4 -/. F. Kemj) — The Storm King Crossing 



passed each other and that solid granite was present at the 

 depth of 955 ft. A depth of 1100 ft. was therefore selected 

 for the crossing of the great siphon ; the shafts were- pushed 

 with all speed ; the headings were turned and on Jan. 24, 1912, 

 the last round of holes was fired, making the connection 

 complete. The first man to pass through the tunnel from 



Fig. 3. 



Fig. 3. Topographic map showing the approaches of the aqueduct to the 

 Storm King Crossing. Below and above the 400 contour, there is tun- 

 neling. 



shore to shore, as soon as the powder-smoke had cleared away, 

 was the Mayor of New York City. 



The records afforded hy the drills and the tunnel therefore 

 demonstrated that the bed-rock of the Hudson lies somewhere 

 between 768 ft. and 955 ft. below the surface. An estimate 

 based on the profiles of the shallower holes nearer the shore 

 and the assumed U-shaped profile of a glaciated valley, leads 



