T.M. No. 10 - 194-8 



Experimental Steel Sheet Pile Groins, Palm Beach, Florida 

 by C. W. Ross ~~~ 



Five experimental steel sheet pile groins were constructed on the 

 Atlantic Coast at Palm Beach, Florida. Steel was donated by 5 steel 

 companies, designs made by the Beach Erosion Board, and construction 

 by the City of Palm Beach. Observations regarding deterioration of 

 steel and protective coatings over a period of 10 years are reported 

 and conclusions drawn regarding the manner of deterioration. 



T.M. No. I I - November 1949 



Reflection of Solitary Waves by Joseph M. Caldwel I 



A laboratory study to determine and evaluate the effect of the 

 several variables controlling the amount of wave energy reflected by 

 representative beach or shoreline structures. Solitary waves were 

 run: against four simulated conditions for shore structures, and 

 incident and reflected wave heights measured. Empirical relations 

 are determined between the amount of energy absorbed for permeable 

 and impermeable faces and such variables as thickness of structure, 

 rocl< diameter, void percentage, and slope of seaward face. 



T.M. No. 12 - February 1952 



Durability of Steel Sheet Piling in Shore Structures 

 by A. C. Rayner and C. W. Ross 



Along the Atlantic Coast of the United States and the Gulf coast 

 of Florida, 153 groups of steel sheet piling structures were studied 

 and classified. Structures were selected for various conditions of 

 exposure, treatment, and types. Measurements and observations were 

 made over a 10-year period and general conclusions presented re- 

 garding useful life of steel sheet piling. Measured and observed 

 data are tabulated. 



T.M. No. 15 -January 1950 



Longshore Current Observations in Southern California 

 by F. P. Shepard 



Currents were measured in the surf zone at frequent intervals 

 for a year along the Southern California coast. Study shows the 

 dominant currents in the area from Newport Beach to the Mexican 

 Border to be to the south. North currents prevail during a large 

 part of the summer and fall. Strong alongshore currents exist even 

 during times when large waves approach from directions essentially 

 normal to the beaches. Currents moving along the shore away from 

 points of wave convergence are shown to be important. 



