river railroad bridge warren bridge built site railroad bridge original bridge completed opened august likely built bridge miles track connecticut known connecticut line leased reported improvement new foot long iron bridge line leased new_york dominating region new_york petitioned changes approval came july historic river railroad bridge constructed improved version previous bridge new foot long bridge integrated previous design elevated feet railroad bridge abandoned 1960s sold bridge added national_register_of_historic_places july bridge located wooden pedestrian bridge built atop railroad bridge crosses previous bridges according national_register_of_historic_places nomination bridge constructed early 1870s new_york details bridge largely unknown contradictory evidence exists placing construction bridge according marshall completed branch completed organized line completed line operated miles track connecticut known connecticut opened august line leased april company years january reported bridge yards earth moved replace high cubic yards masonry added preparation installation new bridge announced replacement howe installation new foot long iron bridge october line leased new_york years reported bridge completed new_york dominated region having acquiring dozen railroads company sought improve april company petitioned alterations changes approval changes came july second bridge rebuilt increase flood clearance load bearing capacity bridge integrated new bridge completed replacement river railroad bridge steel double intersection warren deck original granite stone supported previous bridge reported feet lower integrated rebuilt bridge chord span feet feet long feet deep chords typical box diagonal members deck open point bridge altered addition sewer pipe fate line continued serve local passenger freight trains decades flooding august destroyed critical bridge work lead closure 1960s years abandonment railroad sold connecticut abandoned railroad bridge span sealed tracks lifted bridge new wooden bridge allows transportation constructed prior new wooden bridge decks railroad bridge assisted national_register_of_historic_places nomination lists criteria criterion requires property contribution major pattern american history criterion concerns distinctive characteristics building architecture construction basis criterion major improvement engineering lines operation new_york bridge listed criterion representative example typical medium length railroad bridge early 20th century bridge added national_register_of_historic_places july
Blackledge River Railroad Bridge