- Table of Contents   Columbia River Estuary Dredged Material Management Plan

List of Tables

List of Figures

Acknowledgments

Introduction
Purpose and Plan Content
Plan Revision Process
Definitions

Guidelines
General Dredging and Disposal
Dredging
Dredged Material Disposal
Site Selection and Site Reservation
Dredging and Dredged Material Disposal Use and Activity

Plan Implementation
Local Jurisdiction Review
Tracking Use of Disposal Sites
Regional Coordination

Site Inventory
Site Inventory
Oregon
Washington
Map

Appendices
Appendix A - Dredging Options
Appendix B - Disposal Options
Appendix C - Beneficial Use Options
Appendix D - Agency Standard Removal/Fill Permit Conditions
Appendix E - Summary of Site Inventory Revisions
Appendix F - Overview of Dredged Material Management Regulations
Appendix G - Summary of Sediment Quality

  

GUIDELINES

Disposal
1. In-water Disposal

c. Estuarine In-Water

i. Estuarine in-water disposal shall be monitored to assure that estuarine sedimentation has no adverse effects on biota, and is consistent with the resource capabilities and purpose of affected natural and conservation zones.
ii. Estuarine in-water disposal shall be in areas identified as low in benthic productivity and use of these sites shall not have adverse hydraulic effects.
iii. Long-term use of an estuarine disposal site may only be allowed if monitoring confirms that the impacts are insignificant. Disposal is contingent upon demonstration that:

a) Adverse effects due to changes in biological and physical estuarine properties will not result;
b) Estuarine disposal sites shall minimize interference with recreational and commercial fishing operations, undesirable hydraulic effects, and any adverse effects on estuarine resources (fish runs, spawning activity, benthic productivity, wildlife habitat, etc.).

iv. Use of the disposal site does not interfere with fishing activities by causing major changes in the circulation patterns or bottom configuration of the disposal site.