▁cause ▁serious ▁incon ven ience : ▁not ▁until ▁ 1 8 5 8 ▁were ▁there ▁through ▁trains ▁( C ock erm outh ▁- ▁White h aven ▁May ▁ 1 8 5 8 , ▁C ock erm outh ▁- ▁Carl is le ▁August ▁ 1 8 5 8 . ▁The ▁coal ▁traffic ▁was ▁to ▁use ▁the ▁W J R ▁to ▁reach ▁the ▁south ▁bank ▁of ▁the ▁Der w ent , ▁and ▁then ▁branch ▁off ▁to ▁coal ▁dro ps ▁on ▁the ▁north ▁side ▁of ▁Work ington ▁har bour . ▁However , ▁the ▁railway ▁was ▁noted ▁at ▁the ▁opening ▁celebr ations ▁to ▁be ▁' near ly ▁finished ': ▁prov isions ▁for ▁handling ▁the ▁min eral ▁traffic ▁were ▁not ▁yet ▁in ▁place , ▁ ▁coal ▁traffic ▁only ▁began ▁in ▁June ▁ 1 8 4 7 ▁ ▁and ▁one ▁of ▁the ▁three ▁additional ▁coal ▁dro ps ▁at ▁Work ington ▁Har bour ▁was ▁still ▁not ▁completed ▁in ▁August ▁ 1 8 4 8 ▁▁ ▁The ▁prospect us ▁proved ▁to ▁have ▁under est im ated ▁the ▁cost ▁of ▁the ▁railway , ▁and ▁over est im ated ▁its ▁traffic , ▁and ▁hence ▁re venue . ▁By ▁the ▁first ▁half ▁of ▁ 1 8 4 9 ▁( when ▁the ▁har bour ▁improvements ▁were ▁complete ) ▁the ▁total ▁capital ▁exp end iture ▁on ▁the ▁railway ▁was ▁over ▁£ 1 2 0 , 0 0 0 ▁and ▁the ▁re venue ▁from ▁min er als ▁traffic ▁was ▁only ▁£ 1 , 4 8 4 ▁from ▁co als , ▁£ 2 5 7 ▁from ▁l ime