(U.S. Army Engineer District, Galveston 1977). The basin is roughly square 

 (about 250 m on a side), and has a depth of 9 m with side slopes of 1:5. 



Since initial construction, the impoundment basin has filled substantially 

 more rapidly than expected, and, on occasion, the entrance channel has shoaled 

 badly. This has led to SWG having to dredge more frequently and in greater 

 volimies than expected. The post-completion dredging history is discussed in 

 greater detail in Chapter 3 . 



Chapter 2 History 



