Aqueduct Bridge

Bridge carrying water pipes, or aqueduct over a stream or valley. The High Bridge, carrying the old Croton aqueduct over the Harlem River at New York, is a beautiful masonry structure having 15 arches, 8 of which are of 60 feet span. A suspension bridge at Pittsburg, Pa., has 7 spans, each of 160 feet, the cables carrying the aqueduct being 7 inches in diameter. The Wi a hick on bridge at Philadelphia has 4 spans of 166 feet, the water pa ing through the horizontal upper chords of the tru es, which are 20 inches in diameter. The Rock Creek arch at Washington, D. C., is formed of cast-iron pipes 48 inches in diameter, through which the water of the Potomac aqueduct flows. The Vanne aque IMG:content-0216.png:[blocks in formation] IMG:content-0217.jpg:[graphic] IMG:content-0218.png:[blocks in formation]