20250901 21081100 1.0 TRUE Substrate_Component_Estuary_ColumbiaRiver_Estuary This layer is a polygon file containing CMECS Substrate Component classes for the Columbia River estuary. Substrate is defined in CMECS as “the non-living materials that form an aquatic bottom or seafloor, or that provide a surface (e.g., floating objects, buoys) for growth of attached biota. Substrate may be composed of any substance, natural or manmade”.There are three primary CMECS substrate types: Biogenic, Geologic, and Anthropogenic. This worked was completed by the PSMFC GIS Team with funding from Oregon Coastal Management Program via NOAA.