▁increasing ▁size ▁of ▁rolling ▁stock ▁necess itated ▁a ▁conversion ▁to ▁single ▁track ▁after ▁ 1 8 6 5 . ▁Gr out ing ▁and ▁under pin ning ▁work ▁was ▁required ▁in ▁ 1 8 8 9 ▁through ▁the ▁entire ▁length ▁of ▁the ▁tunnel , ▁and ▁additional ▁brick ▁l ining ▁was ▁later ▁installed ▁in ▁the ▁section ▁with ▁iron ▁lin ers . ▁ ▁The ▁single - track ▁tunnel ▁was ▁by pass ed ▁by ▁a ▁double - track ▁tunnel ▁in ▁ 1 9 1 2 . ▁The ▁new ▁tunnel ' s ▁east ▁portal ▁incorpor ated ▁the ▁old ▁east ▁portal , ▁and ▁the ▁original ▁tunnel ▁continued ▁in ▁service . ▁The ▁old ▁bore ▁was ▁abandoned ▁and ▁se aled ▁in ▁ 1 9 6 2 . ▁ ▁See ▁also ▁List ▁of ▁t unn els ▁documented ▁by ▁the ▁Historic ▁American ▁Engineering ▁Record ▁in ▁West ▁Virginia ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : H istor ic ▁American ▁Engineering ▁Record ▁in ▁West ▁Virginia ▁Category : R ail road ▁t unn els ▁in ▁West ▁Virginia ▁Category : T unn els ▁completed ▁in ▁ 1 8 5 2 ▁Category : B alt imore ▁and ▁Ohio ▁Rail road ▁t unn els ▁Category : Build ings ▁and ▁structures ▁in ▁Pr eston ▁County , ▁West ▁Virginia ▁Category : 1 8 5 2 ▁establish ments ▁in ▁Virginia <0x0A> </s> ▁Edward ▁M ead ▁Ear le ▁( 1 8 9 4 ▁— ▁June ▁ 2 3 , ▁ 1 9 5 4 ) ▁was ▁an ▁American ▁author ▁and ▁university ▁lect urer ▁who ▁special ized ▁in ▁the ▁role ▁of ▁the ▁military