The Project Gutenberg EBook of Transactions of the American Society of
Civil Engineers, vol. LXXII, June, 1911, by E. D. Hardy

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Title: Transactions of the American Society of Civil Engineers, vol. LXXII, June, 1911
Water Purification Plant, Washington, D. C. Results of Operation. Paper No. 1191.

Author: E. D. Hardy

Release Date: December 27, 2008 [EBook #27632]

Language: English

Character set encoding: ASCII

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AMERICAN SOCIETY OF CIVIL ENGINEERS
INSTITUTED 1852

TRANSACTIONS

Paper No. 1191

WATER PURIFICATION PLANT, WASHINGTON, D. C.
RESULTS OF OPERATION.[1]

~By E. D. Hardy, M. Am. Soc. C. E.~

~With Discussion by Messrs. Allen Hazen, George A. Johnson,
Morris Knowles, George C. Whipple, F. F. Longley, and E. D. Hardy.~

The Washington filtration plant has already been fully described.[2]
At the time that paper was written (November, 1906), the filtration
plant had been in operation for only about 1 year. It has now been
in continuous operation for 5 years, and many data on the cost,
efficiency, and methods of operation, have accumulated in the
various records and books which have been kept. It is thought that a
brief review of the results, and a summary of the records in tabular
form, will be of interest to the members of the Society, and it is
also hoped that the discussion of this paper will bring out the
comparative results of operation of other filter plants. As a matter
of convenience, the following general description of the plant is
given.

_Description of the Filtration Plant._--The Washington filtration
plant was completed and put in operation in October, 1905. It
consists of a pumping station for raising the water from the
McMillan Park Reservoir to the filter beds; 29 filters of the slow
sand type, having an effective area of 1 acre each; the
filtered-water reservoir, having a capacity of about 15,000,000
gal.; and the necessary piping and