ty ▁became ▁No . 3 ▁Jet ty . The ▁new ▁coal ▁jet ty ▁was ▁of ▁an ▁advanced ▁and ▁modern ▁design ▁for ▁its ▁time . ▁Co al ▁was ▁transport ed ▁from ▁the ▁mines ▁in ▁bottom - dump ▁w ag ons . ▁The ▁coal ▁was ▁dump ed ▁into ▁concrete ▁b unk ers , ▁drawn ▁out ▁by ▁a ▁steel ▁cross - fl ight ▁convey or ▁and ▁then ▁carried ▁out ▁to ▁the ▁two ▁mov able ▁load ers ▁located ▁on ▁the ▁jet ty ▁by ▁an ▁elect r ically ▁power ed ▁convey or ▁bel t . ▁The ▁two ▁move able ▁load ers ▁were ▁also ▁of ▁a ▁modern ▁design , ▁unlike ▁the ▁primitive ▁ch utes ▁and ▁sta ith es ▁used ▁up ▁to ▁that ▁time . ▁The ▁moving ▁load ers ▁removed ▁the ▁need ▁to ▁shift ▁the ▁ship ▁during ▁the ▁loading ▁operation . ▁Each ▁loader ▁had ▁a ▁bo om ▁convey or ▁and ▁a ▁ch ute . ▁The ▁No . 1 ▁Jet ty ▁was ▁capable ▁of ▁a ▁peak ▁rate ▁of ▁ 7 5 0 ▁tons ▁per ▁hour ▁but ▁due ▁to ▁constraints ▁on ▁the ▁speed ▁at ▁which ▁vessels ▁could ▁be ▁loaded ▁and ▁kept ▁in ▁trim , ▁its ▁real istic ▁rate ▁was ▁an ▁average ▁about ▁ 5 2 0 ▁tons ▁per ▁hour ▁at ▁most . ▁ ▁The ▁No . 2 ▁Jet ty ▁had ▁become ▁unsafe ▁and ▁had ▁fallen ▁out ▁of ▁use ▁by ▁ 1 9 1 6 . ▁It ▁was ▁demol ished ▁as ▁far ▁back ▁as ▁the ▁high - water ▁line ▁in ▁ 1 9 2 5 . ▁The ▁No . 3 ▁Jet ty ▁was