MT ST Helens

Mt ST Helens case study

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to reduce the risk. pre eruption

  • monitoring
  • blocked off roads
  • restricted access

After the eruption. recovery

  • water in Spirit lake was found to contain a disease, so stopped use and monitored water
  • risk of mudflows and flood, so they pumped water away from Spirit lake while a outlet tunnel was created to maintain the Lake at a safe level
  • also to decrease risk of mudflows and flood, sediment dams created on Toutle River, however soon river filled with sediment so river had to be dredged
  • Many Lakes restocked with fish, to restore popular recreational fisheries
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Good perceptions

  • popular attraction, St Helens monument made. attracts tourist to the area
  • recreation opportunities
  • one business took some of the huge amounts of ash produced to make "genuine Mt St Helens ash trays"
  • digger companies etc. get money to dig out ash.
  • builders get work to rebuild houses, roads, bridges

Bad Perceptions

  • destroyed around 250 homes, insurance companies, huge economic and social impact
  • killed 61 people
  • transport such as roads near the area were destroyed.
  • tribes had to leave their home and traditional way of life
  • jobs lost, loggers worked there can't anymore due to the 156 acres of trees being blown over and burnt
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