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Risk Assessment and   Monitoring and Evaluation

Risk Assessment and   Monitoring and Evaluation. Consideration of Design and Construction of Culverts for Fish Passage: A Risk Assessment Approach.

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Risk Assessment and   Monitoring and Evaluation

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  1. Risk Assessmentand  Monitoring and Evaluation

  2. Consideration of Design and Construction of Culverts for Fish Passage: A Risk Assessment Approach

  3. As previously mentioned, TRANS’ risk is assessed in relation to activities regarding linear development e.g. culverts, bridges and highways. Therefore a risk assessment approach is being taken for fish passage.Note: A separate risk assessment is being developed for habitat impacts.

  4. In nearly all cases TRANS’ design parameters do not require mitigate or offsetting approaches since TRANS culverts are designed to pass fish. Only specific cases (e.g. steeper than average slopes etc.) are additional mitigative/offset measures required.

  5. Table 1.What can be addressed by applying the correct culvert design criteria for streams <1% slope

  6. Table 1. (First criteria)

  7. Table 1 – expanded Column 1

  8. Column 2

  9. Column 3

  10. If these and other conditions are met (velocity criteria, slope etc.) then the culvert may be installed without referral to DFO. Remember, all conditions to protect the environment must be followed.

  11. Monitoring(Performance Evaluation)

  12. At this point there has been some monitoring completed at certain culvert sites. However, this has not been a standard approach and some of the information is anecdotal.

  13. Fish consistently out perform previous expectations based on laboratory studies Fish have senses adapted to aquatic environment Dependent on species and motivation, fish move through a variety of flow conditions We do know that:

  14. Fish will move through culverts

  15. Standards: TRANS will be completing two ‘intensities’ of monitoring regarding fish passage. For fairly similar projects (e.g. Northern Pike in the Red Deer fisheries management area) monitoring studies on a representative number (~10 to 15%) of culverts would be fairly simple.

  16. ‘Simple’ usually involves tagging or marking fish in such a manner to see if these fish move through the culverts. Visible Implant Elastomer (VIE)

  17. More intensive types of monitoring will occur only at specific sites (~ 5%). It will include monitoring parameters such as velocities, flows, and other data to obtain a more detailed ‘picture’ of the interacting dynamics.

  18. Interpreting and explaining the similarities between culvert design and fish passage principles is required for an integrated approach that will result in culvert structures that are both cost effective and consistent with fisheries management objectives.

  19. Forthcoming to address fish passage: • Standards and guidelines for fish and fish habitat assessments • Risk assessment framework • Guidelines for fish passage design • Guidelines for when to apply to DFO • Guidelines for regulatory applications

  20. The End

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