70 



MAXUAL OF GAKDEXING 



intersections. This arrangement causes most of the surface 

 water from both streets to run past the crossings, making it 

 necessary to depress the pavement, so that one must step down 



and up in going 

 from one side of 

 a street to the 

 other, or else a 

 passageway for 

 the water must 

 be made through 

 the crossing. It 

 may be said that 

 a step down 

 to the pavement 

 and up again to 

 the sidewalk at 

 the street inter- 

 sections is of no 

 consequence, but 

 it is really more 

 elegant and sat- 

 isfactor}" to have 

 the walk practi- 

 cally continuous 

 : ■\: ; I i (Fig. 68). With 



,ii I the catch-basin 



' ^ i^^' : \ 'j: I at the corner, 

 ; X " ■ \t t the stoppage of 

 •C: }^ \ If ^ the inlet, or a 



great fall of rain. 



? \ j ! , sometimes cov 



=^ 1 ers the crossing 



I with water, so 



that one must 



