Page:John Nolen--New ideals in the planning of cities.djvu/69

CITIES. TOWNS AND VlLLAGES impossible to project piers at right angles to the shore whenever it is deemed necessary to increase the available berthing space in front of a given length of water frontage. Vessels must then tie against a bulkhead structure built parallel with the waterway. Three or four times the length of the largest vessel which will probably navigate a given waterway has been stated as the most advantageous width, whenever vessels must turn and enter slips built at right angles to the shore. Where vessels tie up against bulkheads built parallel with the shore line, less width is necessary. In this case allowance must be made for the vessel to tie