Legal : Any legal aspects concerning the construction of groins. 



Long: A groin whose length extends beyond the breaker zone. 



Low: Groins which do not exceed high tide level, and which allow 

 passage of appreciable quantities of littoral drift by 

 overtopping waves. 



L- groins : Groins built in the shape of an "L". 



Maintenance : Repair or additional construction of groins. 



Mil liken : Groin of Milliken design. 



Misc-materials : Materials that groins may be constructed of other 

 than the materials listed in the Key Word List. 



Misc-plan : A plan view or description of the plan view of the 



alignment of a single groin or of a groin system with 

 the beach, and the spacing of groins in a system. 



Mobbs : Groin of Mobbs design. 



Model : Pertains to laboratory investigations of groins by model 

 studies . 



Not Annotated: Articles which have not been annotated. 



Notched : Groin with the entire length notched at the top providing 

 increased permeability. 



N. Atlantic : Refers to the shoreline of the United States from 

 Maine to the Virginia-North Carolina state line. 



N. Pacific: The shoreline of northwestern North America from Alaska 

 south to the Oregon-California state line. 



Patent: Articles which present groin patents. 



Permeable : Groins which (have openings through the structure of 



sufficient size to) permit passage of appreciable quan- 

 tities of littoral drift. 



Photographic : Articles which present extensive photographic coverage 

 of groins. 



Piling: Denotes that the groin is built in part by piles. 



Rubble -mound: Groins constructed in part or wholly of stone. 



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