A letter and photographic review of erosion at North Point, 

 Florida shows marked recession o£ the coastline that has accelerated 

 since 1935. Four cabbage palmetto (timber) groins were constructed 

 in July 1938. Subsequent investigations showed that the groins had 

 no effect in preventing or retarding shore erosion. 



Key Words - S. Atlantic/Field/Timber/Erosion/Misc-plan/Concrete/ 

 Accretion/ Impermeable/ 1900 -1949/Photographic/Pi ling/ 

 High/ 



"Effectiveness of Groins at Rockaway Beach, 3812GR0001 



Long Island, New York" 



Hyde, J. F. C, Dec, 1938, U. S. Army Corps 



of Engineers, New York District, Unpublished 



Report. (V.F. 3081 12/38) 



This letter to the Beach Erosion Board evaluates the performance 

 and cost of permeable groin extension work on groins at Rockaway Beach, 

 New York. 



Key Words - Maintenance/Economics/1900-1949/N. Atlantic/ Impermeable/ 



Piling/Permeable/Timber/S. M. Wood/Accretion/Scour/Erosion/ 

 Field/ 



"Beach Erosion Studies" 3901GR0001 



Brown, E. I., Shore and Beach , American 

 Shore and Beach Preservation Assoc, Vol. 7, 

 No. 1, Jan., 1939, pp. 3-23. (TC330 .Am3) 



Design criteria of groins is discussed in detail. The author 

 recommends low, impermeable groins. Examples of systems at Palm Beach 

 and St. Augustine and their effects are given. 



Key Words - Structural-design/Piling/Accretion/Artificial-fill/ 



Impermeable/Low/S. Atlantic/Steel /Timber/Rubble -mound/ 

 Scour/Permeable/System/Terminal/1900-1949/ 



"Shore Protection by Permeable Groins" 3907GR0001 



Boase, A. J. , Shore and Beach , American Shore 

 and Beach Preservation Assoc, Vol. 7, No. 3, 

 July, 1939, pp. 105-108. 



Permeable S. M. Wood and Concrete pile groins are described with 

 examples given from the Great Lakes. Groin construction and manufacture 

 of concrete blocks are presented in detail along with a section on 



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