Built in 1834-1835, it is the last known Viaduct of it’s kind that is still in use in the modern world. The structure serves railroad transportation capacity of up to 104 trains per day, for Amtrak, CSX, and the MBTA.
Each stone has a Mason’s mark to identify who cut the stone.
The materials used to build this magnificent structure include variations of granite, steel, iron, cement, concrete, mortar, wood and rubber.
There are examples of Fibonacci numbers and golden ratios in the Canton Viaduct:
- The inscription on the back of the Dedication Stone is recessed into an elongated octagon.
- The original roadway portal was built through the eighth cavity from the south end and the concrete roadway portal was built through the thirteenth cavity from the north end.
- The rise of the original roadway portal is 8 rows and the rise of each deck arch is 3 rows.
- There are 5 voussoirs in each arch row (depth) of the original roadway portal and river portals.
- There are 21 deck arches on each side of the viaduct and 21 voussoirs in each deck arch.
- There are 21 cavities in the viaduct.
- There are 13 voussoirs in each river portal.
- There are 3 rows of stones in the Canton Viaduct monument, the bottom and middle rows have 8 stones each.