Sand bars keep filling up the mouths of these channels, necessitating frequent dredging and extension of the breakwaters, work undertaken by the Federal government, which also maintains a most comprehensive and completeystem of aids to navigation, including lighthouses and lightships, fog alarms, gas and other buoys, life-saving, storm signal and weather report stations. [Please select]
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New houses, promenades, iron piers, breakwaters, lakes, towers--wonderful I extraordinary. [Please select]
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METHODS AND COST OF HEAVY CONCRETE WORK IN FORTIFICATIONS, LOCKS, DAMS, BREAKWATERS AND PIERS. [Please select]
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CHAPTER XII HARBOURS, BREAKWATERS, AND SHIPYARDS 1. [Please select]
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They were nearing a point where the line of _murazzi_ they had been following--low breakwaters of great strength--swept away from them outward and eastward towards a distant opening. [Please select]
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--METHODS AND COST OF HEAVY CONCRETE WORK IN FORTIFICATIONS, LOCKS, DAMS, BREAKWATERS AND PIERS 184 Introduction--Fortification Work: Gun Emplacement, Staten Island, N. [Please select]
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