 5 

 5 

 5 







19 

 18 

 19 

 18 

 19 

 18 



10.39 

 13.54 

 8.66 

 11.65 

 7.12 

 9.96 



197 

 244 

 164 

 210 

 135 

 179 



2-Semifixed 



3.765M 



764K 



3 



1 



3 



3 



4 



4 



1 



2 



5 



26 



7.64 



199 



3-Crawldog 



6.361 M 



1.328M 



5 



1 



3 



4 



4 



4 



1 



4 



5 



31 



13.28 



412 



4-Punaise 



Fillet 

 Downdrift 



250K 

 250K 



1.310M 

 1.310M 



4 

 4 



2 

 2 



3 

 3 



2 

 2 



3 

 3 



4 

 4 



3 

 3 



3 

 3 



1 



1 



25 

 25 



13.10 

 13.10 



328 

 328 



5-Mechanical Fillet 

 Mining 



3.765M 



764K 



5 



1 



3 



5 



4 



4 



1 



4 



5 



32 



7.64 



244 



1 Unit cost for Alternative #1 are from Table 14. 



Note: Grades range from 1 (most desirable) to 5 (least desirable). 



Chapter 7 Conclusions 



83 



