PSMFC GIS, Pacific States Marine Fisheries Commission, GIS 20171130 1.0.1 vector digital data This product was created by the Pacific Marine and Estuarine Fish Habitat Partnership, and is part of a spatial data system for estuarine and nearshore environments for the West Coast of the contiguous United States. For more information, email gis@psmfc.org Vers. 1.0.1: Fixed spelling errors in 2 estuaries (Tulalip Bay and Elwha River) http://www.pacificfishhabitat.org/data/estuary-extents https://www.wildlife.ca.gov/Data/BIOS https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/2700_2799/ds2792.zip Accurate mapping of tidal wetlands is vital for effective conservation and restoration of these valued habitats, and good mapping is key to strategic planning for coastal resilience. Tidal wetlands are defined by regular inundation by the tides; therefore, mapping of tidal wetlands should be based on knowledge of tidal water levels and the land areas inundated by the tides. We developed this tidal wetland mapping following that principle. Briefly, we used a method developed in Oregon that combines NOAAs extreme water level models (https://tidesandcurrents.noaa.gov/est/) with high-resolution LIDAR digital elevation models (DEMs) to map areas subject to tidal inundation. We refined the mapping using additional data sources such as the National Wetland Inventory, local knowledge, and aerial photo interpretation. Detailed information on the Oregon methods can be found here: http://www.coastalatlas.net/documents/cmecs/EPSM_CoreGISMethods.pdfOur mapping includes areas currently inundated by the tides -- current tidal wetlands -- from ocean to head of tide, including the freshwater tidal zone. To assist restoration planning, our mapping also includes historical tidal wetlands -- areas that were historically inundated by the tides, but are no longer inundated by the tides due to human alterations to the landscape such as dikes and tide gates. Although the mapping does not yet distinguish current from historical (disconnected) tidal wetlands, a future mapping phase (currently in the data development phase) will provide that information.Note: This subset of data represents the approximate extent of current and historical tidal wetlands for PMEPs 444 estuaries, excluding unassociated extents and mouth connection areas. Data clipped to the state of California with a 5 mile buffer by CDFW staff ------------------------------------------------------------------------------------------------ This layer represents the current and historical tidal wetlands, or estuary extent, for the West Coast of the contiguous United States. Complete As needed -124.7 -117 49.0 32.5 Oregon Metadata Keyword Thesaurus - Bioscience aquatic habitat, marsh, wetlands Oregon Metadata Keyword Thesaurus – Geoscience bay, coast, coastal basin, coastal environment, coastal plain, coastline, environment, estuary, floodplain, harbor, lagoon, lowland, natural resource, ocean, port, river, river delta, stream, stream delta, surface water, tide, tide flat, water Oregon Metadata Keyword Thesaurus – Hydrography bay, estuaries, high tide, inundation, marsh, slough, stream, streams, surface water, tide, wetland Oregon Metadata Keyword Thesaurus – Land Cover / Land Use estuary, marsh, swamp, tidal ISO 19115 Topic Categories biota elevation environment inlandWaters oceans None North America, United States of America, West Coast, Pacific Ocean, California Oregon Metadata Keyword Thesaurus – Stratum Biosphere > Aquatic > estuarine, estuarine, land surface, surface Oregon Metadata Keyword Thesaurus – Temporal modern, recent None Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.This product is for informational purposes only and is not intended for navigational, legal, engineering, or surveying purposes; it is provided with the understanding that conclusions drawn from the information are the responsibility of the user. Pacific States Marine Fisheries Commission PSMFC GIS GIS Team mailing and physical

205 SE Spokane St., Suite 100

Portland OR 97202 US 503-595-3100 gis@psmfc.org Pacific States Marine Fisheries Commission PSMFC GIS GIS mailing and physical

205 SE Spokane St., Suite 100

Portland OR 97202 US 503-595-3100 gis@psmfc.org Pacific Marine and Estuarine Fish Habitat Partnership, PSMFC GIS, Oregon Coastal Management Program (Department of Land Conservation and Development), NOAA-NWFSC, PC Trask Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 20120301 Accessed 6/3/2016 http://www.pugetsoundnearshore.org/technical_papers/psnerp_strategies_maps.pdf Prepared for the Bonneville Power Administration, U.S. Army Corps of Engineers, and NOAA Fisheries. Portland, Oregon. 