Case Study - USA Oso Landslide

Two contemporary contrasting case studies for mass movement hazards

what is the gdp per capita pp of oso (NOT the usa)

$23,700, 23,700$, 23,700 dollars, $23700, 23700$, 23700 dollars

what is the population of oso

200

what caused erosion at the base of an unstable hill

melting glacier ice

how did pore pressure/soil saturation change

increased, increase

when did the mudslide happen (day, month, year)

22/3/14

what time of day did the mudslide happen

late morning

how much land was covered (square miles)

1, 1 square mile, 1 mile squared

the food bank of a small neighbouring town increased from serving ... to ... (...-...)

500-1800, 500-1,800

how did destruction of houses and blocking of roads affect families

isolated, isolated them, separated, separated them

how many deaths were there

43

how many people were seriously injured

12

how many homes were destroyed

40

what percentage of oso's residents are people over 65 living alone

15

what percentage of oso's houses are family households

38

how much financial damage was done (USD)

60M

how much did washington state provide to residents to cover damages (USD)

50M

what did experts advise against doing

building a stabilising wall

how did the state consider incentivising people to leave the are (preparation for disaster)

offer to buy their houses

what human activity weakened the area

logging

how did people driving cars near the mudslide react (3 things)

stopped, evacuated cars, evacuated, helped eachother, helped each other

how many first responders were dispatched

100

what was done during highway reconstruction

raised highway, elevated highway, raised road, elevated road