A lot of the goods depot and areas around the station are built on the backfill from the tunnel. A lot of it was dug up when the Dean Hotel was under construction. The gradient is 1 in 75 through the tunnel and after Kilbarry it steepened to 1 in 60 to Rathpeacon. It took 3 steam engines to lift the heavy mail trains from Cork , 2 in front and a banking engine at the rear. The 3 Queen 800 class locos did it solo. The Madbh , Macha and Tailte. built in 1937 at Inchicore.
I was just wondering about the history of the tunnel the other day actually, so this is very timely. God knows, we wouldn't build anything like it thesedays anyway.