Chum Salmon (Hood Canal summer-run ESU) polygon

Hydrologic Unit Boundaries for Oregon, Washington, and California

NOAA Electronic Navigational Charts

Puget Sound Digital Elevation Model

Washington ShoreZone Inventory Data Dictionary

Water Resource Inventory Areas of Washington

Data creation process 2004 - 2005

cmhcs_nchf1.shp

1) Reclassify Puget Sound DEM. Original elevation measurements were in decimeters. We reclassified the elevation measurements to meters. Finlayson et al. 2000

2) Clip the WA State Saltwater Areas shapefile to the extent of the Puget Sound. WADNR 2001

3) Clip the Puget Sound DEM to the boundary of the Puget Sound. Finlayson et al. 2000; WADNR 2001

4) Derive the marine portion of the nearshore zone from the DEM. Query the clipped Puget Sound DEM for all values less than or equal to 0 meters and greater than or equal to -30 meters. Convert the results of the query into polygons. Finlayson et al. 2000

5) Edge match the polygons with the Puget Sound shoreline. WADNR 2001

6) Using the NOAA Electronic Navigational Charts (ENCs) to fill in the gap in the DEM. There is a gap of no data in the Puget Sound DEM that lies between the San Juan Islands and Bellingham Bay. We used the NOAA ENCs to estimate the area encompassed by the 30 meter bathymetry line. NOAA 2004

7) Identify units within the Puget Sound. We used watersheds (HUC5s) as our units in the freshwater habitat analysis, and decided that for the nearshore area analysis we would define our units based on groupings of HUC5s. We used WRIA and HUC5 boundaries to identify 19 units within the Puget Sound. Where the WRIAs meet the shoreline of the Puget Sound, we edge matched the WRIA boundaries to the HUC5 boundaries. REO 2002; ECY 2000

8) Divide the nearshore zone into 19 units. Overlay the nearshore zone with the 19 units to create the final data set.

9) Identify the subset of nearshore zones that are used by HCS chum salmon. Delete the areas that are not part of the HCS chum salmon ESU.

cmhcs_nchf1.shp (NAD_1927_Albers) geographic transformation, unprojected -> CMHCS_ch_poly.shp (GCS_North_American_1983 wkid 4269).

Geometry was edited (features deleted), attributes were not edited, metadata was edited because it was blank (stored separately as html file "metadata_cmhcs_nchf1").

Deleted features that were not critical habitat from shapefile CMHCS_ch_poly.shp. Deleted features were those with

DESC_ = “Land, not part of nearshore marine area”

DESC_ = “Not part of nearshore marine area”

Features remaining in shapefile had

DESC_ = 'Offshore to a depth of 30 meters' (i.e., only features designated as critical habitat).

The 2019 version CMHCS_ch_poly.shp (GCS_North_American_1983 wkid 4269) was converted into the standardized feature class SalmonChum_HoodCanalsummerrunESU_20050902_poly (GCS_WGS_84 wkid 4326) using the National Critical Habitat Geodatabase processing protocol.

During standardization, geometry was not edited. Attributes were edited. Metadata was edited and populated using the final rule and the 2005 html file "metadata_cmhcs_nchf1" that was stored separately from the source data in cmhcs_nchf1.shp (NAD_1927_Albers).

Migrated fields: "NS_ZONE" into "UNIT", "DESC_" into "NOTES"

Dropped fields: FID, AREA, PERIMETER, CMHCS_NCHF, CMHCS_NC_1, ESUCODE, WRIANUMB, WRIANAME