Figure 11. Salinity records from the Hopedale section of the 

 Mississippi River in Louisiana showing evidence of salt intrusion 

 after completion of the Mississippi River-Gulf Outlet Canal in 1962 

 (Source: Reference 42). 



Mean 



Variance 



Standard 

 deviotion 



1955 



1960 



1965 



Introduction of agricultural, urban, and industrial pollutants; 

 Segmentation of natural areas, often resulting in drainage and 



development in resulting smaller units; 

 Destruction of unique natural habitats and environments. 



He also mentions the following positive effects: 



Increase in land-water interface; 



Spoil may create new habitats and increase habitat diversity; 



Increased access for sports, recreation, and commercial activities. 



4.2 PIERS - SUBPROJECT 2 



Piers built for mooring marine craft are of concern if they block 

 water circulation, alter or destroy wetlands, or otherwise adversely alter 

 the natural shoreline. Properly located and designed, however, piers 

 should have minimal effects on fish and wildlife resources. 



4.2.1 Summary 



Piers are defined as structures that extend into navigable waters for 

 the mooring of watercraft or other purposes and includes fixed docks, 



95 



