Plate 47(a) 



Storm King Mt. 



Diagrammatic cross section of the Hudson river at the Storm King crossing, 

 looking south, showing the completed aqueduct tunnel, the exploratory borings 

 made in the river and the inclined diamond drill holes made from the two 

 Avorking shafts 



Plate 47(b) 



A diamond drill set up in a room cut out of granite work in the shaft at 

 Storm King Crossing, at a depth of over 200 feet, drilling the inclined holes to 

 explore the ground beneath the river 