20120601 June 2012 https://coast.noaa.gov/data/digitalcoast/pdf/cmecs.pdf Hiroo Imaki, NOAA Northwest Fisheries Science Center, GIS Specialist The development of this layer was a complex, iterative process including extensive review and input from PMEP members. For additional questions about specific methods used in the development of this layer, please contact PSMFC GIS staff (gis@psmfc.org). None West Coast Estuary Candidate 20160218 Following Oregon’s methods, an upper boundary for intertidal wetlands was created using NOAA’s Extreme Water Levels analysis (https://tidesandcurrents.noaa.gov/est/). NOAA Extreme Water Levels analysis provides several exceedance level water elevations (1%, 10%, 50%, and 99%). These represent annual probabilities of water levels exceeding the given elevation – probabilities of 1%, 5%, 50%, and 99% respectively. This analysis is based upon the observed water levels during a period of at least 30 years, which includes the water level elevations associated with storms and floods. Using field ground-truthing, Oregon’s team (Oregon Coastal Management Program – DLCD) determined that the 50% exceedance contour was a good fit for the approximate maximum extent of tidal wetland habitats. The 50% exceedance value was calculated using NOAA’s existing network of observed locations and NOAA’s Vertical Datum Transformation Tool, or VDatum (https://vdatum.noaa.gov/welcome.html). Values were extrapolated for the estuaries where no VDatum coverage were available using the Euclidean allocation method. The seaward boundary for Salish Sea estuaries was established using a depth contour of minus 4 meters NAVD88. (Note: This depth was updated to minus 4 meters MLLW during a later processing step.) Generally, elevation data came from the NOAA Office for Coastal Management Coastal Inundation Digital Elevation Model data. https://coast.noaa.gov/slrdata/ These DEMs are part of a series of DEMs produced for the NOAA Office of Coastal Management’s Sea Level Rise and Coastal Flooding Impacts Viewer. The DEMs include the best available LiDAR data known to exist at the time of DEM creation for each Weather Forecast Office (WFO). The resolution of each DEM is approximately 5 meters, though some areas may have higher resolutions. Downloaded from https://coast.noaa.gov/htdata/raster2/elevation/SLR_viewer_DEM_6230/ - WA_SEW1_GCS_5m_NAVD88m - WA_SEW2_GCS_5m_NAVD88m - WA_SEW3_GCS_5m_NAVD88m - WA_PQR_GCS_5m_NAVD88m - OR_MFR_GCS_5m_NAVD88m - OR_PQR1_GCS_5m_NAVD88m - OR_PQR2_GCS_5m_NAVD88m - CA_EKA1_GCS_5m_NAVD88m - CA_EKA2_GCS_5m_NAVD88m - CA_LOX1_GCS_5m_NAVD88m - CA_LOX2_CGS_5m_NAVD88m - CA_MTR1_GCS_5m_NAVD88m - CA_MTR2_GCS_5m_NAVD88m - CA_MTR3, GCS_5m_NAVD88m - CA_SGX_GCS_5m_NAVD88m Additional elevation data utilized in the Salish Sea region includes the Combined bathymetry and topography of Puget Lowland (Finlayson, 2005), and the Puget Sound Digital Elevation Model (Finlayson, 2000). Finlayson D.P., Haugerud R.A., Greenberg, H. and Logsdon, M.G. (2000) Puget Sound Digital Elevation Model. University of Washington, (https://www.ocean.washington.edu/data/pugetsound/psdem2000.html Finlayson D.P. (2005) Combined bathymetry and topography of the Puget Lowland, Washington State. University of Washington, (https://www.ocean.washington.edu/data/pugetsound/psdem2005.html) Additional elevation data utilized in the San Francisco Bay/Sacramento-San Joaquin Delta region came from California Department of Water Resources, NOAA, and USGS. 1. 10-meter bathymetry - California DWR: (https://data.noaa.gov/dataset/2009-2011-ca-coastal-california-topobathy-merged-project-digital-elevation-model-dem) 2. 2-meter topo/bathy – NOAA (https://data.noaa.gov/dataset/2009-2011-ca-coastal-california-topobathy-merged-project-digital-elevation-model-dem) 3. 10-meter Digital Elevation Model – USGS National Elevation Dataset (https://catalog.data.gov/dataset/usgs-national-elevation-dataset-ned) Additional elevation data from the Puget Sound Lidar Consortium (http://pugetsoundlidar.ess.washington.edu/lidardata/) were utilized to cover areas around the Olympic Penninsula. Clallam County: 2001-02clallam http://pugetsoundlidar.ess.washington.edu/lidardata/restricted/projects/2001-02clallam.html Olympic Peninsula: 2005olympic http://pugetsoundlidar.ess.washington.edu/lidardata/restricted/projects/2005olympic.html Hoh River Watershed: 2012-13hoh http://pugetsoundlidar.ess.washington.edu/lidardata/restricted/projects/2012-13hoh.html 20160621 https://www.ngs.noaa.gov/CUSP/ onLine CUSP NOAA’s Continually Updated Shoreline includes all national shorelines that have been verified by contemporary imagery and shoreline from other non-NOAA sources. This shoreline vector only includes shoreline and alongshore features that represent shoreline (groin, breakwater, and jetty). These data provide available contemporary high-resolution national shoreline. The shoreline is a representation based on an office interpretation of imagery or derived from Lidar. Shoreline vectors were verified with contemporary imagery. Sources of non-NOAA vector shoreline included U.S. Fish and Wildlife Service, North Carolina Department of Environment and Natural Resources, and U.S. Geological Survey. Non-NOAA imagery sources for interpreting shoreline included USDA-FSA Aerial Photography Field Office, ESRI Imagery World 2D (USGS, U.S. Geological Survey, and U.S. Department of Agriculture), Bing Maps Imagery Service, and Google Earth (TerraMetrics and DigitalGlobe). 20140701 http://spatialdata.oregonexplorer.info/geoportal/details;id=e53a8aa7db51458fae9524bbfc503ffc onLine 20040101 20140731 Unknown Oregon Continually Updated Shoreline Product OCMP - 2015 This data layer is an element of the Oregon GIS Framework. The Oregon CUSP shoreline represents a "best of" attempt to create a continuous Mean High Water Shoreline for use in GIS analysis and inventory work. Whenever possible the Oregon CUSP shoreline references a mean-high water shoreline based upon vertical modelling or image interpretation, using both water level stations and/or shoreline indicators. CUSP is primarily built from LiDAR NGS National Shoreline data for the outer Pacific Ocean coast and Oregon Lidar Consortium data for the inner estuarine coast. 