No. 40] 



GEOLOGY OF SHEPAUG TUNNEL 



13 



the north end of Bantam Lake were made during the construction 

 of the tunnel and will be mentioned at the end of this report. 



The region is drained by three streams (Fig. 2). The Bantam 

 River has the largest watershed. It includes Bantam Lake and 

 cuts through the center of the map and joins the Shepaug River 

 near the southwest corner. The westernmost watershed and the 

 next largest is drained by the Shepaug River, while the smallest 

 one of the three is occupied by the West Branch of the Naugatuck 

 along the eastern margin of the area. The Bantam River enters 

 the Shepaug and together they are tributary to the Housatonic 



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Fig. 2. — Map showing watersheds in area discussed. — . — . — . — . — , 



Watersheds. AA, Tunnel line. , Line of diamond drill 



holes (see Fig. 3). 



further west. The West Branch of the Naugatuck drains into the 

 main Naugatuck which itself is tributary to the Housatonic some 

 miles south of where the Shepaug enters that stream. 



There are a number of small tributaries, ponds, and marshes 

 included within these drainage systems, but Mount Tom Pond, the 

 largest body of water next to Bantam Lake, though it lies within 

 the area drained by the Bantam River, has no visible inlet or 

 outlet and, on the surface, at any rate, belongs to none of them. 



History of the Project 

 By R. A. Cairns, City Engineer, Waterhury 



The Shepaug Tunnel became a necessary adjunct of the water 

 supply system of the City of Waterbury as a natural step in a 

 development resulting from a long series of happenings beginning 



