Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 298
6 per cent for 560 ft. to the shore shaft and beyond this an ascending grade 1 ft. in 1,000 to the down take shaft, thereby affording drainage from both directions to the shore shaft. The tunnel is straight with the exception of a curve with an 80 ft. rail, located at the extreme west end and near… … Fig'. 1. Profile of Intake Tunnel. From the shore shaft a connecting tunnel 4 ft. in diameter was driven to the present pump pit shaft through which the main tun- nel can be drained in order to make any necessary repairs. The main tunnel, circular in sections, was driven with a diameter of 10 feet.…
Engineering
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