20160101 Version 2 https://www.fws.gov/wetlands/data/State-Downloads.html 24000 onLine 19800101 20141231 State data for the Washington, Oregon, and California were downloaded on 1/29/2016 from the U.S. Fish and Wildlife Service website @ https://www.fws.gov/wetlands/data/State-Downloads.html on 1/29/2016, and were then merged into one seamless dataset, after removing duplicate features along the boundaries of the states. National Wetlands Inventory (USFWS) This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the conterminous United States. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of "farmed wetlands" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps. 20150401 hardDisk An Inventory and Classification of U.S. West Coast Estuaries Geometries for certain estuary systems in California were digitized as part of “An Inventory and Classification of U.S. West Coast Estuaries” (Heady, et. al., 2015). This inventory identified certain estuaries in California, especially lagoonal systems, were poorly represented in NWI and other available data sources. This group undertook a process to digitize these systems using the latest aerial imagery (Landsat, Google Earth) and the California Coastal Records Project. 20120910 Citation: PC Trask and Associates. United States Army Corps of Engineers 50% Annual Exceedance Probability Stage Profile for Survival Benefit Unit for the Lower Columbia River Estuary, 2011: Portland, OR. hardDisk ERTG 2012-01, Rev 1 Description from Resulting Study: The Expert Regional Technical Group (ERTG) of the Columbia Estuary Ecosystem Restoration Program conducted an Analysis of Water Levels for Site Delineation in Tidal-Dominated Regions (ERTG 2012-01, Rev 1) to identify sites suitable for restoration in the Columbia River Estuary. For this analysis, the ERTG developed a standard hydrological modeling method to determine the maximum water level that would recur every other year (the 2-year river flood event), which they also refer to as the “50% annual exceedance probability.” None 20160726 20160928 Unknown PMEP_DataReview_Notes Members of the Pacific Marine and Estuarine Fish Habitat Partnership (PMEP) were provided the opportunity to review the estuary extent data during the data development process. Members provided input to the mapping based on their expert knowledge and professional experience with West Coast estuaries. In some cases, these inputs resulted in modifications to the estuary extent. Hiroo Imaki, NOAA Northwest Fisheries Science Center, GIS Specialist hardDisk Minus 4-Meter MLLW Depth Contour In order to establish a consistent seaward boundary for non-lagoonal estuaries in the Salish Sea, as well as to define estuary classes within the Coastal and Marine Ecological Classification Standard, a depth contour of minus 4 meters below Mean Lower Low Water (MLLW) was created by Hiroo Imaki (NOAA - NWFSC). This layer was created using NOAA’s Coastal Digital Elevation Models (DEMs), which integrate bathymetric and topographic DEMs and are used to support tsunami forecasting and warning efforts. These are also referred to as Integrated Models of Coastal Relief. DEMs Utilized: Arena Cove, Astoria_V3, Central OR Coast, Crescent City, Eureka, Fort Bragg, Garibaldi, La Push, Monterey, Port Orford, Port San Luis, Port Townsend, San Diego, San Francisco Bay, Santa Barbara, Santa Monica, Taholah. https://www.ngdc.noaa.gov/mgg/coastal/coastal.html The following datasets were used to fill in gaps in coverage of NOAA’s Coastal DEMs: Combined Bathymetry and Topography DEM of Western Washington State (October 2000): https://www.ocean.washington.edu/data/pugetsound/psdem2000.html California State Waters Map Series Data Catalog, from the California Seafloor Mapping Program (CSMP): Fort Ross and Salt Point https://pubs.usgs.gov/ds/781/ Central California, CA 1 arc-second MHW DEM, from NOAA’s National Geophysical Data Center (NGDC). https://www.ngdc.noaa.gov/dem/squareCellGrid/download/739 US Coastal Relief Model – Southern California Version 2, from NOAA’s National Geophysical Data Center (NGDC). https://www.ngdc.noaa.gov/mgg/coastal/grddas06/grddas06v2.htm PSMFC GIS staff applied a smoothing algorithm to the data (Smoothing Algorithm = PAEK, Tolerance = 50 meters) in order to produce a more natural appearing depth contour. 