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Ripple Rock (before 1958)
URI:
https://gptkb.org/entity/Ripple_Rock_(before_1958)
GPTKB entity
Statements (32)
Predicate
Object
gptkbp:instanceOf
underwater mountain
gptkbp:affectedWaterway
gptkb:Discovery_Passage
gptkbp:cause
numerous shipwrecks
loss of life
gptkbp:explosionAmount
1,375 tons of Nitramex 2H explosives
gptkbp:explosionDate
April 5, 1958
gptkbp:explosionPurpose
improve marine safety
gptkbp:explosionSignificance
one of the largest non-nuclear explosions in history
gptkbp:explosionType
controlled demolition
gptkbp:featureType
submerged twin-peak mountain
gptkbp:firstSurveyedYear
1792
https://www.w3.org/2000/01/rdf-schema#label
Ripple Rock (before 1958)
gptkbp:knownFor
strong tidal currents
hazardous navigation
gptkbp:locatedIn
gptkb:British_Columbia
gptkb:Canada
gptkb:Seymour_Narrows
gptkbp:maximumDepth
2.7 meters at low tide (before 1958)
gptkbp:notableEvent
destroyed by explosion in 1958
gptkbp:numberOfLocations
2
gptkbp:peakNames
gptkb:North_Peak
gptkb:South_Peak
gptkbp:removalProjectBy
gptkb:Government_of_India
gptkbp:removalProjectEnd
1958
gptkbp:removalProjectStart
1942
gptkbp:removalTunnelLength
500 meters (approximate)
gptkbp:removalTunnelOrigin
gptkb:Maud_Island
gptkbp:removes
tunneling from Maud Island
gptkbp:riskFactor
shipping
gptkbp:surveyedBy
gptkb:Captain_George_Vancouver
gptkbp:bfsParent
gptkb:Seymour_Narrows
gptkbp:bfsLayer
8