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4. Shsllfish -
Studia• have ehovn that a pfl ls~s than 7.5 may be deLrimen-
tal to shellfiah growth. Dredgiu~ conceiYabl~_could.affact
a lo~ring of pH as a rasult of disturbance. of - uidic de-
po~it~. Dredging cau al~o a~cpos~ a grsater amoe~aL of ds-
letetious material to tha "~training" action of.ahellfiah
ingution. Large amounte of ~u~peaded. matarial. not. nasd-
ad a• food bq ahellfish can compatitively eliminate-food
mate.zial. thus atarving the shellfish. The_free-awimmiag.
larvae •tage can be caused to sattle prematurely in the
presence of large concentrations of auepended solide:
There is also a great hazasd in burying.the_-~edeniar~.
adult ahellfish form ae a reoult of settling of dredged
matarial.
S. Agricultural Nater Sup~ly _
' The resuspending of colloidal and other mat~zial.in.i=ri- :
f gation watere could detrimentally affect.soil infiltraiion
i rates aad damage irrigation equipment through abrasive .
f action. There ia also a problam of maiatenaace in canals ~
~ related to the depositioa of dredged material, ;
6. Ganeral Constructioa ia~c~ladiag Pi~xs, Bulkhaada, ~arves, .
Submarine Pipelines, Cables, etc. .
In ~~neral the same conditiona attributed to dredging
applq to the construction of theee facilities ti.
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