20140501 1.0 This data source and associated documentation was utilized extensively throughout the development of this dataset, and served as an invaluable reference layer for applying this methodology to Washington and California. PMEP is thankful to OCMP staff for their pioneering work to map Oregon’s estuaries using the CMECS standard, and for their assistance with helping PMEP expand this important resource to the U.S. West Coast. http://www.coastalatlas.net/documents/cmecs/EPSM_CoreGISMethods.pdf. hardDisk 20000101 20121231 The estuary extent for most Oregon estuaries in PMEP’s estuary extent layer is based on a dissolved merge of the Aquatic Setting and Biotic Component layers from OCMP, which have some minor differences in extent. This data source is used for all estuaries within Oregon which were mapped as part of Version 0.4.1 of Oregon’s CMECS estuary mapping project. The “Data_Source” field identifies OCMP as the source for these estuary extents. CMECS Estuarine Aquatic Setting v.0.4.1, OCMP, 2014 / CMECS Estuarine Biotic Component v.0.4.1, OCMP, 2014 The Oregon Coastal Management Program’s (OCMP) Oregon Estuary Project of Special Merit produced estuary and shorelands habitat map information, using the federally adopted Coastal and Marine Ecological Classification Standard (CMECS) version 4.0. For detailed documentation on the OCMP estuary mapping project, please visit http://www.coastalatlas.net/documents/cmecs/EPSM_CoreGISMethods.pdf. PSMFC GIS, Pacific States Marine Fisheries Commission, GIS hardDisk PMEP Estuary Split Lines (unpublished) The data processing steps required in order to delineate estuary extents established contiguous polygons dissolved from various source inputs, representing the current and historical estuary extent. Certain estuaries coalesce into a single polygon from the various source inputs, but have been categorized and inventoried as separate, unique estuaries. A line layer, “PMEP Estuary Split Lines”, was created in order to split these larger polygons into single estuary extents. One example of an estuary “complex” requiring many dividing lines is the area from Cabrillo Marina to the Bolsa Chica Lowlands in Southern California. This area, encompassing both the Long Beach and Los Angeles Harbors, is divided into 11 individual estuaries from one large polygon, using this layer. Source geometry utilized in creating this splitting layer include the Watershed Boundary Dataset (USGS), regional data layers (Columbia River Estuary Ecosystem Classification, California Bay-Delta regions), shoreline data, and visual/heads-up digitizing. PSMFC GIS, Pacific States Marine Fisheries Commission, GIS hardDisk PMEP Estuary Extent Selector (unpublished) The link between the estuary extent polygon layer, which is dissolved from various source inputs, and the estuary point layer, requires a companion layer to select these polygons and associate them with the point layer and estuary ID. The “Estuary Extent Selector” polygon layer was created to establish and maintain this link. This layer also establishes which estuary areas are considered part of a specific estuary, and which are considered as part of other, “unassociated” extents. This layer is utilized in the publishing of the estuary extent layer. Source geometry for this layer between contiguous estuaries is from the PMEP Estuary Split Lines layer. The other areas of geometry are based on general areas of contiguous or larger estuary extent polygons, and are used to identify and code estuary extent areas within the polygons. In some cases, this geometry has been modified to include or exclude estuary extent areas from association with a particular estuary system, based on expert review. hardDisk PMEP Regions The PMEP Regions layer depicts ecoregions, used to categorize PMEP data into broad groups, reflecting differences in geography and large-scale marine processes affecting the estuaries. The original basis for these regions was the Marine Ecoregions of the World (MEOW) dataset from the World Wildlife Fund and The Nature Conservancy. This dataset was modified to capture inland watershed areas based on the Watershed Boundary Dataset, and some names were altered to commonly used West Coast names. Additionally, the boundary was altered between the Washington, Oregon, Northern California Coast Region (“Oregon, Washington, Vancouver Coast and Shelf” in MEOW dataset), and the Salish Sea Region (“Puget Trough/Georgia Basin” in MEOW), to include all estuaries along the Strait of Juan Fuca within the Salish Sea Region. Use NOAA’s Continually Updated Shoreline Product (CUSP), and Oregon’s Continually Updated Shoreline Product (OCMP CUSP) in order to establish the seaward extent of the estuaries (only for estuaries outside of the Salish Sea). The two shoreline datasets were merged into one layer, ‘Shoreline_PMEP_CUSP_wcm”, after creating a field (“DataSource”) to track the inputs. A new field was added to code the type of shoreline feature (“PMEP_Type”). Options in this field include “coast” (outer coast), “inside estuary”, “N/A” (sea stacks, rocks, islands, etc.), “remove” (NOAA’s CUSP overlapping with Oregon’s CUSP), and “seaward” (newly digitized line to limit seaward estuary extent). Any features created outside of the two data source inputs will have “DataSource” = ‘PMEP’. The only other changes to the input geometry involve splitting the line segments at specific locations, and assigning shorelines types in a new field, “PMEP_Type”, as appropriate. 