Watershed Data Catalog

Shapefiles & spreadsheets

Data available in GIS Shapefile format for use with ArcGIS. Some PDF spreadsheets available. Metadata is also available.

Maps

Data available as PDF.

Streams surveyed by Clean Water Services (ZIP, 869KB)

Based on data surveyed and collected in the field in 2000-2001. This stream layer covers only our jurisdiction and just outside of it. Metro maintains a shapefile that covers the entire Tualatin basin, based on photo intepretation and other mapping data.

(PDF, 3.5MB)

100-year floodplain (ZIP, 1.2MB)

This data was created for the floodplain update project, was submitted to FEMA on 3-3-06, and replaces any older versions.  While these maps may help developers and others locate floodplains, they are not to be used to determine whether property owners need flood insurance. Only FEMA has that information at www.fema.gov. FEMA also has floodplain data on areas outside the Urban Growth Boundary.

(PDF, 4.8MB)

500-year floodplain (ZIP, 1.1MB)

This data was created for the floodplain update project, was submitted to FEMA on 3-3-06, and replaces any older versions.  While these maps may help developers and others locate floodplains, they are not to be used to determine whether property owners need flood insurance. Only FEMA has that information at www.fema.gov. FEMA also has floodplain data on areas outside the Urban Growth Boundary.

(PDF, 16.2MB)

Floodway (ZIP, 260KB)

This data was created for the floodplain update project and was submitted to FEMA on 3-3-06, and replaces any older versions.  The floodway is the land most severly affected by flooding and must be able to carry and discharge floodwaters.

(PDF, 3.5MB)

Cross sections with water surface elevations (ZIP, 851KB)

Contains 2,5,10,25,50,100 & 500 year Water Surface Elevations. This data was created for the floodplain update project, was submitted to FEMA on 3-3-06, and replaces any older versions.  While these maps may help developers and others locate floodplains, they are not to be used to determine whether property owners need flood insurance. Only FEMA has that information at www.fema.gov. FEMA also has floodplain data on areas outside the Urban Growth Boundary.

(PDF, 5.4MB)

Cross sections with Cross Section ID's (ZIP, 851KB)

Map of stream cross sections with cross section ID's labeled. The purpose of these labels is to connect specific cross sections with HEC-RAS models.

(PDF, 5.3MB)

Effective impervious area of subwatersheds (ZIP, 412KB)

Contains the estimated impervious cover that effectively drains into the surface water system.

(PDF, 3.2MB)

Stream nodes (ZIP, 56KB)

Contains 2,5,10,25,50,100,& 500 year Design Flows at Stream Nodes

(PDF, 3.5MB)

Subbasins (Zip, 819K)

Contains subbasin boundaries. Updated 3-3-06

(PDF, 3.2MB)

Tualatin river (ZIP, 99KB)

Created from Metro RLIS data

(PDF, 3.5MB)

Tualatin watershed (ZIP, 72KB)

Mask of the Tualatin Watershed

(PDF, 3.5MB)

Rapid stream assessment data collection sites (ZIP, 18KB)

Locations of sites where data was collected in 2000 - 2001.

(PDF, 255KB)

Rapid stream assement datatable (ZIP, 120KB)

Contains the data collected throughout the Healthy Streams Plan study area in 2000 & 2001.

RSAT Spreadsheet (PDF, 255KB)

Fish surveys (ZIP, 7KB)

1999-2001 Fish survey sites and species data.

(PDF, 3.4MB)

Macroinvertebrate surveys (ZIP, 6KB)

2002 macroinvertebrate survey sites and species data. Locations of three sites added in the 2005 survey are also included.

(PDF, 1.4MB)

Culverts (ZIP, 131KB)

Contains data about each culvert field-surveyed in 2000 and 2001.

(PDF, 3.5MB)

Outfalls (ZIP, 24KB)

Contains data about each outfall observed in the field during 2000 and 2001.

(PDF, 3.4MB)

NPDES stormwater outfalls (ZIP, 7KB)

Contains data on 106 major outfallsthat were inventoried as part of the phase I NPDES permit application process in 1991-1993.

(PDF, 3.4MB)