Roads Riparian Restoration: Low-water Crossings

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Presenter: Terry Warhol
Length: 15 min 23 s

View: Part 1 | Part 2

       Topics:

       Part 1

• Low Water Crossings
• The Three General Types
• Vented Fords
• Example of Vented Ford with 4 Culverts
• Another Example using Gabian Baskets
• Multiple 24 inch Culverts
• Ford Crossing Needs to be Low Spot
• Concrete Pipes Too Small
• Open Concrete Box Culvert Replacement
• Example of a Failed Vented Ford
• Same Structure Looking Upstream
• Replacement Metal Grated Top Ford
• Vented Concrete Box
• Looking Upstream at Concrete Box
• Another Good Installation Example
• Crossing that Provides for Traffic in most Flow Regimes
• Overtopping by Flooding and Showing Excellent Ford Design
• Poorly Located Fish Passage Structure
• After the Fish Passage Structure Removed
• Headcutting Occurs from the Downstream Up
• High Gradient Channel Ford
• Trash Rack View
• Unvented Fords
• Heavy Rip Rap Ford

       Part 2

• Large Rip Rap Unvented Ford
• Campground Unvented Ford
• No Problem for Passenger Car Traffic
• Beaver Predicament
• Jersey Barriers in the Southwest
• Rip Rap Placed as Erosion Protection
• Paved Surface through the Ford
• Overtopping
• Extreme Example of Low Water Ford
• Structure to Provide Passage for Fish
• Two I Beams
• Polasky Width
• Erosion Protection
• Rip Rap for Erosion Protection
• Low Water Bridges
• Grated Top Box Culvert
• Low Water Bridge After Overtopping
• System of Concrete Piers
• Cattle Guard Deck
• Dont Drive Through Unknown Depth
• Some Points to Remember

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