OPEN-CUT TUNNELING METHODS 195 



will come to the same level, and continue side by side thereafter 

 except at the points which will be noted as the description- 

 proceeds. Proceeding from the loop, the four-track line passes, 

 under Center and Elm Streets. It will continue under Lafay- 

 ette Place, across Astor Place and private property between 

 Astor Place and Ninth St. to Fourth Ave. The road will then 

 pass under Fourth and Park avenues until 42d St. is reached. 

 At this point the line turns west along 42d St., which it 

 follows to Broadway. It turns northward again under Broad- 

 way to the boulevard, crossing the Circle at 59th St. The road 

 will then follow the boulevard until 97th St. is reached, where 

 the four-track line is separated into two double-track lines. 



At a suitable point north of 96th St. the outside tracks will 

 rise so as to permit the inside tracks, on reaching a point near 

 103d St., to curve to the right, passing under the north-bound 

 track, and to continue thence across and under private property 

 to 104th St From there the two-track tunnel will go under 

 104th St and Central Park to 110th St., near Lenox Ave. ; 

 thence under Lenox Ave. to a point near 142d St. ; thence 

 across and under private property and the intervening streets, 

 to the Harlem River. The road will pass under the Harlem 

 River and across and under private property to 149th St., 

 which street it will follow to Third Ave., and will then pass 

 under Westchester Ave., where at a convenient point the tracks 

 will emerge from the tunnel, and be carried on a viaduct along 

 and over Westchester Ave., Southern Boulevard, and Boston 

 Road to Bronx Park. This portion of the line, from 96th St. 

 t> Ilronx Park, will IKJ known as the East Side Line. 



From the northern side of 96th St the outside tracks will 

 rise, and after crossing over the inside tracks they will be 

 brought together on a location under the center line of tin- 

 street and proceed along under the boulevard to a point between 

 1 J<1 and 123d streets. At this point the tracks will com- 

 mence to emerge from the tunnel, and l>e carried on a viaduct 

 along and over the boulevard at a point between 134th and 



