ers ▁in ▁the ▁river ▁itself , ▁each ▁made ▁of ▁brown stone ▁m ason ry ▁and ▁rising ▁ ▁above ▁the ▁low - water ▁mark . ▁ ▁Because ▁bed rock ▁could ▁not ▁be ▁located ▁in ▁the ▁river bed , ▁the ▁pi ers ▁rest ed ▁on ▁pil ings ▁and ▁gr ill age . ▁The ▁sub structure ▁of ▁the ▁bridge ▁consisted ▁of ▁iron ▁Peg ram ▁tr uss es . ▁On ▁the ▁north western ▁side ▁of ▁the ▁bridge , ▁the ▁tr uss es ▁from ▁the ▁shore ▁to ▁the ▁first ▁and ▁second ▁ab ut ments ▁were ▁above ▁the ▁bridge , ▁so ▁as ▁not ▁to ▁inter f ere ▁with ▁the ▁passage ▁of ▁the ▁B & PR ▁trains ▁below ▁the ▁bridge . ▁The ▁other ▁tr uss es ▁were ▁all ▁sl ung ▁below ▁the ▁bridge . ▁Each ▁of ▁the ▁ 1 0 ▁tr uss es ▁over ▁the ▁pi ers ▁was ▁ ▁long ▁and ▁painted ▁dark ▁red . ▁They ▁had ▁a ▁clear ance ▁of ▁just ▁ ▁over ▁the ▁high - water ▁mark . ▁The ▁road way ▁was ▁just ▁ ▁wide , ▁and ▁consisted ▁of ▁o ak ▁plans ▁over ▁iron ▁be ams . ▁Un like ▁the ▁previous ▁brid ges , ▁there ▁was ▁no ▁draw ▁span . ▁ ▁A ▁watch man ' s ▁h ut ▁was ▁constructed ▁near ▁the ▁north western ▁termin us . ▁Because ▁of ▁the ▁concern ▁that ▁ped est ri ans ▁might ▁inter f ere ▁with ▁veh icular ▁traffic , ▁causing ▁carri ages ▁to ▁drive ▁off ▁the ▁bridge ▁and ▁land ▁on ▁the ▁railway ▁tracks ▁below , ▁a ▁ ▁wooden ▁f ence ▁was ▁ere