20160209 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org Based on Oregon’s methodology, select classes of the National Wetlands Inventory (NWI) that extended beyond the 50% exceedance layer were appended to the dataset, which will now be called ‘PMEP Estuary Extent Source’ layer. This will be the primary spatial layer which is appended to and modified in the development of the estuary extent layer in the following Process Steps. NWI classes appended to the dataset are, all Estuarine system classes and all Palustrine and Riverine system classes with tidal modifiers (‘S’, ‘Q’, ‘R’, ‘T’, and ‘V’). All NWI codes within the PMEP Estuary Extent Selector polygon were exported into a table and the “Attribute” field was decoded into the NWI levels (System, Subsystem, Class, Subclass, and Modifiers) for ease of use. It was determined that certain Attributes within these codes contained case errors which caused incorrect Attribute level codes to be assigned. The NWI Wetland Coder Interpreter tool (available @ https://www.fws.gov/wetlands/data/wetland-codes.html) was used to fix these errors. Examples of this error are: E1UBLH (should be E1UBLh) and E2EMPS (should be E2EMPs). 20160212 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org Using available imagery sources, including the National Agriculture Imagery Program (NAIP), historical imagery available in Google Earth, and other imagery sources, a new extent type was added to the PMEP Estuary Extent Sources layer to depict areas beyond the current estuary extent where the estuary mouth was present in other imagery sources. These polygons are contiguous with the mapped estuary, and are inland of the PMEP shoreline layer. 20160219 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org The extent of the Estuary Regional Technical Group’s (ERTG) Columbia River 2 Year Flood Elevation (also called “50% Annual Exceedance Probability”) was appended to the PMEP Estuary Extent Sources layer, where it extended beyond the current extent of that layer. 20160224 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org For California estuaries classified as lagoonal, append the estuary extent for those areas which are beyond the current PMEP Estuary Extent Source layer, using data from “An Inventory and Classification of U.S. West Coast Estuaries” (Heady, et. al, 2015). These data were created through a process which included digitizing based on the latest aerial imagery (Landsat, Google Earth, and the California Coastal Records Project), where NWI or other sources were obviously incorrect, or not available. 20160307 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org The Pacific Marine and Estuarine Fish Habitat Partnership (PMEP) conducted an internal review process to solicit feedback on the draft estuary extent mapping. A password-protected web mapping application was created to allow PMEP members to provide input on the estuary layer. Once input was complete, these point locations were categorized into types based on the nature of the input given. Feedback which was determined to be actionable and within the scope of the current process was categorized as such. Edits were then made to the PMEP Estuary Extent Source layer, or the PMEP Estuary Extent Selector layer, as necessary to make the desired modifications. 20160510 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org The 50% Exceedance layer established the upslope extent of the current and historical estuaries in the Salish Sea region, but there needed to be a process to determine which areas would be specifically established in PMEP’s estuary mapping. Previously, the “Inventory and Classification of U.S. West Coast Estuaries” (Heady, et. al., 2015) had utilized the seven estuary subbasins for the U.S. portion of the Salish Sea, as established by the Puget Sound Nearshore Ecosystem Restoration Project (PSNERP). PMEP desired to map individual Salish Sea estuaries within these subbasins in greater detail, using the 50% Exceedance layer and NWI sources for geometry. The PSNERP technical report “2012-01: Strategies for Nearshore Protection and Restoration in Puget Sound” (http://www.pugetsoundnearshore.org/technical_papers/psnerp_strategies_maps.pdf) developed a landscape-based framework for restoration and protection of nearshore ecosystem sites. This report included a detailed assessment of 1,544 overlapping sites among four landscape classes: deltas (16), beaches (744), barrier embayment systems (518), and coastal inlets (266). Data representing site potential and degradation were developed and analyzed using both remotely-sensed and field data. For each strategy, sites were ranked using a potential score, and were placed into groups, based on their similarity. Groups of sites with the highest ranking were assigned a high potential score. All site data from this assessment can be found in Appendix B of the report. Sites in bold with darker shading are “high potential” sites based on potential group, as discussed in the report recommendations section. While PSNERP’s nearshore sites are mapped using different methods and at a different scale than the estuaries as mapped by PMEP, we utilized this resource to cross-reference PMEP’s estuary extent with the high-potential barrier embayment and coastal inlet sites, as identified in the report and the associated geodatabase. We included these locations in our estuary mapping, with other mapped estuary extent areas becoming “unassociated extents” in the PMEP data structure. We also included all 16 major river deltas in our mapping products. Nearly 150 estuaries in the Salish Sea PMEP Region were identified and explicitly included in PMEP’s mapping products by referencing the PSNERP technical report’s high-potential sites. 