Show largest concrete bridge the largest concrete bridge in the arld Ur ld a huge structure has attracted worldwide world wide attention among engirt engineers aers Is just nearing completion at washington connecting connecticut boulevard one of most fashionable drives over rock creek valley this wonderful bridge Is already regarded as a celebrated example of the utility of conchete conci ete constructed of molded concrete mocks and monolithic conry it ft Is fa dependent upon itself for support having no steel stee framing for says popular meehan bics ics at its highest point the bridge is feet above the bed of the ravine and its total length with ap preaches hes 1400 feet congress appropriated for construction ot ol the bridge proper |