Well, I think I saw this photo posted in 2 other albums here. Perhaps those are the ones you're looking for?
Well, I asked if it was originally a doubletrack tunnel. I cannot recall if I posted it on the forums, or not.
Appearantly it was built for double track but I can find no evedence there was ever two tracks through the tunnel. there's another tunnel about 15 miles west of this one and it too looks wide but single track.