Issue 4 and Volume 1895 18.

ALLEGHENY, PA., NEW WATER WORKS. The sub-committee on the new water works system of Allegheny City, Pa., have adopted a plan of which an infiltration gallery is the leading feature, though some would prefer to call it clarified. The influent pipes do not receive the water direct from the river. The intake proper is an infiltration gallery situated 200feet out in the river and about nine and one-half feet below the bed, with which it is parallel. The gallery will be thirty-two feet wide and 2,500 to 3,000 feet in length, composed of slats four inches wide and four inches apart, attached to four fnch posts. The ends will lie edge shaped, the angle filled in with selected sand and gravel, water tight on the top, the bottom simply braced. From the middle portion of this gallery the four influent pipes will run out to the pumping station on the…

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