▁The ▁bridge ▁carrying ▁the ▁highway ▁is ▁a ▁six - panel ▁single - span ▁steel ▁Pr att ▁through ▁tr uss ▁bridge , ▁rest ing ▁on ▁concrete ▁ab ut ments . ▁ ▁Its ▁length ▁is ▁ ▁and ▁its ▁width ▁is ▁, ▁with ▁a ▁portal ▁clear ance ▁height ▁of ▁. ▁ ▁It ▁stands ▁about ▁ ▁above ▁the ▁river ▁and ▁car ries ▁two ▁lan es ▁of ▁traffic . ▁ ▁The ▁tr uss es ▁are ▁formed ▁out ▁of ▁rolled ▁I - be ams ▁that ▁were ▁assemble d ▁on ▁site ▁using ▁hyd ra ul ic ▁riv eting , ▁a ▁technology ▁introduced ▁in ▁the ▁ 1 9 2 0 s . ▁ ▁The ▁deck ing ▁consists ▁of ▁pav ement ▁laid ▁on ▁concrete ▁over ▁I - be ams ▁that ▁are ▁mounted ▁on ▁the ▁tr uss ▁bottom ▁ch ords ▁and ▁riv et ed ▁to ▁their ▁vertical ▁elements . ▁ ▁The ▁bridge ▁was ▁built ▁in ▁ 1 9 3 7 , ▁and ▁was ▁built ▁using ▁standards ▁and ▁techn ologies ▁introduced ▁by ▁the ▁state ▁during ▁a ▁bridge - building ▁program ▁introduced ▁after ▁a ▁major ▁flo oding ▁event ▁in ▁the ▁state ▁in ▁ 1 9 2 7 . ▁ ▁It ▁is ▁a ▁well - pres erved ▁example ▁of ▁a ▁Pr att ▁tr uss ▁of ▁the ▁period , ▁and ▁the ▁riv eting ▁technology ▁enabled ▁the ▁bridge ▁to ▁be ▁fabric ated ▁on ▁site , ▁rather ▁than ▁sh ipping ▁the ▁tr uss es ▁from ▁a ▁factory . ▁ ▁See ▁also ▁▁▁▁▁▁▁▁▁ ▁National ▁Register ▁of ▁Historic ▁Places ▁list ings ▁in ▁Es sex ▁County , ▁Verm ont ▁ ▁List ▁of