TABLE OF CONTENTS 



Page 



LIST OF TABLES v 



LIST OF FIGURES vi 



ACKNOWLEDGMENT xii 



EXECUTIVE SUMMARY xiii 



LO BACKGROUND 1 



1 . 1 The New England Shipping Industry 1 



L2 The DAMOS Program 1 



L3 Subaqueous Capping 2 



1 .4 Deep-Water Capping at the Portland Disposal Site 5 



2.0 THE CAPPING DEMONSTRATION PROJECT 11 



2. 1 Dredging of the Royal River 11 



2.2 Capping Demonstration Project Time Line 16 



2.2.1 Baseline Surveys at the Royal River and Royal River Project Area . 16 



2.2.2 Dredging Operations, Fall-Winter 1995-96 19 



2.2.3 Expanded Royal River Project Area Baseline Survey 23 



2.2.4 Pseudo-UDM Dredging Operations, Fall 1996 23 



2.2.5 Royal River Project Area Precap (Pseudo-UDM) Survey 23 



2.2.6 Capping Dredging Operations , Fall-Winter 1 996-97 24 



2.2.7 Royal River Project Area Postcap (CDM) Survey 24 



2.2.8 Additional Analysis of Royal River Sediment Cores 24 



2.3 Capping Model Predictions 24 



3.0 METHODS 29 



3 . 1 Navigation 29 



3.2 Survey Areas 29 



3.3 Bathymetry 30 



3.3.1 Bathymetric Data Collection 30 



3.3.2 Bathymetric Data Processing 32 



3.4 Side-Scan Sonar 34 



3 . 5 Photography 34 



3.5.1 REMOTS® Sediment-Profile Photography 34 



3.5.2 Planview Photography 35 



3.6 Sediment Grab Sample Collection 40 



3.7 Sediment Coring Collection 42 



3.7.1 Royal River Survey 42 



3.7.2 Postcap Survey 42 



3.8 Additional Royal River Cores 44 



