former ly ▁the ▁At g len ▁and ▁Sus que h anna ▁Branch ▁of ▁the ▁Pennsylvania ▁Rail road ) ▁over ▁the ▁Sus que h anna ▁River ▁between ▁Mar iet ta , ▁Pennsylvania ▁and ▁W ago ▁J unction , ▁Pennsylvania . ▁ ▁Const ruction ▁During ▁the ▁early ▁ 2 0 th ▁century , ▁the ▁PR R ▁constructed ▁what ▁it ▁referred ▁to ▁as ▁its ▁" L ow - G rade ▁L ines ", ▁branches ▁constructed ▁with ▁a ▁minimal ▁grade ▁to ▁di vert ▁fre ight ▁traffic ▁from ▁its ▁con g ested ▁and ▁ste eper ▁main ▁lines . ▁One ▁of ▁these ▁new ▁lines ▁was ▁the ▁At g len ▁and ▁Sus que h anna ▁Branch , ▁which ▁left ▁the ▁Main ▁Line ▁at ▁Park es burg ▁to ▁cut ▁cross - count y ▁to ▁the ▁Sus que h anna ▁River , ▁followed ▁the ▁east ▁bank ▁of ▁the ▁river ▁to ▁Mar iet ta , ▁crossed ▁the ▁river ▁and ▁ran ▁along ▁the ▁west ▁bank ▁to ▁W ago ▁J unction , ▁where ▁it ▁met ▁the ▁Northern ▁Central ▁Railway . ▁The ▁line ▁from ▁Mar iet ta ▁to ▁W ago ▁J unction ▁was ▁char tered ▁as ▁the ▁York ▁H aven ▁and ▁Row en na ▁Rail road , ▁and ▁much ▁of ▁the ▁construction , ▁including ▁the ▁crossing ▁of ▁the ▁Sus que h anna ▁at ▁Sho cks ▁M ills , ▁was ▁done ▁by ▁H . S . ▁Ker b augh , ▁a ▁major ▁PR R ▁contract or . ▁The ▁bridge ▁was ▁first ▁opened ▁on ▁January ▁ 1 , ▁ 1 9 0 5 , ▁as ▁a ▁twenty -