Proceedings of tite' Polytecenic Association. 969 



each end of the pier, under tire guard lock?, each side l^eing twenty-twa 

 to twentj-three feet wide and eighteen feet higli in tlie clear, with five 

 feet sidewalks and a paved carriage-way. For convenience of con- 

 struction and use, the line^of this tunnel at each side of the locks will 

 zigzag in rising on its grade (of about three and one-half feet per 

 100), while a side footway stair will provide for pedestrians oo as tc 

 avoid any loss of distance in walking over. 



In connection with the tunnel, at the first return near the guard 

 lock side walls, commodious engine and boiler rooms will be built to^ 

 provide the power required for occasional drainage and pumping, for 

 pneumatic tubes, for working the gate and other capstans and the 

 swing bridge, for tunnel ventilation and other purfeoses found" 

 desirable. 



Between the side streets and the central avenue, rows of first class 

 warehouses, five stories high, will be built, varying from 140 to 165 

 feet in depth and fifty feet ^vide, which can be connected* o-ver the 

 central avenue, and will be seventy in number on the location esti'- 

 mated. . As a natural sequence of tliis construction wing pica's wall 

 probably be built for commercial uses, but are not ineludjed in the 

 present plan. 



The object of this general plan is, firstly, to stop the present tidal 

 currents of the East river, witliout impeding ocean scale of passage ; 

 secondly, to furnish a permanent and uninterrupted ti-ansit between 

 New York and Brooklyn, for all classes of travel ; thirdly, to facili- 

 tate coast and ocean commercial storage, transhipment, anchorage, 

 repair, &c., and all its details are adapted to the proper development 

 of these principles. 



Location". 



The location selected for the initial development of this plan is 

 that part of the East river immediately north of Corlear's Hook, on 

 a center line, coimecting Delancey street, New York, with South 

 Sixth street, Brooklyn, E. D., which is near the abrupt turn made to 

 the M'est by the river. 



The reasons which influenced tliis location may be thus stated, viz. : 

 1st. The gfeat majority of ocean vessels which arrive at or leave 

 New York do so through New York bay, and except for purposes of 

 construction or repair, large vessels, except sound steamers, are not 

 much seen north of this point. The navy yard and government 

 ships are below it, and lierein an obiection is obviated which might 

 obtain at Washington against such a pier at any point nearer Fulton 



