Why is the Grover Beach landing station

Why is the Grover Beach landing station located in a tsunami inundation zone? (Re: http://www.conservation.ca.gov/cgs/geologic_hazards/Tsunami/Inundation_Maps/SanLuisObispo/Documents/Tsunami_Inundation_Oceano_Quad_SLO.pdf)
This is a comment on "Grover Beach Cable Landing Station"

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