- 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

Beach Nourishment
i.
Beach nourishment shall be conducted such that:

a) The beach is not widened beyond its historical profile. The historical profile shall be defined as the widest beach profile that existed prior to June 1986.
b) The material placed on the beach consists of sand of equal or greater grain size than the sand existing on the beach.
c) Placement and subsequent erosion of the materials does not adversely impact tidal marshes or productive intertidal and shallow subtidal areas.
d) Efforts shall be made to maintain a stable beach profile.
e) Dredged material shall be graded at a uniform slope and contoured to reduce cove and peninsula formation, to minimize juvenile fish stranding and hazards to beach users.
f) Erosion or deposition downstream from the disposal site is minimized. Particular care must be taken that erosion of the dredged material does not smother marsh or other shallow productive areas.
g) The volume and frequency of dredged material disposal is such as to maintain a stable beach profile, as nearly as possible.