CBRM Floodwater Containment and Mitigation Project 

The purpose of this interview is to objectively summarize the Phase 1 report submitted to the CBRM entitled Wash Brook Floodwater Containment and Intensity Mitigation Project. Lead Engineer for the Project, Alexander Wilson of CBCL answers questions regarding scope and capacity of the project. 

  • Intro/Question 1

    What are the goals of the project, and boundaries of the watershed?

  • Question 2

    What is the Flood Risk  Investment Program for Nova Scotia? 

  • Question 3

    How do engineers measure how much water moves though the watershed and infrastructure? 

  • Question 4

    Did the study consider seasonal impacts such as snow melt, frozen ground, etc? 

  • Question 5

    How do native soil and ecology conditions in the watershed impact flood reduction initiatives?

  • Question 6

    How does climate change impact flooding in the Washbrook watershed?

  • Question 7

    Can you explain what 'return frequency storm' classifications mean?

  • Question 8 

    Why were 1 in 20 and 1 and 100 return period of storm used in this study?

  • Question 9

    What was the October 'Thanksgiving Storm' classified as on the 'return period storm scale'?

  • Question 10

    What were the causes of the 'Thanksgiving Storm'?

  • Question 11

    How much of the surface flooding can be attributed to run off from impermeable surfaces? 

  • Question 12

    Which areas of the Washbrook were determined to be the most vulnerable to flooding? 

  • Question 13 

    What are the differences between structural and non-structural floodwater mitigation? 

  • Question 14

    What structural mitigation measures did you determine to be the most effective ? 

  • Question 15

    Explain the levels of effectiveness compared to stakeholder acceptance of options 5A and 5B. 

  • Questions 16

    Will the Baille Ard trail system still be accessible to the public if Pond 5 is constructed?

  • Question 17

    In general, how to berms operate and are they difficult to maintain?

  • Question 18

    Could measures such as bioswales, rain gardens, detention tanks and tress help in the Washbrook?

  • Question 19 

    What non-structural flood risk mitigation measures were recommended for CBRM? 

  • Question 20

    What are some things home owners can do to flood proof their homes? 

  • Question 21

    What will Phase 2 of the project consist of?  

  • Question 22

    What approvals and assessments are required prior to construction? 

  • Question 23

    How does natural water retention from mature forest compare to man-made structures? 

  • Question 24

    Will the Washbrook watershed  flood again? 

We would like to acknowledge that we are in Mi’kma’ki, the ancestral and unceded territory of the Mi’kmaq People. This territory is covered by the “Treaties of Peace and Friendship” which Mi’kmaq Wəlastəkwiyik (Maliseet), and Passamaquoddy Peoples first signed with the British Crown in 1726. 

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