The Tunnel is still passable at this point, although the approach to the portals on both ends is rather muddy. It was very interesting to see most of the railroad ties are still in place on the east and west ends of the tunnel, and the fact that the stone portions inside of the tunnel appear almost in pristine condition, not to mention the "1912" inscribed on the eastern portal is still plain as day.
If you plan to make the excursion, bring a bright flashlight, be prepared to climb over lots of fallen timbers/rocks, and make sure your boots come up to at least your knees, as there is water about 1.5 feet deep for about 15-20 feet on the west portal side of the tunnel, and one section of thick mud toward the middle. Also, if moving east to west, after you pass the gorge, go up onto the south ledge and follow the gorge rim until you hit a pactch of goldenrod, there is a 4-wheeler path there that will take you right back to Rt. 92.
If you dig around in the gorge on the west end there's a good chance to recover some old spikes too!