e pumping station by
replacing about two miles of the old 16-in., wrought-iron, riveted pipe
with 24-in. riveted steel pipe.

3.--Increasing the capacity of the pumping station by the installation
of a 4,500,000-gal. pumping engine of the close-connected,
cross-compound, Corliss, crank-and-fly-wheel type.

4.--The construction of a 20,000,000-gal. concrete-lined distributing
reservoir in the city.

5.--The entire remodeling of the distributing system, necessitating the
laying of about 1/2 mile each of 18-in. and 27-in. pipe, and about 1
mile of 24-in. riveted steel pipe; also about 3,000 tons of cast-iron
pipe, varying in size from 4 to 12 in.

6.--The provision for a high-level service by means of an elevated tank
of approximately 100,000 gal. capacity, water being supplied to the tank
by two electrically-driven triplex pumps, each having a capacity of
100,000 gal. per 24 hours, against a dynamic head of 150 ft., and
arranged to start and stop automatically with a variation of 3 ft. in
the elevation of the water in the tank. These pumps are located about
one mile from the tower, and are controlled by a float-operated
auto-start, in the base of the tower.

A description of the elevated tank, which is novel in design, with the
reasons for adopting the type of structure used, the method of
construction, and the detailed cost, form the basis of this paper.

The tower is on the top of the highest hill in the city, in the heart of
the most exclusive residential district, beautiful homes clustering
about its base. The necessity for architectural treatment of the
structure is thus seen to be of prime importance. In fact, the
opposition of the local residents to the ordinary type of elevated tank,
that is, latticed columns supporting a tank with a hemispherical bottom
and a conical roof, rendered its use impossible, although tenders were
invited on such a structure.

It is believed that under the conditions of location, three types of
structure should be considered: First, an all-steel structure, the
ornamentation being produced by casing in with brick or concrete;
second, a brick-and-steel, or a concrete-and-steel, structure, such as
the one actually erected; third, a typical reinforced concrete
structure.

Considering only that portion below the tank, the amount of material
required to case in a structure of the first type would be substantially
the same as that used to support the tank in a structure of the second