U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


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Hydraulic Engineering

slide 20

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Oregon POA as described below

Box 1: Scour Assessment (Item 113) shows the structure is scour critical?

Box 2: Is the foundation material highly erodible?

Box 3: Have scour countermeasures been installed?

Box 4 Bent/Pier soundings during high water events.
Maintenance personnel check during high water events
Diver inspection of bent located in non-wadable water after high water events or at least annually
Check and update the x-channel profile at least every 2 years

Box 5: Is there evidence of on-site localized scour?

Box 6: Maintenance personnel check during high water events
Diver inspections annually Check and update the x-channel profile at least every 4 years

Box 7: The bridge has a history of drift accumulation

Box 8: Maintenance personnel check during high water events
Diver inspection of bents located in non-wadable water at least every 2 years
Check and update the x-channel profile at least every 4 years


Box 1 to Box 2

Box 2 to Box 3, if N to Box 5

Box 3 to Box 4, if N to Box 5

Box 5 if Y to Box 6, if N to Box 7

Box 7 if Y to Box 6, if N to Box 8

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Updated: 02/05/2015
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000