20160603 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org For non-lagoonal estuaries in the Salish Sea region, a layer was created to consistently establish a seaward boundary for the mapped estuary extents. It was determined that the most suitable layer for this purpose would be a bathymetric depth contour. For lagoonal systems in the Salish Sea, the shoreline layer determined the seaward boundary. GIS Specialist Hiroo Imaki (NOAA Northwest Fisheries Science Center) created line layer depicting the 4 meter depth contour below Mean Lower Low Water (MLLW), using NOAA’s (National Geophysical Data Center) Integrated Models of Coastal Relief digital elevation models (DEMs). PSMFC GIS staff projected the data to the West Coast Custom Mercator projection and then applied a line smoothing algorithm to this layer in order to produce a more natural looking depth contour layer (Smoothing Algorithm = PAEK, Smoothing Tolerance = 50 meters). Once the smoothing was applied to the Minus 4-meter MLLW layer, all non-lagoonal estuaries in the Salish Sea region were extended, or trimmed so that the seaward extent was coincident with this line. This process added a new type of source to the PMEP Estuary Extent Sources layer for some Salish Sea estuaries, called “minus 4 MLLW extension”. 20170330 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org The series of steps required in order to transform the PMEP Estuary Extent Source layer into the final estuary extent layer involves a number of geoprocessing tasks, many of which are accomplished using the ModelBuilder tool in ArcCatalog (part of Esri’s ArcMap product). This visual programing language for building GIS workflows allows for numerous geoprocessing steps to be automated, allowing for repeated use and providing documentation for the process. The following steps are required for deriving the final estuary extent layer from the PMEP Estuary Extent Source layer: Model 1: PMEP_Estuary_Extent_Processing_01 Dissolves selected features from the ‘PMEP Estuary Extent Sources’ layer into contiguous features. Those features not included in this process include those flagged as being outside of the estuary extent, extents digitized to represent the range of the estuary mouths (estuary mouth connection areas), as well as any estuary extents which overlap with Oregon’s estuary mapping. Dissolves line features in ‘PMEP Estuary Extent Split Lines’ layer based on “LineGroup” field. Manual Process 1: Split estuary extent using dissolved split lines. Bring the 2 output layers (“PMEP_Estuary_Extent_Split_Lines_Dissolved” and “PMEP_Estuary_Extent_Dissolve_Model01”) created in the model “PMEP_Estuary_Extent_Processing_01” into an ArcMap session. Make the line layer the only selectable layer and start editing the polygon layer. Open the line layer and select one feature (e.g. LineGroup = 1). On the Advanced Editing toolbar, click on the Split Polygons tool. When prompted, select the Target to be the polygon layer (“PMEP_Estuary_Extent_Dissolve_Model01”), then click OK. This will split the polygon using the selected line feature, effectively dividing the estuary extent into two or more features. Repeat this step for all remaining features in the line dataset. Save edits when done. Model 2: PMEP_Estuary_Extent_Processing_02 This model takes the output of the splitting step (PMEP_Estuary_Extent_Dissolve_Model01), the Oregon Coastal Management Program’s (OCMP) estuary extent (CMECS aquatic and biotic layers, dissolved), and the estuary mouth connection areas and attributes them with codes indicating their extent type and data source. These layers are then merged into one dataset, “PMEP_Estuary_Extent_Merged”. Manual Process 2: Split Select OCMP estuaries using dissolved split lines. Add the layer “PMEP_Estuary_Extent_Merged” and the “PMEP_Estuary_Extent_Split_Lines_Dissolved” layer into an ArcMap session. Make the line layer the only selectable layer and start editing the “PMEP_Estuary_Extent_Merged” layer. Open the line layer table and select LineGroup = 22. On the Advanced Editing toolbar, click on the Split Polygons tool. When prompted, selecte “PMEP_Estuary_Extent_Merged” as the target, and then click “OK”. Repeat with LineGroup = 23. Save edits when done. Manual Process 3: Assign IDs/Associate Extents This step takes the estuary extent layer and performs a simple spatial join to associate IDs from the overlay layer with those polygons within them. Note that this tool causes the ModelBuilder application to crash, so it must be done from the tool in ArcCatalog, or within an ArcMap session. Spatial Join Tool Parameters: Target Features: PMEP_Estuary_Extent_Merged Join Features: PMEP_Estuary_Extent_Overlay_Selector Output Feature Class: PMEP_Estuary_Extent_Merged_Selector_Join Join Operation: JOIN_ONE_TO_ONE Keep all target features: yes Field Map of Join Features: Extent_Type (Text) Date_Source (Text) Extent_Type (Text) PMEP_EstuaryID (Short) Estuary_Name (Text) Link (Text) Match Option: WITHIN Model 3: PMEP_Estuary_Extent_Processing_03 This model dissolves the estuary extent areas and the mouth connection areas at the Estuary ID level. It also attributes unassociated extent areas. It then merges the three components into a new dataset, and then calculates the area (in acres) of each type of estuary extent. Model 4: PMEP_Estuary_Extent_Processing_04 This step calculates the area of each estuary extent polygon in acres (using the custom West Coast Mercator projection) and categorizes them as estuary acres, or as other areas (e.g. mouth connection areas do not count towards estuary area). It also joins a count of the number of contiguous estuary polygons which make up the multi-part dissolved estuary extent. 