71 



Lane 20 



'miwm^m^-^ 



W^B^'^ 



' ^S^Mr/^^0f .I-^^i-^.- #i^|^*^^^'^_^J 



Lane 24 



Figure 4-11. Side-scan sonar data from February 1996 siirvey lanes 20 and 24 overlaid with 

 bathymetry showing rapid changes in depth due to bedrock outcrops 



The Portland Disposal Site Capping Demonstration Project, 1995-1997 



