The gate valve being closed, the water cannot be drawn below the 9-foot
level in tank, which leaves about 35,000 gallons in store for fire
protection, and is at once available by opening the gate valve referred
to. The tank rests on ground about 5 feet above the main streets, which
gives a head of 57 feet when the tank is half full. The distance from
tank to the farthest hydrant being so short, they get the pressure due
to this head at the hydrant, when playing 2-inch, or 1-1/8-inch streams,
with short lines of 2½-inch hose; this gives fair fire streams for a
town with few if any buildings over two stories high. It is estimated
that this mill is pumping from 30,000 to 38,000 gallons on an average
every twenty-four hours. There is an automatic device attached to this
mill, which stops it when the tank is full, but as soon as the water in
the tank is lowered, it goes to pumping again. The cost of these works
complete to the city was a trifle over $6,000.

In November last a wind mill 18 feet in diameter was erected over a coal
mine at Richmond, in this State. The conditions were as follows:

The mine produces 11,000 gallons of water every twenty-four hours. The
sump holds 11,000 gallons. Two entries that can be dammed up give a
storage of 16,500 gallons, making a total storage capacity of 27,500
gallons. It takes sixty hours for the mine to produce this quantity of
water, which allows for days that the wind does not blow. The average
elevation that the water has to be raised is 65 feet, measuring from
center of sump to point of delivery. A record of ninety days shows that
this mill has kept the mine free from water with the exception of 6,000
gallons, which was raised in the boxes that the coal is raised in. The
location is not good for a wind mill, as it stands in a narrow ravine or
valley a short distance from its mouth, which terminates at the bottom