20170515 Pacific States Marine Fisheries Commission PSMFC GIS GIS gis@psmfc.org Vector GT-polygon composed of chains 193 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds2792 This layer represents the current and historical tidal wetlands, or estuary extent, for the West Coast of the contiguous United States. Note that estuaries were included based on their current or future potential to provide habitat for fish species. PMEP OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. Esri Coordinates defining the features. Extent_Type The Extent_Type field categorizes the estuary layer into categories which establish which estuarine extent areas are part of PMEP’s inventory, and which are not (unassociated extents). Additionally, areas representing the recent variability in the location of the estuary mouths (“estuary mouth connection areas”), are coded in this field and do not contribute to the measured extent of an estuary. PMEP approximate extent of tidal wetlands historical or current estuary areas which are a part of PMEP's inventory PMEP estuary mouth connection area areas representing the recent variability in the location of the estuary mouths (note: these areas do not contribute to the measured extent of an estuary and are for reference purposes only) PMEP unassociated extent areas of historical or current estuary extent which are not associated with PMEP’s inventory PMEP Data_Source The organization, or organizations, whom provided spatial data for the estuary extent. PMEP OCMP Oregon Coastal Management Program (Oregon Department of Land Conservation and Development) PMEP PMEP Pacific Marine and Estuarine Fish Habitat Partnership PMEP PMEP/PC Trask Pacific Marine and Estuarine Fish Habitat Partnership and PC Trask and Associates PMEP PMEP_EstuaryID unique identifier for each estuary included in PMEP estuary inventory PMEP 1000 - 1999 ID range for ‘Salish Sea’ PMEP Region estuaries. These IDs were originally assigned in a general clock-wise order, from Points Roberts (1000) to Sail River (1165). PMEP 2000 - 2999 ID range for ‘Washington, Oregon, Northern California Coast’ PMEP Region estuaries. These IDs were originally assigned in a north to south order, from the Waatch River in Washington (2000) to the Bear River in Northern California (2109). PMEP 3000 - 3999 ID range for ‘Central California’ PMEP Region estuaries. These IDs were originally assigned in a north to south order within California, from McNutt Gulch (3000) to Jalama Creek (3106). PMEP 4000 - 4999 ID range for ‘Southern California Bight’ PMEP Region estuaries. These IDs were originally assigned in a north to south order within Southern California, from Canada de la Gaviota Creek (4000) to the Tijuana River (4060). PMEP Count_Polygons This value represents the number of individual polygons which contribute to the estuary extent. Note that the final estuary extent layer is a multi-part feature type, and that many of the estuaries consist of many individual polygons. This value does not represent the number of PMEP Estuary Extent Source polygons, but represents the number of dissolved individual polygons which are derived from those data. PMEP These data are calculated as part of the estuary publishing process and are based on feature geometry representing the estuary extent. Estuary_Name The name of the estuary. Values in this field were generally obtained from the names in the “An Inventory and Classification of U.S. West Coast Estuaries” (Heady, et. al, 2014), although there are exceptions. Estuaries added to the PMEP estuary list utilized official or commonly used estuary names, the name of the major river or creek connecting with the estuary, or used local landmarks in the absence of another name source. PMEP These data are based on geographic names. Link "PMEP EstuaryID"_"Estuary Name" This unique key is used to link various data across the PMEP spatial data system. PMEP PMEP_Region The PMEP Region (or ecoregion) which the estuary is located in. PMEP Salish Sea All watersheds draining into Salish Sea from within Washington State, which includes the estuarine/marine areas of Puget Sound and the Strait of Juan de Fuca out to Cape Flattery within the U.S. Maritime Boundary. PMEP Washington, Oregon, Northern California Coast All Watershed Boundary Dataset (WBD) Subbasins draining into the Pacific Ocean from within Washington State (excluding the Salish Sea), Oregon and Northern California, from Cape Flattery (Washington) south to Bear River in Northern California. The exception to this standard is the inland extent of the Columbia River/Willamette River, which is based on WBD watersheds (HUC 10) overlapping the mapped estuary extent. The seaward extent of this region is based on a 200 meter depth contour. PMEP Central California All Watershed Boundary Dataset (WBD) Subbasins draining into the Pacific Ocean from within California, from Bear River in Northern California south to Jalama Creek, near Point Conception California. The exception to this standard is the inland extent of the Sacramento-San Joaquin Delta, which is based on WBD watersheds (HUC 10) overlapping the mapped estuary extent. The seaward extent of this region is based on a 200 meter depth contour. PMEP Southern California Bight All Watershed Boundary Dataset (WBD) Subbasins draining into the Pacific Ocean from within Southern California, from Jalama Creek, near Point Conceoption, south to the U.S.