IV-437 

 Land Fills 



The operations of dredging and filling associated with the creation 

 of dry land from marshes and estuarine shallows may have severe 

 prohibitive impact on other estuarine activies. The massive areas 

 filled for large residential and industrial developments destroy 

 much of the environment directly; and, in many cases, the areas 

 involved are large enough to make a significant impact on water 

 circulation and even on the total volume of water in an estuarine 

 system. 



Large fills, such as those made for airports, also limit access 

 to estuarine waters, thereby permanently limiting the recreational 

 potential of such areas. 



Solid Waste Disposal 



The use of undeveloped estuarine shoreline areas for final disposal 

 of garbage and other solid waste materials is not only prohibitive 

 in the same sense as other filling operations, but also the drainage 

 and runoff from such sites can have a severe and continuing impact on 

 water quality. 



Although reliable figures showing the impact of solid wastes on the 

 estuarine environment are lacking, a situation from the San Francisco 

 Bay Area is instructive: "In some instances, Bay water has leaked into 

 old aumpsites; when the tide goes out, black sludge is carried into 



