Show pipe arch bridge an engineering curiosity said to bo be unique to this country and tol to have only one parallel in europe Is the pipe larch arch bridge over the Sud bars river which carries water supply the span is eighty feet anil and the steel pipe seven and one half feet in diameter rises five and one half feet above the horizontal at the center the bie pressure on the abutments when the pipe la gilld nith vi ath water la is groat and Is resisted rei Tes alsted isted by a mass of concrete forty feet thick behind each abutment across the curved tops runs a hand railed fora foot bridge the steel of the pipe in the arched portion Is five ei libba of an inch la in thickness |