Dredged Material disposal sites reviewed and designated in this plan are listed in the following inventory. The inventory includes all sites required to accommodate anticipated five-year disposal needs and many sites suitable for meeting longer-term disposal requirements. The sites should be designated in the Local Comprehensive Plan (Oregon) and the Shoreline Master Programs (Washington).

The following inventory includes all types of currently utilized dredged material disposal sites in the estuary area except for flow-lane, ocean and levee top disposal sites. Rather than identifying specific flow-lane sites, a general area suitable for flow-lane disposal was identified. This area encompasses the main Columbia River Navigation Channel plus a 600-foot wide strip along each side of the channel (see attached map). Individual flow-lane disposal sites within this area will be chosen prior to each dredging project based on the policies and standards applicable to flow-lane disposal.

Preference should be given to those disposal sites that provide an opportunity for beneficial use of the dredged material.

The EPA designates Ocean disposal sites. Although they are not described in this plan, use of ocean sites must comply with the plan's policies and standards, in addition to the MPRSA standards and regulations. The currently designated sites can be seen on the overall dredged material disposal site map included with this plan.

Levee top disposal is undertaken primarily for the purpose of maintaining and reinforcing levees. In Oregon, an exception to Statewide Planning Goal 16 identifies levees that can be maintained with dredged material.

The information included in the following inventory consists of a standardized description of each site and site maps. Portions of each description are intended to provide planning information only while other portions are intended to be regulatory. A dredged material disposal proposal must comply with the regulatory portions but need not comply with the informational items. The standardized descriptions explained below indicate which items are informational and which are regulatory.

Most of these sites are also identified in the Corps of Engineers 1998 Dredged Material Management Plan. These sites have been determined necessary for maintenance of the Federal navigation channel over the next 20 years.

Site # (informational) State - approx. river mile. (O-Oregon; W-Washington)
Common Name (informational)
Ownership (informational)
Local Jurisdiction (regulatory)
Acreage (informational)
Capacities: (informational) The total capacity is the approximate cubic yard volume of the site based on surface area and disposal height. In cases where the site has been used in the past, the amount of material previously placed at the site is given, along with the site's remaining capacity.
Local Zoning Designation (regulatory)
Environmental, Engineering, and Land Use Issues: (regulatory) The major environmental, engineering, and land use issues that must be addressed prior to obtaining approval to use the site are listed under this heading.
Special Conditions on Use: (regulatory) This list gives regulatory conditions that ensure that the major issues are addressed. These should be attached to the local permit or federal consistency review for the site.