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Bridges Predicted to be at High Flood Risk

Bridges Predicted to be at High Flood Risk. Benjamin Davis Michael Kazalis. Factors to Consider. Streams and Road Intersections Soil Drainage Class Land Cover Predicated Precipitation Change Flood Zones Bridges at Risk Bridge Condition. Soil Drainage Class.

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Bridges Predicted to be at High Flood Risk

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  1. Bridges Predicted to be at High Flood Risk Benjamin Davis Michael Kazalis

  2. Factors to Consider • Streams and Road Intersections • Soil Drainage Class • Land Cover • Predicated Precipitation Change • Flood Zones • Bridges at Risk • Bridge Condition

  3. Soil Drainage Class • Well drained areas assigned a value of 1 • Moderately well drained areas assigned a value of 2 • Poorly drained areas assigned a value of 3

  4. Land Cover • Forests and shrubs get a value of 1 • Wetlands and open water get a value of 2 • Developed lands and cultivated crops get a value of 3

  5. Predicted Precipitation • Looked at the projected change in 50 years • Precipitation is projected to increase everywhere in Oswego County in 50 years • Split these increase into three groups • Low increase was given 1 • Medium increase was given 2 • Large increase was given 3

  6. Combining Factors • Soil Drainage Class • Land Cover • Road and Stream Intersection • Predicted Precipitation change

  7. Flood Zones • Low Risk (X, X500) - given a 1 • Medium Risk (VE) - given a 2 • High Risk (A, ANE, ANI, AO) – given a 3

  8. Consider Bridges • With all of the factors considered there are still a significant amount of high risk flood areas • We decided to consider only bridges at a flood risk

  9. Bridge Condition • The bridge file contains the condition of each bridge as a value from 253 – 999, with 999 being the best condition. • Bridges with values of 801 – 999 were assigned minimal • Bridges with values of 501 – 800 were assigned moderate • Bridges with values of 376 – 500 were assigned high • Bridges with values of 253 – 375 were assigned critical

  10. Questions?

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