186 



r>i;*int>^iK-ti»ce dredging operations i3 baaed or. siltat ion 

 racGs/aquaUic plant growth. 



Estimated dredging quantities through 2010: 



ConstrucL-or. Dredging: 



14 Million CY. 30-40% potenr.ia'ly contaminated. 



Maintenance Dredging: 



30 Million cy, generally, lecG than lOV potentially 

 contam-.natcd. 



QUESTION: HOW aoes the Navy currently dispose of dredge 

 material, both contaminated and clean? Are enviroiiinental 

 restrictions resulting in disposal problems that Kavy will have 

 to address in the future? 



ANSWER: No::-contaTiinated dredge material is uRf'd apt fill 

 material, or for near -shore or on-shore beach replenishment. 

 Nor.-contaminatd material not 3\ji~.ah'p fnr- b«ach replenishment io 

 disposed of at an off-shore disposal site. 



Contarr.inar.ed material is disposed of in upland disposal sites, 

 capped (above w^^it-pr ot bolowl by claan dredge natcrial or may be 

 chemically treated to remove or arrest tie contaminants in the 

 drftdg«=.r3 m;5rericil . 



nff-chorc disposal eitec ai-c iijw open to all users ctud die 

 primarily controlled by tho Army Corps of Engineers. These sices 

 have United capacity and are subject Lu liicieasing public 

 scrutiny and environmental restrictions. Disposal of 

 c.-jiitc»niinatcd dredge material in upland disposal sites IS 

 extremely expensive. Disposing of conLaiuinated dredge material 

 will continue to be « challenge as env.iromental regulations 

 become more restrictive. 



