Floating Tunnel for Long Water Crossings

The rapidly advancing requirements of vehicular transportation, caused by increased population and industry, occasionally necessitate an engineering attempt to span water barriers which formerly were considered either impossible to cross or economically unsound. The purpose of this paper is to present a preliminary study of such a problem. The solutions suggested and presented are by no means to be considered final in detail. It seems to the writer, however, that they do present the only possible method of constructing a vehicular bridge between the points indicated. Briefly stated, the problem presented to the writer, by the Director of Highways of the State of Washington, was to make a study of possible methods, if any, of constructing a permanent highway structure across Puget Sound between Seattle, Wash., on the east and the mainland on the west shore.