Seattle Urban Watercourses with Channel Typing and WRIA Codes

Weekly refreshed geospatial data from the City of Seattle displays urban watercourses, including open streams and flow within culverts and drainage lines. The layer includes Washington State Department of Natural Resources channel and fish use typing codes and Department of Ecology Water Resource Inventory Area (WRIA) codes. Data is symbolized by feature type and filtered to show only active features where the expiration date is null.

Use Cases

• Map urban stream networks and drainage infrastructure based on the described feature types.
• Analyze water resource management areas using the included WRIA codes.
• Model fish habitat potential based on the channel typing codes from the Washington State DNR.
• Visualize active watercourses for planning purposes, filtered by the null expiration date.

Strengths

• Data is refreshed weekly, suggesting regular maintenance.
• Includes standardized environmental coding (WRIA and DNR typing codes).
• Available in multiple geospatial and tabular formats, including GeoPackage and CSV.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Visualization is scale-dependent, not displaying beyond a 1:200,000 zoom level.

Provenance

Source

City of Seattle, maintained by DWW Maintenance staff and USM.

Collection Method

Data is displayed from DWW.stream_ln_pv and symbolized on the attribute FEATYPE.

Time Range

Active features only, filtered by STRM_EXPIRATION_DATE IS NULL.

Freshness

Refreshed weekly; last platform update was 2026-03-22.

Geography

Urban watercourses within the City of Seattle, Washington State.