Ripple Rock (before 1958)

URI: https://gptkb.org/entity/Ripple_Rock_(before_1958)
GPTKB entity
Statements (32)
Predicate Object
gptkbp:instanceOf gptkb: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
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
https://www.w3.org/2000/01/rdf-schema#label Ripple Rock (before 1958)