| Show forty five tons of dynamite in one blast portsmouth N H july 22 hundreds of came here today to witness with th s people of this city and vicinity the culmination of an engineering gi project which has been under way for the last thra years and which haa attracted the attention attea tion of the experts nth in this country and abroad it was he removal of hendersons Hender ledger some three acres in extent from river bed by exploding simultaneously about charges of dynamite at least 45 tons in the rock beneath the water J the hour scheduled for the dl of dynamite was 4 p m it was arranged that by the removing of a switch at a safe distance from the ledge sparks should be sent into contact with the dynamite the explosion resulting was expected to shatter the masis 61 rock and thereby to iden and deepen the waterway to the big dry dock recently complete ed by the government at the united states navy yard on Sc aveys island the contract price of the undertaking was the expense was covered by the government in connection with the bill authorizing the construction of the big dry dock at the navy yard it is understood that the charge of 45 tons of dynamite is he largest ever exploded at one time in this country hendersons point is a solid ledge of horseshoe shape feet wide at base and jutting out into the river about feet around it whirl innumerable currents and a lido which has been the dread cfall marinero mariners ma the swift naters hae worna channel 90 feet deep in the solid rock around the end of th e point but the force of the cros currents has been so great that tor years it has been a menace especially ally lo 10 ali development of the navy yard with the establishment of tho great dry dock its removal was imperative its destruction will give an approach 1000 feet wide and of a depth of wafer ample for the greatest ships in the world to pass to portsmouth and the navy yard |
