State Line tunnels....

but not really, since they actually lie 3 miles inside New York state in the town of Canaan. Led by GE C32-8 6613, westbound PWSE exits the west portal of the origional State Line tunnel, which was bored in ca.1840 by the Albany & West Stockbridge RR, a partially-owned subsidiary of the Western RR. These two roads, plus the Boston & Worcester eventually merged in 1869 to become the Boston & Albany.
After the NYC&HRRR leased the B&A in 1900, the railroad was upgraded with added trackage, minor line relocations and the addition of a second bore at State Line. The "new bore" is wider and taller than the origional and with the single-tracking of the B&A in the late 1980's by ConRail, the track through the origional bore was removed with the "single main" utilising the second bore.
Taken on June 24, 1988, the old westbound main was on borrowed time.