-Mexico border. The seaward extent of this region is based on a 200 meter depth contour. PMEP CMECS_Class Landscape-level geomorphological features from the coast to mid-ocean spreading centers. These large features can cross tectonic settings, and they can be delineated at a scale of 1:1,000,000 (or greater) using bathymetric maps and other remote sensing data. Each setting will normally contain a wide variety of the smaller geoform features. Coastal and Marine Ecological Classification Standard (CMECS), Federal Geographic Data Committee, 2012. Embayment/Bay A water body with some level of enclosure by land at different spatial scales. These can be wide, curving indentations in the coast, arms of the sea, or bodies of water almost surrounded by land. These features can be small—with considerable freshwater and terrestrial influence—or large and generally oceanic in character. CMECS Lagoonal Estuary This class of estuary tends to be shallow, highly enclosed, and have reduced exchange with the ocean. They often experience high evaporation, and they tend to be quiescent in terms of wind, current, and wave energy. Lagoonal estuaries usually have a very high surface-to-volume ratio, a low-to-moderate watershed-to-water-area ratio, and can have a high wetland-to-water ratio. The flushing times tend to be long relative to riverine estuaries and embayments because the restricted exchange with the marine-end member and the reduced river input lengthen residence times. As such, there tends to be more benthic-pelagic interaction, enhanced by generally shallow bathymetry. Additionally, exchange with surrounding landscapes (often riparian wetland and palustrine systems) tends to be enhanced and more highly coupled than in other types of estuaries. Occasionally, a lagoon may be produced by the temporary sealing of a river estuary by a barrier. Such lagoons are usually seasonal and exist until the river breaches the barrier; these lagoons occur in regions of low or sporadic rainfall. CMECS Major River Delta The nearly flat, alluvial tract of land at the mouth of a river, which commonly forms a triangular or fan-shaped plain. It is crossed by many distributaries, and the delta is the result of sediment accumulation from the river. Deltas are distinguished from alluvial fans by their flatter slope. Examples of this feature type include the Mississippi Delta, the Nile Delta, and the Ganges Delta. All deltas are dynamic areas of mixed-water flow and salinity. CMECS Riverine Estuary This class of estuary tends to be linear and seasonally turbid (especially in upper reaches), and it can be subjected to high current speeds. These estuaries are sedimentary and depositional, so they may be associated with a delta, bar, barrier island, and other depositional features. These estuaries also tend to be highly flushed (with a wide and variable salinity range) and seasonally stratified. Riverine estuaries have moderate surface-to-volume ratios with a high watershed-to-water-area ratio—and they can have very high wetland-to-water-area ratios as well. These estuaries are often characterized by a V-shaped channel configuration and a salt wedge. CMECS Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. Estuary_Hectares The area of the current and historical tidal wetlands of the estuary, in hectares, as calculated using Custom West Coast Albers projection. Note that “mouth connection area” extents are not included in this value. PMEP These data are calculated based on the feature geometry. Pacific States Marine Fisheries Commission PSMFC GIS GIS mailing and physical

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Portland OR 97202 US 503-595-3100 gis@psmfc.org West Coast USA Current and Historical Estuary Extent (zipped file geodatabase, email registration required for download) See access and use constraints information. File Geodatabase Feature Class (Esri) 10.5.1 .zip 56 https://psmfc.sharefile.com/d-sd5549256838430ba West Coast USA Current and Historical Estuary Extent (zipped file geodatabase, email registration required for download) https://honu.psmfc.org/server/rest/services/PMEP/West_Coast_USA_Current_and_Historical_Estuary_Extent/MapServer http://psmfc.maps.arcgis.com/home/item.html?id=29d63729a5d64e74a9c300e71ca29034 This layer represents the current and historical tidal wetlands, or estuary extent, for the West Coast of the contiguous United States. http://www.pacificfishhabitat.org/data/estuary-extents Website for PMEP's Estuary Extent layer. 20180215 Pacific States Marine Fisheries Commission PSMFC GIS GIS mailing and physical

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Portland OR 97202 US 503-595-3100 gis@psmfc.org FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time This product is for informational purposes only and is not intended for navigational, legal, engineering, or surveying purposes; it is provided with the understanding that conclusions drawn from the information are the responsibility of the user.