Inspections and assessments of the coastal structures at the various 

 sites did not include the use of instrumentation. Rather, walking inspec- 

 tions and/or boat surveys were conducted, and armor unit positions during 

 the inspections versus their positions in previous aerial photography gener- 

 ally were compared. Settlement of portions of the structures as well as 

 voids in their armor also were noted, and photographs of the structures 

 were obtained. In some instances, District personnel accompanied CHL 

 personnel during the assessments. These procedures were considered ade- 

 quate to obtain expedient, low-cost information required about the per- 

 formance of the structures. 



Chapter 1 Introduction 



