Preface 



The study reported herein was conducted as part of the Monitoring Completed 

 Navigation Projects (MCNP) Program, formerly Monitoring Completed Coastal 

 Projects Program. Work was carried out under Work Unit 1 1M-7, "Periodic 

 Inspections." Overall program management for MCNP is accomplished by the 

 Hydraulic Design Section of Headquarters, U.S. Army Corps of Engineers 

 (HQUSACE). The Coastal and Hydraulics Laboratory (CHL), U.S. Army Engineer 

 Waterways Experiment Station (WES), is responsible for technical and data man- 

 agement and support for HQUSACE review and technology transfer. Program 

 Monitors for the MCNP program are Messrs. John H. Lockhart, Jr., Barry W. 

 Holliday, and Charles B. Chesnutt (HQUSACE). The Program Manager is 

 Ms. Carolyn M. Holmes (CHL). 



This report is the first in a series that will track the long-term structural response 

 of the Humboldt Bay Jetties, California, to their environment. The information con- 

 tained in this report was gathered as a result of land and aerial survey work con- 

 ducted by Richard B. Davis, Inc., under contract to the Corps of Engineers, and 

 broken armor unit surveys conducted by Messrs. Robert R. Bottin, Jr., Larry R. Tol- 

 liver, and Brian Marble (CHL), and Mr. William S. Appleton, U.S. Army Engineer 

 District, San Francisco (CESPN). 



The work was conducted during the period September through December 1996 

 under the general supervision of Dr. James R Houston and Mr. Charles C. Cal- 

 houn, Jr., Director and Assistant Director, CHL, and under the direct supervision of 

 Messrs. C. E. Chatham, Jr., Chief, Wave Dynamics Division, and Dennis G. Mar- 

 kle, Chief, Wave Processes Branch. This report was prepared by Messrs. Bottin, 

 CHL, and Appleton, CESPN. 



Director of WES during the investigation and publication of this report was 

 Dr. Robert W. Whalin. Commander and Deputy Director was COL Bruce K. 

 Howard, EN. 



The contents of this report are not to be used for advertising, publication, 

 or promotional purposes. Citation of trade names does not constitute an 

 official endorsement or approval of the use of such commercial products. 



