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have only recently subsided. Due to the small tidal prism of Freeport 

 Harbor entrance, frequent dredging is required, with shoaling rates up to 

 1,450,000 cubic yards per year. 



San Luis Pass is stable geographically, although it has been increasing 

 slowly in size over the past hundred years. The volume of the ebb and flood 

 tidal deltas has remained almost constant in recent years, and parts of 

 these deltas would be good sources for beach-fill material. Such sources 

 are also found at Galveston Bay entrance, where jetty construction produced 

 extensive areas of accretion on the adjacent beaches. Historically, 

 increasing cross-sectional area at Galveston resulted in corresponding 

 increases in Galveston Bay tidal range, and ebb discharges during "northers" 

 contributed significantly to natural scouring of the channel. 



Although small, Rollover Pass affected adjacent bay and beach 

 characteristics in a pattern similar to that found at large inlets with 

 manmade improvements. Complex patterns of flow occur within the Sabine Pass 

 Inlet-bay system, but strong ebb discharges during winter northers 

 undoubtedly enhance channel maintenance. Although bottom sediments at the 

 pass are much finer than at other Texas inlets, changes in response to jetty 

 construction closely parallel those at Galveston Bay entrance. 



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