PREFACE 



The investigations summarized in this report were authorized by the 

 Office, Chief of Engineers (OCE), US Army Corps of Engineers, and performed as 

 a part of Civil Works Research Work Unit 31234, "Developing Functional and 

 Structural Design Criteria." Funds were provided through the Coastal Struc- 

 tures Evaluation and Design Research and Development Program administered by 

 the Coastal Design Branch of the Coastal Engineering Research Center (CERC) at 

 the US Army Engineer Waterways Experiment Station (WES). 



The author gratefully acknowledges the assistance of the following indi- 

 viduals: Messrs. Robert B. Lund and Perry Holman and Ms. Debra L. Rouse, 

 co-op students in the Coastal Design Branch, for their help in software 

 development; Dr. Michael E. Andrew, of the Prototype Measurement and Analysis 

 Branch, for his assistance in the probability and statistics considerations; 

 the staff of the Wave Research Branch, under the direction of Mr. D. D. 

 Davidson, for their suggestions and review comments; and Ms. Shirley A. J. 

 Hanshaw, of the Publications and Graphic Arts Division, WES, for her editing. 



The work was conducted under general direction of Dr. Frederick E. 

 Camfield, Chief, Coastal Design Branch; Mr. C. E. Chatham, Jr., Chief, 

 Wave Dynamics Division; Mr. Charles C. Calhoun, Jr., Assistant Chief, CERC; 

 and Dr. James R. Houston, Chief, CERC. 



COL Allen F. Grum, USA, was Director of WES during the preparation and 

 publication of this report, and Dr. Robert W. Whalin was Technical Director. 



