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Enhancing Wildlife Safety: Effective Underpasses and Their Specifications

This guide explores the effectiveness of wildlife underpasses, achieving an average success rate of 87% when combined with large-mammal fencing. We discuss various types of crossing structures, dimensions, and the impact of surrounding terrain on implementation. Recommendations include raising roadways to minimize excavation, ensuring visibility for animals, and employing sound-attenuating measures. Additionally, it covers cost considerations and maintenance strategies to ensure long-term effectiveness in wildlife preservation.

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Enhancing Wildlife Safety: Effective Underpasses and Their Specifications

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Presentation Transcript

  1. Wildlife Underpasses • Effectiveness • Specifications • Surrounding Terrain • Implementation • Cost • Maintenance

  2. Effectiveness 87 percent (average) when used in combination with large-mammal fencing

  3. Specifications . Dimensions of the three different types of crossing structures. 4

  4. 4

  5. Surrounding Terrain Roadway is relatively higher than the surrounding terrain • The roadbed does not have to be : • raised • the approaches lowered • reduces the overall excavation

  6. It is advisable: To allow animals to see to the other side Avoid flooding of underpasses and the associated soil erosion

  7. Wildlife fencingalongside the road corridor typically ties into the wing walls of the underpass or the structure itself ( above for smaller culverts) Noise and light disturbancefrom the road need to be minimized (e.g., employing sound-attenuating walls above the entrances).

  8. Impementation

  9. At-Grade Animal “Sidewalks”

  10. At-Grade Animal “Sidewalks”

  11. Costs

  12. Costs

  13. Maintenance

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