derived (summarized in a report by Reid published as Technical Memorandum 

 No. 83 of the Board) and elevations were predicted for various points 

 in Narragansett Bay for several hypothetical hurricane s, mainly a transposed 

 Hatteras 1944 hurricane. The method has been calibrated with observations 

 of the 1938 hurricane and with the Narragansett Bay model at the 

 (Vicksburg, Mississippi) Waterways Experiment Station. 



XI. Dr. W. C. Krurabein (Consultant) 



Statistical study is being made to determine the best sampling pro- 

 cedure to use in determining the characteristics of the littoral material. 



Statistical study is also being made to determine methods of 

 establishing the design size characteristics of fill material for 

 artificial fill projects. 



XII. Waterways Experiment Station, Vicksburg, Mississippi 



(a) Wave Run-up and Overtopping. Principal investigator, R. Y. 

 Hudson. 



Testing was completed in the riprap-faced seawall with a seaside 

 slope of 1 on lj. A report by Saville summarizing the data taken over the 

 past three years was issued as Technical Memorandum No. 64 of the Board. 



(b) Study of Effect of Inlets on Adjacent Beaches. Principal 

 investigator, H. B. Simmons 



The inlet condition resulting from 300 tidal cycles with the 

 shallow lagoon was tested with a storm tide superimposed on the regular 

 tide. Tidal elevations were raised gradually over seven tidal cycles to 

 a maximum and then reduced to normal over the succeeding three tidal 

 cycles. A break-through of the migrating (above water) bar occurred with 

 the storm tide and, once a channel was fairly well defined, it migrated 

 downbeach. 



(c) Study of Durability of Concrete in Shore Structures. Principal 

 investigator, B. Mather and T. B. Kennedy 



A study is being made summarizing the factors affecting the 

 durability of concrete in shore structures, the results of tests and 

 investigations of durability of concrete specimens in coastal exposures, 

 and selected service records of specific prototype concrete structures. 



A report is in preparation. 



XIII. Beach Erosion Board 



The Research program of the Board, of which the above summarized 

 contract work forms a part, is carried on for the most part in the Board* s 



64 



