Artesian Water for Minneapolis. — Winchell. 267 
ervoir would be 18,919,196,078,220. The upper basin spoken 
of, which lies at a depth of about 200 feet, extends approximate- 
ly north and south from the vicinity of southern Isanti county 
to the central part of Dakota county on the south, and from the 
west in the central part of Hennepin county eastward to the 
central part of Washington county, embracing an area of 1,296 
square miles. The sandstone in which this water is contained 
is about 190 feet thick, having an average thickness perhaps of 
150 feet. Supposing it to be occupied by water in the same 
ratio as the other sandstone mentioned, the amount of water 
contained in this reservoir, would aggregate 4,054,110,793,200 
gallons. In order to reach the lower reservoir by a deep 
well in the city it would be necessary to drill about 400 feet, 
and in order to reach the bottom of the smaller reservoir it 
would be necessary to drill about 200 feet. 
