Using GIS and Scale Linking to Set Priorities for Culvert Replacements in the Tualatin Basin, Oregon

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Presenter: Jill Ory
Length: 15 min 54 s

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       Topics:

• Why Set Priorities
• ...Over 1200 Culverts in Basin
• Data Collected for Each Culvert
• Could- Should- Can
• Where We Are
• Glacial Dams and the Bretz Floods
• Historical Land Surveys- 1850
• Current Land Use
• Objectives of Watershed Analysis and Culvert Priority Setting
• Native Cutthroat Trout
• Some of the Best Habitat in our Jurisdiction
• Creeks in Area with Less Impervious Cover
• Chicken and Cedar Creek Habitat Examples
• Tualatin Basin Substrate
• Good Tree Canopy Cover
• ...Compared to the Whole Basin
• Large Wood and Debris Jams
• Compared to the Whole...
• Zooming In...
• Basin Supports Some of Best Trout and Steelhead Habitat
• Many Culverts that are Barriers
• Zooming In to Evaluate Culverts
• Limiting Substrate is Clay Substrate
• Screen Out Short Length Culverts
• Further Examine and Rank Remaining Culverts
• In Conclusion

These presentations were produced by Michael J. Furniss and Jeff Guntle, of the US Forest Service, PNW and PSW Research Stations.
US Forest Service, Pacific Northwest Research Station, Pacific Southwest Research Station, Stream Systems Technology Center